Dyscharachthis Blackburn, 1900

Otto, Robert L., 2024, Three additions to the false click beetle (Coleoptera: Elateroidea: Eucnemidae) fauna in the Nearctic region, Insecta Mundi 2024 (47), pp. 1-14 : 6

Genus Dyscharachthis Blackburn, 1900

(= Galloisius Fleutiaux, 1923 )

Diversity and distribution. Dyscharachthis is a small sized genus consisting of approximately 20 species. One extant species and two extinct species from Baltic amber are present in the Palearctic region. Five species, including a number of undescribed species are present in the Neotropical region. One extinct species is known from Dominican amber in the Caribbean. The remaining 11 species are present in the Oriental and Australian/Oceanic regions, including an indeterminate number of undescribed species.

Diagnosis. Apical margin of frontoclypeal region evenly rounded and more or less than twice as wide as the base; basally closed, lateral antennal grooves present; metathoracic coxal plates medially 1.2–2.5 or 3.0–6.0 times wider than laterally; last visible ventrite either rounded or emarginate; tarsomere IV excavated, usually wider than V apically; tarsal claws simple; lateral surfaces of mesothoracic and metathoracic tibiae with setae only.

Dyscharachthis are often confused with species of Idiotarsus Bonvouloir. The presence of excretory grooves at the basolateral area of the hypomera are evident in species of Idiotarsus . These structures however, are not present in Dyscharachthis .