Tarsal-segmentation
Guides
Euaesthetinae
A subfamily of rove beetles (Staphylinidae) containing six tribes. Members are distinguished by slender antennae with two or three apical antennomeres forming a loose club, and tarsal segmentation of 4-4-4 or 5-5-5 (5-5-4 in some exotic genera). Five genera and 22 species are recorded from North America. The genus Octavius, primarily distributed in the Afrotropical region, has been subject to recent taxonomic revision in South Africa.
Parandrinae
Parandrinae is a morphologically distinctive subfamily of longhorn beetles (Cerambycidae) comprising approximately 14 genera and over 120 described species worldwide. The group is notable for its atypical features among cerambycids: short, equal-segmented antennae rather than the elongated antennae characteristic of most longhorn beetles, and distinctly pentamerous tarsi with five visible segments. These traits produce a remarkable superficial resemblance to stag beetles (Lucanidae), leading to frequent misidentification. The subfamily has a disjunct global distribution with centers of diversity in South America and Africa, while North America contains only four taxa. Two tribes are recognized: Erichsoniini and Parandrini.