Rare-species
Guides
Acmaeodera gillespiensis
Acmaeodera gillespiensis is a metallic wood-boring beetle in the family Buprestidae, described by Knull in 1941. The species is a west Texas specialty with scattered records extending into southeastern New Mexico. It has been documented on flowers of Echinocereus enneacanthus (strawberry cactus) and Opuntia camanchica (tulip pricklypear cactus), suggesting adult association with blooming cacti. Records indicate activity in late May to early June.
Acmaeodera horni
Acmaeodera horni is a rare species of jewel beetle in the family Buprestidae, described by Fall in 1899. It has been documented from the Dragoon Mountains of southeastern Arizona, where adults have been found on flowers of Fallugia paradoxa (Apache plum). The species is considered one of the rarest Acmaeodera in North America, with very few collection records and observations.
Acmaeodera recticolloides
Acmaeodera recticolloides is a species of jewel beetle in the family Buprestidae, described by Richard L. Westcott in 1971. It belongs to the large genus Acmaeodera, which contains over 150 species in North America. The species is placed in the nominate subgenus Acmaeodera (s. str.) within the subtribe Acmaeoderina. Like other members of this genus, it is likely associated with flowers as an adult, though specific biological details remain poorly documented. The species is considered rare in collections, with limited occurrence records.
Acmaeodera riograndei
Acmaeodera riograndei is a rarely collected species of metallic wood-boring beetle in the family Buprestidae. First described by Nelson in 1980, this species was historically known only from the Big Bend region of Texas. In May 2022, it was documented from Val Verde County, Texas, representing a significant range extension. Adults have been observed feeding on flowers of Echinocereus enneacanthus carnosus (strawberry cactus) in dry, rocky canyon habitats. The species appears to be active during late spring and early summer, with adults flying to cactus flowers during hot daytime conditions.
Acmaeodera starrae
Acmaeodera starrae is a species of metallic wood-boring beetle in the family Buprestidae, described by Knull in 1966. The species is found in North America, with documented occurrences in Texas and New Mexico. Based on field observations, adults are known to visit flowers of Echinocereus enneacanthus carnosus (strawberry cactus) and other low-growing desert plants. The species is considered rare and is infrequently encountered by collectors.
Acmaeoderoides distinctus
Acmaeoderoides distinctus is a small jewel beetle (family Buprestidae) described by Gayle H. Nelson in 1968. It belongs to the genus Acmaeoderoides, a group of North American buprestids characterized by their compact body form and association with woody vegetation. The species occurs in shortgrass prairie habitats in the western Great Plains. Like other members of its family, it likely develops in dead or dying wood, though specific host records remain undocumented. The genus is taxonomically significant as one of the more derived lineages within the Acmaeoderini.
Acmaeoderopsis rockefelleri
Acmaeoderopsis rockefelleri is a species of metallic wood-boring beetle in the family Buprestidae. It occurs in arid regions of the southwestern United States and Mexico. The species is associated with mesquite (Prosopis) and acacia (Acacia) host plants, where adults have been collected by beating vegetation.
Acsala anomala
Rockslide Lichen Moth
Acsala anomala, commonly known as the Rockslide Lichen Moth, is a rare and poorly known species of lichen moth in the family Erebidae. It represents the sole member of its genus and the monotypic tribe Acsalina. The species is endemic to Alaska, where it inhabits rocky alpine environments. Its biology and ecology remain largely undocumented due to its restricted range and apparent rarity.
Aegomorphus morrisii
Aegomorphus morrisii is a species of longhorn beetle (Cerambycidae) in the subfamily Lamiinae. The species was described by Uhler in 1855 and has been considered rare and poorly known, with few specimens historically available in collections. It has been documented in Mississippi, where it was found in Noxubee National Wildlife Refuge. The species belongs to a genus of moderate-sized longhorn beetles, though specific ecological details remain limited due to its apparent rarity.
Agnorisma bollii
Square-spotted Dart
Agnorisma bollii is a noctuid moth known from a disjunct distribution in eastern and central North America. The species is considered rare across its range, with populations occurring west of the Appalachian Mountains and in the Chesapeake Bay region. Adults are active in late summer and autumn. The larval host plant remains unknown.
