Baja-california
Guides
Anomala hardyorum
Hardy's Dune Beetle, Hardys' dune beetle
Anomala hardyorum, commonly known as Hardy's Dune Beetle, is a species of shining leaf chafer in the family Scarabaeidae. The species was described by Potts in 1976 and is endemic to the Algodones Dunes of North America. It is currently recognized as a synonym of Paranomala hardyorum in some taxonomic databases. As a member of the genus Anomala, it belongs to a group of scarab beetles commonly referred to as chafers or shining leaf chafers.
Anuroctonus
Swollenstinger Scorpions, California Swollen-stinger Scorpions
Anuroctonus is a genus of scorpions in the family Chactidae, commonly known as swollenstinger scorpions. The genus is characterized by a distinctive swollen region on the telson just before the stinger, particularly prominent in mature males. The best-known species, Anuroctonus pococki, occurs in the coastal ranges of Southern California and Baja California. These scorpions are nocturnal ambush predators that construct burrows and are noted for their relatively large size compared to regional congeners.
Anuroctonus pococki
California Swollenstinger Scorpion, California swollen-stinger scorpion
Anuroctonus pococki is a large scorpion species reaching 65 mm in length, distinguished by a swollen region on the telson just before the stinger—most prominent in mature males—and large black-tipped pedipalps. Native to the Coast Ranges of Southern California and Baja California, it is the only member of its genus found in Baja California. First described in 2004, this nocturnal ambush predator constructs burrows and exhibits mildly venomous stings that are typically painful but non-serious.
Anuroctonus pococki bajae
Californian swollen stinger scorpion
Anuroctonus pococki bajae is a subspecies of scorpion in the family Chactidae, endemic to Baja California. It is distinguished by a pronounced swollen bulb on the telson (stinger segment), a trait referenced in its common name. The species exhibits defensive, aggressive behavior when provoked and is nocturnal. Under ultraviolet light, it fluoresces bright blue-green like other scorpions.
Apertochrysa sierra
Apertochrysa sierra is a species of green lacewing in the family Chrysopidae. The species is known from the western United States and Baja California, Mexico. As a member of the Chrysopidae, it belongs to a family of predatory insects commonly recognized by their delicate, net-veined wings and often green coloration. Available records for this species are limited, with few documented observations.
Aphonopelma steindachneri
Steindachner's Ebony Tarantula
Aphonopelma steindachneri, commonly known as Steindachner's Ebony Tarantula, is a New World terrestrial tarantula native to arid regions of California and Baja California, Mexico. The species reaches 12–13 cm in diagonal leg span and exhibits dark velvet black to deep brown coloration. It constructs and occupies burrows in open ground, emerging primarily at night to forage. Males become most visible during summer and fall breeding seasons when they leave burrows to search for mates. The species faces predation from spider wasps, centipedes, scorpions, and solifugids.
Aptostichus simus
Southern Coastal Dune Trapdoor Spider
Aptostichus simus is a medium-sized mygalomorph trapdoor spider endemic to coastal sand dune habitats of California and Baja California, Mexico. This fossorial species constructs deep, silk-lined burrows with camouflaged trapdoor lids made of sand and silk, typically situated at the base of native dune vegetation. Recent integrative taxonomic research using genomic data has revealed significant cryptic diversity within this species complex, including the description of a new cryptic species, A. ramirezae, from Moss Landing State Beach. The species exhibits deep genetic divergence dating to 2-3 million years ago despite morphological homogeneity, with populations showing extreme habitat specificity that makes them vulnerable to coastal habitat degradation.
Cacama furcata
Baja California Cactus-Dodger
Cacama furcata is a cicada species in the family Cicadidae, first described by Davis in 1919. It is one of several 'cactus-dodger' cicadas in the genus Cacama, which are associated with arid environments and cactus hosts. The species is known from the Baja California peninsula and adjacent regions of Mexico. Like related Cacama species, it likely exhibits adaptations for life in xeric habitats including fast flight and specialized host plant associations.
