Penthoscapha

Riedel, Alexander, 2009, Revision of the genus Penthoscapha Heller (Coleoptera, Curculionoidea, Entiminae, Eupholini) with notes on the genera of Eupholini from New Guinea, Zootaxa 2224, pp. 1-29 : 5

Key to the species of Penthoscapha

Note: At least one species of Penthoscapha exhibits marked sexual dimorphism. The females of P. pulverea , P. doormanensis , and P. l o re n t z i are yet unknown. Therefore, reliable identification of the respective females with this key cannot be guaranteed.

1 Rostrum ( Fig. 36 ) relatively long; in males 2.07–2.30 X longer than wide at base, in females 1.97–2.18 X longer than wide at base. Sides of abdominal ventrites and sides of thorax with patches of white scales ( Figs. 13, 15 ). Sides of aedeagus converging from base to pointed apex ( Fig. 37 ) ............................................................. P. similis

– Rostrum ( Figs. 32–35 , 40) relatively short; in males 1.56–1.88 X longer than wide at base, in females 1.50–1.70 X longer than wide at base. Sides of body without patches of white scales ( Figs. 2 , 5, 7 , 9, 11 , 17 ). Sides of aedeagus subparallel, in apical ¼ converging to extended tip ( Figs. 41 , 44, 47 , 50) ............................................................. 2

2 (1´) Elytral sculpture coarse, at least basally foveate-rugose ( Figs. 1–2 , 4–7 , 16–17 ). ................................................... 3

– Elytral sculpture shallow; striae regularly punctate; elytra evenly convex without costate intervals ( Figs. 8–11). 5

3 (2) Elytral intervals even, without longitudinal ridges ..................................................................................... P. toxopei

– Elytral interval 3 and 7 costate.................................................................................................................................. 4

4 (3) Elytral sculpture deeply foveate-rugose from base to apex; microsculpture at apical declivity coriaceous ( Fig. 20 ); lateral contour of elytra ( Figs. 4, 6 ) convex ................................................................................. P . gerhardschereri

– Elytral sculpture basally foveate-rugose, apically more shallow; microsculpture at apical declivity granulate ( Fig. 22 ); lateral contour of elytra ( Fig. 1 ) subangulate ...................................................................................... P. l o re n t z i

5 (2´) Elytra densely setose; setae of well-preserved specimens trapping particles of exocuticular pigment lending elytra a uniform ochre colour ( Figs. 8–9, 67 ) ..................................................................................................... P . pulverea

– Elytra subglabrous, with sparse setae; well-preserved specimens between stria 3 and 4 with band of yellowish exocuticular pigment ( Figs. 10 , 69 ) .................................................................................................. P . doormanensis

Figures

FIGURES 36 – 38. Penthoscapha similis, holotype: (36) Head and rostrum; (37) aedeagus, dorsal aspect; (38) aedeagus, lateral aspect; (39) endophallus with transfer apparatus. FIGURE 40. Head and rostrum of Penthoscapha toxopei.

FIGURES 12 – 15. Penthoscapha similis (12) holotype, dorsal aspect; (13) holotype, lateral aspect (14) allotype, dorsal aspect; (15) allotype, lateral aspect.

FIGURES 32 – 35. Head and rostrum of Penthoscapha species: (32) P. l o re n t z i, lectotype (33) P. gerhardschereri, holotype; (34) P. doormanensis, holotype; (35) P. pulverea, holotype.

FIGURES 1 – 3. Penthoscapha lorentzi, lectotype: (1) dorsal aspect; (2) lateral aspect; (3) labels.

FIGURES 4 – 7. Penthoscapha gerhardschereri: (4) holotype, dorsal aspect; (5) holotype, lateral aspect; (6) allotype, dorsal aspect; (7) allotype, lateral aspect.

FIGURES 10 – 11. Penthoscapha doormanensis (10) dorsal aspect, paratype; (11) lateral aspect, holotype.

FIGURES 16 – 19. Penthoscapha toxopei, paratype (16) dorsal aspect; (17) lateral aspect (18) labels; (19) elytral apex, lateral aspect.

FIGURES 41 – 43. Penthoscapha lorentzi, lectotype: (41) aedeagus, dorsal aspect; (42) aedeagus, lateral aspect; (43) endophallus with transfer apparatus.

FIGURES 47 – 49. Penthoscapha doormanensis, holotype: (47) aedeagus, dorsal aspect; (48) aedeagus, lateral aspect; (49) endophallus with transfer apparatus.

FIGURES 20 – 25. Elytral apex of Penthoscapha species, lateral aspect: (20) P. gerhardschereri, holotype; (21) P. gerhardschereri, allotype, arrow marking apical tooth; (22) P. l o re n t z i, lectotype; (23) P. doormanensis, holotype; (24) P. pulverea, holotype; (25) P. similis, holotype.

FIGURES 67 – 70. Detail of elytron of Penthoscapha species with exocuticular pigments [67 – 69], or with degenerate exocuticle [70]: (67) P. pulverea, holotype; (68) P. gerhardschereri, holotype; (69) P. doormanensis, holotype; (70) P. lorentzi, lectotype.