Fontidessus Miller and Spangler

Miller, Kelly B. & Spangler, Paul J., 2008, Fontidessus Miller and Spangler, a new genus of Bidessini from Venezuela (Coleoptera: Dytiscidae: Hydroporinae) with three new species, Zootaxa 1827, pp. 45-52 : 48

Key to the species of Fontidessus Miller and Spangler , new genus

1 Size small (TL <1.4mm); prosternal process apically pointed ( Figs 6, 7 ).................................................2

- Size larger (TL> 1.4mm); prosternal process apically truncate ( Fig. 5 )....................................................... ....................................................................................... F. toboganensis Miller and Spangler, new species

2 Prosternal process moderately elongate, lateral margins apically evenly tapered to pointed apex ( Fig. 6 ); elytral maculations ( Fig. 2 ) pale brown-yellow, diffuse and indistinctly demarcated; male median lobe not apically bifid ( Fig. 11 ), with small brush of setae subapically on ventral margin ( Fig. 12 ).......................... ...................................................................................................................... F. ornatus Miller, new species

- Prosternal process elongate, lateral margins apically slightly concave to sharply pointed apex ( Fig. 7 ); elytral maculations ( Fig. 3 ) bright yellow, distinctly demarcated; male median lobe apically broad and deeply bifid ( Fig. 14 ), without small brush of setae ( Fig. 15 ) ................................ F. wheeleri Miller, new species

Figures

FIGURES 1 – 7. Fontidessus species. 1 – 3) Dorsal habitus, 1) F. toboganensis, 2) F. ornatus, 3) F. wheeleri. 4) F. toboganensis, left metatrochanter and metafemur, anterior aspect. 5 – 7) prosternal process, 5) F. toboganensis, 6) F. ornatus, 7) F. wheeleri. Scale bar a = 1.0 mm for Figs 1 – 4. Scale bar b = 0.1 mm for Figs 5 – 7.

FIGURES 8 – 17. Fontidessus species. 8 – 10) F. toboganensis, male genitalia, 8) median lobe, dorsal aspect, 9) median lobe, right lateral aspect, 10) right lateral lobe, right lateral aspect. 11 – 13) F. ornatus, male genitalia, 11) median lobe and left lateral lobe, dorsal aspect, 12) median lobe, right lateral aspect, 13) right lateral lobe, right lateral aspect. 14 – 16) F. wheeleri, male genitalia, 14) median lobe and left lateral lobe, dorsal aspect, 15) median lobe, left lateral aspect, 16) right lateral lobe, right lateral aspect. 17) F. toboganensis, female genitalia, ventral aspect. Scale bars = 0.1 mm.