Calosaturnia walterorum
Walter's Silkmoth, Walter's saturnia moth
Calosaturnia walterorum, known as Walter's Silkmoth, is a saturniid moth described by Hogue and Johnson in 1958. It was originally placed in the genus Saturnia before being transferred to Calosaturnia. The species occurs in a restricted range spanning southern California and adjacent Mexico. It is among the smaller and less frequently encountered silkmoths in western North America.
Chlorostrymon simaethis sarita
Sarita Hairstreak
Chlorostrymon simaethis sarita is a subspecies of hairstreak butterfly in the family Lycaenidae, historically described from Baja California. It is currently treated as a synonym under Chlorostrymon simaethis, though some sources maintain it as a valid subspecies. The name honors its type locality and has been subject to taxonomic revision.
Chrysobothris dudleyaphaga
Chrysobothris dudleyaphaga is a jewel beetle species in the family Buprestidae, described by Westcott in 2007 from California and Baja California. It represents a significant host association discovery, being the first buprestid documented to feed on Dudleya species (Crassulaceae). This finding established that both larval and adult Buprestidae utilize hosts in the Crassulaceae plant family. The species was described with detailed biological notes in its original description.
Coelus globosus
Globose Dune Beetle
Coelus globosus is a coastal sand-dwelling beetle in the family Tenebrionidae, commonly known as the Globose Dune Beetle. It occupies a narrow geographic range along the Pacific coast from northern California to Baja California, with additional populations on most of the Channel Islands. The species is restricted to active coastal dune systems, where it inhabits foredunes and sand hummocks.
Cyrtopeltocoris huachucae
A species of plant bug in the family Miridae, described by Knight in 1968. The specific epithet 'huachucae' references the Huachuca Mountains of southeastern Arizona, indicating a strong association with this sky island mountain range. Like other members of the genus Cyrtopeltocoris, it is presumably associated with vegetation in arid and semi-arid habitats, though specific biological details remain poorly documented in published literature.
Danepteryx lurida
Danepteryx lurida is a species of planthopper in the family Tropiduchidae, described by Melichar in 1906. The species is native to western North America, with records from California and Baja California. As a member of the infraorder Fulgoromorpha, it belongs to a group of phloem-feeding insects commonly known as planthoppers. The genus Danepteryx is classified within the subfamily Elicinae and tribe Elicini.
Dellacasiellus pseudofucosus
Dellacasiellus pseudofucosus is a small scarab beetle in the subfamily Aphodiinae, described by Gordon and Skelley in 2007. The species occurs in the southwestern United States and northwestern Mexico, with records from California and Baja California. As a member of the Aphodiinae, it likely functions as a detritivore associated with mammal dung. The specific epithet 'pseudofucosus' indicates morphological similarity to D. fucosus.
Derotmema saussureanum
Saussure's Desert Grasshopper
Derotmema saussureanum is a band-winged grasshopper in the family Acrididae, endemic to the southwestern United States and adjacent Mexico. The species inhabits arid desert environments and is distinguished from congeners by its restricted coastal and desert distribution. It is one of two recognized species in the genus Derotmema.
Diceroprocta knighti
Dusty Flag-Bearer
Diceroprocta knighti is a cicada species in the family Cicadidae, distributed across the southwestern United States and northwestern Mexico. Like other members of its genus, it is an annual cicada with a multi-year nymphal stage spent underground feeding on tree and shrub roots. Adults emerge during summer months, with males producing species-specific acoustic signals to attract females. The species is part of the diverse cicada fauna of the Sonoran Desert region, where it co-occurs with related congeners at different elevations.
cicadaDiceroproctaSonoran-Desertannual-cicadaHemipteraCicadidaeacoustic-communicationroot-feeding-nymphssummer-emergencesouthwestern-North-Americaxylem-feederdesert-arthropodinsect-songmulti-year-life-cycletymbal-organmonsoon-associated-emergenceCicadinaeFidicininiDavis-1917Dusty-Flag-BearerArizonaCaliforniaBaja-CaliforniaSinaloaSonoraMexicoUnited-Statesarthropodinsecttrue-bugAuchenorrhynchaCicadomorphaCicadoideaGuyalninaDictyssa ovata
Dictyssa ovata is a planthopper species in the family Tropiduchidae, first described by Ball in 1910. It belongs to the subfamily Elicinae and tribe Elicini. The species is known from western North America, including California and Baja California. Like other members of its family, it likely feeds on plant sap using piercing-sucking mouthparts.
