Microscydmus (Scydmomicrus) queenslandicus, 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 : 22

Microscydmus (Scydmomicrus) queenslandicus sp. n.

( Figs. 23 , 32 , 55 , 62 )

Material studied. Holotype: ♂: two labels: " 11.51S 142.38E QLD / 12km SSE Heathlands / 26 Jan- 1 Mar 1992 / P. Feehney, closed / forest MALAISE#3#4" [white, printed], " MICROSCYDMUS / (SCYDMOMICRUS) / queenslandicus m. / det. P. Jałoszyński, 2013 / HOLOTYPUS " [red, printed] ( ANIC). Paratype: ♀, same data except " 1-21 Mar 1992 " ( ANIC).

Diagnosis. Male and female: body light brown with slightly darker head; frons broadly subtrapezoidal; punctures on head large and dense, adjacent to each other, contrasting with fine and unremarkable punctation of pronotum and elytra; BL <0.60 mm; pronotum and head equally broad; pronotum with ante-basal transverse groove; EI 1.500. Male: aedeagus with lightly sclerotized and indistinct internal armature visible only in subapical region.

Description. Body of male ( Fig. 23 ) moderately convex, elongate and slender, with moderately long appendages, BL 0.500 mm; cuticle glossy; body light brown with slightly darker head and slightly lighter appendages; vestiture yellowish.

Head subtrapezoidal, broadest at eyes, HL 0.075 mm, HW 0.125 mm; tempora barely marked; vertex weakly convex; frons broadly subtrapezoidal. Eyes strikingly large and strongly projecting laterally from the head silhouette, coarsely faceted. Punctures on head dorsum distinct, large and deep, adjacent to each other; setae short, sparse and suberect. Antennae slender, AnL 0.200 mm; antennomeres I–II elongate, III–X transverse; XI as long as broad.

Pronotum ( Fig. 32 ) in dorsal view oval, broadest between middle and anterior third, PL 0.125 mm, PW 0.125 mm; anterior and lateral margins rounded; posterior margin shallowly bisinuate; base of pronotum with two pairs of small and shallow pits, internal pair connected by 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 0.300 mm, EW 0.200 mm, EI 1.500; basal impressions short; elytral apices separately rounded. Punctures on elytral disc as fine as those on pronotum; setae short, sparse and suberect. Hind wings well developed, about twice as long as elytra.

Legs moderately long and slender, without modifications.

Aedeagus ( Fig. 55 ) small, AeL 0.080 mm; stout, with lightly sclerotized and indistinct internal armature located in its subapical region; each paramere with long apical seta.

Female. Externally indistinguishable from male. BL 0.500 mm; HL 0.080 mm, HW 0.130 mm, AnL 0.200 mm; PL 0.130 mm, PW 0.130 mm; EL 0.300 mm, EW 0.200 mm, EI 1.500.

Distribution ( Fig. 62 d). NE Australia (N Queensland).

Etymology. Locotypical, after Queensland.

Remarks. Microscydmus queenslandicus differs from all Australian congeners in having distinctly and densely punctate head dorsally, extremely large eyes and broadly subtrapezoidal frons; this combination of characters allows for unambiguous species identification.

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).