Minute
Guides
Acritus acaroides
Acritus acaroides is a minute clown beetle (family Histeridae) in the tribe Acritini. It is one of the smallest members of its family, measuring 0.9–1.1 mm in length, with exceptional individuals rarely reaching 2 mm. The species is known from a restricted range in the southeastern United States. Like other histerid beetles, it likely occupies microhabitats associated with decaying organic matter.
Anapistula
Anapistula is a genus of minute araneomorph spiders in the family Symphytognathidae, established by Gertsch in 1941. The genus comprises 28 described species distributed across tropical and subtropical regions of Asia, South America, and Europe. Members exhibit diverse habitat preferences: approximately 18 species occur in leaf litter, soil, and mosses, while seven are obligate cave-dwellers (troglobites) and one inhabits cave entrances. The genus includes some of the smallest spiders known, with A. ataecina from Portugal representing both the first European record of the family and one of the smallest described spider species.
Attidops cinctipes
A minute jumping spider in the family Salticidae, measuring 2–3 mm at maturity. The species name refers to its banded legs. It occurs in the United States and Mexico around the Gulf of Mexico, where it inhabits trees and woody surfaces. Its coloration provides camouflage against bark.
Basalys
Basalys is a genus of minute parasitoid wasps in the family Diapriidae. Members are among the smallest known insects, with some species measuring less than 0.5 mm in body length. These wasps are internal parasitoids of dipteran larvae, particularly those developing in decaying organic matter. The genus has a Holarctic distribution with confirmed records from Scandinavia and other northern European regions.
Blacini
Blacini is a tribe of braconid parasitoid wasps within the subfamily Brachistinae. Members are minute, dark-colored wasps with distinctive non-cyclostome mouthparts and a carina along the posterior head margin. The tribe was elevated from subfamily status in 2011 based on molecular phylogenetic evidence. The genus Blacus dominates the tribe with approximately 40 described New World species and cosmopolitan distribution, while remaining genera are largely restricted to South and Central America.
Cartodere nodifer
Swollen Fungus Beetle, minute brown scavenger beetle
Cartodere nodifer is a minute beetle in the family Latridiidae, commonly known as the Swollen Fungus Beetle. The species was originally described from Europe but has become cosmopolitan through human-mediated dispersal. It is now established on multiple continents including Australia, New Zealand, and the Azores archipelago. The species belongs to a group commonly called 'minute brown scavenger beetles' due to their small size and ecological habits.
Ceutorhynchus pusillus
minute seed weevil
Ceutorhynchus pusillus is a minute seed weevil in the family Curculionidae. It was described by LeConte in 1876. The species is known from North America.
Crematogaster minutissima
Forest Floor Yellow Acrobat Ant
Crematogaster minutissima is a small ant species in the genus Crematogaster, commonly known as the Forest Floor Yellow Acrobat Ant. The species is characterized by its diminutive size and yellowish coloration. It belongs to a genus notable for its heart-shaped gaster and defensive 'acrobatic' stinging posture, though specific behavioral documentation for this species is limited.
Dipsocoromorpha
minute litter bugs
Dipsocoromorpha is an infraorder of minute true bugs within Heteroptera, containing approximately 300 species in one superfamily (Dipsocoroidea). Members are among the smallest adult true bugs, typically 0.5–4.0 mm in length. The group exhibits highest diversity in tropical regions, with many species remaining undescribed due to their cryptic habits and small size.
Euconnus rasus
Euconnus rasus is a minute rove beetle in the subfamily Scydmaeninae, first described by John Lawrence LeConte in 1852. Members of this genus are among the smallest beetles, typically measuring under 2 mm. The species has been recorded across northeastern North America, with scattered observations in the Great Lakes region and Atlantic coastal states. Like other scydmaenines, it likely inhabits leaf litter and other decaying organic matter, though specific ecological details remain poorly documented.