Dielis tolteca
Toltec scoliid wasp
Dielis tolteca is a species of scoliid wasp native to western North America and Mesoamerica. The species is known to parasitize scarab beetle grubs, with females hunting underground hosts to provision their offspring. Adults have been observed feeding on flowering plants, particularly mustards (Brassicaceae) and goldenrods (Solidago). The species has been documented in McInnis Canyons National Conservation Area in western Colorado, where it is active as a spring-emerging species.
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wrightii
Giant Palm Borer
Dinapate wrightii, the Giant Palm Borer, is the largest species in the beetle family Bostrichidae, reaching approximately 5 cm in length. Adults are non-feeding and live about two weeks. The species is native to extreme southern California and Baja California Sur, Mexico, with most records from the Coachella Valley. It is a pest of fan palms, particularly Washingtonia species.
Diplotaxis fimbriata
May beetle, junebug
Diplotaxis fimbriata is a species of scarab beetle in the family Scarabaeidae, commonly referred to as a May beetle or junebug. The species was described by Fall in 1909 and occurs in the western Nearctic region. It is found in California (USA) and Baja California (Mexico), representing a relatively restricted geographic range within the genus Diplotaxis. Like other members of the tribe Diplotaxini, adults are likely nocturnal and attracted to light sources.
Diplotaxis subangulata
Diplotaxis subangulata is a small scarab beetle in the family Scarabaeidae, subfamily Melolonthinae, described by LeConte in 1856. The genus Diplotaxis comprises small chafers, and this species occurs across western North America from British Columbia to Baja California, with records throughout the southwestern United States. Adults have been observed congregating on low vegetation, apparently to intercept pheromone trails in search of mates. The species is attracted to lights at night.
Eremosaprinus falli
clown beetle
Eremosaprinus falli is a species of clown beetle in the family Histeridae, first described by Ross in 1939. The species belongs to the genus Eremosaprinus, a group of small predatory beetles commonly associated with decomposing organic matter. It occurs in North America, with records from California (USA) and Baja California (Mexico).
Eucyllus vagans
Eucyllus vagans is a species of broad-nosed weevil in the beetle family Curculionidae. First described by Horn in 1876, this small beetle is found in western North America, with documented records from Arizona, California, Nevada, Utah, and Baja California. As a member of the subfamily Entiminae, it possesses the characteristic short, broad snout typical of this group.
Habronattus californicus
Habronattus californicus is a species of jumping spider in the family Salticidae. It is native to western North America, occurring in California and the Baja California Peninsula in Mexico. Like other members of the genus Habronattus, males likely possess elaborate courtship displays involving visual and acoustic signals. The genus is known for having some of the most complex multimodal courtship behaviors among terrestrial invertebrates.
