Nesocyrtosoma serratum 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 : 62-63

Nesocyrtosoma serratum Hopp and Ivie , New Species

( Figs. 38 , 65 , 209–212 , 264 , 296 )

Type Material. HOLOTYPE: Male. DOMINICAN REPUBLIC; Pedernales prov., 172 m,;, 10 km on trail to Carlitos,; Parque Nacional Jaragua ,; 17u 47.8929N 71u 28,9659W; 708. iv.2004, D. Perez, B.; Hierro, R. Bastardo. [RD- 216]. ( NMNH) . PARATYPES (5 specimens): 1 WIBF specimen with same data as holotype. ( WIBF). DOM. REP.: Prov. LaAltagracia; Boca de Yuma entr., Par. Nac; del Este, 06AUG1999, 12 m; 18u 21.9049N, 68u 37.0949W; M. A. Ivie, beating vegetation. (1 WIBF). DOMINICAN REPUBLIC:; Pedernales Prov., PN Jaragua; 3 km S. of Los Tres Charcos; 99 m; 17u 48.0639N, 71u 26.8099W; 16- VI-2005, Gino Nearns. (1 FSCA). DOMINICAN REPUBLIC; La Altagracia Prov., PN del; Este, Boca de Yuma ; 18u 21.5089N, 68u 36.9569W; 20m-day coll. 19 July 2004; Steven W. Lingafelter. (1 WIBF). DOMINICAN REPUBLIC; La Altagracia Prov., PN del; Este , Guargauao- day coll.; 18u 19.5689N, 68u 48.5009W; 0–5 meters 21 July 2004; Norman Woodley. (1 NMNH) .

Other Material Examined. DOM. REP.: Prov. Pedernales; Par. Nac. Jaragua; 8 km NW Oviedo ; 20AUG1997, P. W. Kovarik. (1 WIBF — head missing) .

Diagnosis. This species can be distinguished by the combination of the elytral striae deeply impressed ( Fig. 209 ), strong hypomeral bead ( Fig. 27 ), antennomeres 7–10 enlarged, and the absence of an ocular depression. It most closely resembles Nesocyrtosoma skelleyi , but can be distinguished from that species by the presence of a strong hypomeral bead ( Fig. 27 ) and broad mesoventrite ( Fig. 212 ).

Description (male). 4.5–5.0 mm long, 2.3–2.8 mm wide. Small, body elongate, moderately convex ( Figs. 209, 210 ). Dark blue to purple; antennae, mouthparts, and tarsi ferrugineous. Head densely variably punctate; largest punctures

subequal to 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 obtuse, weakly produced and widely rounded apically; lateral edge of pronotum evenly curved to base; pronotum evenly convex ( Fig. 211 ). Strong hypomeral bead ( Fig. 27 ); hypomeron with distinct punctures ( Fig. 27 ). Prosternal process apically rounded, distinct marginal grooves opposite coxae joined apically ( Fig. 212 ). 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, scarcely punctate; scutellary striae 4–6 punctures long; scutellum triangular, normal ( Figs. 209, 211 ). Mesoventrite broad antero-posteriorly, U-shaped, excavate receiving prosternal process; metaventrite subequal to antero-postero length of mesocoxa ( Fig. 212 ). Metathoracic wing fully developed. Legs short, punctate; femora reaching beyond edge of elytron; tibiae sometimes with weak dorsal longitudinal groove ( Fig. 37 ), tibiae straight except metatibia weakly curved with vestigial tooth at apex; metatibia with small serrations extending from tooth to apical 1/3 its length ( Figs. 38 , 65 ). Abdominal depressions on 4th and 5th ventrites reduced to indistinct slits ( Fig. 74 ); intercoxal process of the first ventrite rounded with apical nipple; ventral surface densely punctate, punctures moderately to strongly impressed ( Fig. 212 ).

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

Biology. This species has been taken by beating vegetation in dry forest and hand collecting during the day.

Distribution. This species is endemic to Hispaniola. It has been collected in Parque Nacional Jaragua in Pedernales Province and Parque Nacional del Este Boca de Yuma and Parque Nacional del Este Guargauao in La Altagracia Province of the Dominican Republic ( Figs. 260 , 264 ).

Etymology. Males of this species have a series of tiny serrations on the ventral apical 1/3 of the metatibia ( Fig. 38 ), and is thus called serratum , from the Latin word serratus.

Figures

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.

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. 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. 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. 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. 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.