Geotragus Schoenherr

Ren, Li, Alonso-Zarazaga, Miguel A. & Zhang, Runzhi, 2013, Revision of the Chinese Geotragus Schoenherr with description of three new species (Coleoptera: Curculionidae: Entiminae), Zootaxa 3619 (2), pp. 161-182 : 163-164

Key to Chinese species of Geotragus Schoenherr

1 Elytral interstria 1 strongly elevated at top of declivity, forming a prominent longitudinal crest........................ 2

1’ Elytral interstria 1 not elevated at declivity, not forming a longitudinal crest....................................... 4

2 Elytral interstria 3 with three prominent consecutive tubercles before declivity..................... G. tuberculatus Chen

2’ Elytral interstria 3 without tubercles, only slightly elevated at the base........................................... 3

3 Frons convex, distinctly higher than basal part of rostrum; inner margin of protibiae with ten small denticles, length of the longest denticle less than 1/10 width of tibia at the same point; elytral interstria 5 distinctly raised from base to declivity, higher at declivity, forming a longitudinal crest...................................................... G. brevidens sp. nov.

3’ Frons flat, on same plane as dorsal part of rostrum; inner margin of protibiae with 11 moderately large denticles, length of the longest denticle subequal to 1/5 width of tibia at the same point; interstria 5 not distinctly raised from base, tubercle only distinct at declivity, conical................................................................. G. declivis sp. nov.

4 Dorsal surface of rostrum strongly corrugated, with a deep wide central furrow and many subparallel furrows; preocular area with a wide, deep and oblique impression laterally on each side of rostrum; in dorsal view, apex of aedeagus obliquely truncate..................................................................................... G. rugosus sp. nov.

4’ Dorsal surface of rostrum rather smooth, not corrugated; preocular area without oblique impressions; in dorsal view, apex of aedeagus ogival.................................................................. G. himalayanus Boheman