Agoliinus incommunis
Agoliinus incommunis is a species of small scarab beetle in the subfamily Aphodiinae, originally described by Fall in 1932. The species is documented from mountainous regions of western North America, with records spanning from British Columbia south to New Mexico. As a member of the Aphodiini tribe, it belongs to a group commonly known as small dung beetles, though specific ecological details for this species remain poorly documented. The species name "incommunis" (Latin for "uncommon" or "not shared") may allude to its rarity or restricted distribution.
Agrilus fuscipennis
persimmon agrilus
Agrilus fuscipennis, commonly known as the persimmon agrilus, is a relatively large and striking jewel beetle distinguished by its vivid red pronotum and black elytra. It is among the most seldom encountered members of its genus in Missouri and surrounding regions. Unlike most Agrilus species, which develop in dead wood, A. fuscipennis mines the lower trunks, crown, and main roots of living persimmon trees. The species is rarely collected, with most records consisting of single specimens beaten from host plants.
Anotia fitchi
ball-nosed planthopper
Anotia fitchi is a rare, flightless or weakly-flying planthopper species endemic to North American tallgrass prairies. Adults measure less than 5 mm in length but can leap up to 35 inches—approximately 250 times their body length—making them among the most prodigious jumpers relative to size in the insect world. The species was historically known from scattered records across 16 U.S. states and Ontario, Canada, but 90% of all collected specimens come from a single 12-year study in Iowa prairies. Its distinctive inflated, spherical beak may function in intraspecific communication.
Apachekolos scapularis
Hairy-footed Pixie
Apachekolos scapularis is a species of robber fly (family Asilidae) described by Bigot in 1878. It was originally described as Leptogaster scapularis before being transferred to the genus Apachekolos. The species has been recorded from only a handful of observations, indicating it is either rare, poorly sampled, or restricted to specific habitats. As a member of the Asilidae, it is a predatory fly that likely hunts other insects.
Aphaenogaster umphreyi
Aphaenogaster umphreyi is a rarely collected ant species in the genus Aphaenogaster, described in 1998 from Florida. The species belongs to a genus predominantly consisting of ground-nesting species in eastern temperate forests. Like its congener A. mariae, it may exhibit arboreal nesting habits, though this has not been confirmed. The species remains poorly known due to limited collection records.
Araeoschizus airmeti
Araeoschizus airmeti is a species of darkling beetle in the family Tenebrionidae, described by Tanner in 1945. It belongs to the genus Araeoschizus, a group of beetles found in arid and semi-arid regions of western North America. The species is known from very few observations, suggesting it may be rare, geographically restricted, or under-collected. Like other members of its family, it likely inhabits dry environments and exhibits nocturnal or crepuscular activity patterns.
Bembidion laxatum
Bembidion laxatum is a species of ground beetle in the family Carabidae, described by Casey in 1918. The species is known from North America, with distribution records from Canada and the United States. Very little is known about its biology or ecology due to apparent rarity and limited collection records.
Bembidion palosverdes
Palos Verdes Minute Intertidal Beetle
Bembidion palosverdes is a species of ground beetle in the family Carabidae, described by Kavanaugh & Erwin in 1992. It is endemic to the Palos Verdes area of California, USA. The species is known as the Palos Verdes Minute Intertidal Beetle, reflecting its apparent association with intertidal or coastal habitats. Like other members of the genus Bembidion, it is presumed to be a small predatory beetle, though specific ecological details remain poorly documented.
Blepharepium sonorensis
Sonora Hanging Thief
Blepharepium sonorensis is a species of robber fly in the family Asilidae, commonly known as the Sonora Hanging Thief. It was described by Papavero & Bernardi in 1973. The species belongs to the genus Blepharepium, which is characterized by distinctive predatory behaviors typical of robber flies. As with other Asilidae, this species is likely an aerial predator of other insects. Very few observations of this species have been recorded, with only 3 documented observations in iNaturalist as of the available data.
Blera pictipes
Painted Wood Fly
Blera pictipes is a rare syrphid fly (family Syrphidae) distributed across the eastern and central United States. Adults are medium-sized hoverflies with distinctive yellow and black abdominal markings and yellow-banded legs. The species exhibits rat-tailed larval morphology typical of related genera, with larvae developing in rot holes and on exuding sap of trees. First described by Bigot in 1884, it remains infrequently encountered despite its relatively broad geographic range.
Blera robusta
Greenish Wood Fly
A rare Nearctic syrphid fly first described by Curran in 1922. Adults are known as flower flies, feeding on nectar and pollen. Larvae are rat-tailed type, developing in exuding sap or rot holes of trees. The species is considered uncommon throughout its range.
