Platyhydnobius, Peck & Cook, 2009

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 : 51-52

Key to Species of Platyhydnobius

1 Head with a transverse groove at level of posterior margin of eyes; males with a tooth at apical one-third of posterior margin of mesofemur and of metafemur ( Figs. 151, 152 ); larger species, length of pronotum + elytra about 4 mm ... ....................................................................................................................................................................... P. validus

- Head without a transverse groove; all male femora without teeth; smaller species, length of pronotum + elytra less than 3.5 mm .................................................................................................................................................................. 2

2 Paramere apices broad, very thin, one-third of paramere length extends beyond apex of median lobe ( Fig. 145 ); northern transcontinental and south to Arizona ...................................................................................... P. arizonensis

- Parameres shorter, one-third of length not extending beyond apex of median lobe (e.g. Figs. 157 , 162 ); known to occur in Mexico and Honduras [females of these species can be reliably identified only by association with males]. ...................................................................................................................................................................................... 3

3 Median lobe of aedeagus apically truncate ( Fig. 164 ) ................................................................................. P. calvario

- Median lobe of aedeagus apically narrow or lobed, not truncate ............................................................................... 4

4 Median lobe of aedeagus abruptly narrowed to small apical lobe ( Fig. 166 )...................................... P. howdenorum

- Median lobe of aedeagus gradually narrowed apically ............................................................................................... 5 5 Median lobe of aedeagus evenly rounded apically ( Fig. 157 ); each paramere with a single large preapical seta dorsally ( Fig. 157 ); body broadly ovate, ratio elytral length:width = 1:0.9; elytral bases with a narrow transverse yellow band ........................................................................................................................................................... P. andersoni

- Median lobe of aedeagus not evenly rounded apically; each paramere with 2 large preapical setae dorsally; body narrower, ratio elytral length:width = 1:0.8 or less; elytral coloration not as above ........................................................ 6

6 Elytra yellowish with a broad black lateral border than does not reach the base, and a narrow black sutural border .. ........................................................................................................................................................................ P. bicolor

- Elytra coloration not as above .................................................................................................................................... 7

7 Apex of median lobe narrow ( Fig. 173 ). Mexico................................................................................. P. newtonorum

- Apex of median lobe broadly rounded ( Fig. 169 ). Honduras......................................................................... P. latigra

Figures

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 156–159. Platyhydnobius andersoni. 156. Right antenna, dorsal view. 157. Aedeagus, dorsal view. 158. Female sternite 8, ventral view. 159. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Fig. 159), 0.4 mm (Fig. 158), 0.5 mm (Figs. 156, 157).

FIGURES 161–162. Platyhydnobius bicolor. 161. Right antenna, dorsal view. 162. Aedeagus, dorsal view. Scale bar = 0.4 mm (Fig. 162), 0.5 mm (Fig. 161).

FIGURES 163–164. Platyhydnobius calvario. 163. Right antenna, dorsal view. 164. Aedeagus, dorsal view. Scale bar = 0.5 mm (Figs. 163, 164).

FIGURES 165–166. Platyhydnobius howdenorum. 165. Right antenna, dorsal view. 166. Aedeagus, dorsal view. Scale bar = 0.4 mm (Fig. 166), 0.5 mm (Fig. 165).

FIGURES 172–175. Platyhydnobius newtonorum. 172. Right antenna, dorsal view. 173. Aedeagus, dorsal view. 174. Female sternite 8, ventral view. 175. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Fig. 175), 0.4 mm (Figs. 173, 174), 0.5 mm (Fig. 172).

FIGURES 167–171. Platyhydnobius latigra. 167. Right antenna, dorsal view. 168. Mandibles, dorsal view. 169. Aedeagus, dorsal view. 170. Female sternite 8, ventral view. 171. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Figs. 168, 171), 0.4 mm (Figs. 169, 170), 0.5 mm (Fig. 167).