Eurycyphon barringtoni, 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 : 466-468

Eurycyphon barringtoni , n. sp.

( Figs. 43–48 )

Type material. 1♂ holotype: Barrington R. 4500 ft Dec. 1962 N.E.U. Exp. Soc. / ANIC Uni of New England coll. Donated 1983 [ NSW] ( ANIC).

Habitus. BL 4.5mm, BL/BW ~1.6. Dorsal side uniformly blackish, surface punctures a little larger than in E.

fulvus , closely resembling E. thungutti . Mandibles with minute tooth. Antenna (antennomeres 6–11 missing) apparently slender, antennomere 5 ~3 times longer than wide.

Male. Segments 8 and 9 as for the group ( Figs. 43–46 ). Pala long and wide, waisted near basal third, front truncate. Base of trigonium with convex sides, distal part parallel, ending in two lateral tips. Between the tip a narrow median process bends ventrad at almost right angle and is therefore barely visible in dorsoventral view. The parameroids are short, sclerotized, concave and bear sensory pores. The sclerotized tips are laterally connected to folded membranes. The rectangular tegmen surrounding the penis at a wide distance bears rudimentary styli ( Fig.

47). The apices of the parameres are three-dimensional cap-like structures with complex internal folds. In dorsoventral view a large beak-like process projects, at high magnification a few fine setae on its convex side are seen ( Fig. 48 ).

Note. E. falcatus and E. aquilus also have an anteriorly widened truncate pala. Both differ much in the penis and paramere tips ( Figs. 51 , 52 ).

Etymology. Named after the type locality, the name is treated like a dedication name, a Latin noun in the genitive case.

Figures

FIGURES 41 – 48. Eurycyphon spp., males, I. E. fulvus Watts: 41, ventral view of S 9 (part), tegmen and penis; 42, the same, apical portion of penis and tegmen, enlarged. E. barringtoni, n. sp.: 43, T 8; 44, T 9; 45, S 8; 46, S 9; 47, ventral view of tegmen and penis; 48, the same, apical portion, enlarged. 43 – 46 to the same scale. pa, pala; pd, parameroid; pe, paramere; st, stylus; tr, trigonium.

FIGURES 49 – 51. Eurycyphon spp., males, II. E. thunguttii, n. sp.: 49, ventral view of tegmen and penis; 50, the same, apical portion, enlarged. E. aquilus Watts: 51, apical portion of tegmen and penis. pa, pala; pd, parameroid; pe, paramere; st, stylus; tr, trigonium.

FIGURES 52 – 60. Eurycyphon spp., males, III. E. falcatus, n. sp.: 52, ventral view of tegmen and penis; 53, 54, apex of penis in ventral and lateral views, enlarged; 55, apex of tegmen and parameres enlarged; left half of figure in ventral, right half in dorsal view. E. tricornis, n. sp.: 56, antenna; 57, T 8; 58 S 8; 59, tegmen and parameres; 60, penis in dorsal view. 53 – 55, 57 – 58, and 59 – 60 to the same scales, respectively. pd, parameroid; pe, paramere; st, stylus; tr, trigonium.