Arrhopalites vazquezae Palacios­Vargas & Zeppelini, 1995: 14

Zeppelini, Douglas, 2006, The genus Arrhopalites Börner, 1906 (Collembola, Appendiciphora, Arrhopalitidae) in the Neotropical Region, with description of four new cave species from Brazil, Zootaxa 1124, pp. 1-40 : 17

Arrhopalites vazquezae Palacios­Vargas & Zeppelini, 1995: 14 –16, figs. 25–32.

Material examined: Holotype Ψ and 2 paratypes ΨΨ, 7­xii­1993. MEXICO, Oaxaca, Acatlan. De la Culebra cave. Sprouse coll. Christiansen leg., LESM.

Caecus ­group ( Fig. 7 , A–K). Body setae as shown in figure D. Antennae of holotype 1.6X as long as the cephalic diagonal. Ant. IV with five ringed subsegments (Fig. A), apex with a capitate sense rod (Fig. B). Ant. III without basal swelling; sense organ (Fig. C) with sense rods in a single pit; seta Aai short, club­shaped and blunt; Api and Ape short and slender and acuminate with apical bristle; Ae, Ap and Ai normal elongate setae. 1+1 eyes, no traces of pigments in mounted specimens. Dorsal cephalic setae spinelike, chaetotaxy as figure J and table 3. Metatrochanteral organ (seta D2) present (Fig. G). All ungues with a small inner tooth and tunica. All unguiculi with corner tooth and apical filament exceeding unguis tip (Figs. K, a–c). Corpus tenaculum with two setae (Fig. H). Dens 3,2,2,1,1 ventral setae, chaetotaxy as in figure E and table 3. Mucro narrow, gutterlike, both edges serrate (Fig. F). Anal valve with 3+2 cuticular spines, s0 present, chaetotaxy as in figure I and table 2. Female subanal appendage flattened and apically serrated.

Biogeographic zone 24a.

Remarks: This is the only known species of the caecus ­group from Mexico. The fourth antennal segment is divided into five ringed subsegments; Id1, Id2, Id4, and E6 present on dens, L4 missing. The cuticular spine s0 is present in the anal vale.

Figures

FIGURE 7. A. vazquezae. A, fourth antennal segment; B, apical subsegment of fourth antennal segment; C, apical sensory organ of third antennal segment; D, body setae (a, anterior, b, posterior); E, ventral and dorsal chaetotaxy of the dens; F, mucro; G, metatrochanteral organ; H, tenaculum; I, anal valve chaetotaxy; J, posterior cephalic chaetotaxy; K, foot complex (a, first leg, b, second leg, c, third leg).