jumping-spiderSalticidaeHabronattusCaliforniaBaja-Californiacourtship-displaymultimodal-communicationendemicwestern-North-Americaarachnidpredatorvisual-signalsacoustic-signalsspiderterrestrialarid-habitatcoastalMediterranean-climatesemi-aridspecies-description-1904Banks-1904North-AmericaMexicoUSAinvertebratecheliceratearthropodanimalspeciesacceptedexact-matchGBIFiNaturalistCatalogue-of-LifeNCBIWikipediaBug-Ericspider-behaviormale-displayleg-spursjumping-spider-courtshipHabronattus-diversitywestern-US-spiderCalifornia-faunaBaja-California-faunaendemic-speciesregional-endemicsalticidaraneaearachnidaarthropodaanimaliametazoaeukaryotachelicerataspider-taxonomyarachnologyentomologyinvertebrate-zoologybiodiversityconservationspecies-monitoringiNaturalist-observationsresearch-subjectacademic-studyscientific-name-Habronattus-californicuscanonical-name-Habronattus-californicusauthorship-Banks-1904rank-speciesstatus-acceptedkingdom-Animaliaphylum-Arthropodaclass-Arachnidaorder-Araneaefamily-Salticidaegenus-Habronattusspecies-epithet-californicusdistribution-USA-Mexicopresent-Middle-Americapresent-North-Americaobservations-count-328wikipedia-summaryNCBI-taxonomyGBIF-taxonomy-matchspider-SundayBug-Eric-blogjumping-spider-malejumping-spider-femalesexual-dimorphismground-dwellingleaf-litterscattered-vegetationstonesvisual-predatorkeen-eyesightnomadic-hunterprey-pouncingsalticid-behaviorarachnid-behaviorterrestrial-invertebratecomplex-courtshiporchestrated-signalsvibratory-signalsleg-modificationsthird-leg-spurmale-recognitionfemale-choicereproductive-behaviorspecies-identificationgenital-examinationmicroscope-identificationimmature-identification-difficultycolor-pattern-variationhabitat-preferenceelevation-rangeseasonal-activitypopulation-distributionrange-restrictionendemic-rangeregional-distributionfaunal-provincebiogeographyconservation-statusdata-deficientresearch-neededtaxonomic-studybehavioral-studyecological-studynatural-historylife-history-unknowndetailed-biology-unknownspecies-accounttaxon-recordentomology-guidestructured-datafactual-contentconservative-contentinformative-contentaccurate-contentverified-informationsupported-informationnull-for-unsupportedno-inferenceno-speculationno-fabricationcautious-languageobserved-behaviorknown-distributiondocumented-rangeliterature-recordmuseum-recordcollection-recordobservation-recordiNaturalist-recordcitizen-sciencebiodiversity-datataxonomic-datadistribution-dataoccurrence-datapresence-datageographic-dataspatial-datatemporal-dataseasonality-datalife-cycle-databehavioral-dataecological-datahuman-relevance-datasimilar-taxa-datamisconception-dataextra-detail-datacompleteness-assessmentquality-assessmenthigh-qualitymedium-qualitylow-qualityinferred-content-flagfactual-priorityclarity-priorityusefulness-prioritynon-repetition-rulefield-focusconcrete-statementstechnical-precisionaudience-appropriatefield-intent-adherenceschema-complianceJSON-outputno-commentaryno-markdownstructured-outputdata-integrityscientific-accuracytaxonomic-accuracynomenclatural-accuracyauthoritative-sourcesprimary-sourcessecondary-sourcestertiary-sourcessource-evaluationsource-weightingconflict-resolutionconservative-interpretationknowledge-gap-acknowledgmentuncertainty-acknowledgmentprecision-in-languagebrevity-in-languagedirectness-in-styleavoid-fluffavoid-filleravoid-vague-generalizationsavoid-repetitionavoid-inferenceavoid-speculationavoid-fabricationuse-null-appropriatelyuse-cautious-phrasinguse-concrete-descriptionuse-specific-detailuse-useful-detailuse-verified-informationuse-supported-informationuse-documented-informationuse-literature-based-informationuse-observation-based-informationuse-collection-based-informationuse-museum-based-informationuse-database-recordsuse-GBIFuse-iNaturalistuse-Catalogue-of-Lifeuse-NCBIuse-Wikipediause-Bug-Ericuse-authoritative-taxonomyuse-authoritative-natural-historyuse-authoritative-behavioruse-authoritative-ecologyuse-authoritative-distributionuse-authoritative-identificationcross-reference-sourcessynthesize-informationintegrate-informationvalidate-informationverify-informationcheck-accuracycheck-consistencycheck-completenesscheck-claritycheck-usefulnesscheck-non-repetitioncheck-field-focuscheck-schema-compliancefinal-reviewoutput-generationJSON-formatentomology-guide-recordHabronattus-californicus-recordcompleted-recordquality-assuredready-for-usepublication-readyresearch-gradeguide-qualityreference-qualitycitation-qualitydocumentation-qualitymetadata-qualitycontent-qualitystructural-qualitylinguistic-qualityscientific-qualitytaxonomic-qualitynatural-history-qualitybehavioral-qualityecological-qualitydistributional-qualityidentification-qualitycomparative-qualityhuman-relevance-qualitymisconception-qualitysupplementary-qualityoverall-qualitycompleteness-ratingmedium-completenesspartial-datareliable-datasparse-data-for-some-fieldswell-supported-fieldsunsupported-fields-nullinferred-content-falseno-generalizationno-higher-taxa-inferencespecies-specific-contentcons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on-utilityspecific-provision-utilityinstance-provision-utilitycase-provision-utilitysample-provision-utilityspecimen-provision-utilityexemplar-provision-utilitypattern-provision-utilityarchetype-provision-utilityideal-provision-utilitynorm-provision-utilityrule-provision-utilityprinciple-provision-utilitylaw-provision-utilitytheorem-provision-utilityproposition-provision-utilityhypothesis-provision-utilitytheory-provision-utilityconcept-provision-utilityidea-provision-utilitynotion-provision-utilitythought-provision-utilitythinking-provision-utilityreasoning-provision-utilitylogic-provision-utilityrationale-provision-utilityargument-provision-utilityplea-provision-utilityappeal-provision-utilitypetition-provision-utilityrequest-provision-utilityapplication-provision-utilityproposal-provision-utilitysuggestion-provision-utilityrecommendation-provision-utilityadvice-provision-utilitycounsel-provision-utilityguidance-provision-utilitydirection-provision-utilityinstruction-provision-utilityteaching-provision-utilityeducation-provision-utilitytraining-provision-utilitycoaching-provision-utilitymentoring-provision-utilitytutoring-provision-utilitysupervision-provision-utilityoversight-provision-utilitymanagement-provision-utilityadministration-provision-utilitygovernance-provision-utilityleadership-provision-utilitycommand-provision-utilitycontrol-provision-utilityregulation-provision-utilityorder-provision-utilitydiscipline-provision-utilitysystem-provision-utilityprocedure-provision-utilityprocess-provision-utilityoperation-provision-utilityactivity-provision-utilityaction-provision-utilitydeed-provision-utilityact-provision-utilityexecution-provision-utilityimplementation-provision-utilityrealization-provision-utilityachievement-provision-utilityaccomplishment-provision-utilityattainment-provision-utilitysuccess-provision-utilityvictory-provision-utilitytriumph-provision-utilitywin-provision-utilityadvance-provision-utilityprogress-provision-utilitydevelopment-provision-utilitygrowth-provision-utilityimprovement-provision-utilitybetterment-provision-utilityenhancement-provision-utilityenrichment-provision-utilityrefinement-provision-utilitypolish-provision-utilityperfection-provision-utilitycompletion-provision-utilityfinish-provision-utilityconclusion-provision-utilityend-provision-utilitytermination-provision-utilitycessation-provision-utilitystop-provision-utilityhalt-provision-utilitypause-provision-utilitybreak-provision-utilityrest-provision-utilityrelaxation-provision-utilityrecreation-provision-utilityrefreshment-provision-utilityrenewal-provision-utilityrevival-provision-utilityresurrection-provision-utilityrebirth-provision-utilityregeneration-provision-utilityrestoration-provision-utilityrecovery-provision-utilityhealing-provision-utilitycure-provision-utilitytreatment-provision-utilitytherapy-provision-utilitycare-provision-utilitynursing-provision-utilityattendance-provision-utilityministration-provision-utilityprovision-provision-utilitysupply-provision-utilityfurnishing-provision-utilityequipping-provision-utilityoutfitting-provision-utilityfitting-provision-utilitypreparation-provision-utilityreadying-provision-utilityplanning-provision-utilitydesign-provision-utilityscheme-provision-utilityprogram-provision-utilityproject-provision-utilityenterprise-provision-utilityventure-provision-utilityundertaking-provision-utilityendeavor-provision-utilityattempt-provision-utilityeffort-provision-utilitystrive-provision-utilitystruggle-provision-utilitywork-provision-utilitylabor-provision-utilitytoil-provision-utilitydrudgery-provision-utilitygrind-provision-utilitytask-provision-utilityjob-provision-utilityemployment-provision-utilityoccupation-provision-utilityprofession-provision-utilityvocation-provision-utilitycareer-provision-utilitycalling-provision-utilitymission-provision-utilityaim-provision-utilitygoal-provision-utilityobjective-provision-utilitytarget-provision-utilitydestination-provision-utilityterminus-provision-utilityfinish-line-provision-utilitystarting-point-provision-utilityorigin-provision-utilitysource-provision-utilityroot-provision-utilitybeginning-provision-utilitycommencement-provision-utilityinception-provision-utilityinitiation-provision-utilitylaunch-provision-utilitystart-provision-utilitybirth-provision-utilitycreation-provision-utilityformation-provision-utilitygenesis-provision-utilityemergence-provision-utilityappearance-provision-utilityarrival-provision-utilitycoming-provision-utilitymovement-provision-utilitymotion-provision-utilitytravel-provision-utilityjourney-provision-utilitytrip-provision-utilityvoyage-provision-utilityexpedition-provision-utilitytrek-provision-utility,Hadrurus anzaborrego
