Dissochaetus, Reitter, 1884

Peck, Stewart B. & Cook, Joyce, 2014, A review of the small carrion beetles and the round fungus beetles of the West Indies (Coleoptera: Leiodidae), with descriptions of two new genera and 61 new species., Insecta Mundi 2014 (397), pp. 1-76 : 9

Key to species of male Dissochaetus of the West Indies

1. Parameres inwardly curved apically ( Fig. 12, 18, 23 ); apex of median lobe of aedeagus drawn out, narrow at apex ............................................................................................................................ 2

— Parameres straight or weakly sinuate, not inwardly curved apically ( Fig. 15, 20, 21 ); median lobe of aedeagus not drawn out apically ........................................................................................... 4

2(1). Sternite lobes of male genital segment ( Fig. 17 ) strongly outwardly curved. Jamaica................ .................................................................................................................. D. jamaicensis Peck

— Sternite lobes of male genital segment otherwise ........................................................................ 3

3(2). Sternite lobes of male genital segment ( Fig. 14 ) narrow and straight, not setose. Cuba............. ......................................................................................................................... D. cubensis Peck

— Sternite lobes of male genital segment ( Fig. 24 ) angled inward and bearing setae medially. St. Lucia........................................................................... D. sanctalucia Peck and Cook , n.sp.

4(1). Apices of sternite lobes of male genital segment ( Fig. 19 ) rounded. Puerto Rico......................... .............................................................................................................. D. portoricensis Hatch

— Apices of sternite lobes of male genital segment ( Fig. 16, 22 ) acute ........................................... 5

5(4). Apical one-half of median lobe of aedeagus ( Fig. 15 ) broadly triangular. Grenada...................... ............................................................................................................ D. grenadensis Jeannel

— Apical one-half of median lobe of aedeagus ( Fig. 21 ) narrowly triangular. St. Vincent............... ....................................................................................................................... D. smithi Jeannel

Figures

Figures 12–24. Male genitalic structures of Dissochaetus. 12) Aedeagus, dorsal view with everted internal sac, of D. cubensis (from Peck 1999). 13) Median lobe of aedeagus, dorsal view with inverted internal sac, of D. cubensis (from Peck 1999). 14) Genital segment, ventral view, of D. cubensis (from Peck 1999). 15) Aedeagus, dorsal view, of D. grenadensis. 16) Genital segment, ventral view, of D. grenadensis. 17) Genital segment, ventral view, of D. jamaicensis (from Peck 1972). 18) Aedeagus, dorsal view, of D. jamaicensis (from Peck 1972). 19) Genital segment, ventral view, of D. portoricensis. 20) Aedeagus, dorsal view, of D. portoricensis. 21) Aedeagus, dorsal view, of D. smithi. 22) Genital segment, ventral view, of D. smithi. 23) Aedeagus, dorsal view, of D. sanctalucia. 24) Genital segment, ventral view, of D. sanctalucia. Scale line = 0.30 mm, Fig. 17-20; 0.35 mm, Fig. 15, 16, 21, 22; 0.40 mm, Fig. 12-14, 23, 24.