Rhabdomastix (Rhabdomastix) dobrotworskyi Theischinger & Billingham, 2019

Theischinger, Günther, Billingham, Zacariah D., Martin, John & Growns, Ivor, 2019, The genus Rhabdomastix Skuse in Australia (Diptera: Tipuloidea: Limoniidae), Zootaxa 4661 (1), pp. 65-100 : 74-76

Rhabdomastix (Rhabdomastix) dobrotworskyi Theischinger & Billingham , sp. nov.

( Figs. 17–20 )

Material examined. Holotype ♂: Australia, Queensland, Camp Mt , 2–iv–1967, N. Dobrotworsky ( ANIC); speci- men dry, pinned, terminalia preserved (glycerol) in microvial on the pin . Paratypes: 1 ♂, 1 sn, Australia, Queensland, Camp Mt , 2–iv–1967, N. Dobrotworsky ( ANIC) .

Description. Male ( Figs. 17–20 ). Head. Largely, including rostrum and palps, greyish brown. Antenna dark brown, 1.0– 1.2 mm long; pedicel approximately as long as flagellomeres; f1 stoutly conical, f3 about three times as long as wide; verticils markedly longer than flagellomeres; some rather long pubescence.

Thorax. Largely, including legs, pale brown; a spot each side on frontal face of prescutum and in each humeral pit much darker.

Wing. Veins R 4 and R 5 apically diverging; M 1+2 distinctly curved; dm similar in length to vein M 4; vein A 2 slightly sinuous, short, ending well before level origin of Rs; anal angle moderately distinct. Membrane slightly suffused with pale brown, darkened to greyish brown in pterostigma area. Halter with stem dull yellow, knob pale greyish brown.

Abdomen. Largely pale brown, even paler between tergites and sternites, terminal segments markedly darker.

Terminalia. Gonocoxite about three times as long as wide. Outer gonostylus less than half as long as gonocoxite, slim, very slightly arched, largely parallel-sided and produced into obtuse cone posteromedially, and about 1.5 times as long as, and half as wide as, inner gonostylus that is gradually attenuated to a conical tip. Interbase pointed, rather slightly and evenly arched. Aedeagus apically slightly widened, vesica longer than wide, apodeme shorter than both but still rather long, wedge-like.

Dimensions. Wing length 3.3–3.5 mm.

Female unknown.

Distribution. Eastern: Queensland ( Map 1 ).

Etymology. This species is dedicated to the great student of Australian Tipulidae N.V. Dobtrotworsky (1903– 1981).

Discussion. The antennae of male R. (R.) dobrotworskyi agree rather closely only with R. borroloola . However, they are longer (approximately 1 mm) with longer, only moderately stout flagellomeres (f3 about three times as long as wide). Also of diagnostic value are the rather slim outer gonostyli with apex slightly curved, posteromedially produced and markedly longer than inner gonostyli that are posteriorly produced into a moderately long cone, and the slightly curved and subapically only slightly widened interbases.

Figures

MAP 1. Distribution of the Australian species of Rhabdomastix (Rhabdomastix) ostensackeni group. R. borroloola sp. nov. R. dobrotworskyi sp. nov. R. dooragana sp. nov. R. hirsuta sp. nov. R. minima R. nivalis sp. nov. R. ostensackeni R. ponticulus sp. nov.

FIGURES 17–20. Rhabdomastix (Rhabdomastix) dobrotworskyi sp. nov., male. 17: wing; 18, 19: antennae; 18: total; 19: base; 20: terminalia, dorsal view. Scale bar = 0.2 mm.