Mecyclothorax subquadratus Perrault, 1984: 30

Liebherr, James K., 2013, The Mecyclothorax beetles (Coleoptera, Carabidae, Moriomorphini) of Tahiti, Society Islands, ZooKeys 322, pp. 1-170 : 19-20

2. Mecyclothorax subquadratus Perrault, 1984: 30

Identification.

This is the smallest-bodied species in the Mecyclothorax muriauxi group to possess both lateral and basal pronotal setae; standardized body length 5.1 mm and setal formula 2201. The subquadrate pronotum has sinuate lateral margins and a broad base (Fig. 10B); MPW/PL = 1.20, APW/BPW = 0.78. The vertex of the head has shallow transverse-mesh microsculpture, the sculpticells difficult to discern in reflected light. The neck is covered with a more developed isodiametric mesh. The pronotal disc exhibits an evident transverse mesh, sculpticells 2 –3× broad as long, and the discal elytral intervals are covered with a more distinct transverse mesh of the same dimensions.

Distribution and habitat.

The single holotype female specimen was collected at 1000 m elevation on Mont Marau.