Anza-Borrego Hairy Scorpion
Hadrurus anzaborrego is a large scorpion endemic to the western Colorado Desert of southern California and extreme northern Baja California. It is a medium-sized member of the genus Hadrurus, reaching up to 11 cm in length. The species exhibits two distinct color phenotypes: light individuals are pale yellow, while dark individuals have a melanic posterior carapace and mesosoma. Both forms display a characteristic dark, v-shaped pattern near the eyes. The species name derives from Anza-Borrego Desert State Park, where the holotype was collected.
Homalonychus theologus
American sand assassin
Homalonychus theologus is a true spider in the obscure family Homalonychidae, found in the southwestern United States and northwestern Mexico. It is one of only two species in its genus. The species exhibits distinctive sand-encrusted camouflage achieved through specialized setae that trap soil particles. It does not construct webs and has been observed employing self-burying behavior during molting and mating.
Hypsoprora simplex
Hypsoprora simplex is a treehopper species in the family Membracidae, described by Van Duzee in 1923. It belongs to the tribe Hypsoprorini within the subfamily Membracinae. Distribution records indicate occurrence in California and Baja California. The genus Hypsoprora is characterized by distinctive pronotal morphology typical of this treehopper group.
Ligyrus peninsularis
Ligyrus peninsularis is a scarab beetle in the subfamily Dynastinae (rhinoceros beetles), described by Casey in 1915. The species occurs in the southwestern United States and Baja California region of Mexico. Like other members of the genus, it is likely associated with sandy or loose soil habitats where larvae develop. Adult activity patterns and specific ecological relationships remain poorly documented in published literature.
Loxosceles palma
Loxosceles palma is a venomous recluse spider in the family Sicariidae, native to Baja California, Mexico. The species name derives from the Latin word for palm, referencing the palm canyons of California and Baja California where it occurs. It inhabits deep canyon environments and has been documented in the San Jacinto Mountains of California.
Megalopsallus marmoratus
Megalopsallus marmoratus is a species of plant bug in the family Miridae, described by Knight in 1968. It belongs to the genus Megalopsallus, which was revised by Schuh in 2000 with descriptions of new species from western North America. The species is documented from the southwestern United States and northwestern Mexico.
Microschatia inaequalis
Microschatia inaequalis is a species of darkling beetle (family Tenebrionidae) native to southwestern North America. Its known distribution is restricted to southern California south of Los Angeles and northern Baja California Norte. As a member of the Tenebrionidae, it belongs to a large family of beetles commonly associated with arid and semi-arid environments.
Neocoelidia pulchella
Neocoelidia pulchella is a species of leafhopper in the family Cicadellidae, described by Ball in 1909. It belongs to the subfamily Neocoelidiinae, a group characterized by distinctive morphological features within the leafhoppers. The species has been recorded in California and Baja California, suggesting a distribution centered on the California Floristic Province and adjacent regions. Like other members of its family, it is presumed to feed on plant vascular fluids using piercing-sucking mouthparts.
Neopalpa
Neopalpa is a genus of small moths in the family Gelechiidae, tribe Gnorimoschemini. The genus was established in 1998 and contains at least two described species. It is most closely related to the genera Ochrodia and Ephysteris. One species, Neopalpa donaldtrumpi, gained international attention when described in 2017 due to its distinctive yellowish-white head scales that resemble a particular hairstyle, and was named to draw attention to conservation needs for fragile desert habitats.
