Ant-associate
Guides
Cremastocheilus armatus
anteater scarab beetle
Cremastocheilus armatus is a myrmecophilous scarab beetle specialized for life within ant colonies. The species exhibits extreme morphological adaptations including reduced eyes, shortened elytra exposing most of the abdomen, and dense trichomes on abdominal tergites. Males display prominent pronotal horns absent in females. The beetle integrates into host ant colonies where it obtains food through interactions with worker ants.
Cremastocheilus mexicanus
Anteater scarab beetle
Cremastocheilus mexicanus is a myrmecophilous scarab beetle in the tribe Cremastocheilini. The species is part of a genus of approximately 35 North American species known as 'anteater scarabs' for their specialized predatory relationship with ants. Adults and larvae inhabit ant colonies where they feed on ant brood, exhibiting remarkable morphological and behavioral adaptations for this lifestyle. The species occurs in the southwestern United States and northern Mexico.
Cremastocheilus nitens
anteater scarab beetle
Cremastocheilus nitens is a myrmecophilous scarab beetle in the genus Cremastocheilus, commonly known as anteater scarab beetles. Like other members of this genus, it lives within ant colonies as a predator of ant brood. The species is native to the central United States and exhibits specialized morphological adaptations for survival inside hostile ant nests, including dense armored exoskeletons and modified mouthparts for feeding on ant larvae and pupae.
Cremastocheilus opaculus
Cremastocheilus opaculus is a species of anteater scarab beetle, one of approximately 35 North American species in the genus Cremastocheilus. Like other members of this genus, it is myrmecophilous, living within ant colonies where adults prey upon ant larvae and pupae. The species exhibits specialized morphological adaptations for this lifestyle, including a heavily armored exoskeleton and modified mouthparts. It has been documented from California and Baja California.
Cremastocheilus puncticollis
anteater scarab beetle
Cremastocheilus puncticollis is a species of anteater scarab beetle in the family Scarabaeidae. Like other members of the genus Cremastocheilus, this species is a specialized myrmecophile that lives within ant colonies. The species is found in the southwestern United States, specifically in Arizona and California. Adults are predators of ant larvae and pupae, employing remarkable behavioral and morphological adaptations to infiltrate and survive within hostile ant nests.
Cremastocheilus quadratus
anteater scarab beetle
Cremastocheilus quadratus is a myrmecophilous scarab beetle in the family Scarabaeidae, first described by Fall in 1912. Like other members of its genus, it lives within ant colonies as a predator of ant larvae and pupae. The species is found in the southwestern United States and northwestern Mexico.
Cremastocheilus saucius
anteater scarab beetle
Cremastocheilus saucius is a species of anteater scarab beetle in the family Scarabaeidae. Like other members of its genus, it is a myrmecophile that lives within ant colonies as a predator of ant brood. The species is found in the southwestern and central United States and northern Mexico. It exhibits specialized morphological adaptations for surviving in hostile ant nest environments.
Cremastocheilus schaumii
anteater scarab beetle
Cremastocheilus schaumii is a North American scarab beetle notable for its obligate myrmecophilous lifestyle. Adults live within ant colonies as predators of ant larvae and pupae, employing specialized morphological adaptations to avoid detection and expulsion by host workers. The species exhibits a complex life cycle involving death-feigning behavior to gain entry to nests, chemical camouflage through acquisition of colony scent, and modified mouthparts for piercing ant brood. Two subspecies are recognized: C. s. schaumii and C. s. tibialis.
Cremastocheilus spinifer
anteater scarab beetle
Cremastocheilus spinifer is a myrmecophilous scarab beetle species that lives within ant colonies as a predator of ant brood. Like other members of its genus, it exhibits remarkable behavioral and morphological adaptations for infiltrating and surviving in hostile ant nest environments. The species is part of a group of approximately 35 North American species known as "anteater scarabs" for their specialized diet of ant larvae and pupae.
Cyphomyrmex
fungus-growing ants
Cyphomyrmex is a genus of small, drab-colored fungus-growing ants in the tribe Attini, found primarily in the Neotropics. These ants cultivate fungi in the tribe Leucocoprineae as their primary food source, with most species growing fungal nodules rather than full mycelial gardens. Colonies are typically monogynous and small, rarely exceeding 500 workers. The genus is divided into two species complexes: the strigatus complex (South America only) and the rimosus complex (southern North America to South America). Cyphomyrmex represents a basal lineage among attine ants and serves as sister group to Mycetophylax.
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liometopi
Dinardilla liometopi is a small rove beetle described by Wasmann in 1901. It belongs to the tribe Sceptobiini within the large subfamily Aleocharinae. The species occurs in the southwestern United States and Mexico. Very few observations exist in public databases, indicating it is rarely collected or potentially cryptic in habit.
Myrmecophilus americanus
American ant cricket, ant cricket
Myrmecophilus americanus is a wingless cricket that lives as an obligate parasite within ant nests. It is kleptoparasitic, feeding on food scraps brought by worker ants and encouraging them to regurgitate food. The species shows host specificity to the longhorn crazy ant (Paratrechina longicornis), though occasional records from other ant species exist. Its body shape and size resemble the gaster of the ant queen, possibly assisting its integration into the colony through mimicry.
Myrmecophilus oregonensis
Oregon ant cricket, west coast ant cricket
Myrmecophilus oregonensis, commonly known as the Oregon ant cricket or west coast ant cricket, is a small myrmecophilous cricket species found in the western United States and Canada. Like other ant crickets in the genus Myrmecophilus, it lives within ant colonies and has adapted to a subterranean lifestyle with reduced eyes and enhanced sensory structures. The species ranges west of the Cascade Mountains from southern British Columbia through Oregon, Washington, and most of California.
Myrmecosaurus ferrugineus
Myrmecosaurus ferrugineus is a rove beetle (Staphylinidae: Paederinae) first described from Argentina in 1932. The species has been introduced to the southeastern United States, where it has been recorded in Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, and South Carolina. As a member of the myrmecophilous genus Myrmecosaurus, it is associated with ant colonies, though specific host relationships remain poorly documented. The species name refers to its rusty or iron-colored appearance.
Trimium
ant-loving beetles
Trimium is a genus of myrmecophilous rove beetles in the subfamily Pselaphinae, containing over 20 described species. These small beetles are specialized associates of ant colonies, living as inquilines within ant nests. The genus is placed in the tribe Trichonychini and is distributed across parts of northern Europe.
Xenodusa cava
Xenodusa cava is a small rove beetle (Staphylinidae) distributed across eastern and central North America. It is obligately myrmecophilous, with larvae developing inside ant colonies where they exhibit specialized begging behaviors and feed on ant brood. This species represents a classic example of inquiline symbiosis in beetles.