Amerostenini
Amerostenini Bouček, 1988. Type genus: Amerostenus Girault, 1913.
Diagnosis.
Antennal flagellum with 4 anelli and 4 funiculars (Fig. 87). Pronotum not medially divided. Ovipositor sheaths not expanded.
Discussion.
Molecular data indicate that the previously mentioned ( Bouček 1988) unusual morphology of Yrka dahmsi Bouček new placement suggests that it belongs in the tribe Amerostenini in Colotrechninae instead of in Coelocybidae .
Morphology is consistent with this change, given that Yrka and some Amerostenini share a count of 4 antennal anelli.