Harpalus katiae

Identification to species level requires examination of genitalic characters and other subtle morphological features. The species can be distinguished from congeners by the original description (Battoni 1985), which likely details specific features of the aedeagus, pronotal shape, and elytral sculpture. Without access to the original description or type specimens, precise diagnostic characters cannot be stated.

Specific habitat preferences are undocumented. Members of the genus Harpalus typically inhabit open, dry habitats including grasslands, agricultural fields, and disturbed areas. Given the distribution records from the southwestern United States and Middle America, it likely occurs in arid or semi-arid environments.

Recorded from the United States (southwestern region) and Middle America. The GBIF distribution records indicate presence in USA, Middle America (PRESENT), and North America (PRESENT). The iNaturalist observations count of 27 suggests it is infrequently encountered.

Activity patterns are undocumented. Most Harpalus species are spring-fall active in temperate regions, with peak activity varying by local climate conditions.

As a ground beetle, it likely functions as a generalist predator of small invertebrates and possibly as a granivore, contributing to pest control and seed predation in its habitat. These roles are inferred from the known ecology of congeners.

No specific documented interactions. Ground beetles in the genus Harpalus are generally considered beneficial in agricultural contexts due to their predatory and granivorous habits.

• Harpalus affinisSimilar general morphology and habitat preferences; distinguished by specific genitalic and external characters detailed in taxonomic revisions
• Harpalus pensylvanicusCommon North American congener with overlapping distribution; distinguished by body size, coloration, and male genitalia
• Other Harpalus speciesThe genus contains numerous similar species requiring careful examination of aedeagus and other fine structural characters for accurate identification

• ground beetle
• Carabidae
• Harpalinae
• Harpalus
• Coleoptera
• nocturnal predator
• arid habitat

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