Ground-beetles
Guides
Leptotrachelus
Leptotrachelus is a genus of ground beetles (Carabidae) in the tribe Ctenodactylini, subfamily Ctenodactylinae. The genus contains more than 30 described species distributed primarily in tropical and subtropical regions. Members of this genus are characterized by their elongated body form and are part of the diverse ground beetle fauna that function as predators in soil and leaf litter habitats.
Licinini
Licinini is a tribe of ground beetles within the family Carabidae, containing over 20 genera and approximately 240 described species. Members are classified in the subfamily Licininae. The tribe includes the genus Diplocheila, which has been studied in North America. Species within this tribe occur across multiple continents including Asia, Europe, and North America.
Loricerinae
Loricerinae is a subfamily of ground beetles in Carabidae, established by Bonelli in 1810. It is monogeneric, containing only the genus Loricera. These beetles are recognized for their distinctive flattened, shield-like body form and association with moist habitats. The subfamily is relatively small in species diversity but has a broad geographic distribution.
Loricerini
Loricerini is a tribe of ground beetles in the family Carabidae, belonging to the subfamily Loricerinae. Members of this tribe are characterized by their distinctive body form and are found in specific habitat types. The tribe contains the genus *Loricera*, which includes species adapted to particular ecological niches. These beetles are part of the diverse ground beetle fauna and contribute to soil and litter ecosystem processes.
Medusapyga
Medusapyga is a genus of ground beetles in the family Carabidae, described in 2023 by LaBonte and Maddison. It is a recently established taxon, and its species-level composition and biological characteristics remain to be fully documented. The genus belongs to the diverse beetle order Coleoptera and the suborder Adephaga, which includes most predatory beetle lineages. As a newly described genus, detailed natural history information is currently limited.
Metriini
Ant nest beetles
Metriini is a small tribe of ground beetles in the subfamily Paussinae, commonly known as ant nest beetles. The tribe contains at least three genera and approximately six described species. Members are found in North America and China, with one extinct genus known from Burmese amber. These beetles are associated with ant colonies, though specific ecological details remain limited.
Micrixys
Micrixys is a genus of ground beetles in the family Carabidae, subfamily Panagaeinae. The genus was described by LeConte in 1854 and contains at least two recognized species: Micrixys distincta from the United States and Micrixys mexicana from Mexico. These beetles belong to the tribe Panagaeini and are part of the diverse North American carabid fauna.
Mioptachys
Mioptachys is a genus of ground beetles in the family Carabidae, described by Bates in 1882. The genus contains 13 described species distributed across the Americas, from the United States through Central America and into South America. Species in this genus are small carabids, with several exhibiting notable morphological adaptations including reduced or absent eyes in some taxa. The genus is classified within the subtribe Xystosomina of the tribe Bembidiini.
Morion
Morion is a genus of ground beetles in the family Carabidae, tribe Morionini. Established by Latreille in 1810, this genus contains multiple species distributed across various regions. Members of this genus are part of the subfamily Pterostichinae, a diverse group of carabid beetles.
Morionini
Morionini is a tribe of ground beetles (Carabidae) in the subfamily Pterostichinae, established by Brullé in 1837. The tribe is represented in the Western Hemisphere by at least two genera, including the Neotropical genus Moriosomus. Members of this tribe are primarily associated with forest habitats, particularly under bark and in decaying wood. The tribe's classification and generic composition have been subject to taxonomic revision, with ongoing work to clarify species boundaries and geographic distributions.
Nebria
Gazelle Beetles
Nebria is a large genus of ground beetles (Carabidae) comprising over 500 described species distributed across the Palearctic, Near East, and North Africa. Members are commonly known as Gazelle Beetles. The genus exhibits notable diversity in alpine and montane habitats, with many species showing flightlessness and narrow endemic ranges. Species-level taxonomy relies heavily on male genitalia morphology and geometric morphometrics of external features such as the pronotum.
Nebriinae
Nebriinae is a subfamily of ground beetles (Carabidae) established by Laporte in 1834, containing approximately 12 genera and more than 840 described species. The group is distributed across the Palaearctic region, with significant diversity in mountainous areas of Europe including the Carpathians, Balkans, and other ranges. Species are often associated with montane and submontane habitats, though some occur in lowland meadow-steppe environments. The genus Nebria is the most species-rich and well-studied within the subfamily.
Nelsonites
Nelsonites is a genus of ground beetles in the family Carabidae, established by Valentine in 1952. The genus contains two described species: Nelsonites jonesei and Nelsonites walteri. Both species are known from the United States. The genus belongs to the tribe Trechini within the subfamily Trechinae.