Gertschanapis
Gertschanapis is a genus of minute araneomorph spiders in the family Anapidae. The genus contains a single species, Gertschanapis shantzi, described by Norman I. Platnick and Raymond Robert Forster in 1990. It is known only from the United States.
Gertschanapis shantzi
Gertschanapis shantzi is a minute araneomorph spider and the sole species in its genus. It belongs to the family Anapidae, a group of small spiders often associated with leaf litter and moss habitats. The species was first described from specimens collected in the United States and remains poorly known due to its cryptic size and habitat.
Gymnochiromyia flavella
Gymnochiromyia flavella is a small yellow fly in the family Chyromyidae, measuring 1.5–2 mm in length. It is characterized by distinctive head and thoracic setation patterns that aid in identification. The species is distributed across the Palearctic region, with confirmed records from Denmark, Norway, and Sweden.
Hyperaspidius simulatus
Hyperaspidius simulatus is a minute lady beetle species described by Gordon in 1985. Adults measure approximately 1.6–1.7 mm in length. The species name refers to its resemblance to other Hyperaspidius species in dorsal coloration. It is known from California, North America.
Jacobsoniidae
Jacobson's beetles
Jacobsoniidae is a small family of minute beetles within the superfamily Staphylinoidea, comprising three extant genera (Derolathrus, Sarothrias, Saphophagus) and approximately 28 described species. Adults and larvae inhabit cryptic microhabitats including leaf litter, rotting wood, fungal fruiting bodies, bat guano, and caves. The family exhibits remarkable morphological stasis since the Cretaceous, with fossil records from Cretaceous amber of Myanmar and France, Eocene Baltic amber, and Holocene copal. Members are among the smallest beetles, measuring 0.7–2.1 mm, and are exceptionally rare in collections.
Megalothorax
Megalothorax is a genus of minute springtails in the family Neelidae, order Neelipleona. The genus comprises approximately 14 described species. Members are characterized by extremely small body size and globular morphology typical of neelid springtails. The mitochondrial genome of M. incertus has been sequenced, revealing parthenogenetic reproduction and Wolbachia endosymbiont infection.
Megaspilinae
Megaspilinae is a subfamily of minute parasitoid wasps within Megaspilidae, superfamily Ceraphronoidea. Members of this subfamily are extremely small, often less than 2 mm in length, and are characterized by reduced wing venation and distinctive antennal structure. The subfamily includes genera of agricultural significance, such as Dendrocerus, which have been studied for their molecular characterization and distribution. Species within Megaspilinae have been documented from multiple regions including India, with recent records extending known distributions.
Microchridium minutum
Microchridium minutum is a species of cuckoo wasp in the family Chrysididae. It is among the smallest members of the family, with the genus name reflecting its diminutive size. Like other chrysidids, it is presumed to be a parasitoid or kleptoparasite, though specific host associations remain undocumented. The species is known from extremely limited material, with only a single observation recorded in iNaturalist.
Microweisea minuta
Pinpoint Lady Beetle
Microweisea minuta is an exceptionally small lady beetle (family Coccinellidae) native to Texas. Adults measure under 1 mm in length, making it one of the smallest members of its family. The species has a dark, piceous-colored body with a dark brown ventral surface. Like other members of the genus Microweisea, it is associated with scale insects and likely serves as a predator of these pests in its habitat.
Nanops schwarzi
Nanops schwarzi is a species of minute weevil in the family Curculionidae, first described by Dietz in 1891. It is provisionally accepted in taxonomic databases and has been recorded from North America. The genus Nanops comprises exceptionally small weevils, with adults often measuring less than 2 mm in length. Very little is known about the specific biology or ecology of this species.
Neelidae
Neelidae is a family of minute springtails in the order Neelipleona, comprising at least four genera and more than 30 described species. Members average around 500 μm in length and possess globular bodies superficially resembling those of Symphypleona, with relatively long legs and a well-developed furca. Molecular phylogenetic data places Neelidae as a basal group to all other Collembola, despite earlier morphological hypotheses linking them closely to Symphypleona. The family has worldwide distribution with records from Gondwanan regions, caves, and various terrestrial habitats.
