Austrocyphon crinitus

Zwick, Peter, 2013, Australian Marsh Beetles (Coleoptera: Scirtidae) 4. Two new genera, Austrocyphon and Tasmanocyphon, Zootaxa 3706 (1), pp. 1-74 : 64

Key to males of the A. crinitus -group

1 Huge hooks on the sides of T9 ( Fig. 215 ).................................................... A. hamatus , sp. n.

1' T9 different......................................................................................... 2

2 T8 entire, caudal margin convex, straight, or shallowly concave (e.g., Fig. 218 ).................................... 3

2' T8 caudally excised and of complex shape (Figs. 227, 228, 233)............................................... 4

3 Penis very long and slender, trigonium with apical hook-shaped centema ( Fig. 220 ). Parameres simple, with pointed apices. Adult taken under water (N. QLD)....................................................... A. submersus , sp. n.

3' Penis not strikingly slender, stout trigonium with apical tuft of spicules, no centema. Parameres long, their apices enlarged, with rasp-like armature ( Figs. 225, 226 )................................................ A. crinitus (Klausnitzer)

4 T9 carries two very long blades projecting from the body tip. They may curl and then resemble a screw ( Fig. 22 )............................................................................................... A. flagellifer , sp. n.

4' T9 transformed into two strongly curved rods with a few apical setae........................... A. enigmaticus , sp. n.

Figures

FIGURES 214 – 217. Austrocyphon hamatus sp. n., male. 214, T 8 and S 8 (partly concealed); 215, T 9; 216, S 9, tegmen, and parameres (fractioned, to fit on paper); 217, penis. All to the same scale.

FIGURES 218 – 220. Austrocyphon submersus sp. n., male. 218, T 8 and S 8; 219, superimposed T 9, tegmen with parameres, and S 9, ventral view; 220, penis. P, paramere; S 9, sternite 9; T, tegmen; T 9, tergite 9. All to the same scale.

FIGURES 221 – 226. Austrocyphon crinitus (Klausnitzer), male. 221, T 8; 222, T 9; 223, S 9; 224, penis; 225, distal half of penis, magnified; 226, tegmen and parameres. 221 – 224 and 226 to the same scale.

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.