Nesocyrtosoma

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 : 20-22

Nesocyrtosoma s. s. Species-group

Seven species are redescribed and five new species are described for the first time. Species are listed in phylogenetic order.

Nesocyrtosoma bestiola Hopp and Ivie , New Species ( Figs. 23 , 39 , 85–89 , 262 , 270 )

Type Material. HOLOTYPE: Male. DOMIN. REP.: Prov. Barahona; 7km NE Enriquillo ; 08 SEP 1988, beating veg.; M. A. Ivie, T. K. Philips; and K. A. Johnson colrs. (from WIBF, deposited in NMNH) . PARATYPES (3 specimens): 2 specimens from WIBF with the same label data as holotype (1 WIBF, 1 NMNH) and 1 labeled DOMIN. REP.: Prov. Barahona; 32 km S Barahona, nr

coast; 29 AUG 1988, on dead logs; M. A. Ivie, T. K. Philips; and K. A. Johnson colrs. (1 WIBF).

Diagnosis. This species can be distinguished by the small, convex body form, black lustrous color, and extremely lightly impressed elytral punctation. This species is similar to Nesocyrtosoma hispaniolae , but can be distinguished by the base of the prosternal process forming a shelf ( Fig. 89 ). Males of this species have a longitudinal patch of setae extending 1/4 of the metatibia from the base on the venter ( Fig. 39 ).

Description (male). 4.0–5.0 mm long, 3.0– 3.5 mm wide. Body short, extremely convex ( Figs. 85, 86 ). Black with weak luster under light; antennae, mouthparts, legs and tarsi darkly ferrugineous. Head densely punctate; punctures smaller than a single eye facet and lightly impressed; extremely short golden seta emerging from each puncture; head often appearing smooth. Antenna clavate; antennomeres 7–10 transverse, forming a loose, elongate club; antennomere 11 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 lightly punctate, punctures lightly impressed, pronotum often appearing smooth, shagreened. Pronotal marginal bead complete laterally, anterior marginal bead effaced medially, posterior marginal bead absent; anterior angles of pronotum acute, produced and apically narrowly rounded; lateral edge of pronotum evenly curved to base; pronotum evenly convex ( Figs. 23 , 87 ). Hypomeron lacking distinct punctures. Prosternal process basally forming a shelf ( Fig. 89 ), apically rounded, indistinct marginal grooves opposite coxae, joined apically ( Fig. 88 ). Elytral striae with small, lightly impressed puncture rows, punctures the size of the point of an insect pin, separated by 2 diameters; scutellary striae absent; scutellum triangular, reduced ( Figs. 85, 87 ). Mesoventrite thin antero-posteriorly, excavate, V-shaped, receiving prosternal process; metaventrite,1/2 anteropostero length of mesocoxa ( Fig. 88 ). Metathoracic wing vestigial. Legs short, punctate; apical portion of femora reaching beyond edge of elytron; tibiae straight; metatibia with longitudinal patch of setae extending 1/4 of the metatibia from the base on the venter ( Fig. 39 ). Abdominal depressions on 4th and 5th ventrites reduced to indistinct slits ( Fig. 74 ); intercoxal process of first ventrite broadly rounded apically; ventral surface densely punctate, punctures moderately impressed ( Fig. 88 ).

Female. Identical to male, except metatibia without ventral longitudinal patch of setae.

Biology. The specimens of this species were beaten from dead limbs or taken on dead logs.

Distribution. This species is endemic to Hispaniola and has been taken in the eastern Sierra de Bahoruco near Enriquillo and Barahona in Barahona Province ( Figs. 260 , 262 ).

Etymology. The species epithet, used as a noun in apposition, is from the Latin word bestiola meaning a little creature, referring to its status as smallest member of the Nesocyrtosoma s. s. species-group.

Nesocyrtosoma ferruginea (Garrido and Gutiérrez) , New Combination ( Figs. 40 , 90–94 , 262 , 271 )

Cyrtosoma (Nesocyrtosoma) ferruginea Garrido and Gutiérrez 1996: 283–284 , Fig. 1 ; Peck 2005: 156.

Type Material Examined. HOLOTYPE: III.84; Maisi, Ote.; Col. Genaro. ( MNHC).

Other Material Examined. Coast below; Pico Turquino; June 26–30, ’36/ Cuba 1936; Darlington; Collector. (2 MCZC). CUBA, Reserva; Ecologica; Hatibonico, Guantanamo; vi.2001, cols. JA; Genaro y; LM Diaz. (2 OHGC — bearing the numbers OHG 2833 and OHG 1282). Maisi, Ote; III. 84; Col. Genero/ Tenebrionidae ; Ident. OHG 2846; Cyrtosoma ferruginea ; Garr. and Gut. 1997. (1 OHGC). Loma Gato; Ote. J. Aluna; Sept. 1935 / Loma del Gato; Sept- 1935; J. Aluna/ Tenebrionidae ; Ident. OHG 1472; Cyrtosoma . (1 OHGC).

