Sogdini, Lopatin, 1961

Peck, Stewart B. & Cook, Joyce, 2009, Review of the Sogdini of North and Central America (Coleoptera: Leiodidae: Leiodinae) with descriptions of fourteen new species and three new genera, Zootaxa 2102 (1), pp. 1-74 : 7-8

Key to North American genera of Sogdini

1 Antennal club 3-segmented ( Figs. 8 , 62 )...................................................................................................................... 2

- Antennal club interrupted 5-segmented (e.g. Figs. 15 , 37 ).......................................................................................... 3

2 Metafemur slender, metatibia not widened apically ( Fig. 10 ); clypeus sexually dimorphic, deeply concave in male; habitus as Fig. 1 ........................................................................................................................................... Triarthron

- Metafemur robust, metatibia widened apically ( Fig. 64 ); clypeus weakly concave in both sexes; habitus as Fig. 3 .... ........................................................................................................................................................................... Stereus

3 Large species, length of pronotum + elytra usually more than 4 mm; pronotum with sub-basal transverse impression or row of punctures; head ventrally without a suture separating gula from submentum; habitus as Fig. 6 .................. ........................................................................................................................................................... Macrohydnobius

- Small species, length of pronotum + elytra usually less than 4 mm; pronotum without a sub-basal transverse impression or row of punctures; head ventrally with a suture separating gula from submentum ......................................... 4

4 Head with microsculpture of fine, irregular lines; labrum not emarginate; pronotum minutely punctate; habitus as Fig. 5 ..................................................................................................................................................... Kalohydnobius

- Head without microsculpture of fine, irregular lines; labrum emarginate; pronotal punctation fine to coarse ........... 5

5 Male metafemur usually without tooth or strong serrations on posterior margin (if tooth present on metafemur, mesofemur also has tooth on posterior margin) ( Figs. 151, 152 ); male with parameres longer than median lobe, and with large setae on dorsal surface before apex (e.g. Figs. 145 , 153 ); habitus as Fig. 7 ....................... Platyhydnobius

- Male metafemur with tooth or strong serrations on posterior margin (e.g. Figs. 17 , 71 ); mesofemur never with tooth; male with parameres shorter than median lobe, and without large setae dorsally before apex (e.g. Figs. 18 , 72 )....... 6

6 Apices of both mandibles entire ( Fig. 70 ); eyes prominent; habitus as Fig. 4 ................................................... Sogda

- Apex of right mandible bidentate (e.g. Fig.16 ); eyes not prominent; habitus as Fig. 2 .............................. Hydnobius

Figures

FIGURES 8–13. Triarthron lecontei. 8. Right antenna, dorsal view. 9. Mandibles, dorsal view. 10. Male right metafemur and metatibia. 11. Aedeagus, dorsal view. 12. Female sternite 8, ventral view. 13. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Figs. 11, 13), 0.5 mm (Figs. 8, 9, 12), 0.75 mm (Fig. 10).

FIGURES 62–67. Stereus arenarius. 62. Male right antenna, dorsal view. 63. Mandibles, dorsal view. 64. Male right metafemur and metatibia. 65. Aedeagus, dorsal view. 66. Female sternite 8, ventral view. 67. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Figs. 63, 67), 0.4 mm (Figs. 62, 65), 0.5 mm (Fig. 66), 0.75 mm (Fig. 64).

FIGURES 15–20. Hydnobius substriatus. 15. Right antenna, dorsal view. 16. Mandibles, dorsal view. 17. Male right metafemur. 18. Aedeagus, dorsal view. 19. Female coxites and styli, ventral view. 20. Female sternite 8, ventral view. Scale bar = 0.3 mm (Fig. 19), 0.4 mm (Figs. 15, 16, 18, 20), 0.5 mm (Fig. 17).

FIGURES 37–42. Hydnobius laticeps. 37. Right antenna, dorsal view. 38. Mandibles, dorsal view. 39. Male right metafemur. 40. Aedeagus, dorsal view. 41. Female sternite 8, ventral view. 42. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Figs. 40–42), 0.4 mm (Figs. 37, 38), 0.5 mm (Fig. 39).

FIGURES 1–4. Sogdini, habitus photos. 1. Triarthron lecontei, total length 3.4 mm. 2. Hydnobius autumnalis, total length 3.0 mm. 3. Stereus arenarius, total length 3.4 mm. 4. Sogda obtusa, total length 3.4 mm.

FIGURES 5–7. Sogdini, habitus photos. 5. Kalohydnobius dentatus, total length 2.6 mm. 6. Macrohydnobius montanus, total length 4.9 mm. 7. Platyhydnobius arizonensis, total length 2.7 mm.

FIGURES 149–155. Platyhydnobius validus. 149. Right antenna, dorsal view. 150. Mandibles, dorsal view. 151. Male right mesofemur. 152. Male right metafemur. 153. Aedeagus, dorsal view. 154. Female sternite 8, ventral view. 155. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Fig. 155), 0.4 mm (Fig. 154), 0.5 mm (Figs. 149, 150, 153), 1.0 mm (Figs. 151, 152).

FIGURES 143–147. Platyhydnobius arizonensis. 143. Right antenna, dorsal view. 144. Mandibles, dorsal view. 145. Aedeagus, dorsal view. 146. Female sternite 8, ventral view. 147. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Figs. 145, 147), 0.4 mm (Fig. 146), 0.5 mm (Figs. 143, 144).

FIGURES 69–74. Sogda obtusa. 69. Right antenna, dorsal view. 70. Mandibles, dorsal view. 71. Male right metafemur and metatibia. 72. Aedeagus, dorsal view. 73. Female sternite 8, ventral view. 74. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Figs. 72, 74), 0.4 mm (Fig. 73), 0.5 mm (Figs. 69–70), 0.75 mm (Fig. 71).