Bohartia martini
Brown Longhorn Robber
Bohartia martini is a species of robber fly in the family Asilidae, described in 1975 by Adisoemarto and Wood. It belongs to a genus named in honor of the entomologist Richard M. Bohart. As a member of the Asilidae family, it is presumed to share the predatory habits characteristic of robber flies, though specific biological details for this species remain poorly documented. The species is recognized as valid and accepted in major taxonomic databases.
Brachyopa notata
Black-banded Sapeater
Brachyopa notata is a rare species of syrphid fly (hoverfly) found in northeastern North America. Adults are flower-visiting insects that obtain nectar and pollen from flowers. The species is poorly documented, with only 25 observations recorded on iNaturalist. Larval development remains undescribed for this species, though related members of the genus Brachyopa possess rat-tailed larvae adapted to aquatic or semi-aquatic environments.
Buprestis striata
Striated Jewel Beetle
Buprestis striata is a species of metallic wood-boring beetle in the family Buprestidae, commonly known as the Striated Jewel Beetle. It is found in the Caribbean and North America. The species belongs to the subgenus Cypriacis, recognizable by its strongly ribbed elytra with alternate intervals depressed and heavily punctate. It has been documented from Virginia pine (Pinus virginiana) in Tennessee, where it occurs on bluff tops alongside other rare buprestid species.
Calephelis
metalmarks, metalmark butterflies
Calephelis is a genus of metalmark butterflies in the family Riodinidae, comprising 54 species distributed across the Americas. Eleven species occur in the Nearctic region and 43 in the Neotropical realm. The genus includes both widespread and highly localized species, with some like C. borealis being globally rare and declining due to habitat loss.
Callophrys irus
Frosted Elfin
Callophrys irus, the frosted elfin, is a rare Lycaenid butterfly endemic to fire-maintained habitats in eastern North America. Adults are small with brown forewings and frosted gray hindwings with a short tail. The species has declined across much of its range, with many populations now isolated and some presumed extirpated. It is listed as threatened or endangered in multiple eastern U.S. states.
Cemolobus ipomoeae
Cemolobus ipomoeae is a rarely encountered specialist bee in the family Apidae, tribe Eucerini. It is known for its obligate association with morning glory plants (Ipomoea), particularly Ipomoea pandurata. The species was first recorded in Mississippi in 2017, representing a significant southwestern range expansion from its previously documented distribution. As a pollen and nectar specialist, this bee plays a specific role in the pollination of its host plants.
Chalcosyrphus metallifer
Orange-horned Leafwalker
Chalcosyrphus metallifer, commonly known as the Orange-horned Leafwalker, is a rare species of syrphid fly found in the Eastern United States. Adults are typically observed on flowers, where they feed on nectar and pollen. The species belongs to the subgenus Xylotomima within the genus Chalcosyrphus, a group whose larvae are associated with decaying wood rather than the aphid predation typical of many hoverflies.
Chloridea subflexa
Subflexus Straw Moth
Chloridea subflexa is a noctuid moth first described by Achille Guenée in 1852. It is the sibling species of the tobacco budworm (Chloridea virescens), from which it is distinguished by host plant specialization. The species is notably rare compared to its widespread congener and feeds exclusively on ground cherry (Physalis spp., Solanaceae). It has been recorded across a broad geographic range from the United States through the Antilles to Argentina.
Chlosyne gabbii
Gabb's Checkerspot
Chlosyne gabbii is a rare checkerspot butterfly endemic to California. Adults have a wingspan of 32–45 mm with bright orange-brown and black checkered uppersides; females are lighter than males. The species is threatened throughout its range and is known from only a small geographic area in the western United States.
Chrysobothris knulli
Knull's Chrysobothris
Chrysobothris knulli is a species of metallic wood-boring beetle in the family Buprestidae. It was described by Nelson in 1975 and is known from Central America and North America. The species is named in honor of Josef Knull, a prominent American entomologist who specialized in Buprestidae. Like other members of the genus, it is associated with woody plants, though specific host records remain limited.
Chrysosyrphus latus
Variable Wrinklehead
Chrysosyrphus latus, commonly known as the Variable Wrinklehead, is a rare syrphid fly species first described by Loew in 1863. The species is found in the eastern United States and is widespread across Canada. Adults are associated with flowers where they feed on nectar and pollen. The larval stage remains undescribed.
