Penicillidmus unicolor, Jałoszyński, Paweł, 2014

Jałoszyński, Paweł, 2014, The smallest Cyrtoscydmini of Australia: revision of Microscydmus Saulcy & Croissandeau and Penicillidmus gen. n. (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 3774 (1), pp. 1-30 : 28

Penicillidmus unicolor sp. n.

( Figs. 28 , 37 , 61 , 63 )

Material studied. Holotype: ♂: three labels: " 13.45S 143.22E QLD / 8km WbyN of Bald Hill / McIlwraith Range / 27 June- 12 July 1989 / T.A. Weir 500m upper / Leo creek site" [white, printed], "Berlesate / ANIC 1117 / leaf litter / closed forest" [white, printed], " PENICILLIDMUS / unicolor m. / det. P. Jałoszyński, 2013 / HOLOTYPUS " [red, printed] ( ANIC). Paratype: ♀: three labels: " 13.44S 143.20E QLD / 11km WbyN of Bald Hill / McIlwraith Range / 27 June- 12 July 1989 / T.A. Weir 520m / search party campsite" [white, printed], "Berlesate / ANIC 1110 / leaf & palm / frond litter / closed forest" [white, printed], and standard yellow " Paratypus " label ( ANIC).

Diagnosis. Male: Body uniformly light brown; antennomere II strongly elongate; head dorsum strongly and densely punctate; internal pair of pronotal ante-basal pits connected by transverse impression; internal sclerites of aedeagus strongly divergent toward base of median lobe.

Description. Body of male ( Fig. 28 ) strongly convex, elongate and slender, with moderately long appendages, BL 0.830 mm; cuticle glossy; head, pronotum and elytra uniformly light brown, appendages slightly lighter; vestiture yellowish.

Head ( Fig. 37 ) subtrapezoidal, broadest at eyes, HL 0.150 mm, HW 0.200 mm; tempora much shorter than eyes, rounded and moderately convergent postero-mesally; vertex weakly convex; frons subtriangular but with indistinct antero-median projection. Eyes strikingly large but weakly projecting laterally from the head silhouette, coarsely faceted. Punctures on head dorsum dense, deep and relatively large, separated by spaces shorter than puncture diameters; setae short, sparse and suberect. Antennae slender, AnL 0.280 mm; antennomeres I–II each strongly elongate, III–X transverse; XI slightly elongate.

Pronotum ( Fig. 37 ) in dorsal view subquadrate, broadest near anterior fourth, PL 0.230 mm, PW 0.230 mm; anterior margin slightly convex, arcuate, lateral margins strongly rounded in anterior third and weakly rounded in middle, from lateral setal brush strongly bent postero-mesally; posterior margin shallowly bisinuate; base of pronotum with two pairs of small pits, internal pair connected by distinct transverse impression. Punctures on pronotal disc fine and inconspicuous; setae sparse, thin, short and suberect.

Elytra oval, slightly more convex than pronotum, broadest near middle, EL 0.450 mm, EW 0.330 mm, EI 1.380; basal impressions short; elytral apices separately rounded. Punctures on elytral disc fine and shallow; setae short, sparse and suberect. Hind wings well developed, about twice as long as elytra.

Legs moderately long and slender, without modifications.

Aedeagus ( Fig. 61 ) small, AeL 0.110 mm; slender, with two strongly divergent basally, lightly pigmented but distinct elongated sclerites inside median lobe; each paramere with long apical seta.

Female. Externally differs from male only in distinctly smaller eyes, and in consequence tempora longer than eyes. BL 0.830 mm; HL 0.150 mm, HW 0.200 mm, AnL 0.280 mm; PL 0.230 mm, PW 0.230 mm; EL 0.450 mm, EW 0.330 mm, EI 1.380.

Distribution ( Fig. 63 b). NE Australia (N Queensland).

Etymology. The name unicolor refers to the body coloration of this species.

Figures

FIGURES 20 – 28. Dorsal habitus of holotypes. Microscydmus (Scydmomicrus) australiensis Franz, female (20); M. (Sc.) nasicornis Franz, female (21); M. (Sc.) capitiseboraci sp. n., male (22); M. (Sc.) queenslandicus sp. n., male (23); M. (Sc.) styxianus sp. n., male (24); M. (Sc.) edithensis sp. n., male (25); M. (Sc.) tooloomensis sp. n., male (26); Penicillidmus masseyensis sp. n., male (27); P. unicolor sp. n., male (28).

FIGURES 29 – 37. Body silhouette of holotypes. Microscydmus (Scydmomicrus) australiensis Franz, female (29); M. (Sc.) nasicornis Franz, female (30); M. (Sc.) capitiseboraci sp. n., male (31); M. (Sc.) queenslandicus sp. n., male (32); M. (Sc.) styxianus sp. n., male (33); M. (Sc.) edithensis sp. n., male (34); M. (Sc.) tooloomensis sp. n., male (35); Penicillidmus masseyensis sp. n., male (36); P. unicolor sp. n., male (37).

FIGURES 54 – 61. Aedeagi in ventral views. M. (Sc.) capitiseboraci sp. n. (54); M. (Sc.) queenslandicus sp. n. (55); M. (Sc.) styxianus sp. n. (56); M. (Sc.) edithensis sp. n. (57); M. (Sc.) tooloomensis sp. n. (58 – 59); Penicillidmus masseyensis sp. n. (60); P. unicolor sp. n. (61).

FIGURES 62 – 63. Distribution of Microscydmus (Scydmomicrus subgen. n.) (62) and Penicillidmus gen. n. (63). Microscydmus (Scydmomicrus) australiensis Franz (62 a); M. (Sc.) nasicornis Franz (62 b); M. (Sc.) capitiseboraci sp. n. (2 c); M. (Sc.) queenslandicus sp. n. (62 d); M. (Sc.) styxianus sp. n. (62 e); M. (Sc.) edithensis sp. n. (62 f); M. (Sc.) tooloomensis sp. n. (62 g); Microscydmus (Sc.) sp. (62 h); Penicillidmus masseyensis sp. n. (63 a); P. unicolor sp. n. (63 b); Penicillidmus sp. (63 c).