Acrotrichis terminalis, Darby, Michael, 2014

Darby, Michael, 2014, Studies of Madagascan Ptiliidae (Coleoptera) 3: The genus Acrotrichis including twenty seven new species, Zootaxa 3866 (2), pp. 151-201 : 198

Acrotrichis terminalis sp. n.

( Figs. 33A –G)

Habitus Fig. 33A . Length 0.53 mm. Yellowish brown species. Antennomeres 3–11 0.22 mm long Fig. 34 C. Mentum and submentum chaetotaxy Fig. 33 E. Width across eyes 0.20 mm. Pronotum 0.26 mm wide, 0.14 mm long, sides with a barely detectable sinuation before the hind angle Fig. 33 B. Elytra 0.26 mm long, 0.28 mm wide. Mesoventrum with marginal setae, collar Fig. 33 F. Metaventral posterior margin Fig. 33 G.

Male: ventrite six with 5/6 fine spines; aedeagus Fig. 33 D.

Female: not known.

Etymology. The last species to be studied and possibly the smallest Acrotrichis known to date.

Remarks. Although described on the basis of a single male, the very small size, narrow body and short antennal segments are sufficient to distinguish this species from all others.

Type data. Holotype: ♂, Ankarafantsika N.P., AKF/09/2011, sifting forest litter, Winkler app. extr., S.16˚18’09.9” E.46˚48’39.3”, 87 m, 23.iv.2011, L.S. L.S.Rahanitriniaina & R.Raveloson ( BMNH).

Figures

FIGURE 33. A. terminalis. A, habitus; B, side of pronotum viewed at 45 ˚; C, antennomeres 3 – 11; D, aedeagus; E, mentum and submentum showing chaetotaxy (note: dotted lines indicate probable positions of missing setae); F, mesoventral collar x 810; G, metaventral posterior margin x 810.

FIGURE 34. A. truncata. A, habitus; B, side of pronotum viewed at 45 ˚; C, antennomeres 3 – 11; D, spermatheca; E elytron and submentum showing chaetotaxy; F, meso- and metaventrum x 400; G, mentum.