Subterranean
Guides
Acanthostichus
Acanthostichus is a genus of predatory, subterranean ants in the subfamily Dorylinae. The genus contains 24 described species distributed across the New World from the southern United States to northern Argentina. These ants are rarely encountered due to their underground lifestyle, and many species are known from very few specimens. Species identification relies heavily on petiole morphology.
Alloblackburneus troglodytes
Little Gopher Tortoise Scarab Beetle
Alloblackburneus troglodytes is a small scarab beetle in the family Scarabaeidae, subfamily Aphodiinae. Commonly known as the Little Gopher Tortoise Scarab Beetle, this species is associated with gopher tortoise burrows in the southeastern United States. The specific epithet "troglodytes" (meaning "cave-dweller") reflects its habit of living in the subterranean burrow systems of its reptilian host.
Amarochara
A genus of rove beetles (Staphylinidae: Aleocharinae: Oxypodini) established by C.G. Thomson in 1858. The genus comprises approximately 25 valid species distributed across the Holarctic region, with the majority described or redescribed in a comprehensive 2002 revision. Holarctic species are organized into five species groups based on phylogenetic analysis, replacing the previous subgeneric classification system.
Amarochara fenyesi
Fenyes's Minute Rove Beetle
A small rove beetle in the genus Amarochara, described by Blatchley in 1910. It is one of 25 valid species recognized in the Holarctic revision of the genus. The species belongs to a group characterized by specific morphological traits and shares the genus-wide trait of apparently utilizing subterranean habitats for reproduction and hibernation.
Amarochara forticornis
Amarochara forticornis is a rove beetle species in the tribe Oxypodini, originally described by Lacordaire in 1835. It is one of 25 valid species recognized in the Holarctic revision of the genus Amarochara. The species has undergone taxonomic clarification, with previous synonymies resolved. It is assigned to one of five species groups established for Holarctic representatives of the genus.
Amblyoponinae
Dracula ants, Vampire ants
Amblyoponinae is an ancient, relictual subfamily of ants characterized by specialized subterranean predatory habits and unique 'Dracula ant' behavior, in which adult workers pierce the integument of their own larvae to imbibe haemolymph. The subfamily contains 13 extant genera and originated in the mid-Cretaceous approximately 107 million years ago. Crown group diversification occurred in the Late Paleocene/Early Eocene. The subfamily exhibits remarkable morphological and behavioral diversity, including convergent evolution of army ant-like behaviors in some lineages and highly plastic caste systems in others.
Anemadini
Anemadini is a tribe of small carrion beetles within the subfamily Cholevinae (family Leiodidae). The tribe comprises at least 30 genera and more than 70 described species. Members exhibit diverse ecological adaptations, including forest-dwelling carrion feeders, cave inhabitants, and myrmecophiles living in ant nests. Some lineages show morphological modifications associated with subterranean life, such as reduced or absent eyes.
Anillina
A subtribe of minute ground beetles (Carabidae: Bembidiini) characterized by reduced eyes, elongated appendages, and adaptations for subterranean or cryptic habitats. Members exhibit convergent morphological traits associated with life in soil, leaf litter, or caves. The subtribe includes genera distributed across southern Gondwanan landmasses including New Zealand, Madagascar, and Australia, as well as the Northern Hemisphere.
Anillinus albrittonorum
Anillinus albrittonorum is a species of minute ground beetle described in 2021. It belongs to the tribe Anillini, a group of tiny, eyeless, wingless beetles adapted to subterranean or soil-dwelling habitats. The species was named in honor of the Albritton family. Like other members of its genus, it is presumed to inhabit deep soil and leaf litter layers.
Anillinus alleni
Anillinus alleni is a minute ground beetle species described in 2017 from the southeastern United States. As a member of the tribe Anillina within Carabidae, it belongs to a group of extremely small, eyeless or nearly eyeless beetles adapted to subterranean or deep soil habitats. The genus Anillinus comprises numerous species with limited distributions, many described only in recent decades as taxonomic attention has focused on this previously overlooked fauna.
