Ant-mimic
Guides
Anthicus flavicans
Golden Antlike Flower Beetle
Anthicus flavicans is a species of antlike flower beetle in the family Anthicidae. It is found in North America, with records from multiple Canadian provinces including Alberta, British Columbia, and Manitoba. The species is known by the common name Golden Antlike Flower Beetle. As a member of Anthicidae, it exhibits the characteristic ant-mimicking morphology typical of this family.
Castianeira alteranda
Prairie Ant-mimic Sac Spider
Castianeira alteranda is a species of ant-mimic spider in the family Corinnidae. It occurs in the northern United States and southern Canada, with records from Alberta, Manitoba, and Saskatchewan. The species was described by Gertsch in 1942. Like other members of the genus Castianeira, it exhibits ant-mimicry as a defensive strategy.
Castianeira amoena
Orange Ant-mimic Sac Spider
Castianeira amoena is a species of true spider in the ant-mimic sac spider family Corinnidae. The species is found in the United States and Mexico. Like other members of the genus Castianeira, it exhibits ant-mimicry as a defensive strategy. The species was first described by C. L. Koch in 1841.
Castianeira athena
Castianeira athena is a species of ant-mimic spider in the family Corinnidae, first described by Reiskind in 1969. Like other members of its genus, it exhibits Batesian mimicry of ants as a defensive strategy against predators. The species occurs in the United States and Mexico. As a corinnid spider, it is an active hunter rather than a web-builder.
Castianeira crocata
Red-spotted Ant-mimic Sac Spider, Red Stripe Spider
Castianeira crocata is a small ant-mimic spider in the family Corinnidae, first described by Nicholas Marcellus Hentz in 1847. It is found in the United States. The species has a black body with distinctive red dorsal markings, a color pattern that can lead to misidentification as a black widow spider despite its very different body shape. Like other Castianeira species, it exhibits ant-mimicry behaviors and morphology.
Castianeira crucigera
Castianeira crucigera is a species of ant-mimic spider in the family Corinnidae, found in the United States. Like other members of its genus, it exhibits ant-mimicry morphology and behavior. The species is poorly documented in the scientific literature compared to congeners such as C. cingulata.
Castianeira descripta
Red-spotted Ant-mimic Sac Spider, Redspotted Antmimic
Castianeira descripta is a small ant-mimicking spider in the family Corinnidae. It exhibits Batesian mimicry of ants, particularly carpenter ants, through body shape, coloration, and behavioral adaptations. The species is distributed across the United States and Canada.
Castianeira dorsata
Castianeira dorsata is a species of true spider in the family Corinnidae, first described by Banks in 1898. It is distributed across the United States and Mexico. Like other members of its genus, it is an ant-mimicking spider, though specific behavioral and ecological details for this species remain poorly documented.
Castianeira floridana
Castianeira floridana is a species of ant-mimicking spider in the family Corinnidae, native to the southeastern United States and Cuba. Like other members of its genus, it exhibits myrmecomorphy—mimicking ants in appearance and behavior as a defensive adaptation. The species was described by Banks in 1904. Information specific to this species beyond its geographic range is limited in published sources.
Castianeira thalia
Castianeira thalia is a species of ant-mimic spider in the family Corinnidae, first described by Reiskind in 1969. It belongs to a genus known for ant-mimicry, where spiders resemble ants in appearance and behavior to avoid predation. The species has been documented in the western United States, particularly along the West Coast.
Castianeira variata
Variegated Ant-mimic Sac Spider
Castianeira variata is an ant-mimicking spider in the family Corinnidae, found in North and Central America. Females typically measure 7–9 mm in body length and are larger than males. The species exhibits Batesian mimicry of ants, particularly carpenter ants, as a defense strategy against predators. It is similar in general appearance to C. longipalpus and can be distinguished by specific coloration and pattern details.
Castianeira walsinghami
Castianeira walsinghami is a species of true spider in the family Corinnidae. It occurs in the United States and Canada. Beyond basic taxonomic placement and geographic distribution, detailed natural history information for this specific species is limited in available sources.
Chyphotes petiolatus
Chyphotes petiolatus is a species of wingless wasp in the family Chyphotidae, a small family of solitary parasitoid wasps allied to Bradynobaenidae. The genus Chyphotes comprises flightless, ant-like species found in arid regions of western North America. Chyphotes petiolatus is known from extremely limited material, with only a single observation recorded in iNaturalist. Members of this genus are poorly studied, with most information derived from scattered museum specimens rather than field biology.
Cnopus impressus
ant-like leaf beetle
Cnopus impressus is a small beetle species in the family Aderidae, commonly known as ant-like leaf beetles. The species was described by LeConte in 1875 and is known to occur in North America. Like other members of Aderidae, it exhibits an ant-like appearance, which serves as a form of protective mimicry. The family Aderidae is a relatively small group of beetles with approximately 50 genera worldwide, characterized by their compact body form and association with decaying plant matter.
