Typhloelmis

Barr, Cheryl B., Gibson, J. Randy & Diaz, Peter H., 2015, TyphloelmisBarr (Coleoptera: Elmidae: Elminae), a New Stygobiontic Riffle Beetle Genus with Three New Species from Texas, USA, The Coleopterists Bulletin 69 (4), pp. 531-558 : 531-558

KEY TO THE SPECIES OF TYPHLOELMIS

1. Longer than 4 mm; tibia of all legs with fringe of tomentum ( Figs. 8 , 12 ); pronotal lat- eral margins with rounded, evenly spaced teeth ( Figs. 8 , 15 , 18 ); prosternal process broad, triangular ( Fig. 18 ) ............ T. finegan

1′. Shorter than 3 mm; protibia with fringe of tomentum, lacking on meso- and metatibiae ( Figs. 9, 10 ); pronotal lateral margins uneven, with irregularly spaced granules or teeth ( Figs. 6, 7 , 13, 14 ); prosternal process narrow, elongate ( Figs. 16, 17 )................................... 2

2. Pronotum with few or no spinose granules anterolaterally ( Fig. 6 ); pronotal lateral margins with low, elongate granules ( Figs. 6 , 13 ); antennomere 3 wider at base than apex, closely appressed to antennomere 2 ( Figs. 13 , 16 ) ..... ........................................................ T. caroline

2′. Pronotum with numerous spinose granules anterolaterally ( Fig. 7 ); pronotal lateral margins with irregular, peg-like teeth ( Figs. 7 , 14 ); antennomere 3 wider at apex than base, not closely appressed to antennomere 2 ( Figs. 14 , 17 ) ............................................................. T. sanfelipe

Figures

Figs. 6–8. Typhloelmis species, adult dry specimens, dorsal view (length = pronotum + elytra). 6) T. caroline, ♂, length 2.2 mm; 7) T. sanfelipe, ♀, length 2.5 mm; 8) T. finegan, ♀, length 4.1 mm.

Figs. 11–12. Typhloelmis species, adult wet specimens. 11) T. sanfelipe, lateral view; 12) T. finegan, a) Dorsal view, b) Ventral view.

Figs. 13–15. Typhloelmis species, adult wet specimens, anterior dorsal view. 13) T. caroline; 14) T. sanfelipe;

Figs. 16–19. Typhloelmis species, adult wet specimens, ventral view. 16) T. caroline, anterior; 17) T. sanfelipe, anterior; 18) T. finegan, anterior; 19) T. sanfelipe, fused elytra.

Figs. 9–10. Typhloelmis species, adult wet specimens. 9) T. caroline, a) Dorsal view, b) Ventral view; 10) T. sanfelipe, a) Dorsal view, b) Ventral view.