Physodera sciakyi, Ma, Yunlong, Shi, Hongliang & Liang, Hongbin, 2017

Ma, Yunlong, Shi, Hongliang & Liang, Hongbin, 2017, Revision of the Oriental Genus Physodera Eschscholtz, 1829 (Coleoptera, Carabidae, Lebiini, Physoderina), with the descriptions of two new species, Zootaxa 4243 (2), pp. 297-328 : 304

eburata -group

The eburata -group contains three very similar species: P. eburata Heller , P. bifenestrata Heller , and P. sciakyi sp. n.

These three insular species of the eburata-group distribute in the Philippines, Borneo, and Sulawesi. ( Fig. 65 )

The diagnostic characters of this species group are: Pronotum unicolor ; elytra black with purplish hue, disc with a pair of ivory callosities; tergum VII and sternum VII dark, without light pattern; antennameres 5–11 distinctly widened and flattened (Fig. 59). Terminal labial palpomeres truncate in both sexes, not strongly securiform (Fig. 60); males with two pairs of setae on sternum VII. Aedeagus stout and straight, apical lamella short and wide; internal sac with main flagellum thick, reaching apical orifice; trumpet-form expansion large, length 0.4–0.45 times of the main flagellum; secondary flagellum short and thick, weakly sclerotized; apical bursa present.

These three species are doubtless close for the similarities mentioned above. The following characters are unique in the genus: elytra with a pair of ivory callosities; antennameres distinctly widened since the fifth. The eburata -group could be also close to dejeani -group for their aedeagus stouter than other species groups and both have ivory callosities. But differences on some secondary sexual characters (male labial palpomere, and seta on sternum VII) show otherwise.

Figures

FIGURE 65. Known distribution of Physodera eburata group: * P. eburata Heller; ● P. bifenestrata Heller; Ɨ P. sciakyi sp. n., type localities for valid names in red.