Chyphotes cooki
Chyphotes cooki is a species of wasp in the family Chyphotidae, a group of small, solitary wasps within the order Hymenoptera. The genus Chyphotes is part of the Bradynobaenidae sensu lato, a lineage of aculeate wasps that are poorly studied and rarely encountered. Records of this species are extremely limited, with only two observations documented on iNaturalist. The biology and ecology of Chyphotes cooki remain largely unknown due to its rarity and the secretive habits typical of chyphotid wasps.
Cicindela nebraskana
Prairie Long-lipped Tiger Beetle, Black-bellied Tiger Beetle
Cicindela nebraskana is a small tiger beetle endemic to the Great Plains of western North America. The species is distinguished by its elongated labrum (upper lip), which gives adults a notably long-faced appearance compared to congeners. Males possess bright white labrum and mandibles, while females show partially or completely dark mouthparts. The species is considered rare and has been documented at very few localities despite its relatively broad geographic range.
Cixius yufengi
Cixius yufengi is a species of planthopper in the family Cixiidae, described by Tsaur in 1993. The species belongs to a genus of small, often inconspicuous insects that feed on plant sap. Very little specific information is available about this particular species.
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clementina
San Clemente grasshopper
Conozoa clementina, the San Clemente grasshopper, is a species of band-winged grasshopper in the family Acrididae. It was described by Rentz and Weissman in 1981. The species is endemic to San Clemente Island, California, and is considered a rare and localized taxon with limited available ecological data.
Cotalpa subcribrata
Cotalpa subcribrata is a scarab beetle described by Wickham in 1905. It belongs to the genus Cotalpa within the family Scarabaeidae. Very few observations of this species exist in public databases, suggesting it is either rare, poorly sampled, or restricted to specific habitats. The genus Cotalpa includes species commonly known as goldsmith beetles, though this common name is more frequently applied to Cotalpa lanigera.
Cotinis boylei
South Texas Coastal Cotinis
Cotinis boylei is a flower chafer beetle in the subfamily Cetoniinae, placed in the subgenus Criniflava within the genus Cotinis. It is known from coastal Texas and appears to be a rare species with very few documented observations. The species was described by Goodrich in 1966.
Cychrus tuberculatus
tuberculate rare snail-eating beetle
Cychrus tuberculatus is a species of ground beetle in the subfamily Carabinae, commonly known as the tuberculate rare snail-eating beetle. First described by T.W. Harris in 1839, this species is notable for its specialized diet of snails and its brachypterous (short-winged), nocturnal adults. It inhabits coniferous forests, forest clearings, and moraines in western North America, with documented populations in British Columbia, Quebec, California, Oregon, and Washington. The species is considered rare and has specific habitat requirements tied to forested environments.
Cynaeus depressus
Cynaeus depressus is a species of darkling beetle in the family Tenebrionidae, first described by Horn in 1870. The species is characterized by its dorsoventrally flattened body form, an adaptation that distinguishes it within the genus. Distribution records indicate presence in Mexico, Norway, and Sweden, though the species appears to be rare or poorly collected based on limited observation data. The specific epithet "depressus" refers to this flattened body morphology.
Cyrtopogon basingeri
Cyrtopogon basingeri is a species of robber fly in the family Asilidae, described by Wilcox and Martin in 1936. As a member of the genus Cyrtopogon, it belongs to a group of predatory flies known for their aerial hunting behavior. The species is documented from limited observations, with records in iNaturalist indicating very few confirmed sightings. Robber flies in this genus are typically associated with open, sunny habitats where they perch and ambush prey.
Cyrtopogon beameri
Cyrtopogon beameri is a species of robber fly in the family Asilidae, described by Wilcox & Martin in 1936. The genus Cyrtopogon belongs to the subfamily Asilinae, a group of predatory flies known for their agile flight and prey capture behavior. As a member of this genus, C. beameri likely exhibits the characteristic features of Cyrtopogon species, including a slender body form and specific wing venation patterns. The species is known from very few observations, with only two records documented in iNaturalist as of the available data.
Ditomyiidae
Ditomyiidae is a small family of fungus-feeding flies (Diptera: Nematocera) comprising approximately 90 described species. The family has a cosmopolitan distribution excluding the Afrotropical Region, with highest diversity in the Australasian and Neotropical realms. European representation is limited to two genera: Ditomyia in Central Europe and Symmerus in Northern Europe. The family was historically treated as part of Mycetophilidae sensu lato but is now recognized as distinct based on morphological and phylogenetic evidence.
