Prionocyphon latusmandibularis Watts, 2010b

Zwick, Peter, 2016, Australian Marsh Beetles (Coleoptera: Scirtidae). 9. The relations of Australasian Ypsiloncyphon species to their Asian congeners, additions, mainly to Petrocyphon and Prionocyphon, and a key to Australian genera of Scirtinae, Zootaxa 4085 (2), pp. 151-198 : 172

Prionocyphon latusmandibularis Watts, 2010b

( Table 2)

Material studied. 1♀: AUSTRALIA Tas. track off Mt. Barrow rd. 780m 15 - 17.11.1980 Nothofagus etc. A. Newton, M.Thayer / Pyrethrin fogging tree ferns; 1♂, 1♀: SW Tasmania, Lower Gordon R. 42.31S 145.45E 42.32S 145.47E Howard, Hill, ... \ H.E.C. Survey 3R. 1308 Jan. 1978 Ross ( ANIC) ; 1♀: Florentine Valley TAS White Gum Flora Res . 3 Feb. 1972 C.Reid beating rainf.trees; 2♂: 41.18S 145.36E TAS Saxons Road 17 Jan.-1 Feb.1983 I.Naumann/J.Cardale ex pantrap (all ANIC). 2♀: Mt. Wellington Tas: Lea \ Cyphon 8813 Tasmania; 1♀: 3525 \ Tasmania A.Simson (all SAMA).

P. latusmandibularis is an isolated species with many unique characters ( Watts 2010b) and stands by itself. It is derived in possessing prominent projections of the frontoclypeus but shares none of the apomorphies characteristic of the following species ( Table 2).

Female. Recognized by the enlarged mandibles. Sternites 3−6 connate and forming deep stiff trough to which S7 is hinged. Antecosta of S7 with two paramedian knobs resembling short apodemes. S6 with central oblique porus with strongly sclerotized dark walls. Ovipositor normal, coxites and stylites slender. Apodemes of S8 slightly sinuous, lyre-shaped, at front end approaching but not visibly connected. Short section of gonoduct annulate ('concertinated') and internally covered with what seem to be dense microtrichia or hair-like spinules. Bursal sclerite not observed, the bursella itself hyaline, surface with several large areas of smooth cuticle with microridges along edges.