Austrocyphon linguatus, Zwick, Peter, 2013

Zwick, Peter, 2013, Australian Marsh Beetles (Coleoptera: Scirtidae) 4. Two new genera, Austrocyphon and Tasmanocyphon, Zootaxa 3706 (1), pp. 1-74 : 22

Austrocyphon linguatus , sp. n.

( Figs. 50–53 )

Type material. TAS: Holotype: ♂, Huon R. TAS Lea / Tasmania 8825 ( SAMA). Paratypes: 1♂ same data as holotype; 1♂: Tasmania; 1♂, Arve River Picnic area TAS Geeveston 3/12/00, C.H.S.Watts; 1♂, TAS Black River 5km NW Mawbanna 27/11/00, C.H.S.Watts; 1♂, TAS Hatfield River 15km S Waratah 28/11/00, C.H.S.Watts (all SAMA). 3♂, Launceston T. J.M.Littler / Cyphon doctus Lea id. by J.Armstrong; 4♂, Kelso, Tas. / 250 / Cyphon doctus Lea id. by J.Armstrong ( QMSB, type numbers T169579-T169584 & T 183322). 3♂, Launceston T. J.M.Littler / Cyphon doctus Lea id. by J.Armstrong; 1♂, Kelso, Tas. / Cyphon doctus Lea id. by J.Armstrong ( ANIC). 5♂, NW TAS, Mackintosh R. NE of Rosebery, 0 2.12.1972, P.Zwick; 3♂, TAS, Clarence R., 13.5°C, 4.12.1972, P.Zwick; 1♂, Central TAS, Clarence R. E of Derwent Bridge, 0 4.12.1972, P.Zwick (PZ). None of the presumed females has type status.

Additional material studied. TAS: 3♂, C.E.Cole Launceston 29.9.17; Armstrong det. doctus Lea (MV).

Habitus. BL 2.3–2.5 mm, BL/BW ca. 1.9. Similar to A. doctus , also in the variable elytral pattern. A uniformly brown specimen was also observed.

Male. Caudolateral claws of T9 backward-directed, slender, separated from the plate by deep notches. Plate extended into a bare tongue about four times as long as wide at base and twice as long as sides of tergite, parallel, or a little widened caudad, with V-shaped notch. S9 broadly oval, base narrow, caudal edge with wide shallow notch. Socketed setae occur in caudal third, those along rear edge longest.

Pala as long as distal portion of penis. Trigonium parallel, caudally truncate with sharp claw-shaped centema, distinct spinules next to it. Laterally, the fused parameroids form a wide upcurved flange with some spicules, caudal portion of frame narrow.

Parameres V-shaped, well sclerotized, unusally short, apices with two sharp tips.

Female. Females taken together with males of the similar species A. doctus , A. perdoctus , or A. linguatus cannot be distinguished and are not listed.

Etymology. Named for the shape of T9: Latin linguatus —“provided with a tongue.”

Figures

FIGURES 50 – 53. Austrocyphon linguatus sp. n., male. 50, T 8; 51, pecten and setae along rear margin of T 8 (diagrammatic); 52, T 9 and S 9; 53, penis and parameres, dorsal view. 51 not to scale, the others to the same scale.