Nearctitychus

Distinguished from other Tychini genera by a combination of characters established in the original description by Chandler (1988). Specific diagnostic features for Nearctitychus include derived morphological traits of the antennae, pronotum, and aedeagus that separate it from related Nearctic and Palearctic genera. The single species N. sternalis can be identified within the genus by its unique combination of these structural features.

Found in association with ant colonies, as is characteristic of Pselaphinae beetles. Specific microhabitat preferences for N. sternalis have not been documented in detail.

The genus name indicates a Nearctic distribution; the single described species N. sternalis occurs in the Nearctic region. Precise locality data for the type specimen and additional records are not widely published.

• ants - myrmecophilyLives in ant colonies; specific ant host species unknown

Exhibits myrmecophilous behavior, living within ant colonies. The specific behavioral adaptations facilitating this association have not been described.

As a myrmecophile, likely occupies a specialized niche within ant colony ecosystems. The exact ecological function within these colonies is unknown.

• TychusBoth belong to tribe Tychini and share myrmecophilous habits; Nearctitychus is distinguished by Nearctic distribution and specific structural characters of the antennae and genitalia
• CaccoplectusAnother genus in tribe Tychini with ant-associated species; Nearctitychus differs in body proportions and details of the elytral structure

• Staphylinidae
• Pselaphinae
• Tychini
• myrmecophile
• monotypic genus
• Nearctic

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