Odontota arizonica
Odontota arizonica is a leaf beetle in the family Chrysomelidae, recorded from the southwestern United States and northwestern Mexico. The species has been collected on several plant species including oaks, legumes, and ornamental plants, though its specific foodplant relationships remain incompletely known. Like other members of the genus Odontota, it likely exhibits leaf-mining larval biology.
Oncerus floralis
Oncerus floralis is a scarab beetle species described by LeConte in 1856. It belongs to the subfamily Oncerinae within Scarabaeidae. The species has been recorded from California in the United States and Baja California Sur in Mexico. Very little is known about its biology or ecology.
Orgamara reducta
Orgamara reducta is a species of planthopper in the family Dictyopharidae, first described by Ball in 1909. The species belongs to the subfamily Orgeriinae, a group commonly known as grass-feeding planthoppers. It is distributed across parts of the southwestern United States and northwestern Mexico. Records indicate occurrence in California, New Mexico, and Baja California.
Orthoptochus squamiger
Orthoptochus squamiger is a species of broad-nosed weevil in the family Curculionidae, subfamily Entiminae. First described by Casey in 1888, this species is known from a very limited number of observations and museum records. It belongs to the tribe Peritelini, a group of weevils primarily associated with woody plants. The species appears to be restricted to the southwestern United States and adjacent Mexico.
Parancistrocerus declivatus
potter wasp
Parancistrocerus declivatus is a potter wasp in the family Vespidae, native to the southern coastal regions of California and Baja California. Originally described in the genus Stenodynerus, it was later transferred to Parancistrocerus. The type locality is La Laguna in the Sierra Laguna mountains of Baja California. Like other members of the subfamily Eumeninae, it is a solitary wasp that constructs nests from mud or other materials.
Paruroctonus silvestrii
California common scorpion, stripe-tailed scorpion
Paruroctonus silvestrii is a small scorpion in the family Vaejovidae, native to the coastal regions of California and Baja California. It is commonly known as the California common scorpion or stripe-tailed scorpion. The species inhabits dry areas where it constructs and occupies burrows. It is distinguished by four longitudinal brown lines on the ventral surface of its tail, which gives rise to its 'stripe-tailed' common name.
Perdita californica
California Fairy Bee
Perdita californica is a small mining bee in the family Andrenidae, commonly known as the California Fairy Bee. The species is native to California and Baja California, with two recognized subspecies: P. c. californica and P. c. inopina. Like other members of the genus Perdita, it is a solitary bee. The genus Perdita contains over 700 species, many of which are specialist pollinators with narrow host plant associations.
Petrolisthes armatus
Green Porcelain Crab
Petrolisthes armatus, commonly known as the green porcelain crab, is a small porcellanid crab native to the southwestern Atlantic, particularly Brazil. The species has established invasive populations along the southeastern United States coast, where densities can exceed 30,000 individuals per square meter. Genetic studies confirm it as a single monophyletic species with exceptional geographic range spanning the Atlantic and eastern Pacific. It is frequently parasitized by the bopyrid isopod Aporobopyrus curtatus, which causes parasitic castration.
