Dissochaetus jamaicensis Peck 1972

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 : 11

Dissochaetus jamaicensis Peck 1972

Figures 17, 18

Dissochaetus jamaicensis Peck 1972: 50 ; 1978: 244. Holotype male in MCZC, seen. Type locality: Hardwar Gap, St. Andrew Parish, Jamaica.

Diagnosis. Total length 2.3–2.8 mm. Dark brown; mouthparts, basal antennomeres, apex of antennomere XI, legs and elytral bases paler; pubescence reddish yellow. Head finely, densely punctate. Antennae when laid back reaching basal one-fifth of elytra; antennomeres VII, IX, and X slightly wider than long. Eyes large. Pronotum granulate, transverse, widest at basal one-third; sides rounded, posterior angles obtuse. Elytral sides evenly rounded, apices separately evenly rounded. Fully winged. Large metatibial spur longer than first metatarsal segment. Male first protarsomere wider than protibial apex. Median lobe of aedeagus ( Fig. 18 ) elongate, drawn out apically. Parameres ( Fig. 18 ) extend beyond apex of median lobe, inwardly curved apically; each paramere bearing two apical setae. Inverted internal sac ( Fig. 18 ) with several pairs of sclerites. Male genital segment ( Fig. 17 ) longer than wide; sternite lobes narrow, curved outward; pleurites bilobed, lobes bearing long setae.

Distribution. Known only from Jamaica. Previously known localities, from Peck (1972, 1978) are: Jamaica. Portland Parish. 1 mi W Ecclesdown. St. Andrew Parish. Greenwich, near Newcastle. Hardwar Gap. Hermitage Dam. New Castle. St. Ann Parish. 3 mi N Ewarton. St. Thomas Parish. Portland Gap at 5500 feet [1675m], and 4500 feet [1372m]. Whitfield Hall. Corn Puss Gap, 4 mi N Bath.

New records. Jamaica, Trelawny, Win[d]sor Caves, 24.III–02.IV.1991, T.K. Phillips, FIT (1, WIBF).

Remarks. The species has been taken in baited traps in forests from 457 to 1675 m elevation, and in leaf litter and at guano in an abandoned mine.

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.