Nesocyrtosoma skelleyi 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 : 63-65

Nesocyrtosoma skelleyi Hopp and Ivie , New Species

( Figs. 29 , 66 , 76 , 213–216 , 265 , 297 )

Type Material. HOLOTYPE: Male. DOMINICAN REP.: Prov ; Barahona, nr. Filipinas,; Larimar Mine; 20–26-; VI-1992; Woodruff and; Skelley; at night. ( FSCA) . PARATYPES (42 specimens): 3 specimens with same label data as holotype. (3 FSCA). DOMINICAN REP.: Prov.; Barahona, nr. Filipinas,; Larimar Mine; 20–26-VI-; 1992; R. E. Woodruff and; P. E. Skelley, at night. (1 FSCA, 2 WIBF). DOMINICAN REP.: Prov.; Barahona, nr. Filipinas,; Larimar Mine; 20–26-VI-; 1992; R. E. Woodruff and; P. E. Skelley; at light. (3 FSCA, 2 WIBF). DOMINICAN REP.: Prov.; Barahona, nr. Filipinas,; Larimar Mine: 26- VI-7-; VII-1992: Woodruff and; Skelley, at light. (14 FSCA, 7 WIBF). DOMINICAN REP.: Prov.; Barahona, nr. Filipinas,; Larimar Mine: 26-VI-7 -;

VII-1992: Woodruff and; Skelley, day beating. (1 WIBF). DOMINICAN REP.: Prov.; Barahona, nr. Filipinas,; Mt. Tutu ; 26- VI –7-VII-; 1992; P.E.Skelley; day catch, beating. (1 FSCA, 1 MCZC, 2 WIBF). DOMINICAN REPUBLIC:; Pedernales. 23.5 km; N Cabo Rojo.; 18-06N, 71- 38W. 540m / 13–19 July 1990; L. Masner, J. Rawlins; C. Young, Deciduous; forest; intercept trap / Carnegie Museum; Specimen Number; CMNH-376,814. (1 CMNH). DOMINICAN REPUBLIC:; Pedernales. 26 km; N Cabo Rojo. ; 18-06N, 71- 38W. 730m / 19–28 July 1990; L. Masner, J. Rawlins; C. Young, Wet deciduous; forest; intercept trap / Carnegie Museum; Specimen Number; CMNH-349,284. (1 CMNH). DOMINICAN REPUBLIC; Pedernales Prov.,; 25.5km N. Cabo Rojo ; 12–21- V-1992; coll. M.C. Thomas. (1 FSCA) .

Other Material Examined. DOMINICAN REP.: Prov.; Barahona , nr. Filipinas,; Larimar Mine; 26-VI-7-; VII-1992; Woodruff and; Skelley, at light. (1 FSCA — missing head and pronotum) . DOMINICAN REP.: Prov.; Barahona , nr. Filipinas; Larimar Mine; 20–26-; VI-1992; Woodruff and; Skelley; at night. (1 WIBF — disarticulated) .

Diagnosis. This species can be distinguished by the elytral striae deeply impressed ( Fig. 213 ), hypomeral bead absent to extremely faint, antennomeres 7– 10 enlarged, and the absence of an ocular depression. It most closely resembles N. serratum , but can be distinguished from that species by the absent to faint hypomeral bead ( Fig. 27 ) and the thin mesoventrite ( Fig. 216 ).

Description (male). 4.0– 5.5 mm long, 2.0–3.0 mm wide. Small, body elongate, moderately convex ( Figs. 213, 214 ). Shining metallic green to purple; antennae, mouthparts, and tarsi ferrugineous. Head densely variably punctate; largest punctures larger than a single eye facet, weakly to moderately 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 anteriorly raised to a point ( Figs. 10, 12 ). Ventral portion of eye not reaching subgenal sulcus ( Fig. 8 ); postgena with distinct punctures ( Fig. 12 ). Dorsal surface of pronotum densely punctate; punctures separated by 0.5–1.5 diameters. Pronotal marginal bead complete laterally, anterior margin with marginal bead effaced medially, posterior margin without marginal bead; anterior angles of pronotum right, weakly produced and widely rounded apically; lateral edge of pronotum evenly curved to base; pronotum evenly convex ( Fig. 215 ). Hypomeral bead absent to very faint; hypomeron without distinct punctures. Prosternal process apically rounded, with marginal grooves opposite coxae joined apically ( Fig. 216 ). Elytral striae deeply impressed, present as rows of small punctures separated by 0.5–1.0 3 diameter, with a deeply impressed line through the middle of each puncture row; elytral interstriae roundly convex, sparsely punctate; scutellary striae 4 punctures long; scutellum triangular, normal ( Figs. 213, 215 ). Mesoventrite thin antero-posteriorly, V-shaped, excavate receiving prosternal process; metaventrite subequal to antero-postero length of mesocoxa ( Fig. 216 ). Metathoracic wing fully developed. Legs short, punctate; femora reaching beyond edge of elytron; tibia sometimes with weak dorsal longitudinal groove ( Fig. 37 ); metatibia weakly curved apically, with an obvious tooth at apex; metatibia with small serrations extending from tooth to apical 1/3 its length ( Fig. 66 ). 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 to moderately impressed ( Fig. 216 ).

