Dacrysoma dolorosum, 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 : 259

Dacrysoma dolorosum sp. n.

( Figs. 46 , 67 , 96)

This species exists as a single dissection making a habitus photograph impossible. Length. 0.80–0.81 mm. Colour: dusky yellow, antennae paler yellow. Antennae: the stalk of the dumb-bell shaped antennomere 11 very long Fig.46 . Head pubescence very long (as Fig. 61 ). Pronotum Fig. 67 , 0.21 mm long, 0.29 mm wide, lateral margins strongly angled, pubescence very long, foveae moderate/coarse, +/- 7 between anterior and posterior margins. Elytra: 0.49 mm long, 0.46 mm wide, foveae moderate, pubescence shorter than on head and pronotum.

Male: aedeagus Fig. 96.

Female: not known.

Etymology. This epithet is taken from an adjectival form of the Latin noun dolor, meaning sad, and reflects the mournful impression given by the appearance of the downwardly pointing tip of the aedeagus and the fragmentary nature of the specimen.

Remarks. Immediately distinguishable by the very long bar to the dumb-bell shaped antennomere 11, a character which is shared by only one other species, D. longulum , from which it may be separated by the form of the pronotum with more strongly angled lateral margins, and the more hooked shape of the aedeagus with a narrowed tip.

Type data. Holotype: ♂, Montagne d’Ambre N.P., sifting, 1100 m, 30.x.2010, P. Banar (BMNH).

Figures

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 56 – 61. Dacrysoma spp. pronota. 56, D. ravelosoni (x 515); 57, D. nigerrimum (x 530); 58, D. ranomafanense (x 555); 59, D. fabrum (x 555); 60, D. varium (x 525); 61, D. rahanitriniainae (x 635).