Physodera amplicollis

amplicollis -group

The amplicollis -group contains three species: P. amplicollis van de Poll, P. diglena Andrewes, and P. bousqueti Mateu.

This species group distributes in southeastern Asia, including southern Chinese continent, Taiwan Island, Indo- China Peninsula, Malay Peninsula, Borneo, Java, and Sumatra (Fig.63).

The diagnostic characters of this species group are: Pronotum and elytra with distinct pattern; tergum VII yellowish, with distinct black pattern: three well defined spots or one central spot and vague lateral ones (Figs. 45, 46). Terminal labial palpomeres securiform in both sexes (Fig. 61); male mesotarsus with adhesive hairs at least well developed on the first tarsomere; males with two pairs of setae on sternum VII. Aedeagus gently slender, with apical lamella large, strongly oblique to right side; internal sac with main flagellum not reaching apical orifice; trumpet-form expansion small, length about 0.3 times of the main flagellum; secondary flagellum long and strongly sclerotized; apical bursa distinct (Figs. 34–36).

These three species are close in the following similarities: (1) aedeagal apical lamella longer than any other species in Physodera; (2) secondary flagellum of aedeagal internal sac about half as main flagellum, main flagellum apex not reaching apical orifice; (3) tergum VII with three dark spots (lateral spots vague in P. bousqueti) (Figs. 45 B, 46B); (4) the fifth elytral interval with only one basal setigerous pore.