Orogastrura Deharveng & Gers, 1979

Deharveng, Louis, Bedos, Anne & Duran, Vanesa, 2015, Two new species of Poduromorpha (Collembola) from the Mercantour National Park (Alpes-Maritimes, France), with comments on pseudopore patterns, Zoosystema 37 (1), pp. 179-191 : 181

Genus Orogastrura Deharveng & Gers, 1979

REMARK

The new species described here differs from all other species of Orogastrura by a lower number of eyes. This, together with the presence of a higher number of eyes in O. stebaevae Babenko, 1994 than that previously considered diagnostic for Orogastrura requires a revised diagnosis of the genus.

UPDATED DIAGNOSIS OF THE GENUS OROGASTRURA . — Hypogastruridae of small size, characterized by a simultaneous regression of eyes, empodial appendage and furcal appendage. Macrochaetae not or only weakly differentiated. No plurichaetosis. Body pigmented. Eyes present, but reduced in number (4-7 per side). Postantennal organ present, with four lobes. Antennae short. No eversible sac between third and fourth antennal segments. Apical vesicle of Ant. IV spherical, large. Internal S-chaetae of Ant. IV not hidden by an integument fold. Mandible and maxilla unmodified. Labrum and labium without modified chaetae. Chaeta a0 present on head. S-microchaetae present on Th. II, absent on Th. III. Chaetae m1 present on Th. II-III. No clavate tenent hairs on tibiotarsi. Unguiculus equal to, or shorter than, one third of inner side of claw and devoid of basal lamella. Ventral tube with 4 + 4 or 5 + 5 chaetae. Tenaculum with three teeth on each ramus. Mucro reduced or absent, dens reduced, with three or four chaetae. Two short anal spines.

TYPE SPECIES. — Orogastrura dilatata (Cassagnau, 1959) .