Neobidessodes

HENDRICH, LARS, HAWLITSCHEK, OLIVER & BALKE, MICHAEL, 2009, The epigean Australasian species of Neobidessodes gen. n. diving beetles- a revision integrating morphology, cybertaxonomy, DNA taxonomy and phylogeny (Coleoptera: Dytiscidae, Bidessini), Zootaxa 2288 (1), pp. 1-41 : 38-39

Key to epigean species of Neobidessodes

1. Length> 3.7 mm. Elytron with a subapical lateral flange, pronotal striae very weak, N WA, NT, N QLD … grossus

- Length < 3.7 mm........................................................................................................................................................... 2

2. Elytron with a subapical lateral tooth ( Fig. 21), pronotal striae well marked, WA, NT, QLD, N NSW.... denticulatus

- Elytron lacking lateral tooth; pronotal striae present or absent .................................................................................... 3

3. Pronotal striae absent .................................................................................................................................................... 4

- Pronotal striae present................................................................................................................................................... 5

4. Length 2.55–2.65 mm, outline of junction of pronotum and elytra smooth, sides of pronotum evenly curved, maximum width at posterior angles, dorsal colour pattern usually diffuse ( Fig. 7), N WA, NT, N QLD............... mjobergi

- Length 2.75–2.9 mm, outline of junction of pronotum and elytra slightly sinuate, maximum width of pronotum somewhat before base. Dorsal colour pattern strongly varying, when present, usually well marked ( Fig. 9). In some specimens pronotum yellow ( Figs 11, 12) in others pronotum and elytra all black ( Fig. 10), N WA, NT, N QLD..................................................................................................................................................................... thoracicus sp.n.

5. Males with mesotarsus curved. Pronotal striae moderately marked, dorsal colour pattern usually diffuse ( Fig. 8), length 2.2–2.25 mm, VIC, NSW, S QLD................................................................................................................ bilita

- Males with mesotarsus straight, contrasting yellowish markings on black elytra ( Figs 3, 4, 5) ................................. 6

6. Pronotal striae short but well marked ( Fig. 5), smallest species of the genus (length 2.0 mm), West Papua, Indonesia................................................................................................................................................................. samkrisi sp.n.

- Pronotal striae extremely weak and faint ( Figs 3, 4), length 2.35–2.65 mm, N WA, NT, N QLD........... flavosignatus