Nothocyphon radula, Zwick, Peter, 2015

Zwick, Peter, 2015, Australian Marsh Beetles (Coleoptera: Scirtidae). 7. Genus Nothocyphon, new genus, Zootaxa 3981 (3), pp. 301-359 : 345-346

Nothocyphon radula , n. sp.

( Fig. 114 )

Type material: 1♂ holotype: Australia, TAS, nr. Humbug Hill nr Binalong Bay 13.Febr. 1980, Euc. Casuarina woodland, A.Newton, M.Thayer \ pyrethrin fogging Eucalyptus bark ( ANIC). Paratypes: 1♂: Australia Tasm. Hastings St. Res., nr Newdegate Cave 130m, 9.ii.1980, A.Newton, M.Thayer/ trapped in floating debris forest stream; 1♂: TAS, Fortescue Bay, Tasman Pen. wet scler. 7–9 II 1989 D.Bickel Malaise; 1♂: 43.07S 146.47E Edwards Rd TAS Hartz Mts 4.Feb.1983 I.D.Naumann J.C.Cardale coll. (all ANIC)

Habitus. BL 2.4–2.6mm, BL/BW ~1.85. The sides of the slender body are parallel over most of their length. The beetle is light to dark brown, rear of head and centre of pronotum darkest, appendages yellowish. Similar to N. triangulum .

Male. Segments 8 and 9 as for the genus. Penis slender and parallel, front of the pala little wider. Trigonium and parameroids occupy the caudal third of penis length. The trigonium is elongate, tongue-shaped, the gently curved sides and the blunt tip with small scale-like teeth. The slender parameroids are a little longer than the trigonium, narrowed to a rounded apex inclined mediad. The tegmen is a thin sclerite band that widens abruptly laterally and supports the wide obliquely triangular parameres provided with many coarse teeth.

Female. Unknown.

Note. A close relative of N. triangulum , both are endemic to Tasmania. They are easily distinguished by trigonium and parameres.

Etymology. The name radula (Latin, a rasp) is a noun in apposition describing the structure of the paramere.

Figures

FIGURES 112 – 114. Nothocyphon triangulum - group, males. N. triangulum, penis, tegmen and parameres in dorsoventral views: 112, ventral view, with contour of T 8 in the background; 113, dorsal view, with lobes of S 9. — N. radula, 114, penis, tegmen, parameres and S 9 in dorsal view. 112, 113 to the same scale.