Mecyclothorax quadraticollis Perrault, 1984: 29

Liebherr, James K., 2013, The Mecyclothorax beetles (Coleoptera, Carabidae, Moriomorphini) of Tahiti, Society Islands, ZooKeys 322, pp. 1-170 : 26

11. Mecyclothorax quadraticollis Perrault, 1984: 29

Identification.

Unique among the Mecyclothorax muriauxi group in the parallel-sided elytra (Fig. 12C), this species can also be diagnosed by the broad head and little convex eyes; ocular ratio 1.40. The pronotum is quadrate with the lateral margins gently concave and upraised anterad the projected, acute hind angles. The discal elytral striae are deep with elongate punctures, the intervals convex. The frons and vertex are distinctly microsculptured, the sculpticells a mixture of isodiametric and transverse. The pronotum bears transverse mesh microsculpture that produces a subiridescent sheen, and the discal elytral intervals are lined with transverse sculpticells, their breadth 2 –3× their length. Setal formula 2101; standardized body length 6.1 mm.

Distribution and habitat.

The holotype female was beaten from dead leaves at 1400 m elevation on Mont Marau.