Cyrtoscydmini

Jałoszyński, Paweł, 2015, Schuelkelia gen. n., a new eastern Palaearctic ant-like stone beetle, with synopsis of Eurasian genera of Cyrtoscydmini (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 4007 (3), pp. 343-369 : 350-351

Key to Chinese genera of Cyrtoscydmini

1. Antenna lacking constriction between antennomeres X and XI which are closely connected and antennae appear 10-segmented............................................................................. Syndicus Motschulsky

- Antennomere X and XI distinctly separated................................................................. 2

2. Antennae nearly as long as body and nearly filiform, weakly and gradually thickened distally; femur of each leg with narrow longitudinal dorsal groove and small glandular opening........................................... Loeblites Franz

- Antennae shorter than body and not filiform, either with club composed of 2–5 terminal antennomeres or distinctly gradually thickened distally; femora lacking dorsal grooves and glandular openings.......................................... 3

3. Distance between posterior margin of eye and occipital constriction (i.e., length of temple) comparable to length of eye or larger, eyes not adjacent to anterior margin of pronotum in intact specimens....................................... 4

- Distance between posterior margin of eye and occipital constriction much shorter than length of eye, eyes adjacent or nearly adjacent to anterior margin of pronotum................................................................... 7

4. Each elytron with two basal foveae distinct in dry-mounted specimens.......................................... 5

- Each elytron with one basal fovea or rudiments of foveae not visible in dry-mounted specimens...................... 6

5. Mesoventral intercoxal process shorter than mesocoxae and less elevated than mesocoxae (in lateral view its ventral margin concealed by mesocoxae); metaventral intercoxal process with two long spines projecting posteriorly; pronotal base with distinct median pit in addition to lateral pits; head with small pit at posteromesal margin of each supraantennal tubercle; basal elytral foveae connected by U-shaped groove extending anteriorly............................ Horaeomorphus Schaufuss

- Mesoventral intercoxal process keel-like, longer than mesocoxae and more elevated than mesocoxae (its ventral margin visible in lateral view, not concealed by mesocoxae); metaventral intercoxal process lacking spines, with straight or concave posterior margin; pronotal base lacking median pit; head lacking pits near supraantennal tubercles; basal elytral foveae not connected...................................................................................... Euconnus Thomson

6. Elytra with basal foveae not visible in dry-mounted specimens; pronotum lacking antebasal pits.... Schuelkelia Jałoszyński

- Each elytron with one distinct fovea; pronotum with paired antebasal pits........... Microscydmus Saulcy & Croissandeau

7. Head with raised dorsal median triangular area pointing posteriorly and frons with median longitudinal groove........................................................................................... Nanoscydmus Jałoszyński

- Head lacking raised median triangular area and lacking longitudinal groove...................................... 8

8. Each elytron with one large basal fovea filled with dense setae................................. Neuraphes Thomson

- Each elytron with asetose basal fovea..................................................................... 9

9. Pronotum with lateral edges and transverse antebasal groove................................. Scydmoraphes Reitter

- Pronotum lacking lateral edges and lacking transverse antebasal groove.......................... Stenichnus Thomson