Cathartosilvanus perkovskyi sp. nov. - first record of Silvanidae (Coleoptera: Cucujoidea) from Eocene Rovno amber Author Alekseev, Vitalii I. Author Bukejs, Andris text Baltic Journal of Coleopterology 2021 2021-09-30 21 1 19 24 journal article 10.5281/zenodo.10667723 1407-8619 10667723 E29678D0-062C-4EDA-8B3E-A8BF9CCC07A5 Genus Cathartosilvanus Grouvelle, 1912 Note. The studied amber specimen shows the combination of characters unequivocally corresponding to the subfamily Silvaninae : subparallel body shape; pentamerous tarsi with tarsomere 4 smallest; closed procoxal cavities; 11-segmented antennae with distinct, loose antennal club; antennal scape comparatively short, about as long as wide; frons laterally without longitudinal sulcus; and frontoclypeal suture absent. The beetle under consideration is assigned to Cathartosilvanus based on the combination of the following characters: (1) lateral sides of pronotum not dentate; (2) anterolateral denticle on pronotum present and located behind anterior margin of pronotum; (3) all tarsomeres simple (not lobed and not incrassate); (4) abdominal ventrite 1 with femoral lines open; (5) antennomere 8 not narrower than antennomere 7; (6) antennal club 3-segmented with first segment narrower than second; (7) antennomere 11 not obviously elongate; (8) antennomeres without spines; and (9) apical segment of labial palp not smaller than previous segment.