Austrocyphon quadridens, Zwick, Peter, 2013

Zwick, Peter, 2013, Australian Marsh Beetles (Coleoptera: Scirtidae) 4. Two new genera, Austrocyphon and Tasmanocyphon, Zootaxa 3706 (1), pp. 1-74 : 28

Austrocyphon quadridens , sp. n.

( Figs. 72–75 )

Type material. Holotype: ♂, Illawarra, N. S. Wales G.E.Bryant 4.x.08 / G.Bryant coll. 1919-147 / pictus Blkb. ? Compared with type G. J. A. / Cyphon pictus Blackb. Id. by J.Armstrong ( NHML). Paratype: ♂, fenestratus Bl. (no other labels, body in poor shape; SAMA).

Habitus. BL 2.9 mm, elongate oval, BL/BW ~1.9. Uniformly brown, pronotal margin a bit rufous. Antennae (only the base is preserved) and legs light brown.

Male. T9 with long widely separated apodemes, disc completely transparent and soft, only two caudo-lateral spinulose tips clearly pigmented and visible. S9 short and wide, base triangular, sides widening caudad in a curve, then abruptly restricted towards the sclerotized narrow caudal margin with two sharp points separated by a shallow U-shaped notch.

Penis with narrow pala. Caudal part beyond base of trigonium much wider, forming a wide arch with narrow lateral and wide caudal sclerite strips. The membranous foramen inside this arch is much larger than the conical trigonium which carries a strong centema and some delicate apico-lateral spicules.

Parameres long slender struts originating from a transverse bar-like capulus and ending in delicate sharp tips which are medially connected to transparent membranous lobes.

Female. Not known.

Etymology. Before dissection, the tips of T8 and S9 were superimposed, appearing like four sharp teeth. The specific name (derived from Latin quatuor, four, and dens, tooth) is treated like a noun in apposition.

Figures

FIGURES 72 – 75. Austrocyphon quadridens sp. n., male. 72, T 9; 73, S 9; 74, penis; 75, tegmen and parameres. All to the same scale.