Scydmaenilla (Scydmaenilla) sydneyana 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 : 76-77

Scydmaenilla (Scydmaenilla) sydneyana Franz

( Figs. 97 , 103 , 109 )

Stenichnus (Scydmaenilla) sydneyanus Franz, 1975: 140 .

Type material studied. Holotype: Ƥ: three labels ( Fig. 109 ): "Sydney" and " 1/1/95 " on the reverse side [white, printed, reverse handwritten in black], " Stenichnus / ( Scydmaenilla ) / sydneyanus / m. / det.H.Franz" [white, printed and handwritten in blue], " Type " [red, handwritten in blue] (SAM).

Additional material: Ƥ, Australia, New South Wales, Glenfield, date and collector unknown, labeled as a paratype (sic!) of Stenichnus sydneyanus by H. Franz (NHMW).

Diagnosis. Body length about 1.40–1.50 mm; elytra moderately slender, EI 1.36–1.55; antennal club symmetrical; metatibiae with subapical setal brushes; lateral metaventral carinae present; short median longitudinal groove on posterior pronotal collar absent; lateral marginal pronotal carinae distinct.

Redescription. Body of female ( Figs. 97 , 103 ) strongly convex, elongate and slender, with long appendages, BL 1.38–49 mm; glossy, uniformly light brown with slightly lighter legs and maxillary palps; vestiture yellowish.

Head ( Fig. 97 ) approximately subtriangular, broadest at eyes, HL 0.24–0.25 mm, HW 0.28 mm; tempora distinctly shorter than eyes; vertex distinctly transverse and weakly, evenly convex, anteriorly confluent with convex frons; supraantennal tubercles barely marked; 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. 97 ) moderately long, with distinct, symmetrical and slender club composed of antennomeres IX–XI, AnL 0.60–0.65 mm; antennomeres I–VIII elongate, IX–X distinctly transverse, XI 1.7 × as long as broad.

Pronotum ( Fig. 97 ) in dorsal view with large and oval discal part broadest near anterior fourth of PL and short posterior collar demarcated by shallow lateral constriction, PL 0.38–0.40 mm, PW 0.30 mm; anterior and lateral margins of discal part confluent and rounded; posterior margin only slightly arcuate; hind pronotal corners indistinctly marked, blunt and obtuse; posterior collar dorsally distinctly demarcated by sharply marked, narrow and strongly arcuate transverse groove connecting a pair of distinct, large subtriangular impressions; lateral marginal carinae well-visible in posterior half of pronotum. Punctures on pronotal disc and posterior collar very fine and inconspicuous; setae long, sparse and suberect to erect.

Elytra ( Fig. 97 ) oval and more convex than pronotum, broadest slightly anterior to middle, EL 0.75–0.85 mm, EW 0.55 mm, EI 1.36–1.55; humeral calli distinct, developed as elongate protuberances; elytral apices separately rounded. Punctures on elytral disc nearly as unremarkable as those on pronotum; setae long, sparse and suberect. Hind wings well-developed, twice as long as elytra.

Legs ( Fig. 97 ) long and slender; all tibiae straight or nearly straight, each metatibia with short and slender subapical setal brush.

Male. Unknown.

Distribution. Southeastern Australia: eastern New South Wales.

Remarks. Scydmaenilla sydneyana is most similar to S. brisbanensis ; see Remarks for the latter species.

A female of this species is deposited in the Franz Collection (NHMW), bearing a yellow identification label with printed " PARATYPUS " and the species name written in Franz's hand. In the original description (Franz 1975) it is clearly stated that this species is known from a single female only and deposited at SAM. Therefore, the specimen from NHMW is certainly not a paratype.

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).