Desert-fauna
Guides
Pogonomyrmex
Typical American Harvester Ants, Harvester Ants
Pogonomyrmex is a genus of harvester ants comprising approximately 69 extant species, distributed primarily across arid and semi-arid regions of North, Central, and South America, with three endemic species from Haiti. These ants are characterized by their specialized seed-collecting behavior, constructing deep underground nests with conspicuous cleared nest disks that can exceed 10 meters in diameter. Workers of the subgenus sensu stricto possess a psammophore—a beard-like structure of long hairs beneath the head used for transporting seeds, sand, and eggs. The genus includes species with the most toxic insect venom documented, notably Pogonomyrmex maricopa, with an LD50 of 0.12 mg/kg in mice.
Pogonomyrmex hoelldobleri
Hoelldobler's Harvester Ant
Pogonomyrmex hoelldobleri is a seed-harvesting ant species described in 2013 from the Mohave and Sonoran Deserts of North America. It was previously confused with P. magnacanthus but differs in having normally sized eyes, cephalic rugae that converge posterior to the eyes near the vertex, mandibles with seven teeth, and moderately to strongly granulate interrugal spaces on pronotal sides. Molecular phylogenetic analysis supports its close relationship with P. magnacanthus and P. mohavensis within the P. californicus species group.
Prodoxinae
Yucca Moths
Prodoxinae is a subfamily of small moths within the family Prodoxidae, commonly known as yucca moths. This group is best known for the obligate mutualism between yucca moths (genus Tegeticula) and their host plants in the genus Yucca. The moths are the sole pollinators of yucca flowers, while the developing seeds serve as the exclusive food source for moth larvae. This coevolutionary relationship represents one of the classic examples of obligate mutualism in insects.
Prodoxus
Bogus Yucca Moths
Prodoxus is a genus of moths in the family Prodoxidae comprising approximately 22 species, commonly known as bogus yucca moths. Unlike their pollinating relatives in the genus Tegeticula, Prodoxus species are non-pollinating yucca moths that exploit yucca plants as hosts without providing mutualistic services. The genus exhibits diverse feeding specializations, with larvae feeding on yucca flowering stalks, fruits, or leaves depending on the species. Host-associated divergence and incipient speciation have been documented, with specialization closely tied to host plant shifts.
Prodoxus quinquepunctella
Five-spotted Bogus Yucca Moth
Prodoxus quinquepunctella is a small moth in the family Prodoxidae, commonly known as the Five-spotted Bogus Yucca Moth. Unlike true yucca moths (Tegeticula), it does not pollinate yucca plants but is an obligate herbivore on yucca. Its range spans from southern Alberta, Canada, to the Mexican Plateau in northern Mexico. The species has been documented in diverse habitats including desert, grassland, and forest openings.
Prodoxus y-inversus
Prodoxus y-inversus is a small yucca moth in the family Prodoxidae, restricted to the southwestern United States. Adults are active in spring and possess a wingspan of 11–16 mm. The species is intimately associated with Yucca baccata and Yucca schottii, on which its larvae feed.
Pseudomethia arida
Pseudomethia arida is a species of longhorn beetle in the family Cerambycidae. It is the sole member of its genus, Pseudomethia. The species was described by Linsley in 1937 and is found in arid regions of the southwestern United States and northwestern Mexico.
Pseudoschinia
Pseudoschinia is a monotypic genus of crambid moths established by Munroe in 1961. The sole species, Pseudoschinia elautalis, is a specialist herbivore of cacti in the southwestern United States and northern Mexico. Adults are small moths with distinctive pale yellow forewings and white hindwings. The genus is notable for its narrow ecological association with columnar and cholla cacti.
Pterotermes
Pterotermes is a monotypic genus of drywood termites in the family Kalotermitidae, containing only Pterotermes occidentis. This primitive termite is the largest drywood termite in the southwestern United States deserts and exhibits the simple life cycle characteristic of its family, lacking a true worker caste. Colonies develop entirely within a single piece of timber, making it a cryptic inhabitant of dead desert wood.
Pyrota lineata
Yellow-lined Pyrota
Pyrota lineata is a blister beetle in the family Meloidae, tribe Pyrotini. It is characterized by yellow longitudinal stripes on dark elytra and is found in western North America. The species is documented in museum collections and has been observed in multiple localities. Like other Pyrota species, it exhibits the typical meloid soft-bodied form and elytra that do not fully cover the abdomen.
