Eucinetidae, Lacordaire, 1857

Jałoszyński, Paweł & Wakimura, Ryotaro, 2023, A new genus, new species and new records of Eucinetidae in Japan and Taiwan (Coleoptera), Zootaxa 5351 (1), pp. 122-138 : 129

Key to extant genera of Eucinetidae

1 Antennae filiform..................................................................................... 2

- Antennae clavate..................................................................................... 5

2 Mouthparts suctorial (labrum and prelabium elongate and subtriangular, anteriorly pointed)........... Eucilodes Vít, 1985

- Mouthparts not suctorial (labrum and prelabium transverse, anteriorly truncate or rounded)........................... 3

3 Elytra with dense fine transverse strigulae............................................... Eucinetus Germar, 1818

- Elytra lacking transverse strigulae........................................................................ 4

4 Body short oval; parameres much shorter than penis.......................... Noteucinetus Bullians & Leschen, 2004

- Body elongate oval; parameres longer than penis.......................................... Nycteus Latreille, 1829

5 Antennal fossae exposed in dorsal view.................................................................... 6

- Antennal fossae concealed in dorsal view.................................................................. 8

6 Antennomeres 2–10 transverse; antennae massive, compact..................................... Jentozkus Vít, 1977

- Five proximal antennomeres strongly elongate; antennae thin and loosely assembled................................ 7

7 Elytra with adsutural striae; elytral epipleura abruptly narrowing at level of first abdominal ventrite; antennae gradually thickening....................................................................... Euscaphurus Casey, 1885

- Elytra lacking adsutural striae; epipleura gradually narrowing; antennae with abruptly delimited tetramerous club............................................................................................. Bisaya Reitter, 1884

8 Antennae slender with trimerous clubs and elongate antennomeres 1–5; frontoclypeal border carinate, clypeus clearly visible in dorsal view............................................................. Bisayodes Wakimura & Jałoszyński

- Antennae massive, gradually thickening, antennomeres 2–10 transverse; frontoclypeal border not carinate or supraocular carinae connected at middle and clypeus not discernible in dorsal view........................................... 9

9 Each postgena projecting laterally to form distinct subtriangular denticle visible in dorsal view........ Proeuzkus Vít, 2000

- Postgenae unmodified................................................................................ 10

10 Elytra lacking adsutural striae............................................................ Tohlezkus Vít, 1977

- Each elytron with distinct adsutural stria in posterior half................................. Eucinetella Nikitsky, 1996