Ptenidium inornatum, Darby, Michael, 2016

Darby, Michael, 2016, Studies of Peruvian Ptiliidae (Coleoptera) 4: Peruvium a new subgenus of Ptenidium with seven new species, Zootaxa 4107 (3), pp. 392-402 : 398-401

Ptenidium inornatum sp. n.

(Figs. 6, 9, 17, 25, 32, 35a–b, 41, 45, 46, 47)

Habitus Fig. 6. Length 0.78 mm. Colour black/dark brown, antennae and legs dusky yellow. Antennomeres 3–11 0.31 mm long. Top of head with shallow sculpturation forming a +/- anteriorly pointed ridge Fig. 9. Width across eyes 0.31 mm. Pronotum without setae on the posterior angles 0.44 mm wide, 0.28 mm long. Elytra 0.57 mm long, 0.49 mm wide. Scutellum with a small raised disc and two circular depressions on the basal margin Fig. 25. Proventral keel between procoxae with a shallow medial depression and straight posterior margin Fig. 17. Hind margin of metaventrum with a short logitudinal line of setae (often abraided) Figs. 45–47 .

Male: aedeagus Figs. 35 a–b., ventrite VII Fig. 41 .

Female: spermatheca pear-shaped Fig. 32.

Etymology. From the Latin inornatus meaning unadorned and referring to the absence of setae on the pronotal hind angles.

Diagnosis. This is a rather variable species which future research may split into two or three species. The absence of setae on the pronotal hind angles and the presence of the short medial ridge of setae on the male metaventral posterior margin distinguish it.

FIGURES 27–32. Spermatheca. 27. P. gibbosum ; 28. P. contractum ; 29. P. carinatum ; 30. P. capillatum ; 31. P. brevissimum ; 32. P. inornatum .

. Type data: Holotype: ♂, PERU: Cusco Dept.: Villa Carmen Field Station, cafeteria ~ 1.7 km west, research transect, 12.89250°S 71.41917°W, 555m, 21–22.V.2011, DJ Bennett & E. Razuri, flight intercept trap, PER-11- FIT-007 (MUSM). Paratypes: 1 ex., PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 70.10962°W, 295m, 7–9.VI.2011, Chaboo team, flight intercept trap, PER-11-FIT-025 (MUSM/ SEMC); ♂, PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 70.10962°W, 295m, 11–13.VI.2011, Chaboo team, flight intercept trap, PER-11-FIT-031 (MUSM/SEMC); 17 exs, PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 70.10962°W, 295m, 7–9.VI.2011, Chaboo team, flight intercept trap, PER-11-FIT-021 (MUSM/SEMC/BMNH); 6 exs, PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 70.10962°W, 295m, 7–9.VI.2011, Chaboo team, flight intercept trap, PER-11-FIT-017(MUSM/SEMC/BMNH); 4 exs, PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 70.10962°W, 295m, 11–13.VI.2011, Chaboo team, flight intercept trap, PER-11-FIT-019(MUSM/SEMC/BMNH); 2 exs, PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 70.10962°W, 295m, 9–11.VI.2011, Chaboo team, flight intercept trap, PER-11-FIT- 018(MUSM/SEMC); 2 exs, PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 70.10962°W, 295m, 11–13.VI.2011, Chaboo team, flight intercept trap, PER-11-FIT-023(MUSM/SEMC); 1 ex, PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 70.10962°W, 295m, 7–9.VI.2011, Chaboo team, flight intercept trap, PER-11-FIT-021 (MUSM/SEMC); 1 ex, PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 71.10962°W, 295m, 11–13.VI.2011, Chaboo team, blue pan trap, PER-11-PTB-011(MUSM/SEMC); 3 exs, PERU: Madre de Dios Dept.: CICRA Field Station, trail 6, research plot, 12.55207°S 70.10962°W, 295m, 7–9.VI.2011, Chaboo team, Malaise trap, PER-11-MAT- 024(MUSM/SEMC/BMNH); 2 exs, PERU: Madre de Dios Dept.: CICRA Field Station, Exp. Plot, north transect, 123.55261°S 70.11008°W, flight intercept trap, 295m, 11–13.VII.2010, Chaboo team, PER-10-FIT-005(MUSM/ SEMC); 1 ex, PERU: Madre de Dios Dept.: CICRA Field Station, Exp. Plot, south transect, 123.55261°S 70.11008°W, flight intercept trap, 295m, 11–13.VII.2010, Chaboo team, PER-10-FIT 0 0 6 (MUSM/SEMC); 1 ex, PERU: Madre de Dios Dept.: CICRA Field Station, Exp. Plot, north transect, 123.55261°S 70.11008°W, flight intercept trap, 295m, 13-15.VII.2010, Chaboo team. PER 10-FIT-009 (MUSM/SEMC).

Figures

FIGURES 37 – 49. 37. P. brevissimum antenna; 38. P. contractum antenna; 39. P. gibbosum antenna. 40. P. gibbosum antennomeres 10 & 11 x 1340; 41. P. inornatum abdominal ventrite VII; 42. P. grande abdominal ventrite VII; 43. P. gibbosum mentum and mouthparts x 970; 44. P. grande mentum and submentum x 355; 45. P. inornatum posterior margin of metaventrum and abdominal segments x 665; 46. P. inornatum medial setae on posterior margin of metaventrum x 665; 47. P. inornatum insertion points of medial setae (abraided) on posterior margin of metaventrum x 3800; 48. P. grande abdominal ventrites x 635; 49. P. grande mesoventrum x 355.

FIGURES 33 – 36. Aedeagus. 33 a & b. P. grande; 34. P. gibbosum; 35 a & b. P. inornatum; 36 a & b. P. brevissimum.