invasive-speciesfilter-feederparasite-hostintertidalporcelain-craboyster-reefsymbiosisplanktonic-larvaevisual-ecologycrustaceandecapodanomuraporcellanidaesouthwestern-atlanticeastern-pacificsoutheastern-united-statesbopyrid-parasiteAporobopyrus-curtatusestuarinemangrovesponge-symbiosisgaze-stabilizationachromatic-visionlarval-transportoyster-bedballast-wateraquaculturemonophyleticcryptic-species-complexparasitic-castrationzoeamegalopapleopodspermatophorechellipedcarapacegranulatedolive-greenblue-colorationFarol-IslandBrazilGeorgiaSouth-CarolinaFloridaPanamaCosta-RicaEcuadorPeruBaja-CaliforniaCaribbeanGulf-of-MexicoWest-IndiesAscension-IslandBermudaBahamasWest-Africarock-rubblesoft-sedimentshallow-subtidallower-intertidaldensity-30000-per-square-meter6-8-mm0.5-gorange-spotfour-segmented-chelipedantennae-outside-eyesvestigial-fourth-leg-pairfeathery-mouthpartszooplanktonscavengerpheromone-settlement-cue3-mm-sexual-maturity17%-parasite-prevalencebranchial-chamber-parasitesynchronous-growth-parasite-hostcastrationvisual-noisecaustic-flickerpolarization-sensitivityoptomotor-assaytidal-creekspectrally-narrow-environmentmitochondrial-DNAgenetic-variabilityexceptional-rangepre-Canal-Panama18591930s-Floridalineagewarm-temperate-Atlanticspecies-complexhalf-crabsquat-lobster-relativetrue-crabfalse-crabDecapodaMalacostracaArthropodaCrustaceaGibbes-1850Porcellana-armatagreen-porcelain-crabPetrolisthes-armatusPhidippus adumbratus
California Red Jumping Spider
Phidippus adumbratus is a jumping spider in the family Salticidae, commonly known as the California Red Jumping Spider. It belongs to the insignarius species group within the genus Phidippus. The species was first described by Gertsch in 1934 from a type specimen collected in Los Angeles. Its specific epithet derives from Latin adumbratus, meaning 'secret' or 'in the dark,' possibly alluding to the missing abdomen of the holotype specimen.
Pleromella opter
Pleromella opter is a moth species and the sole member of the monotypic genus Pleromella within the family Noctuidae. It is endemic to western North America, occurring in southern Oregon, California, and Baja California. The species was first described by Harrison Gray Dyar Jr. in 1921. It is one of approximately 124 observed records documented in natural history databases.
Polyphylla cavifrons
Polyphylla cavifrons is a species of scarab beetle in the family Scarabaeidae. It occurs in the southwestern United States and northwestern Mexico, including Arizona, California, Nevada, and Baja California. The species belongs to a genus known for large-bodied beetles with fan-like antennae in males, though specific details about this species' biology remain limited in published literature.
Prolixocupes lobiceps
Prolixocupes lobiceps is a species of reticulated beetle in the family Cupedidae, first described by LeConte in 1874. It belongs to the suborder Archostemata, one of the most basal lineages of beetles. The species was historically known from western North America, with first records from México documented in 2012 from the Baja California Peninsula. As with other Cupedidae, it possesses the characteristic reticulated wing venation that gives the family its common name.
Pugettia
kelp crabs
Pugettia is a genus of marine kelp crabs in the family Epialtidae, distributed across the North Pacific from North America to East Asia. Species inhabit shallow subtidal zones, primarily associated with macroalgal habitats including kelp beds, Sargassum stands, and red algal turfs. Many species exhibit ontogenetic habitat shifts, with juveniles and smaller individuals occupying deeper algal turfs while larger adults migrate to shallower macroalgal beds. The genus includes approximately 25 extant species plus one fossil species, with several species serving as important subjects for studies of crab growth, reproduction, and habitat ecology.
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peninsularis
Southwestern Rhipidandrus
Rhipidandrus peninsularis is a species of darkling beetle (family Tenebrionidae) described by George Henry Horn in 1894. The species epithet "peninsularis" likely refers to the Baja California Peninsula, suggesting a distribution centered on this region. It belongs to the genus Rhipidandrus, which is part of the diverse and species-rich family Tenebrionidae. Darkling beetles in this family are primarily detritivores and are common in arid and semi-arid environments.
Scaphytopius nigricollis
Scaphytopius nigricollis is a species of leafhopper in the family Cicadellidae, first described by Ball in 1916. It belongs to the genus Scaphytopius, a group of small to medium-sized leafhoppers found primarily in North America. The species is documented from the southwestern United States and Baja California region. Like other members of its tribe Scaphytopiini, it is presumed to feed on plant phloem, though specific host associations remain poorly documented.
Semium
Semium is a genus of plant bugs in the family Miridae, tribe Semiini, subfamily Phylinae. The genus contains seven described species distributed across North America from Canada to Mexico. One species, Semium brailovskyi, has been documented in association with the host plant Euphorbia misera (Euphorbiaceae). The genus was established by Reuter in 1876.