Atomaria (Anchicera), Thomson, 1863

Lyubarsky, Georgy Yu., Alekseev, Vitalii & Bukejs, Andris, 2023, A new fossil species and new record of Atomaria Stephens (Coleoptera: Cryptophagidae) from Eocene Baltic amber, Zootaxa 5375 (2), pp. 241-248 : 242

Subgenus Anchicera Thomson, 1863

Note. The studied amber specimen shows the combination of characters unequivocally corresponding to the family Cryptophagidae : 11-segmented antennae with loose, 3-segmented club; tarsal formula 5-5-5; incomplete epipleura; elytra completely covering abdomen, with irregular punctation; procoxal cavities closed externally; and abdominal ventrite 1 longest. The studied amber specimen can be classified into the subfamily Atomariinae based on the following characters: antennal insertions situated under the lateral margin of forehead; and pronotum without callosities, teeth and submarginal lines. The new extinct species is assigned to the subgenus Anchicera within the genus Atomaria based on the combination of the following characters: distance between antennal insertions larger than distance between antennae and аnterior margin of eye; and lateral sides of elytra widely rounded, not parallel.