Nippononebria
Nippononebria is a genus of ground beetles (Carabidae) comprising approximately eight described species. The genus exhibits a disjunct distribution with species in Japan, China, and western North America. North American lineages have undergone rapid speciation within the last million years, accompanied by ecological divergence into alpine habitats and convergent shifts in body shape and thermal tolerance.
Nothoderis
Nothoderis is a genus of ground beetles (Carabidae) described in 2016 by Boyd and Erwin. It belongs to the tribe Bembidiini within the subfamily Trechinae. The genus is part of the diverse ground beetle fauna, with very few documented observations. As a recently described genus, its species composition and biology remain poorly documented.
Notiobia
Notiobia is a genus of ground beetles in the family Carabidae, comprising at least 100 species. The genus was established by Perty in 1830 and is classified within the tribe Anisodactylini. Brazilian species belong to at least three distinct species groups distributed from Brazil through northwestern South America and Central America to Mexico. At least one species, Notiobia nebrioides, has been documented as a member of the seed-feeding guild at fruit falls in Amazonian rainforest.
Odacanthini
Odacanthini is a tribe of ground beetles in the family Carabidae, comprising more than 40 genera and over 680 described species. The tribe exhibits broad geographic distribution across tropical and subtropical regions including the Americas, Africa, Asia, and the Pacific. Several genera within Odacanthini, such as Colliuris, Ophionea, and Dobodura, have been subject to recent taxonomic revision due to their morphological diversity and complex species boundaries.
Omophron
Round sand beetles
Omophron is a genus of ground beetles (Carabidae) and the sole extant genus in the subfamily Omophroninae. It is widely distributed across the Northern Hemisphere with southern limits extending to Guatemala and Hispaniola in the Americas, South Africa and Madagascar in Africa, and Malaysia and the Philippines in Asia. The genus includes multiple subgenera, with taxonomic revisions documenting substantial species diversity in the Afrotropical region.
Oodes
Oodes is a genus of ground beetles (Carabidae) in the tribe Oodini. The genus has undergone significant taxonomic revision, with many species formerly classified in Oodes now placed in three new genera: Pseudoodes, Sundaoodes, and Nothoodes. The genus currently comprises seven recognized species, with five in Oodes s.str. and two in the subgenus Lachnocrepis. Oodes species are distributed across the Palaearctic and Oriental regions.
Oodini
Oodini is a tribe of ground beetles (Carabidae: Harpalinae) containing over 400 species in 43 genera, with highest diversity in tropical Africa. Members are generally associated with standing water habitats. The tribe is distinguished by two diagnostic morphological characters: a laterally coadunate metepisternum and an elytral ridge formed by fusion of elytral intervals 7 and 8.
Oodinus
Oodinus is a genus of ground beetles in the family Carabidae, subfamily Licininae. The genus was established by Motschulsky in 1865 and contains at least ten described species distributed primarily in the Neotropical region. Species within this genus are small to medium-sized carabids with limited available ecological documentation.
Osorius
unmargined rove beetles
Osorius is a genus of unmargined rove beetles in the family Staphylinidae, first described by Guérin-Méneville in 1829. The genus contains approximately nine described species distributed primarily in North America. Members of Osorius are characterized by the absence of lateral margins on the elytra, a trait that distinguishes them within the subfamily Osoriinae. These beetles are ground-dwelling and associated with moist, decaying organic matter.
Oxydrepanus
Oxydrepanus is a genus of ground beetles in the family Carabidae, tribe Clivinini, subtribe Reicheiina. The genus was established by Putzeys in 1867 and contains approximately 17 described species distributed across the Americas, with records from Brazil, Mexico, Cuba, and other regions. Species are small to minute in size and have been documented from the mid-19th century to recent descriptions in 2018. The genus is taxonomically placed within the diverse carabid subfamily Scaritinae, which includes many soil-dwelling beetles.
Oxypselaphus
Oxypselaphus is a genus of ground beetles in the family Carabidae, established by Chaudoir in 1843. The genus comprises four recognized species distributed across the Northern Hemisphere, including Europe and North America. Members of this genus are classified within the subfamily Platyninae, tribe Platynini. The genus includes both Palearctic and Nearctic species, with O. obscurus being the most widespread and historically documented species.
Ozaena
ozaena beetles
Ozaena is a genus of ground beetles in the family Carabidae, subfamily Paussinae. These beetles belong to the tribe Ozaenini, which includes species with specialized morphological adaptations. Members of this genus are rarely encountered, with limited observational records. The genus has been documented since the early 19th century, with Olivier establishing the taxon in 1812.