Anillinus arenicollis
Anillinus arenicollis is a species of minute ground beetle in the family Carabidae. It belongs to a genus of small, often eyeless or reduced-eyed beetles adapted to subterranean or soil-dwelling habits. The species epithet 'arenicollis' suggests association with sandy habitats. Members of Anillinus are among the smallest carabid beetles and are poorly known due to their cryptic lifestyle.
Anillinus barberi
Anillinus barberi is a small carabid beetle in the tribe Bembidiini, described by Jeannel in 1963. It belongs to a genus of minute ground beetles characterized by reduced or absent eyes and elongated appendages adapted for subterranean life. The species is known from the United States and is part of a poorly studied group of beetles with limited published ecological data.
Anillinus chilhowee
Anillinus chilhowee is a small ground beetle (Carabidae) in the tribe Bembidiini, described by Sokolov in 2011. It belongs to the genus Anillinus, a group of minute, eyeless or nearly eyeless beetles adapted to subterranean or deep soil habitats. The species epithet references the Chilhowee region, likely indicating its type locality in the southeastern United States.
Anillinus choestoea
Anillinus choestoea is a small, eyeless ground beetle in the family Carabidae, described by Thomas C. Barr in 1962. It belongs to a genus of anilline beetles characterized by reduced eyes or complete anophthalmia, elongated bodies, and subterranean habits. The species is known from cave and deep soil habitats in the Appalachian region of the eastern United States. Like other members of Anillinus, it exhibits morphological adaptations for life in darkness, including depigmentation and elongated appendages.
Anillinus dentatus
Anillinus dentatus is a species of minute ground beetle in the family Carabidae. Members of the genus Anillinus are eyeless, subterranean beetles adapted to life in soil and cave environments. The specific epithet "dentatus" refers to toothed characteristics, likely of the mandibles or elytral margins. These beetles are part of the diverse North American cave beetle fauna, with species in this genus primarily distributed in the eastern and central United States.
Anillinus erwini
Anillinus erwini is a species of ground beetle in the family Carabidae, first described by Sokolov and Carlton in 2004. It is a member of the tribe Anillina, a group of small, often eyeless or reduced-eye beetles adapted to subterranean or cryptic habitats. The species is known from the United States and is part of a genus containing numerous species with limited distributions.
Anillinus jancae
Anillinus jancae is a small, eyeless ground beetle in the tribe Bembidiini. It was described by Thomas C. Barr in 1995 based on specimens from Kentucky. The species belongs to a genus of minute carabids adapted to subterranean or deep soil habitats. Like other Anillinus species, it exhibits troglomorphic traits including reduced pigmentation and vestigial eyes.
Anillinus kingi
Anillinus kingi is a species of minute ground beetle in the family Carabidae, described by Sokolov in 2012. The genus Anillinus comprises small, often eyeless or reduced-eyed beetles adapted to subterranean or hypogean habitats. Members of this genus are typically found in soil, leaf litter, or caves in North America. Anillinus kingi is known from the United States.
Anillinus magazinensis
Anillinus magazinensis is a small ground beetle in the family Carabidae, described in 2004 from specimens collected in Arkansas, USA. It belongs to the genus Anillinus, a group of minute, eyeless, wingless beetles adapted to subterranean or deep soil habitats. The species epithet refers to Magazine Mountain, the type locality in the Ozark Mountains.
Anillinus micamicus
Anillinus micamicus is a species of minute ground beetle in the tribe Anillini, subfamily Bembidiinae. Species in this genus are characterized by their extremely small size, reduced eyes, and subterranean or soil-dwelling habits. Anillinus micamicus was described from specimens collected in the southeastern United States. Like other anillines, it is presumed to inhabit deep soil and leaf litter layers, where it occupies a cryptic lifestyle with limited surface activity.
Anillinus moseleyae
Anillinus moseleyae is a small ground beetle described in 2004 from the southeastern United States. It belongs to the genus Anillinus, a group of minute, eyeless or reduced-eye beetles adapted to subterranean and soil-dwelling habitats. The species was named in honor of an individual (Moseley), following standard patronymic conventions. Like other members of the subtribe Anillina, it is presumed to inhabit deep soil, leaf litter, or cave-associated environments, though specific ecological details remain limited.
