Austrocyphon

Zwick, Peter, 2013, Australian Marsh Beetles (Coleoptera: Scirtidae) 4. Two new genera, Austrocyphon and Tasmanocyphon, Zootaxa 3706 (1), pp. 1-74 : 7

Key to genera of the Austrocyphon -complex

1 Tip of prosternal keel widened, elongate-oval, pilose. Trigonium flat, simple, finger-shaped, without crest and lateral appendages, at best gently curved. At its end is a claw-shaped centema or a group of fine spicules. The frame formed by the parameroids around the trigonium may be flanged, with its sides curved dorsad. Tegmen and parameres form a thin U-shaped sclerite with delicate ends, no sclerotized hooks (e.g., Figs. 7 , 22 , 26 , 69, 192, 202, 231).............. Austrocyphon , gen. n., p. 7

1' Prosternal keel apically not widened, blade-shaped over entire length, bare. Penis with large caudally widened spatulate plate formed by the fused parameroids which basolaterally support a curved, pointed appendage. Trigonium long, waisted, with serrate crest, in side view strongly angled. Paramere tip divided, one branch a membranous lobe, the other a recurved hook ( Figs. 242–244 )........................................................ Tasmanocyphon heideae , gen. et sp. n., p. 71

Figures

FIGURES 6 – 9. Austrocyphon genitalia. 6, 7, Austrocyphon ovensensis, male from VIC, Yarra Junction: 6, abdominal tip with everted genitalia in side view; 7, penis in ventral view; broken line indicates dorsal flange of frame. Not to scale. 8, 9, A. doctus (Lea), female: 8, segment 8 and ovipositor in dorsal view; not to scale. 9, wall of accessory gland of genitalia (cleared), diagrammatic combination of surface view and optical section through edge. C, centema; fo, foramen; gs, gonostyle; gx, gonoxocite; op, apodeme of ovipositor; P, pala; Pe, parameroid; S, sternite (with ordinal number); sp, spur; T, tergite (with ordinal number); Tn, tegmen; Tr, trigonium.

FIGURES 17 – 23. Austrocyphon pictus (Blackburn), male. 17, habitus; left half shows the pattern of a pale specimen, right half of figure of a dark specimen. 18, S 8; 19, T 9, dorsal; 20, ventral view of right half of T 9 to show denticle row on middle lobe (ml), dorsal lobe (dl) in background, ventral lobe (vl) diagrammatically shown as transparent; 21, S 9; 22, penis with terminal section of vas deferens; 23, penis with parameres. 17 – 19 and 21 – 23 to the same scale.

FIGURES 24 – 31. Austrocyphon bifidus sp. n. (24 – 27, male) and A. bidens sp. n. (28 – 30, male; 31, female). 24, T 9; 25, S 9; 26, penis; 27, tegmen and parameres. 28, S 8, T 8 and T 9 (from bottom to top); 29, S 9; 30, penis and tegmen with parameres. 31, structure recovered from inside oviduct. All to the same scale.

FIGURES 237 – 245. Tasmanocyphon heideae gen. et sp. n., male. 237, antenna; 238, T 8; 239, S 8; 240, tegmen and parameres; 241, S 9; 242, penis, ventral view; 243, same, lateral view; 244, detail of appendage of parameroid; 245, habitus. 237 – 243 to the same scale, 244, 245 not to scale.