Panagaeus
Holy Ground Beetles
Panagaeus is a genus of ground beetles (Carabidae) comprising approximately 15 described species. The genus has a broad geographic distribution spanning the Holarctic, Near East, North Africa, Central America, and South America. Species within this genus are commonly referred to as "Holy Ground Beetles" due to distinctive markings on the elytra that resemble crosses or other symbolic patterns. The genus was established by Latreille in 1802 and belongs to the subfamily Panagaeinae.
Paradromius
Paradromius is a genus of ground beetles (family Carabidae) comprising more than 20 described species. The genus was established by Fowler in 1887 and is classified within the subfamily Lebiinae, tribe Lebiini. Species occur across North Africa, the Palearctic, and the Middle East, with notable diversity on the Canary Islands and in Morocco.
Patrobina
Patrobina is a subtribe of ground beetles (Carabidae) within the tribe Patrobini, established by Kirby in 1837. Members of this subtribe are small to medium-sized beetles associated with moist, often riparian or wetland habitats. The subtribe includes genera such as Patrobus and others, though the precise generic composition has been subject to taxonomic revision. Patrobina beetles are part of the diverse carabid fauna that contributes to predatory control of invertebrate populations in temperate ecosystems.
Patrobini
Patrobini is a tribe of ground beetles (Carabidae) established by Kirby in 1837. Members include subtribe Deltomerodina, which contains genera such as Deltomerodes characterized by slender medium-sized bodies (8.5–12.0 mm), dorsally pubescent tarsi, and distinctive genitalia morphology. The tribe occurs in alpine and high-elevation habitats across the Himalayas and adjacent regions.
Pelmatellus
Pelmatellus is a genus of ground beetles in the family Carabidae, established by Henry Walter Bates in 1882. The genus contains at least 20 described species and is the type genus of the tribe Pelmatellini within the subfamily Harpalinae. As with other ground beetles, species in this genus are likely predatory, though specific ecological details remain poorly documented.
Pelophila
Pelophila is a genus of ground beetles in the family Carabidae, subfamily Nebriinae, and tribe Pelophilini. The genus contains two described species: Pelophila borealis (Paykull, 1790) and Pelophila rudis (LeConte, 1863). Members of this genus are associated with northern and montane habitats.
Pelophilini
Pelophilini is a small tribe of ground beetles (Carabidae) in the subfamily Nebriinae, established by Kavanaugh in 1996. The tribe contains a single genus, Pelophila, with species distributed in cool, moist habitats across the Northern Hemisphere. Members are characterized by adaptations to riparian and shoreline environments.
Pentagonicini
Pentagonicini is a small tribe of ground beetles in the family Carabidae. It contains approximately 10 described species in at least one genus. Members of this tribe are part of the diverse ground beetle fauna found across various regions. The tribe is poorly documented in scientific literature compared to many other carabid tribes.
Pericalina
Pericalina is a subtribe of ground beetles (Carabidae: Lebiinae: Lebiini) comprising arboreal species distributed across tropical and subtropical forests of the New World and Asia. The subtribe includes several complexes distinguished by morphological characters of the mouthparts, pronotum, and ovipositor. New World eucheiloid members are characterized by securiform labial palpomere 3, serrate-setose pronotal margins, and flattened stylomere 2 of the ovipositor. Asian members such as Pericalus exhibit flattened body forms adapted for life under bark. The group has undergone significant diversification in tropical South America with subsequent northward dispersal into Central America and independent radiations in Asia.
Perigona
Perigona is a genus of ground beetles (Carabidae) comprising more than 170 described species. Members of this genus are distributed across multiple continents, with records from Europe, North America, and Africa. The genus is taxonomically complex, with numerous subgenera recognized including Cryptoperigona, Euripogena, Euryperigona, Neoperigona, Perigona, Perigonillus, Ripogena, Trechicus, Typhlonestra, Xenogona, and Xenogonilla.
Perigonini
Perigonini is a tribe of small ground beetles within the subfamily Lebiinae of Carabidae. The tribe contains four genera—Perigona, Diploharpus, Mizotrechus, and Ripogenites—and more than 200 described species. Members are primarily distributed in tropical and subtropical regions worldwide. The tribe was established by G.Horn in 1881.
