Quirsfeldia Cobos, 1964

Otto, Robert L., Muona, Jyrki & Córdoba-Alfaro, Jim, 2023, A new genus and sixteen new species of false click beetles (Coleoptera: Eucnemidae) described from the Heredia Province of Costa Rica with several additional records from the Osa Peninsula and Panama, Insecta Mundi 2023 (991), pp. 1-36 : 10

Genus Quirsfeldia Cobos, 1964

Diversity and distribution. The small group consists of several species with two being present in the Amazonian region of South America, particularly in Brazil and a third species recorded for the first time in Central America. The new Central American species is only known from a single province in Costa Rica.

Diagnosis. Apical margin of frontoclypeal region fairly evenly rounded and less than twice as wide as the distance between antennal sockets; poorly indicated notosternal antennal grooves present, caudally obliterated; elytral apices meeting tightly together; metacoxal plates parallel-sided, medially less than 2.5 times wider than laterally; frons simple; last visible ventrite acutely produced; simple tarsal claws; lateral surfaces of meso- and metatibiae with setae only ( Muona 2011).

The genus is very similar to Adelothyreus Bonvouloir and can be distinguished by the apical margin of the frontoclypeal region being less than twice as wide as the base. Adelothyreus has the apical margin of the frontoclypeal region more than twice as wide as the base.