Nanocyphon tasmanicus, Zwick, Peter, 2015

Zwick, Peter, 2015, Australian Marsh Beetles (Coleoptera: Scirtidae). 8. The new genera Cygnocyphon, Eximiocyphon, Paracyphon, Leptocyphon, Tectocyphon, and additions to Contacyphon de Gozis, Nanocyphon Zwick and Eurycyphon Watts, Zootaxa 3981 (4), pp. 451-490 : 483-484

publication ID	https://doi.org/ 10.11646/zootaxa.3981.4.1
publication LSID	lsid:zoobank.org:pub:EF71D83B-17B4-49CA-826E-D3A8E7979750
DOI	https://doi.org/10.5281/zenodo.6110584
persistent identifier	https://treatment.plazi.org/id/5C5BE52C-FFB1-BC5A-2CB5-FA82960E0912
treatment provided by	Plazi
scientific name	Nanocyphon tasmanicus
status	sp. nov.

Treatment

Nanocyphon tasmanicus , n. sp.

( Fig. 98 View FIGURES 97 – 98 )

Type material. Holotype ♂, 1♂ paratype: Australia, TAS Togari, 4km SSW 40°58'S, 144°50'E 9 February 1992 \ Tom Gush in dry leaf litter Tom Gush Collection 3480 ( ANIC).

Additional material studied. 1♀ taken with the type males ( ANIC). 3♀: West Tamar [ Australia, Tasmania, NW of Launceston, 41.44°S, 147.14° E] ( SAMA).

Habitus. Structure typical of genus, slender, BL 1.58–1.64mm, BL/BW ~1.9. Entirely light ochre.

Male. Typical of genus. Median plate of genitalia long and slender, parallel, vaguely concave immediately before the apex which is an approximately equilateral triangle with blunt tip and sharp rear corners ( Fig. 98 View FIGURES 97 – 98 ). The trigonium is relatively stout and short, about half the total length of the median plate. The parameroids are stout, very slightly sinuous, of approximately equal width but widening basally from the caudally rounded, knee-like apex which bears a small straight spine on the outside. The pala is rather short and wide, the widened truncate front does not reach the edge of the tegmen.

Female. Presently indistinguishable from N. australicus .

Notes. The genitalia of Nanocyphon tasmanicus resemble N. pumilus Zwick, 2013 from Irian Jaya in overall shape but details differ. The apex of the median plate of N. pumilus ( Fig. 97 View FIGURES 97 – 98 ) has concave sides and blunt corners, plate is slightly concave over its entire length. The trigonium is more slender and also longer in relation to the other parts, the pala reaches further forward. The parameres differ most clearly, they are straight and slender in N. pumilus, a deep subterminal notch on the outside and a small thin apex. N. pumilus is also smaller (BL 1.2mm) and stouter, BL/BW ~1.6.

Etymology. Named after the island where it lives and where N. tasmanicus appears to be widespread.