Philophuga
Philophuga is a genus of ground beetles in the family Carabidae, established by Motschulsky in 1859. The genus contains approximately five described species distributed in the Americas, including Philophuga viridis and Philophuga amoena. Members belong to the subfamily Lebiinae, tribe Lebiini. Species are primarily documented from North and Central America.
Physea
Physea is a genus of ground beetles (Carabidae) established by Brullé in 1835. It belongs to the subfamily Paussinae and tribe Ozaenini, a group known for specialized morphological adaptations. The genus contains five described species distributed in the Americas. Members of Ozaenini, including Physea, are often associated with ant colonies or termite nests, though specific ecological details for Physea remain poorly documented.
Platidiolus
Platidiolus is a genus of ground beetles in the family Carabidae, established by Chaudoir in 1878. The genus contains five described species, four of which are endemic to Russia and one to North America. Species were described between 1878 and 2001.
Platynini
Platynini is a large tribe of ground beetles (Carabidae) comprising at least 190 genera and approximately 3000 described species. Members occupy diverse habitats including temperate forests, alpine zones, wetlands, and subterranean environments. Several genera contain highly modified cave-adapted (troglobitic) species with reduced eyes and elongated appendages. The tribe has a broad geographic distribution spanning Europe, Asia, and the Americas.
Platynus
Platynus is a genus of ground beetles in the family Carabidae containing over 180 described species. Species in this genus are primarily nocturnal predators with well-developed olfactory capabilities. The genus has been extensively studied in ecotoxicological research due to its role as a beneficial predatory insect in agricultural ecosystems. Several species have been used as model organisms to assess sublethal effects of insecticides on non-target beneficial arthropods.
Plochionus
Plochionus is a genus of ground beetles in the family Carabidae, established by Dejean in 1821. The genus contains approximately 18 described species. Members are classified within the subfamily Lebiinae and tribe Lebiini. At least one species, P. timidus, has been documented as a predator of agricultural pest insects in North American wetland and orchard systems.
Pogonini
Pogonini is a tribe of ground beetles (Carabidae: Trechinae) comprising approximately 12 genera and more than 80 described species, with the genus Pogonus containing over half of all species. Members are strongly associated with saline environments, occurring in inland salt flats and along ocean coastlines. The tribe shows strong geographic regionalization, with distinct faunas in the New World (8 recognized species) and the Ibero-Balearic region (11 species across 3 genera).
Pogonodaptus
Pogonodaptus is a genus of ground beetles in the family Carabidae, tribe Stenolophini. The genus was established by G. Horn in 1881 and contains two described species: Pogonodaptus mexicanus (Bates, 1878) and Pogonodaptus rostratus Darlington, 1935. Members of this genus occur in the Neotropical region.
Pogonus
Pogonus is a genus of ground beetles (family Carabidae) comprising over 50 described species with a worldwide distribution. The genus is classified within the tribe Pogonini and subfamily Trechinae. At least one species, Pogonus chalceus, has been studied for genetic differentiation and local adaptation in salt-marsh environments. The genus shows genetic population structure across geographic regions, with evidence of adaptive divergence between habitats.
Polpochila
Polpochila is a genus of ground beetles in the family Carabidae, tribe Stenolophini. The genus contains approximately 24 described species distributed primarily in the Americas. It was established by Solier in 1849. Species in this genus are small to medium-sized carabid beetles.
Polyderidius
Polyderidius is a genus of ground beetles in the family Carabidae, tribe Bembidiini. It was described by Jeannel in 1962. Members of this genus are part of the diverse tachyine lineage, which includes many small, fast-running beetles. The genus appears to be poorly studied, with limited published information on its species composition and biology.
Polyderis
Polyderis is a subgenus of ground beetles within the genus Tachys, family Carabidae. Established by Motschulsky in 1862, it is classified within the tribe Bembidiini and subtribe Tachyina. The subgenus is part of a diverse group of small carabid beetles.
Pseudomorpha
Western False-form Beetles
Pseudomorpha is a genus of ground beetles in the family Carabidae, subfamily Pseudomorphinae. The genus contains 35 described species distributed across North, Central, and South America. Members are commonly known as Western False-form Beetles. The genus was established by William Kirby in 1823.
Pterostichini
Woodland Ground Beetles
Pterostichini is a tribe of ground beetles in the subfamily Harpalinae, commonly known as woodland ground beetles. The tribe contains approximately 180 genera and over 3,800 described species, though estimates vary. Members are primarily ground-dwelling beetles with diverse ecological roles as predators. Research on certain genera, particularly Pterostichus, has revealed complex life history patterns including iteroparity, flexible breeding periods, and responses to environmental conditions such as drought.