Nesocyrtosoma lacrima 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 : 36-37

Nesocyrtosoma lacrima Hopp and Ivie , New Species

( Figs. 8 , 25 , 48 , 128–131 , 269 , 279 )

Nesocyrtosoma n. sp. Ivie et al. 2008.

Type Material. HOLOTYPE: Male. Montserrat; 23.3 WI/ HGHubbard; Collector. ( NMNH) . PARATYPES (32 specimens): 9 specimens with the same label data as holotype. (6 NMNH, 3 WIBF). Montserrat; W.I./ Montserrat; 23.3 WI/ HGHubbard; Collector. (8 NMNH — 2 pins with 2 cards on each pin and 2 specimens mounted on each card). Montserrat; 23.3 WI/ HGHubbard; Collector / Clearings ; 2,000 ft. (1 NMNH). Montserrat; 23.3 WI/ HGHubbard; Collector / 117. (1 NMNH). MONTSERRAT: Katy Hill ; trail above heli pad; 14 AUG 2005, 2,300ft; I.A. Foley colr. (7 WIBF). MONTSERRAT: Roache’s ; S. of Soufriere Hills ; Upper Pond, 1990’; 16u 41.629N, 62u 10.069W; 25JUNE2002, M.A.Ivie / Beating dead vines. (1 CMNH, 1 WIBF,). MONTSERRAT:; Roache’s Estate, 1,943 ft; 16u 41.609N, 62u 09.999W; 05 JULY 2002; K. A. Marske colr. (2 WIBF). MONTSERRAT:trail to; Big River, 1,230ft; 16u 45.7199N, 62u 11.349w; 15 AUG 2005; WIBF group colrs. (1 FSCA, 1 WIBF) .

Diagnosis. This species can be distinguished from all other species by the elongate body form ( Figs. 128, 129 ), ferrugineous to bronze color, elongate pronotum, absence of anterior and posterior pronotal margins ( Fig. 25 ), and complete impressed elytral striae ( Fig. 128 ).

Description (male). 4.5–6.5 mm long, 2.5–3.5 mm wide. Small, body elongate, moderately convex; broadest in anterior half of elytra; elytra strongly tapered at apex, giving it a teardrop-shaped body form ( Figs. 128, 129 ). Ferrugineous to bronze; antennae, mouthparts and tarsi ferrugineous. Head moderately punctuate dorsally; punctures smaller than a single eye facet; shagreened. Antenna weakly clavate, nearly filiform; antennomeres 7–10 weakly widened apically, forming a loose, elongate club; apical antennomere subcircular; antennomeres 7–10 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 without distinct punctures. Dorsal surface of pronotum weakly punctate; appearing smooth, shagreened. Pronotal marginal bead complete laterally; anterior and posterior margin lacking marginal bead; anterior angles of pronotum nearly right, moderately produced and widely rounded apically; lateral edge of pronotum evenly curved to base (rarely weakly sinuate at base); pronotum evenly convex ( Fig. 130 ). Hypomeron without distinct punctures. Prosternal process apically rounded, with distinct marginal grooves opposite coxae joined apically ( Fig. 131 ). 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, connecting the row of punctures; elytral interstriae roundly convex, sparsely punctate, shagreened; scutellary striae short, 1–3 punctures long; scutellum triangular, reduced ( Figs. 128, 130 ). Mesoventrite thin antero-posteriorly, U-shaped, shallowly excavate, receiving prosternal process; metaventrite,1/2 antero-postero length of mesocoxa ( Fig. 131 ). Metathoracic wing vestigial. Legs long, slender, lightly punctate; femora reaching beyond edge of elytron; tibiae straight; metatibia with ventral tooth vestigial ( Fig. 48 ). Abdominal depressions on 4th and 5th ventrites reduced to indistinct slits ( Fig. 74 ); intercoxal process of first ventrite apically rounded; ventral surface weakly punctate; shagreened ( Fig. 131 ).

Female. Identical to male, except metatibia lacking ventral tooth proximad apex.

Biology. This species has been collected by beating vines in moist to wet forest at high elevations.

Distribution. This species is endemic to Montserrat and has been collected on Katy Hill, Roache’s Estate south of Soufriere Hills at the Upper Pond, and the Trail to Big River ( Fig. 269 ). A long series was also collected by H. G. Hubbard in ‘‘clearings’’ at 2,000 ft, probably in 1894 ( Ivie et al. 2008).

Etymology. The species epithet, used as a noun in apposition, is from the Latin word lacrima , which is derived from the Greek word, dáKRUMa, meaning a tear. This species is shaped like a teardrop and is thus named lacrima .

Figures

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. 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. 128–135. 128–131: Nesocyrtosoma lacrima. 128) Habitus, dorsal; 129) Habitus, lateral; 130) Pronotum; 131) Thoracic sterna. 132–135: Nesocyrtosoma simplex. 132) Habitus, dorsal; 133) Habitus, lateral; 134) Pronotum; 135) Thoracic sterna.

Figs. 268–269. Nesocyrtosoma species distribution maps. 268) Distributions of N. bankense, N. curvum, and N. puertoricense; 269) Distribution of N. lacrima on Montserrat.

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. 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.