Dacrysoma fabrum

Darby, Michael, 2013, Studies of Madagascan Ptiliidae (Coleoptera) 1: The Tribe Discheramocephalini including eighteen new species, Zootaxa 3718 (3), pp. 239-266 : 260

Dacrysoma fabrum sp. n

(Figs. 11, 48, 59, 69, 86, 95)

Habitus Fig. 11. Length. 0.80–0.81 mm. Colour: yellowy brown, antennae and legs paler yellow. Antennae very short, antennomeres 3–11 Fig. 48 . Pronotum: 0.21 mm long, 0.28 mm wide, puncturation very faint, Figs 59 , 69 . Elytra: 0.54 mm long, 0.45 mm wide, puncturation stronger than on pronotum.

Male: aedeagus Fig. 95.

Female: spermatheca Fig. 86 .

Etymology. This epithet is taken from the Latin adjective faber, meaning ingenious, and refers to the joined nature of the dumb-bell shaped antennomere 11.

Remarks. The absence of clear pronotal puncturation is similar to D. fusum , but D. fabrum may be separated from that and all other Dacrysoma species examined to date except D. denticulatum by the absence of a clearly defined dumb-bell shape to antennomere 11 which shows only a slight median narrowing. See D. longulum for the possibility that females of that species may be confused with females of D. fabrum

Type data. Holotype ♂: Ranomafana N.P., sifting, S.21˚14’51’’ E. 47˚24’13’’, 1079 m, 16–18.xi.2010, P. Banar (BMNH). Paratypes: 22 exs, same data as holotype; 11 exs, Ranomafana N.P., RNF/12/2011, sifting litter, Winkler app. extr., S.21˚ 14’ 51.3’’ E. 47˚ 24’ 09.1’’, 1118 m, 15.iv.2011, P. Banar & Raveloson (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 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).

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.