Rhachocnemis
sand-treader crickets
Rhachocnemis is a genus of sand-treader crickets in the family Rhaphidophoridae. The genus was described by Caudell in 1916 and contains one described species, R. validus. These crickets are adapted to sandy desert environments, where they burrow through loose substrate. They are part of the diverse camel cricket lineage, though specialized for psammophilic (sand-dwelling) habitats.
Sagenosoma elsa
Elsa Sphinx, elsa sphinx moth
Sagenosoma elsa is a monotypic species of sphinx moth in the family Sphingidae, known as the Elsa Sphinx. It is the sole member of its genus and occurs in the southwestern United States and northern Mexico. The species was first described by Strecker in 1878 under the name Sphinx elsa. Like other sphingid moths, adults are likely capable of sustained hovering flight and rapid, agile movement.
Sapotes longipilis
Sapotes longipilis is a broad-nosed weevil in the family Curculionidae, described by Van Dyke in 1934. It is a member of the subfamily Entiminae and tribe Ophryastini. The species is known from arid regions of the southwestern United States.
Schinia deserticola
A small noctuid moth of western North American deserts, formerly treated as a subspecies of Schinia cupes. Adults have a wingspan of 22–28 mm. The species is closely tied to its larval host plant Camissonia claviformis, with adults typically found resting on or near the flowers.
Sphaenothecus
Sphaenothecus is a genus of longhorn beetles (family Cerambycidae) in the tribe Trachyderini. The genus was established by Dupont in 1838 and contains seven recognized species distributed in North and Central America. Members of this genus are associated with flowering plants in arid and semi-arid regions. The genus is part of the diverse cerambycid fauna of the southwestern United States and Mexico.
Sphecius convallis
Pacific cicada killer, Pacific cicada-killer wasp
Sphecius convallis, the Pacific cicada killer, is a large solitary wasp in the family Crabronidae. Females hunt cicadas, paralyze them with venom, and transport them to underground burrows as food for their larvae. The species occurs in arid and semi-arid regions west of the 100th meridian in North America, with populations studied intensively in Arizona mine tailings. Research has documented complex behavioral ecology including kleptoparasitism, thermal regulation strategies, and sex-specific provisioning behaviors.
Stenotothorax parapyriformis
Stenotothorax parapyriformis is a species of dung beetle in the family Scarabaeidae, subfamily Aphodiinae. It was described from specimens collected in the western United States. The species name refers to its pear-like (pyriform) body shape, similar to but distinct from related species. It belongs to a genus of small aphodiine dung beetles.
Stictiellina
Stictiellina is a subtribe of sand wasps in the family Crabronidae, containing at least 60 described species distributed across six genera. These wasps are solitary, ground-nesting predators that provision their burrows with paralyzed flies for their larval offspring. Members are known for their elongated mouthparts adapted for nectar feeding and are often observed visiting flowers. The subtribe was established by Bohart and Horning in 1971.
Stiria
Stiria is a genus of moths in the family Noctuidae, established by Augustus Radcliffe Grote in 1874. It comprises approximately 15 described species distributed primarily across western North America and Mexico, with one species extending into eastern North America. The genus belongs to the subfamily Stiriinae and is characterized by features typical of this group. Species occupy diverse habitats ranging from desert regions to montane environments.
Stiriinae
owlet moths
Stiriinae is a subfamily of owlet moths (Noctuidae) comprising approximately 160 described species across more than 20 genera. The group underwent significant taxonomic revision in 2019–2021 based on phylogenetic research, with the former tribe Stiriini elevated to subfamily status and internal classification reorganized into two tribes: Stiriini and Annaphilini. The subfamily exhibits exceptional host plant specialization, with many species feeding on a single Asteraceae species.
Syspira
prowling spiders
Syspira is a genus of prowling spiders in the family Miturgidae, first described by Simon in 1895. These active, nocturnal hunters are characterized by their leggy appearance and body lengths of 10–18 mm. The genus occurs in arid and semi-arid regions of the southwestern United States, Mexico, and the Caribbean, with highest diversity in western North America. Taxonomic revision is ongoing, with species historically placed in Clubionidae and some specimens of S. pallida potentially belonging to the unrelated genus Zorocrates.
Talanites
Talanites is a genus of ground spiders in the family Gnaphosidae, established by Eugène Simon in 1893. The genus contains fifteen described species distributed across arid and semi-arid regions of North America, the Mediterranean, Central Asia, and South Asia. Members are ground-dwelling hunters with a flattened body form typical of the family. The genus shows a disjunct distribution pattern with species in both the New World and Old World.
