Dacrysoma denticulatum, Darby, Michael, 2013

Darby, Michael, 2013, Studies of Madagascan Ptiliidae (Coleoptera) 1: The Tribe Discheramocephalini including eighteen new species, Zootaxa 3718 (3), pp. 239-266 : 254-255

Dacrysoma denticulatum sp. n.

( Figs. 7 , 36, 37 , 43 , 64 , 80 , 92)

Habitus Fig. 7 . Length. 0.80–0.81 mm. Colour dusky yellow, antennae paler yellow. Antennomeres 3–11 Fig. 43 . Pronotum 0.23 mm long, 0.34 mm wide, lateral margins with a sharply angled projection, pubescence very long, approximately one third to one quarter length of the pronotum, fovea coarse, +/- 7 between anterior and posterior margins ( Fig. 64 ). Elytra: length 0.49 mm, width 0.46 mm, foveae finer and denser, and pubescence shorter than pronotum.

Male: aedeagus Fig. 92.

Female: spermatheca Fig. 80 .

Etymology. This epithet is derived from the Latin adjective dentatus, meaning toothed, and recognises the shape of the lateral margins of the pronotum.

Remarks. The sharply angled lateral margins of the pronotum will serve to distinguish this species from all others studied to date.

Type data. Holotype: ♂, Montagne d’Ambre N.P., sifting, 1100 m, 30.x.2010, P. Banar (BMNH). Paratypes: 4 ♀, same data as holotype (BMNH).

Figures

FIGURES 1 – 8. Habitus. 1, Discheramocephalus bisulcatus; 2, D. vasilii; 3, Cissidium banari ♀; 4, C. banari ♂; 5, Dacrysoma ranomafanense; 6, D. varium; 7, D. denticulatum; 8, D. fusum.

FIGURES 35 – 40. Dacrysoma spp .. 35, D. felis; 36, D. denticulatum, mesoventral process showing perforation (x 850); 37, D. denticulatum, mesoventral process showing perforation (x 1020); 38, D. varium aedeagus (x 1260); 39, D. ravelosoni aedeagus (x 1180); 40, D. fusum aedeagus (x 1440).

FIGURES 41 – 55. Dacrysoma spp. antennomeres 3 – 11 (hairs omitted). 41, D. ranomafanense; 42, D. varium; 43, D. denticulatum; 44, D. ravelosoni; 45, D. rahanitriniainae; 46, D. dolorosum; 47, D. nigerrimum; 48, D. fabrum; 49, D. imitatum; 50, D. longulum; 51, D. subinsulsum; 52, D. andasibense; 53, D. fusum; 54, D. pilosum; 55, D. delicatum.

FIGURES 62 – 76. Dacrysoma spp. pronota. 62, D. ranomafanense; 63, D. varium; 64, D. denticulatum; 65, D. ravelosoni; 66, D. rahanitriniainae; 67, D. dolorosum; 68, D. nigerrimum; 69, D. fabrum; 70, D. imitatum; 71, D. longulum; 72, D. subinsulsum; 73, D. andasibense; 74, D. fusum; 75, D. pilosum; 76, D. delicatum.

FIGURES 77 – 89. Dacrysoma spp. spermathecae. 77, D. ranomafanense; 78, D. varium; 79, D. delicatum; 80, D. denticulatum; 81, D. rahanitriniainae; 82, 83, D. ravelosoni; 84, D. pilosum; 85, D. nigerrimum; 86, D. fabrum; 87, D. andasibense; 88, D. imitatum; 89, D. subinsulsum.