Scydmaenilla (Scydmaenilla) queenslandica Franz

Jałoszyński, Paweł, 2013, Revision of subgenera of Stenichnus Thomson, with review of Australo-Pacific species (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 3630 (1), pp. 39-79 : 72-74

Scydmaenilla (Scydmaenilla) queenslandica Franz

( Figs. 94 , 100 , 106 , 114–115 )

Stenichnus (Scydmaenilla) queenslandicus Franz, 1975: 139 , Fig. 115 .

Type material studied. Holotype: 3: three labels ( Fig. 106 ): "Umg. Maipoton / Queensld., Austr. / lg.H.Franz 1970" and "Pa 77" on the reverse side [white, printed, reverse handwritten in blue], " Stenichnus / queenslandicus / m. / det.H.Franz" [white, printed and handwritten in blue], " Typus " [red, handwritten in blue] (SAM).

Diagnosis. Body length about 1.20 mm; elytra stout, EI 1.44; antennal club with slightly asymmetrical antennomere X; metatibiae with short and slender subapical setal brushes; lateral metaventral carinae absent; short median longitudinal groove on posterior pronotal collar present; lateral marginal pronotal carinae barely discernible.

Redescription. Body of male ( Figs. 94 , 100 ) slightly flattened, elongate but moderately slender, with long appendages, BL 1.18 mm; glossy, uniformly brown with slightly lighter legs and maxillary palps; vestiture yellowish-brown.

Head ( Fig. 94 ) approximately subtriangular, broadest at eyes, HL 0.20 mm, HW 0.25 mm; tempora distinctly shorter than eyes; vertex transverse and distinctly, evenly convex, anteriorly demarcated from frons by a pair of large but superficial impressions broadly separated in middle and located postero-mesally to distinct but weakly raised supraantennal tubercles; frons between antennal insertions convex; eyes large and strongly convex, distinctly bean-shaped and oblique in relation to the long axis of the head. Punctures on head dorsum fine and sparse, inconspicuous; setae short, sparse, suberect. Antennae ( Fig. 94 ) relatively short, with distinct club composed of antennomeres IX–XI, with slightly asymmetrical antennomere X, AnL 0.45 mm; antennomeres I–II strongly elongate, III–V each about as long as broad, VI–VIII slightly transverse, IX–X strongly transverse, XI 1.4 × as long as broad.

Pronotum ( Fig. 94 ) in dorsal view with large and oval discal part broadest near anterior fourth of PL and short posterior collar demarcated by barely marked lateral constriction, PL 0.33 mm, PW 0.28 mm; anterior and lateral margins of discal part confluent and rounded; posterior margin nearly straight; hind pronotal corners indistinctly marked, blunt and obtuse; posterior collar dorsally distinctly demarcated by sharply marked, narrow and slightly arcuate transverse groove connecting a pair of small but deep lateral ante-basal foveae; additionally posterior collar with short but distinct median longitudinal groove connected to ante-basal transverse groove but not reaching posterior pronotal margin; lateral marginal carinae barely discernible. Punctures on pronotal disc very fine and inconspicuous, those on posterior collar distinct and dense, but only superficial; setae moderately long, sparse and suberect to erect.

Elytra ( Fig. 94 ) oval and more convex than pronotum, broadest near anterior third, EL 0.65 mm, EW 0.45 mm, EI 1.44; humeral calli moderately distinct, developed as elongate protuberances; elytral apices separately rounded. Punctures on elytral disc much more distinct than those on pronotum, shallow and with diffused margins but relatively large and separated by spaces equal to or slightly smaller than puncture diameters; setae moderately long, relatively dense and suberect. Hind wings well-developed, twice as long as elytra.

Legs ( Fig. 94 ) long and slender; all tibiae straight or nearly straight, each metatibia with short and slender subapical setal brush.

Aedeagus ( Figs. 114–115 ) relatively stout, approximately oval, AeL 0.11 mm, with trapezoidal and welldemarcated but short apical part; internal armature lightly sclerotized, with sub-basal central complex and submedian lateral groups of fine needle-like sclerites; parameres short and robust, each with one apical and two subapical setae.

Female. Unknown.

Distribution. Eastern Australia: southeastern Queensland.

Remarks. Scydmaenilla queenslandica , S. thompsoniana and S. constricta are unique within the genus in having the asymmetrical antennomere IX; see Remarks for S. constricta and S. thompsoniana .

Figures

FIGURES 93 – 98. Dorsal habitus of Scydmaenilla. Scydmaenilla (s. str.) constricta Lea, paralectotype female (93), Scydmaenilla (s. str.) queenslandica Franz, holotype male (94), Scydmaenilla (s. str.) thompsoniana, holotype female (95), Scydmaenilla (s. str.) brisbanensis, holotype female (96), Scydmaenilla (s. str.) sydneyana, holotype female (97), Scydmaenilla (Scydmaenillunia) adelaidensis Franz, holotype female (98).

FIGURES 99 – 104. Ven t er of Scydmaenilla. Scydmaenilla (s. str.) constricta Lea, paralectotype female (99), Scydmaenilla (s. str.) queenslandica Franz, holotype male (100), Scydmaenilla (s. str.) thompsoniana, holotype female (101), Scydmaenilla (s. str.) brisbanensis, holotype female (102), Scydmaenilla (s. str.) sydneyana, holotype female (103), Scydmaenilla (Scydmaenillunia) adelaidensis Franz, holotype female (104). Abbreviations: ai, asetose impression of mesoventrite; lmtc, lateral metaventral carina; pl, posterior lobe of mesocoxal projection; si, setose impression of mesoventrite.

FIGURES 105 – 110. Original sets of labels. Scydmaenilla (s. str.) constricta Lea, lectotype (105), Scydmaenilla (s. str.) queenslandica Franz, holotype (106), Scydmaenilla (s. str.) thompsoniana, holotype (107), Scydmaenilla (s. str.) brisbanensis, holotype (108), Scydmaenilla (s. str.) sydneyana, holotype (109), Scydmaenilla (Scydmaenillunia) adelaidensis Franz, holotype (110).

FIGURES 111 – 115. Aedeagus in ventral (111, 114) and lateral (112, 115) views, and spermatheca (113). Scydmaenilla (s. str.) constricta Lea, lectotype (111 – 112), Scydmaenilla (s. str.) brisbanensis, holotype (113), Scydmaenilla (s. str.) queenslandica Franz, holotype (114 – 115).