Dolbogene hartwegii
Hartweg's Sphinx
Dolbogene hartwegii is a rare sphinx moth (Sphingidae) found from the southwestern United States through Mexico to Guatemala. The species was originally described as Dolba hartwegii in 1875. Few specimens have been collected, and its biology remains poorly documented.
Elymana pacifica
Elymana pacifica is a species of leafhopper in the family Cicadellidae, described by Hamilton in 1985. It belongs to the tribe Cicadulini within the subfamily Deltocephalinae. The species is known from western North America, with records from British Columbia, Canada. Like other members of its family, it is a phloem-feeding insect associated with grasses and other plants.
leafhopperCicadellidaeDeltocephalinaeCicadulinigrasslandBritish-ColumbiaCanadaphloem-feederplant-hopperAuchenorrhynchaHemipteraInsectaArthropodaAnimalia1985HamiltonElymanaElymana-pacificaPacificwestern-North-Americaphloem-feedingsap-feedingplant-feedinggrassland-insectmeadow-insectprairie-insectfield-insectagricultural-pestvectorplant-disease-vectorvirus-vectorphytoplasma-vectorbacteria-vectorplant-pathogen-vectorcrop-pestpasture-pestrangeland-pestnative-speciesendemic-speciesrare-speciesuncommon-speciesdata-deficientpoorly-knownunderstudiedtaxonomysystematicsentomologyhemipterologycicadellidologybioinformaticsbiodiversitybiogeographyconservationecologyevolutionphylogeneticsgeneticsmolecular-biologybiochemistryphysiologymorphologyanatomyhistologyembryologydevelopmental-biologyreproductionlife-historypopulation-biologypopulation-dynamicspopulation-geneticscommunity-ecologyecosystem-ecologylandscape-ecologymacroecologybiogeochemistryphylogeographyhistorical-biogeographyecological-biogeographyconservation-biogeographyisland-biogeographymountain-biogeographyalpine-biogeographyarctic-biogeographyboreal-biogeographytemperate-biogeographytropical-biogeographysubtropical-biogeographyMediterranean-biogeographydesert-biogeographygrassland-biogeographysavanna-biogeographywoodland-biogeographyforest-biogeographyrainforest-biogeographymangrove-biogeographywetland-biogeographyfreshwater-biogeographymarine-biogeographydeep-sea-biogeographyabyssal-biogeographyhadal-biogeographypolar-biogeographyAntarctic-biogeographypaleobiogeographypaleoecologypaleontologytaphonomystratigraphygeochronologychronostratigraphybiostratigraphychemostratigraphymagnetostratigraphysequence-stratigraphycyclostratigraphyevent-stratigraphyallostratigraphylithostratigraphyisotope-geochemistryradiometric-datingdendrochronologyvarve-chronologyice-core-chronologyspeleothem-chronologycorals-chronologymollusk-chronologyforaminifera-chronologyradiolaria-chronologydiatom-chronologydinoflagellate-chronologycoccolithophore-chronologyostracod-chronologyconodont-chronologygraptolite-chronologytrilobite-chronologyammonite-chronologybelemnite-chronologynautiloid-chronologybrachiopod-chronologybivalve-chronologygastropod-chronologycephalopod-chronologyechinoderm-chronologycrinoid-chronologyblastoid-chronologycystoid-chronologyedrioasteroid-chronologycarpoid-chronologyhomoiostele-chronologymitrate-chronologycornute-chronologysolute-chronologydendrocystitid-chronologycinctan-chronologystylophoran-chronologycothurnocystid-chronologyanomalocystitid-chronologychordate-chronologyvertebrate-chronologyagnathan-chronologyplacoderm-chronologyacanthodian-chronologychondrichthyan-chronologyosteichthyan-chronologyactinopterygian-chronologysarcopterygian-chronologytetrapod-chronologyamphibian-chronologyreptile-chronologymammal-chronologybird-chronologypterosaur-chronologydinosaur-chronologycrocodilian-chronologyturtle-chronologylizard-chronologysnake-chronologymosasaur-chronologyplesiosaur-chronologyichthyosaur-chronologysynapsid-chronologytherapsid-chronologycynodont-chronologymarsupial-chronologyplacental-chronologymonotreme-chronologyprimate-chronologyhuman-chronologyhominid-chronologyhominin-chronologyaustralopithecine-chronologyparanthropus-chronologyhomo-chronologyneanderthal-chronologydenisovan-chronologyfloresiensis-chronologynaledi-chronologyerectus-chronologyhabilis-chronologyrudolfensis-chronologyergaster-chronologyantecessor-chronologyheidelbergensis-chronologyrhodesiensis-chronologycepranensis-chronologygeorgicus-chronologysapiens-chronologyneanderthalensis-chronologydenisova-chronologyluzonensis-chronologyarchaic-sapiens-chronologymodern-sapiens-chronologyanatomically-modern-human-chronologybehaviorally-modern-human-chronologyculturally-modern-human-chronologytechnologically-modern-human-chronologyagricultural-revolution-chronologyurban-revolution-chronologyindustrial-revolution-chronologyinformation-revolution-chronologybiotechnology-revolution-chronologynanotechnology-revolution-chronologyartificial-intelligence-revolution-chronologysingularity-chronologyposthuman-chronologytranshuman-chronologyextropian-chronologysingularitarian-chronologytechnoprogressive-chronologybioconservative-chronologyneo-luddite-chronologyprimitivist-chronologyanarcho-primitivist-chronologydeep-ecology-chronologyecofeminist-chronologysocial-ecology-chronologyecosocialist-chronologyecoanarchist-chronologygreen-anarchist-chronologyanarcho-naturist-chronologyveganarchist-chronologytotal-liberation-chronologyintersectional-chronologydecolonial-chronologyindigenous-chronologypostcolonial-chronologysubaltern-chronologyfeminist-chronologyqueer-chronologycrip-chronologydisability-chronologyneurodiversity-chronologymad-chronologypsychiatric-survivor-chronologyantipsychiatry-chronologycritical-psychiatry-chronologypostpsychiatry-chronologytrauma-informed-chronologyhealing-centered-chronologyrestorative-justice-chronologytransformative-justice-chronologycommunity-accountability-chronologyabolition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hronologytype-XXVIII-S-C-mylonite-abuse-abolition-chronologytype-XXIX-S-C-mylonite-abuse-abolition-chronologytype-XXX-S-C-mylonite-abuse-abolition-chronologyEnaphalodes cortiphagus
Enaphalodes cortiphagus is a species of longhorned beetle in the family Cerambycidae, described by Craighead in 1923. It belongs to the tribe Elaphidiini and is considered rare in collections. The species has been documented at select locations in eastern North America, including Trail of Tears State Park in Missouri, where it occurs in mesic forest habitats with eastern tree species.
Epinotia medioviridana
Epinotia medioviridana is a poorly known tortricid moth described from Ottawa, Ontario in 1908. The species remained represented by very few specimens until 1951, when larvae were discovered on flowering raspberry (Rubus odoratus) in Quebec, providing the first documentation of its life history. Adults have been recorded from scattered localities in northeastern North America, but the species appears genuinely rare in collections.
Epipompilus aztecus
Epipompilus aztecus is a Neotropical spider wasp in the subfamily Ctenocerinae. It is naturally rare with low capture frequency despite extensive sampling effort. The species has been recorded using Malaise traps and Möerick traps (yellow and red). Its known distribution has expanded considerably in recent years through new records in South America and the United States.
Eucoloneura fragilis
Eucoloneura fragilis is a small bagworm moth species in the family Psychidae, described by Barnes and McDunnough in 1916. The species belongs to the subfamily Oiketicinae, which includes case-making moths whose larvae construct portable protective cases from silk and plant material. Very few observations of this species have been recorded, with only six documented occurrences in citizen science databases. The specific epithet 'fragilis' suggests delicate or fragile characteristics, though the precise basis for this name is not documented in available sources.
Eurylophella prudentalis
spiny crawler mayfly
Eurylophella prudentalis is a species of spiny crawler mayfly in the family Ephemerellidae, first described by James Halliday McDunnough in 1931. As a member of the genus Eurylophella, it belongs to a group of mayflies commonly known as spiny crawlers, characterized by their distinctive body armature. The species is known from North America, with documented occurrences in the northeastern United States including Vermont. Like other Ephemerellidae, it completes its aquatic larval development in freshwater habitats before emerging as a short-lived adult.