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, 7 ­xii­ 1993. 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 1.6 X 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 D 2) 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 24 a.

Remarks: This is the only known species of the caecus ­group from Mexico. The fourth antennal segment is divided into five ringed subsegments; Id 1, Id 2, Id 4, and E 6 present on dens, L 4 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).