Female. Identical to male, except metatibia straight, lacking ventral apical tooth and serrations.

Biology. This species has been collected at night by light, by day beating, and in flight intercept traps. This suggests that this species flies as it comes to light and has flight wings.

Distribution. This species is endemic to Hispaniola. An extremely long series of this species was taken at the Larimar Mine in Barahona Province in the Dominican Republic. It has also been taken on Mt. Tutu in Barahona Province. Finally, it has been taken on the mine road at 23 and 26 km north of Cabo Rojo in Pedernales Province ( Figs. 260 , 265 ).

Etymology. This species is named for Paul E. Skelley, who collected the majority of the specimens.

Figures

Figs. 29–34. Characters of the elytra and metathoracic wing. 29) Nesocyrtosoma skelleyi with elytral interstriae roundly convex; 30) Nesocyrtosoma cubanense with elytral interstriae flat; 31) Nesocyrtosoma otus with anterodorsal corners of elytron with a notch to receive prothorax; 32) Nesocyrtosoma hispaniolae with epipleuron terminating at base of 5th abdominal ventrite; 33) Strongylium sp. with epipleuron continuing to apex of 5th abdominal ventrite. 34) Nesocyrtosoma otus metathoracic wing.

Figs. 62–73. Male metatibia of the Serrania species-group species. 62) N. bankense; 63) N. garridoi; 64) N. puertoricense; 65. N. serratum; 66) N. skelleyi; 67) N. nearnsi; 68) N. teresitae; 69) N. curvum; 70) N. guerreroi; 71) N. virens; 72) N. cubanense; 73) N. dentatum.

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.

Figs. 209–216. 209–212: Nesocyrtosoma serratum. 209) Habitus, dorsal; 210) Habitus, lateral; 211) Pronotum; 212) Thoracic sterna. 213–216: Nesocyrtosoma skelleyi. 213) Habitus, dorsal; 214) Habitus, lateral; 215) Pronotum; 216) Thoracic sterna.

Figs. 265–267. Nesocyrtosoma species distribution maps. 265) Distributions of N. gebieni, N. hispaniolae, N. neibaense, N. inflatum, N. skelleyi, and N. nearnsi; 266) Distributions of N. mutabile, N. garridoi, N. guerreroi, and N. cubanense; 267) Distributions of N. larseni and N. cuprosum.

Figs. 293–304. Illustrations of male genitalia in dorsal and lateral view of the Serrania species-group species. 293) Nesocyrtosoma bankense; 294) N. garridoi; 295) N. puertoricense; 296) N. serratum; 297) N. skelleyi; 298) N. nearnsi; 299) N. teresitae; 300) N. curvum; 301) N. guerreroi; 302) N. virens; 303) N. cubanense; 304) N. dentatum.

Figs. 23–28. Characters of the pronotum, hypomeron and prosternal process. 23) Nesocyrtosoma bestiola pronotum with anterior marginal bead effaced, lateral marginal bead complete, and posterior margin absent; 24) Nesocyrtosoma inflatum pronotum with anterior and posterior marginal beads effaced medially and lateral marginal bead complete; 25) Nesocyrtosoma lacrima pronotum with anterior marginal bead absent, lateral marginal bead complete, and posterior marginal bead absent; 26) Strongylium atrum pronotum with anterior and posterior marginal bead complete and lateral marginal bead absent; 27) Nesocyrtosoma cubanense hypomeron with marginal bead and distinct punctures; 28) Cnodalon viride prosternal process apically narrowly rounded, nearly to a point.

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. 35–38. Characters of the legs. 35) Nesocyrtosoma inflatum with trochanters reduced and setose; 36) Nesocyrtosoma otus with metafemur emarginate at apex; 37) Nesocyrtosoma virens with protibia with dorsal longitudinal groove; 38) Nesocyrtosoma serratum with ventral metatibial serrations.

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