Colliuris caymanensis
Colliuris caymanensis is a small ground beetle in the tribe Odacanthini, endemic to the Cayman Islands. It was originally described by Darlington in 1947 and was previously treated as a subspecies of C. tetrastigma before being elevated to full species status. Like other members of the genus Colliuris, it is a slender, ant-mimicking carabid beetle.
Euderces reichei
Euderces reichei is a species of ant-mimicking longhorned beetle in the family Cerambycidae, described by John Lawrence LeConte in 1873. Adults are small, typically under 10 mm in length, and exhibit Batesian mimicry of ants through their compact body form, constricted waist-like appearance, and coloration. The species has been recorded across the eastern and central United States, with adults frequently encountered on flowers of flowering dogwood (Cornus florida) during spring.
Micaria constricta
Micaria constricta is a small ground spider in the family Gnaphosidae, first described by Emerton in 1894. The species belongs to the genus Micaria, a group of spiders commonly known as 'ant-mimics' due to their resemblance to ants in both appearance and movement. M. constricta has a Holarctic distribution, occurring in North America and across northern Eurasia from Northern Europe to Middle Siberia. Records indicate presence in Alberta, Canada, and parts of the United States, as well as Svalbard and Russia.
Micaria foxi
Micaria foxi is a small ant-like spider in the family Gnaphosidae, first described by Gertsch in 1933. It belongs to the M. rossica/M. foxi species group, which forms a phylogenetic clade sister to M. formicaria. Like other Micaria species, it is distinguished by piriform gland spigots similar in size to major ampullate gland spigots. The species is known from North America, with records from the United States and Canada including Alberta and British Columbia.
Micaria medica
Micaria medica is a species of ground spider in the family Gnaphosidae, described by Platnick and Shadab in 1988. The genus Micaria comprises small, active hunters commonly known as ant-mimic spiders due to their resemblance to ants in movement and body form. This species is part of the diverse North American gnaphosid fauna. Very little specific biological information has been published for M. medica.
Micaria nye
Micaria nye is a species of ground spider in the family Gnaphosidae, described by Platnick and Shadab in 1988. The genus Micaria comprises small, active spiders commonly known as ant-mimics due to their morphology and behavior. This species is part of a taxonomically challenging group within Gnaphosidae, with species often distinguished by subtle genitalic and somatic characters.
Myrmecotypus lineatus
Myrmecotypus lineatus is a species of true spider in the family Corinnidae, subfamily Castianeirinae. It is the only species in the genus Myrmecotypus with a documented occurrence in the United States, making its distribution atypical compared to congeners which are otherwise restricted to the Neotropical region (Mexico to Panamá). The species was described by Emerton in 1909. Very few observations of this spider exist in public databases.
Myrmex egregius
Myrmex egregius is a species of antlike weevil in the beetle family Curculionidae. It was described by Casey in 1892. The species is found in North America. Very little specific information is documented about its biology or ecology.
Myrmex floridanus
antlike weevil, Florida antlike weevil
Myrmex floridanus is a species of antlike weevil in the family Curculionidae, characterized by morphological adaptations that mimic ants. The species was described by Casey in 1892 and is currently treated as a synonym of Otidocephalus floridanus in some taxonomic databases. It occurs in North America, with records primarily from the southeastern United States. The genus Myrmex belongs to the tribe Myrmecini, a group of weevils known for their ant-mimicking appearance.
Myrmex ulkei
Myrmex ulkei is a species of antlike weevil in the beetle family Curculionidae, characterized by its myrmecophilous (ant-associated) morphology. The species was described by Horn in 1873 and is known from North America. Members of the genus Myrmex exhibit extreme morphological convergence with ants, an adaptation that likely facilitates their association with ant colonies.
Myrmex vandykei
Myrmex vandykei is a species of antlike weevil in the family Curculionidae, described by Sleeper in 1970. The species is found in North America. Like other members of the genus Myrmex, it exhibits morphological adaptations that give it a superficial resemblance to ants, a form of protective mimicry. The specific epithet honors the entomologist Edwin C. Van Dyke.
Paradamoetas
Paradamoetas is a genus of jumping spiders (Salticidae) first described by George and Elizabeth Peckham in 1885. The genus name derives from Greek 'para' (alongside) combined with the related genus Damoetas. It contains four species distributed across North and Central America, from Canada to Panama. The type species, P. formicinus, was described in the same paper as the genus.
Pilophorus crassipes
Pilophorus crassipes is a plant bug species in the family Miridae, described by Heidemann in 1892. It occurs in eastern North America and Central America. The genus Pilophorus includes species known for ant-mimicking appearance, though specific traits for P. crassipes are not well documented in available sources.
Pilophorus furvus
Pilophorus furvus is a species of plant bug in the family Miridae, first described by Knight in 1923. The species is known from eastern North America, with records from Maine, Massachusetts, New Jersey, and Washington, D.C. Like other members of the genus Pilophorus, it exhibits ant-mimicking morphology. The species has been documented in iNaturalist with limited observations.
Pilophorus heidemanni
Pilophorus heidemanni is a species of plant bug in the family Miridae, described by Poppius in 1914. It belongs to a genus known for ant-mimicking morphology. The species has been recorded from the southeastern United States. Like other members of Pilophorus, it likely exhibits morphological adaptations that resemble ants, though specific details for this species are limited.
