Ptenidium contractum, 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 : 396-397

Ptenidium contractum sp. n.

(Figs. 4, 11, 15, 22, 28, 38)

Habitus Fig. 4. Length 0.90 mm. Colour black, shining, appearing polished; antennae and legs dusky yellow. Antennomeres 3–11 0.27 mm long Fig. 38 . Forehead smooth and shining on disc with scattered pubescence laterally, projecting forward medially as a rounded extension onto the pubescent and shallowly rugose frons (Fig. 11).Width across eyes 0.29 mm. Pronotum with a small number of hair-like setae on the rear angles and a narrow raised border on the lateral margins 0.39 mm wide, 0.28 mm long Fig. 15 . Elytra 0.65 mm long, 0.51 mm wide. Scutellum with a small, median rounded keel and two very shallow depressions at the base Fig. 22. Proventral keel between mesocoxae tapering posteriorly and smoothly rounded towards dorsum as capillatum Fig. 20.

Male: not known.

Female: spermatheca Fig. 28.

Etymology. After the Latin contraho meaning to draw together and referring to the narrow appearance of the species.

Diagnosis. The form of the pronotum which is wider medially than in the posterior half will distinguish this species.

Type data: Holotype: ♀, PERU: Cusco Dept.: Villa Carmen Field Station, cafeteria ~ 1.7 km west, research transect, 12.89250°S 71.41917°W, 555m, 22–24.V.2011, D.J.Bennett & E. Razuri, flight intercept trap, PER-11- FIT-009 ( MUSM). Paratype: ♀, 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 ( SEMC).

FIGURES 16–21. Proventral process. 16. P. carinatum x 890; 17. P. inornatum x 1160; 18. P. gibbosum x 1340; 19. P. brevissimum x 890; 20. P. capillatum x 1480; 21. P. grande x 355.

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 12 – 15. Setae on pronotal hind angle. 12. P. brevissimum x 1480; 13. P. carinatum x 2140; 14. P. gibbosum x 1840; 15. P. contractum x 2040.