Arrhopalites lawrencei Palacios­Vargas & Zeppelini, 1995: 12

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 : 16-17

Arrhopalites lawrencei Palacios­Vargas & Zeppelini, 1995: 12 –14, figs. 17–24.

Material examined: Holotype Ψ and 2 paratypes ΨΨ, 18­xi­1991. BRAZIL, Sao Paulo, Eldorado. Tapagem cave. Trajano leg., LESM. 2 paratypes ΨΨ, idem, MZUSP.

Caecus ­group ( Fig. 6 , A–K). Body setae as shown in figure D. Antennae of holotype 1.6X as long as the cephalic diagonal. Ant. IV with six 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 curved and blunt; Ape slender and acuminate; other setae normal and elongate. 1+1 eyes, no traces of pigments in mounted specimens. Dorsal cephalic spines present, chaetotaxy as figure J and table 3. Metatrochanteral organ (seta D2) present (Fig. G). First unguis without inner tooth, all ungues without 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 27.

Remarks: A. lawrencei is similar to A. gnaspinii and A. amorimi , and putatively share an ancestor that 3+2 anal valve cuticular spines. This species presents Id1, Id2 and Id4 on dens.

Figures

FIGURE 6. A. lawrencei. 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).