Eurycyphon parvus, 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 : 474-476

Eurycyphon parvus , n. sp.

( Figs. 74, 75 )

Type material: 1♂ Holotype: 32.08S 151.27E Allyn River Chichester S.F. NSW 10-11 Nov. 1981 T.Weir \ by sweeping ( ANIC).

Habitus. BL 1.9mm, BL/BW ~1.5. Shape typical of genus. Entirely brown, appendages yellowish brown. Head and pronotum finely punctate, punctures on pronotum very widely spaced, surface shining. Punctures on scutellum and elytra large, widely spaced, especially near base of elytra. Dorsal pilosity strong, appearing bristly, the almost erect brown hairs are curved. Antennae short, base unmodified, antennomeres 4–11 stout, each barely longer than wide at tip. End segment of maxillary palpus bottle-shaped, of labial palpus bean-shaped and standing at an angle on the oblique end face of the penultimate segment ( Fig. 74 ).

Male ( Fig. 75 ). T8 as for genus (broken line in Fig. 75 ), apodemes short and slender. S8 not observed. T9 is a bare unpigmented sclerite whose long lateral rods seem to form a common basal loop instead of the usual separate apodemes. S9 wider than tergite, with some long thin true hairs. The tegmen seems to be a simple arched sclerite which widens caudolaterally to form straight parameres; small sensory pores are visible in the respective area. The styles are triangular plates with finely frazzled caudal margin. They are separated by a squarish notch. The very wide pala is semicircularly excised in front. Trigonium short, triangular, without any armature. The distinctly longer parameroids are slender rods, apex a little expanded to the outside, with numerous sensory pores.

Female. Unknown.

Note. Attempts to separate the terminalia during dissection of the only known specimen failed, and they remain superimposed in the slide. Therefore, not all details are clearly visible, the relationship of the triangular serrate styles to the other parts is not clear. The apodemes of T9 seem to be anteriorly connected, loop-like, which is exceptional. There is no similar species.

Etymology. The Latin adjective parvus , small, describes the size of the beetle.

Figures

FIGURES 68 – 75. Eurycyphon spp., V. E. perlatus, n. sp., male: 68, T 8; 69, T 9; 70, distal portion of S 9; 71, tegmen and parameres; 72, penis. Female: 73, prehensor; 68 – 72 to the same scale. E. parvus, n. sp., male: 74, head, with details of palpi; 75, the superimposed terminalia. pe, paramere; st, stylus.