Nesocyrtosoma phthanatum Doyen and Poinar, 1994

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 : 80-81

{ Nesocyrtosoma phthanatum Doyen and Poinar

( Fig. 257 )

{ Nesocyrtosoma phthanatum Doyen and Poinar 1994: 46 , 48, Fig. 28 ; Arillo and Ortuño 2005: 23; Perez-Gelabert 2008: 115.

{Nesocyrtoma phthanatum Perez-Gelabert 1999: 31 [lapsus calami].

Type Material Examined. HOLOTYPE: Nesocyrtosoma ; phthanata; Doyen and Poinar; HOLOTYPE. ( GOPC) .

Diagnosis. This species can be distinguished from all other fossil species by the uniform width of the pronotum and elytra until the apical 1/4 of the elytra tapered weakly to become more slender, the anterior angles of the pronotum very broadly rounded, weakly produced, and the lateral edges of the pronotum entirely straight to the apex.

Redescription (modified from Doyen and Poinar 1994) (sex unknown). 6.7 mm long, 3.1 mm wide. Small, elongate oval, moderately convex ( Fig. 257 ). Elytra shining green. Head densely punctate dorsally; largest punctures larger than a single eye facet, deeply impressed. Dorsal surface of pronotum densely 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 nearly obtuse, weakly produced and widely rounded apically; lateral edge of pronotum straight to base; pronotum evenly convex ( Fig. 257 ). Elytral striae deeply impressed, present as rows of small punctures with a deeply impressed line through the middle of the punctures; elytral interstriae roundly convex; scutellum triangular, normal ( Fig. 257 ). All femora reaching past edge of elytra. Venter completely obscured by thick layer of amber.

Figures

Figs. 251–257. 251–253: {Nesocyrtosoma celadonum. 251) Habitus, dorsal; 252) Habitus, lateral; 253) Habitus, ventral. 254–256: {Nesocyrtosoma minisculum. 254) Habitus, dorsal; 255) Habitus, lateral; 256) Habitus, ventral. 257) {Nesocyrtosoma phthanatum, habitus, dorsal.

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.