Dissochaetus smithi 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 : 12

Dissochaetus smithi Jeannel 1936

Figures 21, 22

Dissochaetus smithi Jeannel 1936: 154 . Holotype male in BMNH, not seen. Type locality: St. Vincent (West Indies).

Diagnosis. Total length 2.1–2.6 mm. Dark brown; mouthparts, antenomeres I–IV and apex of XI, and tarsi paler. Apical one-half of elytra with slight pruinosity. Pubescence reddish yellow. Head finely, densely punctate. Antennae reach beyond base of pronotum. Antennomeres VI–X wider than long. Eyes large. Pronotum granulate, transverse, widest at basal one-third; sides rounded, posterior angles obtuse. Elytral sides weakly rounded, apices separately evenly rounded. Fully winged. Large metatibial spur longer than first metatarsal segment. Male first protarsal segment narrower than protibial apex. Median lobe of aedeagus ( Fig. 21 ) elongate, narrowly triangular in apical one-half. Parameres ( Fig. 21 ) straight, extending beyond apex of median lobe, each bearing two apical setae. Inverted internal sac ( Fig. 21 ) with two pairs of sclerotized structures. Male genital segment ( Fig. 22 ) longer than wide; sternal lobes with short triangular projections bearing several setae; pleurite lobes not divided, each bearing setae.

Distribution. Known only from St. Vincent. Previously known localities (from Jeannel 1936) are: St. Vincent (no additional details), collected by H. H. Smith.

New records. St. Vincent. Hermitage Forest , E. of Spring Village, N13°14.86’ W61°12.77’, 15–27.VIII.2006, forest edge FIT, 348m, S. & J. Peck, 06-102B (3, SBPC) ; Hermitage Forest , E. of Spring Village, N13°14.86’ W61°12.77’, 18–23.VIII.2006, forest carrion traps, 350m, S. & J. Peck, 06-108 (12, SBPC) ; Vermont Nature Trails, E. of Layou , N13°13’ W61°13’, 19–24.VIII.2006, carrion bait traps, 360m, S. & J. Peck, 06- 112 (7, SBPC) .

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.