Anillinus murrayae
Anillinus murrayae is a small ground beetle in the family Carabidae, described by Sokolov and Carlton in 2004. It belongs to the genus Anillinus, a group of minute, eyeless or nearly eyeless beetles adapted to subterranean and soil-dwelling lifestyles. The species is known from the United States. Like other members of its genus, it likely inhabits deep soil and leaf litter layers in forested environments.
Anillinus pecki
Anillinus pecki is a species of small ground beetle in the family Carabidae, described by Giachino in 2011. It belongs to the subtribe Anillina, a group of minute carabid beetles often associated with subterranean or soil-dwelling habitats. The genus Anillinus is endemic to North America, with species distributed primarily in the eastern and central United States. Like other anillines, this species is likely eyeless or has highly reduced eyes and exhibits morphological adaptations for life in soil, leaf litter, or cave-like microhabitats.
Anillinus sinuaticollis
Anillinus sinuaticollis is a small ground beetle described by Jeannel in 1963. It belongs to the tribe Anillina within Carabidae, a group characterized by reduced or absent eyes and subterranean habits. The species is known from the United States, consistent with the broader North American distribution of the genus.
Anillinus tishechkini
Anillinus tishechkini is a small ground beetle species described in 2004 from the United States. It belongs to the tribe Anillina within Carabidae, a group characterized by reduced eyes and subterranean habits. The species is part of a genus containing numerous micro-endemic taxa in North America.
Anillinus unicoi
Anillinus unicoi is a small ground beetle species in the family Carabidae, described in 2011 from the Unicoi Mountains region of the southern Appalachians. It belongs to the genus Anillinus, a group of minute, eyeless or nearly eyeless beetles adapted to subterranean or deep soil habitats. The species epithet refers to the Unicoi Mountains, which span the Tennessee-North Carolina border. Like other anillines, it likely inhabits moist forest floor environments and exhibits reduced pigmentation and vision associated with life in dark microhabitats.
Anillinus virginiae
Anillinus virginiae is a species of ground beetle in the family Carabidae, described by Jeannel in 1963. It belongs to the genus Anillinus, a group of small, eyeless or reduced-eye beetles adapted to subterranean or cryptic habitats. The species is known from the United States, with the specific epithet suggesting a type locality in Virginia. Like other members of the subtribe Anillina, it is likely associated with soil and leaf litter environments.
Anoecia
Anoecia is a genus of root-feeding aphids in the subfamily Anoeciinae. Species are primarily subterranean, spending much of their life cycle underground on grass and sedge roots. The genus includes approximately 30 described species distributed across the Holarctic region. Several species exhibit complex life cycles involving migration between woody spring hosts (notably dogwood, Cornus) and herbaceous summer hosts.
Anoeciinae
Anoeciinae is a subfamily of root-feeding aphids within Aphididae. Members are obligate subterranean insects that live and feed on plant roots. The subfamily contains four genera, including two extinct fossil taxa from Baltic amber. Unlike many aphids, anoeciines do not alternate between hosts and remain underground throughout their life cycle.
Anoplotermes fumosus
Anoplotermes fumosus is a species of subterranean termite in the family Termitidae, subfamily Apicotermitinae. It is a Neotropical species with documented presence in Middle and North America. Like other members of the genus Anoplotermes, it lacks a soldier caste and relies on worker polymorphism for colony defense. The species was first described by Hagen in 1860.
Anthroleucosomatidae
Anthroleucosomatidae is a family of small to medium-sized millipedes in the order Chordeumatida, with approximately 19 genera and at least 40 described species. The family exhibits a core distribution centered on the Balkans and Caucasus region, extending eastward to Iran and central Siberia, with one highly disjunct North American species in Washington State. Many species are troglobionts (obligate cave-dwellers), including the world's deepest-occurring millipede, Heterocaucaseuma deprofundum, found below 2,000 meters in Krubera-Voronja Cave. The family shows exceptional diversity in the Caucasus, where 15 new genera and 36 new species were described in a single monograph.
Apamea niveivenosa
Snowy-veined Apamea Moth
Apamea niveivenosa, known as the snowy-veined apamea, is a noctuid moth native to northern North America. The species was first described by Grote in 1879. Its larvae are subterranean cutworms that feed on grasses and have been documented as pests of grain crops in interior North America. The species occurs across Canada and extends south to California.
