Nesocyrtosoma gebieni (Marcuzzi) Hopp, Katie J. & Ivie, Michael A., 2009

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 : 23-24

Nesocyrtosoma gebieni (Marcuzzi) , New Combination

( Figs. 95–98 , 265 )

Cyrtosoma (Nesocyrtosoma) gebieni Marcuzzi 1976: 37 , 139, Fig. 19 ; 1984: 102; 1991: 247; Garrido and Gutiérrez 1996: 281–282; Marcuzzi 1999: 81; Peck 2005: 156.

Cyrtosoma (Nesocyrtosoma) gebiene ; Garrido and Gutiérrez 1996: 282 [lapsus calami].

Cnodalon punctatum Zayas 1988: 103–104 , Fig. 92 [synonymy by Garrido and Gutiérrez 1996].

Cyrtosoma punctatum ; Marcuzzi 1998: 160; Peck 2005: 156.

Taxonomic Notes. The synonymy of Cnodalon punctatum Zayas with Cyrtosoma (Nesocyrtosoma) gebieni Marcuzzi made by Garrido and Gutiérrez (1996) is correct. However, this species has never been formally combined with Nesocyrtosoma at the full generic rank, and is here placed as Nesocyrtosoma gebieni (Marcuzzi) for the first time.

Type Material Examined. HOLOTYPE of Cyrtosoma (Nesocyrtosoma) gebieni Marcuzzi : Pico de Turquino; Agoslo 15/28./ Cuba / A. Pierig comm.; Eing.Nr.120; 1931/ Holotypus 1976; Cyrtosoma ; gebieni ; Marcuzzi/ Cyrtosoma ; gebieni Marcuzzi ; Dr.Zkaszab det., 1984. ( HNHM). HOLOTYPE of Cnodalon punctatum Zayas : Rancho Mundito, S.; de los Organos, Cuba; Jul. 4/47, F. de Zayas; y J. Ferras, cols./ red circle label Tipo/ C. punctatum ; sp. n. ( FZMC).

Other Material Examined. Coleccion M. Barro; Sierra del Rangel ; 19. V. 1934; P. del. Rio. CUBA. (2 OHGC — bearing the numbers OHG 1827 and OHG 1828) .

Diagnosis. This species is distinguished from all others by the combination of elytral punctures deeply impressed with a lightly impressed stria through the middle of each puncture row, interstriae roundly convex ( Fig. 95 ), head anteriorly truncate, and the medial portion of the first visible abdominal ventrite slightly raised ( Fig. 98 ).

Redescription (modified from Marcuzzi 1976) (female). 7.5–8.0 mm long, 5.0 mm wide. Body extremely convex ( Figs. 95, 96 ). Dark maroon to black; antennae, mouthparts and tarsi tending to be the same color as legs. Head anteriorly truncate ( Fig. 97 ); densely punctate dorsally, largest punctures subequal to a single eye facet and moderately impressed, punctures behind frontoclypeal suture subequal in diameter to a single eye facet; 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 acute median keel raised anteriorly to a point ( Figs. 10, 12 ). Ventral portion of eye not reaching subgenal sulcus ( Fig. 8 ); postgena without distinct punctures. 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, moderately produced and apically narrowly rounded; lateral edge of pronotum sinuate at base; pronotum evenly convex ( Fig. 97 ). Hypomeron lacking distinct punctures, a few small punctures may be present. Prosternal process apically rounded; distinct marginal grooves opposite coxae not joined apically; area between marginal grooves concave between coxae becoming convex at apex ( Fig. 98 ). Elytral striae present as deeply impressed punctures connected by a weakly impressed stria through the middle of each puncture row; elytral interstriae weakly convex, scarcely punctate; scutellary striae 1–3 punctures long; scutellum triangular, reduced ( Figs. 95, 97 ). Mesoventrite thin antero-posteriorly, deeply excavate, V-shaped receiving prosternal process; metaventrite,1/2 antero-postero length of mesocoxa ( Fig. 98 ). Metathoracic wing vestigial. Legs long, slender, densely punctate; apical 1/3 of femora reaching beyond edge of elytron; tibiae weakly curved at apex. Abdominal depressions on 4th and 5th ventrites reduced to slightly impressed slits ( Fig. 74 ); intercoxal process of first ventrite broadly rounded apically; medial portion of first visible ventrite weakly raised; ventral surface densely punctate, punctures weakly impressed ( Fig. 98 ).

Male. No males available for study.

Biology. Unknown.

Distribution. This species is endemic to Cuba. Of the three specimens studied, two were collected from Sierra Rangel in Pinar del Rio and the other from Pico Turquino in Guantánamo ( Figs. 258 , 265 ). This distribution is unusual in having populations of this flightless species in two mountain ranges at opposite ends of the island. Discovery of intervening populations inhabiting other mountain ranges between the Sierra Rangel and the Sierra Maestra is to be expected.

Figures

Figs. 95–103. 95–98: Nesocyrtosoma gebieni. 95) Habitus, dorsal; 96) Habitus, lateral. 97) Pronotum; 98) Thoracic sterna. 99–103: Nesocyrtosoma tumefactum. 99) Habitus, dorsal; 100) Habitus, lateral; 101) Pronotum; 102) Thoracic sterna; 103) Lateral view of prosternal process showing apical, medial bump.

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. 19–22. 19–20: Left maxilla; mp 5 maxillary palp. 19) Nesocyrtosoma hispaniolae with apical maxillary palpi securiform; 20) Tenebrio molitor (redrawn from Doyen 1966) with apical maxillary palpi rectangular. 21–22: Labium; lp 5 labial palp. 21) Nesocyrtosoma hispaniolae with apical labial palpi rectangular; 22) Strongylium atrum with apical labial palpi triangular.

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. 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.

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