Nesocyrtosoma productum Hopp and Ivie

Hopp, Katie J. & Ivie, Michael A., 2009, A Revision Of The West Indian Genus Nesocyrtosoma Marcuzzi (Coleoptera: Tenebrionidae), The Coleopterists Bulletin (mo 8) 63, pp. 1-138 : 67

Nesocyrtosoma productum Hopp and Ivie , New Species ( Figs. 221–224 , 264 )

Type Material. HOLOTYPE: Female. DOMIN. REP: Prov. La Vega; LaCienega, Parque Nac. HQ; 19u049N, 70u 529W. 1,100m; Rio Yaque N. 04APR1992; M. A. Ivie, D.Sikes, W.Lanier. (from WIBF, deposited in NMNH) . PARATYPE (1 specimen): DOMIN.REP: Prov.LaVega; La Cienega, 1,100 m; 19u 04.079N, 70u 51.689W; 29 JULY 1999, at light; M.A.Ivie and K.A.Guererro. (1 WIBF).

Diagnosis. This species can be distinguished by its shiny golden-bronze to dark ferrugineous color, anterior angles of the pronotum acute and extremely produced ( Fig. 223 ), and interstriae densely punctate, the punctures moderately impressed ( Figs. 221, 223 ).

Description (female). 4.0–5.0 mm long, 2.0– 2.5 mm wide. Small, short, ovate moderately convex ( Figs. 221, 222 ). Shining golden-bronze to dark ferrugineous; antennae, mouthparts and tarsi light ferrugineous. Head moderately punctate dorsally; punctures smaller than a single eye facet, slightly impressed; extremely short golden seta emerging from each puncture. Antenna clavate, antennomeres 7–10 transverse, forming a loose club; apical antennomere subcircular; antennomeres 7–11 with stellate sensoria. Mentum with acute median keel raised anteriorly to a point ( Figs. 10, 12 ). Ventral portion of eye reaching subgenal sulcus ( Fig. 9 ); postgena without distinct punctures. Dorsal surface of pronotum moderately punctate; punctures separated by 0.5–1.0 diameters. Pronotal marginal bead complete laterally, anterior margin with marginal bead effaced medially, posterior margin lacking marginal bead; anterior angles of pronotum acute, strongly produced and apically narrowly rounded; lateral edge of pronotum evenly curved to base; pronotum evenly convex ( Fig. 223 ). Hypomeron without distinct punctures. Prosternal process ends in rounded form that abuts the anterior face of the mesoventrite, marginal grooves opposite coxae indistinct, not joined apically ( Fig. 224 ). Elytral striae lightly impressed, present as rows of small punctures separated by 0.5–1.0 3 diameter, with a lightly impressed line through the middle of each puncture row; elytral interstriae flat, densely punctate, punctures moderately impressed; scutellary striae 4 punctures long; scutellum triangular, normal ( Figs. 221, 223 ). Mesoventrite broad antero-posteriorly, weakly U-shaped, weakly excavate to receive prosternal process; metaventrite subequal to antero-postero length of mesocoxa ( Fig. 224 ). Metathoracic wing fully developed. Legs short, punctate; all but mesofemora reaching beyond edge of elytron; tibia straight. Abdominal depressions on 4th and 5th ventrites reduced to indistinct slits ( Fig. 74 ); intercoxal process of first ventrite rounded with apical nipple; ventral surface densely punctate, punctures weakly impressed ( Fig. 224 ).

Male. No males were available for study.

Biology. This species has been taken at light in moist forest and beating vegetation at night.

Distribution. This species is endemic to Hispaniola. It has been collected at La Ciénaga in the province of La Vega of the Dominican Republic ( Figs. 260 , 264 ).

Etymology. This species has the anterior angles of the pronotum extremely produced, and is thus called productum .

Figures

Figs. 217–224. 217–220: Nesocyrtosoma nearnsi. 217) Habitus, dorsal; 218) Habitus, lateral; 219) Pronotum; 220) Thoracic sterna. 221–224: Nesocyrtosoma productum. 221) Habitus, dorsal; 222) Habitus, lateral; 223) Pronotum; 224) Thoracic sterna.

Figs. 262–264. Nesocyrtosoma species distribution maps. 262) Distributions of N. bestiola, N. ferruginea, N. merkli, N. altagracia, N. basilense, N. dolosum, N. darlingtoni, N. cristalense, and N. dentatum; 263) Distributions of N. virens, N. purpureum, N. crenulatum, N. otus, and N. elongatum; 264) Distributions of N. tumefactum, N. turquinense, N. scabrosum, N. simplex, N. parallelum, N. fernandoi, N. serratum, N. teresitae, and N. productum.

Figs. 10–18. 10–13: Ventral portion of head. 10) Nesocyrtosoma guerreroi ocular depression; 11) Nesocyrtosoma bankense ocular depression; 12) Nesocyrtosoma virens distinct postgenal punctures; 13) Nesocyrtosoma otus median keel of mentum broad. 14–18: Antenna. 14) Nesocyrtosoma crenulatum with antennomeres 10 and 11 with stellate sensoria; 15) Nesocyrtosoma guerreroi with antenna clavate, apical six antennomeres enlarged to form club; 16) Nesocyrtosoma crenulatum with antenna moderately clavate, apical six antennomeres enlarged to form club; 17) Nesocyrtosoma inflatum with antenna weakly clavate, nearly filiform, apical six antennomeres enlarged to form club; 18) Strongylium atrum with filiform antenna.

Figs. 5–9. 5–7: Mandible of Nesocyrtosoma hispaniolae. 5) View from back; 6) View from side; 7) View from front. 8–9: Ventral portion of eye. 8) Nesocyrtosoma lacrima with ventral portion of eye not reaching the subgenal sulcus; 9) Nesocyrtosoma darlingtoni with ventral portion of eye reaching the subgenal sulcus.

Figs. 74–76. Abdominal characters. 74) Nesocyrtosoma inflatum with abdominal depressions on 4th and 5th ventrites reduced to indistinct slits (AbS 5 abdominal slits); 75) Nesocyrtosoma otus with abdominal depressions on 4th and 5th ventrites present as impressed pits (AbP 5 abdominal pits); 76) Nesocyrtosoma skelleyi with first visible abdominal ventrite with a nipple at the apex.

Fig. 260. Map of the provinces of the Dominican Republic.