Aploderus
Aploderus is a genus of rove beetles (Staphylinidae) in the subfamily Oxytelinae. First described by Stephens in 1833, it comprises small beetles with reduced eyes (microphthalmous) in several species. The genus is distributed across Europe, North America, and parts of Asia including Turkey and China. Several species have been described from subterranean or soil-associated habitats.
Arenivaga apacha
Apache sand cockroach, desert cockroach, sand cockroach
Arenivaga apacha, commonly known as the Apache sand cockroach, is a species of desert cockroach in the family Corydiidae. The genus Arenivaga was revised in 2014, revealing extensive cryptic diversity with 39 new species described. Like other Arenivaga species, A. apacha exhibits dramatic sexual dimorphism, with males possessing fully developed wings and females being wingless. This species inhabits arid regions of southwestern North America, including Arizona and California.
Arenivaga bolliana
Boll's sand cockroach, Boll's sandroach
Arenivaga bolliana is a species of desert cockroach in the family Corydiidae, native to North America. It belongs to a genus known for extreme sexual dimorphism, with females wingless and males fully winged. The species inhabits arid and sandy environments, reflecting the family's adaptation to harsh, dry habitats rather than the tropical moist conditions typically associated with cockroaches. Like other Arenivaga species, it is likely subterranean in habit and difficult to detect. The genus was revised in 2014, revealing substantial undescribed diversity, though A. bolliana itself was described in the 19th century.
Arenivaga gaiophanes
desert cockroach, sand cockroach
Arenivaga gaiophanes is a species of desert cockroach in the family Corydiidae, described by Heidi Hopkins in 2014 as part of a major revision of the genus Arenivaga. The genus Arenivaga, previously containing only nine species, was expanded to include 39 new species in this revision. Members of this genus inhabit harsh, arid environments and exhibit dramatic sexual dimorphism, with females appearing entirely different from males. The species epithet 'gaiophanes' derives from Greek roots meaning 'earth-revealing,' alluding to their subterranean habits.
Arenivaga genitalis
Arizona sand cockroach
Arenivaga genitalis, commonly known as the Arizona sand cockroach, is a species of desert-dwelling cockroach in the family Corydiidae. It is native to the southwestern United States, particularly Arizona and California. Like other members of its genus, it exhibits dramatic sexual dimorphism, with males and females differing substantially in appearance. The species inhabits harsh, arid environments and has adaptations allowing it to thrive in dry conditions atypical for most cockroaches.
Arenivaga hopkinsorum
desert cockroach, sand cockroach
Arenivaga hopkinsorum is a species of desert cockroach in the family Corydiidae, described by Heidi Hopkins in 2014 as part of a major revision of the genus Arenivaga. Like other Arenivaga species, it exhibits dramatic sexual dimorphism, with females appearing wingless and males possessing fully developed wings. The species inhabits arid environments in the southwestern United States and Mexico, where it contributes to decomposition despite limited plant matter. The specific epithet honors the Hopkins family, particularly referencing the author's father and brother.
Arenivaga investigata
desert cockroach
Arenivaga investigata, the desert cockroach, is a species in the family Corydiidae endemic to the Colorado Desert of California. It is notable for its ability to absorb water vapor from unsaturated air above 82.5% relative humidity, a physiological adaptation that allows survival in one of the most arid environments on Earth. The species exhibits extreme sexual dimorphism, with wingless females and fully winged males. It inhabits sand dunes and is primarily found in subsurface microhabitats where temperature and moisture conditions remain favorable.
Arenivaga sequoia
desert cockroach, sand cockroach
Arenivaga sequoia is a species of desert cockroach in the family Corydiidae, described by Heidi Hopkins in 2014 as part of a major revision of the genus Arenivaga. This species belongs to a group known for remarkable adaptations to harsh, arid environments. Like other Arenivaga species, it exhibits dramatic sexual dimorphism, with females appearing markedly different from males. The species was described based on male specimens, with species separation relying on complex genital characters. It is one of 39 new species discovered during Hopkins' four-year revision, which increased the genus from nine to 48 species.
