Pseudonannolene gogo Iniesta & Ferreira

Iniesta, Luiz Felipe Moretti & Ferreira, Rodrigo Lopes, 2013, Two new species of Pseudonannolene Silvestri, 1895 from Brazilian iron ore caves (Spirostreptida: Pseudonannolenidae), Zootaxa 3716 (1), pp. 75-80 : 75-77

Pseudonannolene gogo Iniesta & Ferreira , new species.

( Figs. 1 A, B, C)

Material examined: Holotype: Male ♂ ( ISLA 4000) from Mariana/MG, Brazil; SPA62 cave; 13/V/2011; Pellegrini, T. G. collec.

Paratype: 1 Male ♂ ( ISLA 4001) from Mariana/MG, Brazil; SPA66 cave; 13/V/2011; Pellegrini, T. G. collec. 1 Female ♀ ( ISLA 4002) from Mariana/MG, Brazil; SPA74 cave; 13/V/2011; Pellegrini, T. G. collec. 1 Female ♀ ( ISLA 4003) from Mariana/MG, Brazil; SPA17 cave; 13/V/2011; Pellegrini, T. G. collec.

Other material studied: 3 Female ♀ and 1 Male ♂ from Mariana/MG, Brazil; SPA30 cave, SPA 17 cave and SPA 66 cave; 13/V/2011; Pellegrini, T. G. collec.

Etymology. The epithet is a noun in apposition, a toponymic for the name of the region ( Gogo ) where the species was collected.

Measurements: Length from 42 up to 52 mm; maximum midbody diameter between 3.02 to 4.16 mm; body rings ranging between 55 to 61; length of antennae ranging from 3.0 to 3.70 mm (relation to diameter ranging 0.89 to 0.99); length of legs 1.20 to 1.25 mm (relation to diameter ranging 0.40 to 0.30); length of tarsal claw 0.10 to 0.16 mm (relation to diameter ranging 0.03 to 0.038).

Descriptions. Head: Slightly pigmented in region of epicranium. Ocelli pigmented; ranging from 33 to 38. Three small labral teeth, a row of 26 labral setae and a row of 6 supralabral setae. Mandibles pigmented; 2 external teeth, 4 internal teeth and 8 rows on pectinate lamellae. Antennae pigmented; densely setose; First antennomere shorter than others; Second and third antennomeres of similar sizes. Fourth antennomere longer than the fifth; Sixth antennomere longer and wider than the fourth and fifth; Fifth and fourth antennomere with groups of basiconic sensilla on the lateral edge; Four terminal sensorial cones. Gnatochilarium typical of the genus; not modified.

Collum: Glabrous; Pigmented in central region; Edge weakly pigmented; striae on region lateral (variable among individuals); limbus not modified.

Trunk: Prozonite of darkened pigmentation and metazonite slightly brownish and whitish; Prozonite separated from metazonite due to weak suture; presence of lateral striae (variable among individuals). Openings of the repugnatorial glands (ozopore) starting from the fifth ring. Limbus smooth. Pre-anal ring pigmented; anal valve with setae on the opening.

First pair of legs ( Fig. 1 C): Not pigmented. Coxae with width and length larger than other podomeres; densely setose. Sternum sub-triangular; reduced; glabrous. Pre-femur has the width and the length of similar sizes; shorter than tibia and tarsus. Post-femur similar to pre-femur. Tarsal claw not modified. Oral process rounded; elongated; parallel to coxae; edge distal with wavy surface; bristles visible near pre-femur.

Gonopod ( Fig. 1 B): Short and stout; Coxae reduced; Sternum not visualized. Basal section short; rounded; length 0.75 times longer than wide; No bristles visible. Basiconic bristles distributed in rows on membranous internal edge from basis of basal section toward distal section. Pointed shoulder in basal section. Distal section with length about 0.5 times longer than width; Solenomere with stout trunk; rounded distal region with squamous surface and composed of two tips; internal branch shorter and stouter; covering the basis of solenomere; Setae (presumably sensory) surrounding meso-distal portion of the edge.

Figures

FIGURE 1. P. gogo n. sp., paratype male (ISLA 4001). A) Detail of anterior region. Note the arrow pointed to socket where the gonopod is allocated; B) Gonopod; C) Oral process in first pair of legs and schematic drawing (the bristles were removed). Scales bars: A) 1 mm; B) 200 µm; C) 200 µm.