Neotridactylus apicialis
larger pygmy mole grasshopper, larger pygmy locust, larger sand cricket, larger pygmy mole cricket
Neotridactylus apicialis is a minute orthopteran in the family Tridactylidae, one of only two species currently recognized in North America. Adults measure 5.5–10 mm and possess disproportionately enlarged hind legs adapted for powerful jumping. The species inhabits sandy margins of freshwater bodies, where it constructs shallow burrows and exhibits fossorial behavior. Despite their common name, pygmy mole crickets are more closely related to short-horned grasshoppers than to true mole crickets (Gryllotalpidae).
Oligositinae
Oligositinae is a subfamily of minute parasitoid wasps within the family Trichogrammatidae. Members are among the smallest known insects, with body lengths often under 0.5 mm. The subfamily was established by Viggiani in 1971, though with authorship dating to 1904. These wasps are characterized by reduced wing venation and simplified morphological features compared to other trichogrammatids. They are known primarily from preserved specimens, with limited biological data available.
Opopaea deserticola
Goblin spider
Opopaea deserticola is a species of goblin spider in the family Oonopidae, first described by Eugène Simon in 1892. Originally described from Southeast Asia, this species has demonstrated remarkable dispersal capabilities and is now recognized as having one of the widest distributions among oonopid spiders. It has been introduced to numerous regions worldwide including the Americas, Pacific islands, Atlantic islands, and Japan. The species is part of a diverse radiation of minute spiders that inhabit leaf litter and soil microhabitats, where their small size and cryptic coloration make them exceptionally difficult to detect.
Ossiannilssonola tunicarubra
Ossiannilssonola tunicarubra is a species of leafhopper in the family Cicadellidae, subfamily Typhlocybinae. It belongs to a genus characterized by minute size and reduced wing venation typical of typhlocybine leafhoppers. The species was described by Gillette in 1898 and is known from scattered records across the central and northeastern United States. Like other members of its subfamily, it is presumed to feed on plant phloem sap, though specific host associations remain poorly documented.
Perilampus auratus
Perilampus auratus is a minute parasitic wasp in the family Perilampidae (Hymenoptera: Chalcidoidea), measuring 1.3–5.5 millimeters in length. The species exhibits brilliant metallic coloration typical of the genus. As a member of Perilampidae, it is a hyperparasitoid, with larvae that parasitize other parasitic insects. New country records have been documented in Romania and Turkey, expanding its known Palaearctic distribution.
Psyllobora renifer
Kidney-spotted Fairy Lady Beetle, Kidney-spotted Psyllobora, Kidney-spotted Lady Beetle
Psyllobora renifer is a minute lady beetle distinguished by its unique kidney-shaped markings and specialized diet of powdery mildew fungi. At 1.75–2.4 mm, it is among the smallest lady beetles in North America. Unlike most lady beetles that prey on aphids and soft-bodied insects, this species has evolved to exploit fungal pathogens of plants as its primary food source. It occurs across North and Central America and is most reliably identified by the confluent, connected dark patches on its elytra that merge into larger irregular shapes rather than remaining as discrete spots.
Scatopsidae
Minute Black Scavenger Flies, Dung Midges
Scatopsidae, commonly known as minute black scavenger flies or "dung midges," is a small family of nematoceran flies in the order Diptera. The family contains approximately 250 described species across 27 genera, though many species remain undescribed. Members are typically small to minute (0.6–5 mm), dark-colored flies that bear superficial resemblance to black flies (Simuliidae) but generally lack the characteristic humped thorax of that family. They have a worldwide distribution.
Selvadius nunenmacheri
Selvadius nunenmacheri is a minute lady beetle species in the family Coccinellidae. Adults measure 1.55–2.35 mm in length. The species has been documented from Colorado in western North America. It belongs to a small genus of rarely encountered coccinellids.
