Dissochaetus grenadensis Jeannel 1936

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 : 10

Dissochaetus grenadensis Jeannel 1936

Figures 15, 16

Dissochaetus grenadensis Jeannel 1936: 154 . Holotype male in BMNH, not seen. Type locality: St. John’s River , Grenada Island.

Diagnosis. Total length 1.9–2.5 mm. Dark brown; mouthparts, antennae and legs paler; pubescence reddish yellow. Head finely, densely punctate. Antennae when laid back reaching beyond base of pronotum. Antennomeres VI–X wider than long. Eyes large. Pronotum granulate, transverse, widest at basal onethird; sides rounded, posterior angles roundly obtuse. Elytral sides evenly rounded, apices separately evenly rounded. Fully winged. Large metatibial spur longer than first metatarsal segment. Male first protarsomere about as wide as protibial apex. Median lobe of aedeagus ( Fig. 15 ) evenly triangular in apical one-half, with three pairs of short lateral setae before apex. Parameres ( Fig. 15 ) weakly sinuate, extending beyond apex of median lobe, each bearing two apical setae. Inverted internal sac ( Fig. 15 ) with two pairs of elongate sclerotized structures. Male genital segment ( Fig. 16 ) longer than wide; sternite lobes with short, broad, triangular projections bearing long setae; pleurite lobes not divided, each bearing long setae.

Distribution. Known only from Grenada. Previously known localities (from Jeannel 1936). Grenada ( Island). St. John’s River and Grand Etang, collected by H. H. Smith.

New records. Grenada. Grand Etang Forest Reserve . N12°04.846’, W61°42.333’, 9–28.VIII. 2010, 360m, for. malaise, S. Peck, 10-60 (1, SBPC) ; N12°04.846’, W61°42.333’, 9-28.VIII. 2010, 360m, rain for. FIT, S. Peck, 10-61 (6, SBPC) ; N12°04.162’, W61°42.162’, 10–28.VIII. 2010, 400m, rain for. malaise, S. Peck, 10- 62 (2, SBPC) ; N12°04.162’, W61°42.162’, 10–28.VIII. 2010, 400m, rain for. FIT, S. Peck, 10-63 (13, SBPC) ; N12°04.162’, W61°42.162’, 15–18.VIII. 2010, 400m, rain for. carrion tp., S. Peck, 10-70 (18, SBPC) ; N12°04.846’, W61°42.333’, 15–18.VIII. 2010, 360m, rain for. carrion tp., S. Peck, 10-71 (13, SBPC; 3, MCZC; 3, FSCA; 3, FMNH) .

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.