Arrhopalites amorimi Palacios­Vargas & Zeppelini, 1995: 10

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 : 14

Arrhopalites amorimi Palacios­Vargas & Zeppelini, 1995: 10 –12, figs. 9–16.

Material examined: Holotype Ψ and 4 paratypes ΨΨ, 02­v­1987. BRAZIL, Sao Paulo, Iporanga. Casa de Pedra cave. Gaspini­Neto and Trajano leg., LESM. 4 paratypes ΨΨ, 29­ iv­1990. BRAZIL, Sao Paulo, Iporanga. Casa de Pedra cave. Gaspini­Neto and Trajano leg., Museu de Zoologia, Universidade de Sao Paulo, Brazil ( MZUSP).

Caecus ­group ( Fig. 5 , A–K). Body setae as shown in figure D. Antennae of holotype 1.6X as long as the cephalic diagonal. Ant. IV with four 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 acuminate; Ae, Ap and Ai as normal elongate setae. 2+2 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 an inner tooth and tunica. Second and third unguiculi with corner tooth, apical filament exceeding unguis tip in all inguiculi (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: This species is related to A. gnaspinii , and occurs in the same cave system but is found only in a single cave, it strinkingly differs from the closely related species in the group, by possessing two pairs of eyes and four ringed subsegments in Ant. IV (instead of six, as stated in original description). Id1, Id2 and Id4 present on dens, L4 absent.

Figures

FIGURE 5. A. amorimi. 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).