Diagnosis. This species can be distinguished by the short, convex body form, and small weakly impressed elytral punctures spaced 2 diameters apart. This species is similar to Nesocyrtosoma inflatum , but can be separated by the weakly impressed elytral punctures and elytra apices weakly tapered and barely visible from above ( Fig. 90 ). It is also similar to N. bestiola and N. hispaniolae , but can be separated by having more obvious elytral punctures and more globose body.

Redescription (modified from Garrido and Gutiérrez 1996) (male). 6.0–7.0 mm long, 5.0 mm wide. Body short, extremely convex ( Figs. 90, 91 ). Apex of elytra barely visible from above ( Fig. 90 ). Black in color; antennae, mouthparts and tarsi ferrugineous. Head densely punctate, punctures smaller than a single eye facet, lightly impressed; extremely short golden seta emerging from each puncture. Antenna weakly clavate, nearly filiform; antennomeres 7–10 weakly widened apically, forming a loose, elongate club; apical antennomere longitudinally ovate; antennomeres 7–11 with stellate sensoria. Mentum with broad median keel raised anteriorly to a point ( Fig. 13 ); ventral portion of eye not reaching subgenal sulcus ( Fig. 8 ); postgena without distinct puncture. Dorsal surface of pronotum densely punctate; punctures separated by 1.0–1.5 diameters. Pronotal marginal bead complete laterally; anterior and posterior margins with marginal bead effaced medially; anterior angles of pronotum acute, produced and apically narrowly rounded; lateral edge of pronotum weakly sinuate at base; pronotum evenly convex ( Fig. 92 ). Hypomeron lacking distinct punctures. Prosternal process apically rounded with marginal grooves opposite coxae not joined apically ( Fig. 93 ). Elytral striae not impressed, present as rows of small punctures separated by 1.0– 1.5 3 diameter; elytral interstriae flat, impunctate; scutellary striae short indistinct, 1–3 punctures long; scutellum triangular, reduced ( Figs. 90, 92 ). Mesoventrite thin antero-posteriorly, deeply excavate, V-shaped, receiving prosternal process; metaventrite,1/2 antero-postero length of mesocoxa ( Fig. 93 ). Metathoracic wing vestigial. Legs short, slender, punctate; apical 1/4 of femur reaching beyond edge of elytron; tibiae straight; metatibia with ventral longitudinal patch of setae extending from apex to approximately 1/3 its length ( Figs. 40 , 94 ). Abdominal depressions on 4th and 5th ventrites reduced to slightly impressed slits ( Fig. 74 ); intercoxal process of first ventrite broadly triangular apically; ventral surface densely punctate, punctures weakly impressed ( Fig. 93 ).

Female. Identical to male, except metatibia lacking ventral longitudinal patch of setae.

Biology. No biological data available, except that this species is known from the coast near Pico Turquino.

Distribution. This species is endemic to Cuba and has only been collected on Pico Turquino in Guantánamo province ( Figs. 258 , 262 ).

Figures

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. 39–49. Male metatibia of the Nesocyrtosoma s. s. species-group species. 39) Nesocyrtosoma bestiola; 40) N. ferruginea; 41) N. tumefactum; 42) N. turquinense; 43) N. hispaniolae; 44) N. neibaense; 45) N. inflatum; 46) N. merkli; 47) N. scabrosum; 48) N. lacrima; 49) N. simplex.

Figs. 85–94. 85–89: Nesocyrtosoma bestiola. 85) Habitus, dorsal; 86) Habitus, lateral; 87) Pronotum; 88) Thoracic sterna; 89) Prosternal process forming shelf at base. 90–94: Nesocyrtosoma ferruginea. 90) Habitus, dorsal; 91) Habitus, lateral; 92) Pronotum; 93) Thoracic sterna; 94) Male metatibia.

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. 270–280. Illustrations of male genitalia in dorsal and lateral view of the Nesocyrtosoma s.s. species-group species. 270) Nesocyrtosoma bestiola; 271) N. ferruginea; 272) N. tumefactum; 273) N. turquinense; 274) N. hispaniolae; 275) N. neibaense; 276) N. inflatum; 277) N. merkli; 278) N. scabrosum; 279) N. lacrima; 280) N. simplex.

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.

Figs. 1–4. Dorsal view of head. 1) Nesocyrtosoma otus with punctures on the dorsal surface of head smaller than a single eye facet (sp 5 small puncture); 2) Nesocyrtosoma bankense with dorsal punctures on the surface of the head subequal or larger than a single eye facet (lp 5 large puncture; 3) Cyrtosoma picea with clypeal membrane exposed (CM 5 clypeal membrane); 4) Nesocyrtosoma inflatum with clypeal membrane concealed.

Figs. 258–259. Maps of provinces of Cuba. 258) Provinces of Cuba from 1976 to present; 259) Provinces of Cuba prior to 1976.