Pilophorus juniperi
Pilophorus juniperi is a species of plant bug in the family Miridae, first described by Knight in 1923. It belongs to a genus known for ant-mimicking morphology and behavior. The species has been documented in eastern and northeastern United States, with specific records from Pennsylvania, West Virginia, and Wisconsin.
Pilophorus piceicola
Pilophorus piceicola is a species of plant bug in the family Miridae, first described by Knight in 1926. It is native to North America, with records from the northeastern United States including New York and West Virginia. Like other members of the genus Pilophorus, it exhibits ant-mimicking morphology. The species is poorly documented in scientific literature beyond taxonomic descriptions and basic distribution records.
Pilophorus tibialis
Pilophorus tibialis is a species of plant bug in the family Miridae, first described by Van Duzee in 1918. It belongs to the genus Pilophorus, which is noted for ant-mimicking species that exhibit morphological and behavioral adaptations resembling ants. The species has been documented in western North America and Mexico.
Pilophorus walshii
Pilophorus walshii is a species of plant bug in the family Miridae, first described by Uhler in 1887. The species is known from eastern North America, with records from Georgia, Illinois, New York, Pennsylvania, West Virginia, and Wisconsin. It has been documented feeding on Honey locust (Gleditsia triacanthos) foliage. The species has been the subject of life history studies combining field observations with laboratory rearing.
Rhopalosomatidae
Rhopalosomatid Wasps
Rhopalosomatidae is a small family of aculeate wasps containing approximately 68 extant species in four genera: Rhopalosoma, Olixon, Liosphex, and Paniscomima. Adults are solitary and often ant-like in appearance. Larvae are obligate ectoparasitoids of crickets (Orthoptera: Grylloidea), attaching to the lateral side of the host between the metafemur and abdomen. The family exhibits remarkable morphological diversity, with winged species typically nocturnal and brachypterous species mainly diurnal. The family has a worldwide tropical and subtropical distribution, absent from Europe and Antarctica.
Septentrinna bicalcarata
Septentrinna bicalcarata is a species of true spider in the family Corinnidae, first described by Eugène Simon in 1896. The species is recorded from the United States and Mexico. It belongs to a small genus of ground-dwelling spiders within the ant-mimic spider family Corinnidae. Published information on its biology and ecology remains limited.
Sergiolus montanus
Common Patterned Ant-mimic Ground Spider
Sergiolus montanus is a medium-sized ground spider in the family Gnaphosidae, distinguished by bold coloration that may serve as mimicry of velvet ants (Mutillidae). It is primarily active during daylight hours and does not construct webs for prey capture. The species is found in western North America, with records from Alberta and British Columbia in Canada southward through the western United States. Like other members of the genus, it is agile, nomadic, and capable of climbing vegetation and vertical surfaces.
Synageles noxiosus
Synageles noxiosus is a species of jumping spider in the family Salticidae. It is found in North America and the Bahama Islands. The species belongs to a genus of ant-mimicking jumping spiders, characterized by their distinctive morphology and behavior that allows them to resemble ants.
Synageles venator
Palaearctic Antmimic Jumping Spider
Synageles venator is a small ant-mimicking jumping spider in the family Salticidae. Females reach approximately 4 mm in length, with males slightly smaller. The species exhibits striking myrmecomorphy—mimicking ants in appearance, movement, and behavior. It holds its second pair of legs raised like antennae and moves with rapid, halting urgency characteristic of ants. This mimicry provides protection from predators that have learned to avoid ants due to their chemical defenses.
Synemosyna petrunkevitchi
Synemosyna petrunkevitchi is a jumping spider in the family Salticidae. It belongs to the genus Synemosyna, which is known for ant-mimicking species. The species occurs in the United States and Cuba. Published observations remain limited.
Thanatus formicinus
Running Crab Spider, Ant-mimic Crab Spider
Thanatus formicinus is a running crab spider in the family Philodromidae with a Holarctic distribution spanning North America, Europe, and Asia. It is a ground-dwelling hunter active during spring and early summer, often observed basking on warm surfaces like concrete paths. The species exhibits ant-mimicry in both appearance and behavior, a distinctive trait among crab spiders.
Tutelina similis
Thick-spined Jumping Spider
Tutelina similis is a small jumping spider in the family Salticidae, native to North America. Males measure 4.0–5.0 mm in body length and display striking black and white facial markings, including distinctive "eyebrow" lines behind the anterior median eyes. The species exhibits pronounced sexual dimorphism, with females being slightly larger and differently patterned. It is primarily active in June, when adults mature and hunt in sunlit patches of understory vegetation. Some populations have been documented as ant-mimics and ant specialists.
Zodarion rubidum
European Ant-eating Spider
Zodarion rubidum is a small ant-eating spider native to southwestern France that has expanded its range across central Europe and been introduced to North America. It is a specialized myrmecophagous predator that employs aggressive mimicry to resemble red ants, enabling it to hunt among ant colonies. The species is primarily nocturnal and constructs distinctive igloo-shaped stone retreats for daytime shelter.