Tarache geminocula
Tarache geminocula is a moth of the family Noctuidae, subfamily Acontiinae. It was first described by Clifford D. Ferris and J. Donald Lafontaine in 2009. The species occurs in the southwestern United States and northern Mexico, with adults active during the late summer months. Males have forewings measuring 10–11 mm, while females are slightly larger at 10–12 mm.
Thyreodon apricus
Thyreodon apricus is a species of ichneumon wasp in the subfamily Ophioninae, described by Porter in 1984. The genus Thyreodon belongs to the tribe Enicospilini, a group of primarily tropical wasps. Members of Ophioninae are known for their ability to sting using their short, sharp ovipositors for defense. This species occurs in the southwestern United States and Mexico. Very little is known about its specific biology, and it has been subject to taxonomic confusion with similar large, colorful ichneumon wasps.
Thyridanthrax selene
Thyridanthrax selene is a bee fly species in the family Bombyliidae. It occurs in the southwestern United States and northwestern Mexico. The genus Thyridanthrax includes species that are parasitoids of solitary wasps, with females observed hovering over open wasp nests and depositing eggs into burrows. Limited observational records exist for this species.
Ticida miracula
Ticida miracula is a planthopper species in the family Dictyopharidae, first described by Ball in 1909. It is known from arid regions of the southwestern United States and northwestern Mexico. Like other dictyopharids, it possesses an elongated head projection. The species has been recorded from Arizona, California, and Baja California.
Townsendiella
Townsendiella is a genus of cuckoo bees in the family Apidae, established by Crawford in 1916. The genus contains four described species found in arid regions of western North America. As cleptoparasitic bees, females lay eggs in the nests of other bee species, with their larvae consuming the host's food stores. Townsendiella is the sole genus in the tribe Townsendiellini.
Tragidion
Tragidion is a genus of longhorn beetles (Cerambycidae) distributed across North America and Mexico. Species are notable for their bright orange-red and black coloration, which functions in Batesian mimicry of tarantula hawk wasps (Pompilidae: Pepsis, Hemipepsis). The genus contains eleven recognized species, with seven occurring in North America and four restricted to Mexico. Taxonomic clarity was recently provided by Swift & Ray (2008), who described two new species, revalidated one from synonymy, and proposed four new synonymies to resolve long-standing identification challenges.
Triscolia ardens
Fire-tailed Scoliid Wasp
Triscolia ardens is a large scoliid wasp and the sole member of its genus occurring in North America north of Mexico. Females are robust with short antennae and hunt subterranean scarab beetle grubs as hosts for their larvae. Males possess long antennae and a distinctive three-pronged pseudosting at the abdomen tip. The species is recognized by its black integument and setae on the head and first two gaster segments, with the remainder of the gaster bright red.
Tylocentrus quadricornis
Tylocentrus quadricornis is a treehopper species in the family Membracidae, subfamily Centrotinae, described by Funkhouser in 1919. It belongs to the tribe Platycentrini, characterized by exposed scutella and relatively unmodified pronota compared to other membracid subfamilies. The species is distributed across the southwestern United States and northwestern Mexico. Like other members of its genus, it exhibits the primitive centrotine body plan with reduced pronotal ornamentation.
Tylosis
Tylosis is a genus of longhorn beetles (Cerambycidae) in the tribe Trachyderini. Species are characterized by bold red and black coloration, robust bodies, and relatively long antennae. The genus contains species such as Tylosis maculatus and Tylosis jiminezi, which are found in arid and semi-arid regions of western North America. Adults are active during late summer and fall, often associated with flowering host plants.
Xanthothrix
Xanthothrix is a genus of owlet moths in the family Noctuidae, erected by Henry Edwards in 1878. The genus contains four described species distributed across western North America and the eastern Mediterranean region. Two species are endemic to California, with one restricted to the Mojave Desert. The genus belongs to the subfamily Stiriinae, a group of generally small, often boldly patterned noctuid moths.
Xerochlora
Xerochlora is a genus of emerald moths in the family Geometridae, erected by Ferguson in 1969. The genus contains five described species, all restricted to North America with distributions centered in the southwestern United States and extending into Mexico and Central America. Most species show strong affinities for arid and semi-arid regions. The genus is classified within the subfamily Geometrinae, commonly known as the emerald moths.