Arenivaga tenax
desert cockroach, sand cockroach
Arenivaga tenax is a species of desert cockroach in the family Corydiidae, described by Heidi Hopkins in 2014 as part of a comprehensive revision of the genus Arenivaga. The genus was dramatically expanded from 9 to 48 species through this work, revealing extensive undiscovered diversity in arid-adapted cockroaches. Like other Arenivaga species, A. tenax exhibits extreme sexual dimorphism, with males and females appearing so different that associating specimens of the same species presents significant taxonomic challenges. The species is known from male specimens only, with species-level identification relying on complex genital characters.
Arenivaga tonkawa
tonkawa sand cockroach
Arenivaga tonkawa, the tonkawa sand cockroach, is a species of desert cockroach in the family Corydiidae. It occurs in Central America and North America, with records from Mexico, Oklahoma, and Texas. Like other Arenivaga species, it exhibits dramatic sexual dimorphism, with males and females differing substantially in appearance. The species belongs to a genus of sand cockroaches adapted to harsh, arid environments.
Aselloidea
Waterslaters and allies
Aselloidea is a superfamily of freshwater and subterranean isopods within the suborder Asellota. Members are primarily aquatic, with many lineages adapted to life in groundwater, caves, and karst systems. The superfamily includes families such as Asellidae (common freshwater isopods), Stenasellidae, and Atlantasellidae. Some representatives exhibit remarkable morphological specializations for subterranean existence, including reduced eyes and elongated appendages.
Asellota
Asellotes
Asellota is a suborder of isopod crustaceans comprising approximately one-quarter of all marine isopods. The group exhibits remarkable ecological diversity, occurring in marine, freshwater, and subterranean habitats from shallow coastal waters to abyssal depths, including hydrothermal vents. Members possess distinctive morphological specializations including a complex copulatory apparatus that distinguishes them from other isopods. The suborder has undergone multiple independent colonizations of deep-sea environments, with some lineages showing extensive radiation in these habitats.
Brachyceridae
Brachyceridae is a family of weevils (Coleoptera: Curculionoidea) containing at least 150 genera. The family has been treated historically as a subfamily of Curculionidae, but is now recognized as distinct. Some constituent genera, such as Absoloniella, contain blind, wingless species restricted to Mediterranean regions. The family belongs to the superfamily Curculionoidea, placing it among the true weevils.
Broscus
Broscus is a genus of ground beetles in the family Carabidae, tribe Broscini. The genus is native to the Palearctic, Nearctic, Near East, and North Africa. It contains approximately 25 described species, including several island endemics such as Broscus crassimargo on La Gomera (Canary Islands).
Caecidotea
Caecidotea is a genus of freshwater isopods in the family Asellidae, containing over 100 described species in North America. Species occupy diverse aquatic habitats including surface waters (ponds, streams) and subterranean environments (caves, aquifers). The genus has been extensively studied for parasite-host interactions, particularly involving acanthocephalan parasites that modify host behavior. Some species exhibit morphological adaptations to subterranean life including reduced eyes and pigmentation.
Caecidotea racovitzai racovitzai
Caecidotea racovitzai racovitzai is a subspecies of freshwater isopod in the family Asellidae. It was originally described as Asellus racovitzai racovitzai by Williams in 1970. The subspecies is known from Vermont, United States. As a member of the genus Caecidotea, it inhabits freshwater environments.
Callicerus
Callicerus is a genus of rove beetles (Staphylinidae: Aleocharinae) in the tribe Geostibini. The genus contains seven recognized species distributed across the Palaearctic region, particularly Europe. Species are notably rare to extremely rare in collections, with most records limited to scattered localities. Taxonomic revision in 2001 clarified species boundaries and synonymized several previously described taxa.
Cambarus tartarus
Oklahoma Cave Crayfish
Cambarus tartarus is a critically endangered cave-dwelling crayfish endemic to two caves in Delaware County, Oklahoma. Described in 1972, this species has one of the most restricted ranges of any North American crayfish. The IUCN assessed it as Critically Endangered in 2010, noting an extremely high risk of extinction in the immediate future due to its tiny geographic range and vulnerability to groundwater contamination.