Difference between revisions of "Mecyclothorax striatopunctatus"

Revision as of 09:22, 9 August 2013

Taxonavigation

Ordo: Coleoptera
Familia: Carabidae
Genus: Mecyclothorax

Name

Mecyclothorax striatopunctatus Perrault, 1986: 442 – Wikispecies link – Pensoft Profile

Identification

Among members of this group, this species is diagnosable by the very glossy upper body surface, with the vertex, pronotal disc, and discal elytral intervals extremely smooth such that tiny micropunctures – pore canals – are visible across the smooth surface. The pronotal hind angles are obtuse and only slightly protruded, the projection consisting of an expansion of the marginal bead surrounding the articulatory socket of the basal pronotal seta (Fig. 28A). The pronotal median base is distinctly punctate with about 20 rounded punctures each side that are isolated by glossy cuticle. All elytral striae are deep with rounded punctures that expand their breadth in the basal half. The eighth elytral interval is subcarinate immediately laterad the seventh stria and convex laterally. There are two to three setae near the elytral apex; a short one in interval 7 along the elytral margin, and a second longer one laterad the apically fused terminus of striae 3 + 4. In the male paratype examined (MNHN), there is a third short seta immediately basal to the second; setal formula 222(2-3). The male aedeagal median lobe is narrowed apically, with a small rounded expansion of the tip (Fig. 3A). The right paramere is parallel sided, and slightly expanded to its tightly rounded apex. Standardized body length 5.9 mm.

Distribution and habitat

This species is known from the type series of five specimens collected at 1000 m elevation on Mont Marau.

Taxon Treatment

• Liebherr, J; 2013: The Mecyclothorax beetles (Coleoptera, Carabidae, Moriomorphini) of Tahiti, Society Islands ZooKeys, 322: 1-170. doi

Images

Figure 3. Male aedeagal median lobe and associated parameres, Mecyclothorax spp., right lateral view; scale bars 0.5 mm A Mecyclothorax striatopunctatus paratype (MNHN) (apex of dissection damaged and lost; apex depicted by detail drawing [Perrault 1986[1], fig. 23]) B Mecyclothorax bougainvillei holotype C Mecyclothorax mahina holotype D Mecyclothorax poria holotype E Mecyclothorax villiersi F Mecyclothorax taatitore paratype (CUIC) G Mecyclothorax pirihao paratype (CUIC) H Mecyclothorax bryobioides Abbreviations: at apical tooth dop dorsal ostial microtrichial patch fp flagellar plate lp left paramere oc ostial canal pa parameral articulation rp right paramere vop ventral ostial microtrichial patch.  Figure 28. Mecyclothorax spp., dorsal view; scale bars 1.0 mm; setal formula (see Fig. 10) at lower right of each figure A Mecyclothorax striatopunctatus holotype male B Mecyclothorax wallisi C Mecyclothorax curtisi holotype male D Mecyclothorax bougainvillei holotype male.

1. ↑ Perrault G (1986) La faune des Carabidae de Tahiti VII. révision du genre Mecyclothorax (Sharp) (Psydrini). 2. les groupes de M. striatopunctatus n. sp., M. dannieae Perrault, M. marginatus Perrault et M. viridis Perrault (Coleoptera). Nouvelle Revue d’Entomologie (NS) 3: 439-455.