Euconnus (Napochus) yadhaigana, Jałoszyński, Paweł, 2015

Jałoszyński, Paweł, 2015, Taxonomy of ' Euconnus complex'. Part III. Morphology of Euconnus subgenus Napochus and revision of the Australian species (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 3925 (1), pp. 1-24 : 16-17

Euconnus (Napochus) yadhaigana sp. n.

( Figs. 29 , 43–44, 61)

Type material studied. Holotype: AUSTRALIA (Queensland): ♂, three labels: " 17.52S 146.04E QLD / S1 Mission Beach / 4 Nov-2 Dec 1996 / M.Cermak. 40m / Pitfall traps" [white, printed], " ANIC / specimen" [green, printed], " Euconnus / ( Napochus ) / yadhaigana m. / det. P. JAŁOSZYŃSKI, '15" [red, printed] ( ANIC). Paratypes (2 ♂♂): 1 ♂, " 17.52S 146.04E QLD / S1 Mission Beach / 4 Mar-1 Apr 1996 /M.Cermak. 40m / FI Trap (JCU)" [white, printed], " ANIC / specimen" [green, printed]; 1 ♂, " 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 1114 / leaf litter & / flood debris / closed forest" [white, printed], " ANIC / specimen" [green, printed] (paratypes in ANIC and cPJ).

Diagnosis. Small species, BL 1.15–1.16 mm; aedeagus in ventral view with broad ventral apical projection gradually broadening from base to subapical region and then rapidly narrowing toward subtriangular apex, not reaching apex of dorsal apical projection, internal lateral projections moderately broad, subtriangular, distinctly shorter than ventral apical projection and divergent distally; external lateral projections barely discernible; in lateral view ventral apical projection not curved, while dorsal apical projection strongly curved dorsally; parameres with slightly expanded apices.

Description. Body of male ( Fig. 29 ) strongly convex but with slightly flattened elytral dorsum, elongate, with long appendages, BL 1.15–1.16 mm (mean 1.15 mm); glossy, uniformly light brown; vestiture slightly lighter than cuticle.

Head rhomboidal, broadest at eyes, HL 0.20, HW 0.25; vertex and frons confluent, convex; supraantennal tubercles feebly marked; eyes large, strongly convex and coarsely faceted. Punctures on vertex and frons distinct but small and shallow; setae long, dense, suberect to erect, additionally tempora and vertex with long and dense bristles directed posteriorly. Antennae short, AnL 0.49–0.50 mm (mean 0.50 mm); antennomeres I–II elongate, III–VII slightly transverse, VII about as long as broad, VIII–X strongly transverse, antennomere XI about as long as broad.

Pronotum in dorsal view subtrapezoidal, broadest at base and strongly narrowing anteriorly, PL 0.28–0.30 mm (mean 0.29 mm), PW 0.31; antebasal pits and transverse groove barely discernible. Punctures on pronotal disc fine and inconspicuous; setae fine and on sides obscured by dense, long and thick bristles.

Elytra suboval and slightly flattened, broadest near middle, EL 0.65–0.68 mm (mean 0.66 mm), EW 0.51–0.55 mm (mean 0.54 mm), EI 1.20–1.27; basal impressions shallow but distinct, humeri elongate; apices separately rounded. Punctures on elytral disc fine and shallow; setae long, sparse and strongly erect. Hind wings welldeveloped, twice as long as elytra.

Legs long and slender; unmodified.

Aedeagus (Figs. 43–44) relatively slender, AeL 0.25 mm, in ventral view with abruptly delimited and long apical part; ventral apical projection elongate and broad, pentagonal with all corners well-marked, gradually broadening from base to subapical region and then rapidly narrowing to form broadly triangular apex, in ventral view not reaching apex of dorsal apical projection; only dorsal apical projection bent dorsally at an obtuse angle; internal and external lateral projections similar in shape (external projections barely discernible), subtriangular and divergent distally. Parameres narrow, in lateral view with barely broadened apical parts, each with 2 long apical setae.

Female. Unknown or indistinguishable from similar species (see discussion).

Distribution. N Queensland ( Fig. 61 ).

Etymology. The name yadhaigana (a noun in apposition) refers to the Aboriginal tribe inhabiting the Cape York Peninsula, Yadhaigana people.

Figures

FIGURES 24 – 34. Napochus of Australia; dorsal habitus (24 – 25, 28 – 34) and original labels of holotypes (26 – 27). Euconnus palmwoodianus (Franz) (24, 26), E. pisoniae Franz (25, 27), E. setiphallus sp. n. (28), E. yadhaigana sp. n. (29), E. microlaminatus sp. n. (30), E. feeneyi feeneyi sp. n. (31, 32), E. feeneyi parallelilaminatus ssp. n. (33, 34).

FIGURES 57 – 64. Distribution of Napochus in Australia. Euconnus palmwoodianus (Franz) (57, 58), E. pisoniae Franz (59), E. setiphallus sp. n. (60), E. yadhaigana sp. n. (61), E. microlaminatus sp. n. (62), E. feeneyi feeneyi sp. n. (63), E. feeneyi parallelilaminatus ssp. n. (64).