Sphaerius
Sphaerius is a genus of minute beetles in the family Sphaeriusidae, comprising 18 extant species. These beetles are among the smallest in Coleoptera, measuring 0.5–1.2 mm in length. They inhabit damp environments near water bodies across all continents except Antarctica. The genus has undergone significant taxonomic revision, with its family name changing from Sphaeriidae to Microsporidae and finally to Sphaeriusidae.
Sphaeropsocus
Sphaeropsocus is a genus of small psocopterans in the family Sphaeropsocidae, first described by Hagen in 1882. It belongs to the suborder Troctomorpha, a group of barklice and booklice characterized by specialized mouthpart structures. The genus is part of a small family containing few described species, most of which are rarely encountered. Members of this genus are minute insects associated with dead plant material and organic debris.
Stethorus utilis
Stethorus utilis is a minute lady beetle in the family Coccinellidae, measuring only 1–2 mm in length. It is characterized by a black body with yellow antennae, mouthparts, and legs. The species is known from the southeastern United States, with records from North Carolina to Florida and west to eastern Texas. Like other members of the genus Stethorus, it is likely a predator of small arthropods, though specific ecological details remain poorly documented.
Synaptonecta issa
Synaptonecta issa is a minute water bug species in the family Micronectidae, first described by Distant in 1910. The species belongs to a genus of tiny aquatic true bugs that inhabit freshwater environments. Limited observational data exists, with only six iNaturalist records documented. The species has a disjunct distribution spanning North America and Southern Asia.
Tanaostigma
Tanaostigma is a genus of minute parasitic wasps in the family Tanaostigmatidae, within the superfamily Chalcidoidea. The genus was established by Howard in 1890. Members of this family are characterized by tiny body size and reduced wing venation, making them difficult to distinguish from related chalcidoid families without detailed examination. The family Tanaostigmatidae is a small group within the diverse Chalcidoidea, which contains numerous families of parasitoid wasps.
Trichoniscus pygmaeus
Least Pygmy Woodlouse
Trichoniscus pygmaeus is a minute terrestrial isopod commonly known as the Least Pygmy Woodlouse. It is native to Britain and Ireland, with a limited introduced distribution in the United States. The species is among the smallest woodlice in its native range, measuring approximately 2.5 mm in length. Its translucent, pinkish-yellow coloration and diminutive size distinguish it from other European woodlice.
Trogloneta paradoxa
Trogloneta paradoxa is a minute spider species in the family Mysmenidae, first described by Gertsch in 1960. Members of this family are among the smallest spiders known, with body lengths typically under 2 mm. The genus Trogloneta is characterized by a distinctive body shape featuring a disproportionately large, spherical posterior abdomen relative to the cephalothorax. The specific epithet "paradoxa" likely refers to this unusual morphology. The species is known from the United States.
Typhlocybella minima
Typhlocybella minima is a minute leafhopper species in the family Cicadellidae, first described by Baker in 1903. It belongs to the subfamily Typhlocybinae, a group commonly known as the typhlocybine or 'sharpshooter' leafhoppers, many of which are associated with specific host plants. The species has been recorded from scattered localities in the Americas and Hawaii, suggesting either a broad native range or possible human-mediated dispersal. As with most members of its genus, detailed biological information remains limited.
Zagloba ornata
Zagloba lady beetle
Zagloba ornata is a small lady beetle (family Coccinellidae) native to western North America. Adults measure 1.75–2 mm in length, making them among the smaller lady beetles. The species exhibits variable coloration, with a dark brown to light brown body and distinctive yellow markings on the pronotum and elytra. It has been recorded from southern Arizona and California north to southwestern Oregon.
Zilus aterrimus
Western Velvethead Lady Beetle
Zilus aterrimus is a minute lady beetle species in the family Coccinellidae. It is known from western North America, with records from Idaho and Washington south to California and Arizona. Adults measure approximately 1.25–1.60 mm in length.