Isoctenus, BERTKAU, 1880

Polotow, Daniele & Brescovit, Antonio D., 2009, Revision and cladistic analysis of Isoctenus and description of a new neotropical genus (Araneae, Ctenidae, Cteninae), Zoological Journal of the Linnean Society 155 (3), pp. 583-614 : 586

GENUS ISOCTENUS BERTKAU, 1880 ( FIGS 3–15 )

Isoctenus Bertkau, 1880: 61 . Type species Isoctenus foliiferus Bertkau, 1880 , by monotypy; Pickard- Cambridge, 1897; Mello-Leitão, 1936; Bonnet, 1957: 2311–2312; Lehtinen, 1967: 241; Silva, 2003; Polotow et al., 2005, 2007; Platnick, 2008.

Ctenopsis Schmidt, 1956: 29 . Type species Ctenopsis stellata Schmidt, 1956 (= Isoctenus janeirus ), by monotypy; Lehtinen, 1967: 225; Platnick, 2008. Syn. nov.

Diagnosis: Isoctenus are distinguished from other Cteninae genera by the presence of a cymbial ventral and dorsal retrobasal projection, shape of the cupshaped median apophysis with retrolateral margin well developed, median apophysis with anterior and

Figures

Figure 3. Isoctenus coxalis: A, chelicerae, intermarginal denticles (arrow); B, tarsal organ; C, trichobothria; D, female pedipalpal tarsal claw.

Figure 4. Isoctenus foliifer: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum, dorsal view. Abbreviations: ap, anterior projection of median apophysis; bpe, basal prolateral projection of embolus; bre, basal retrolateral projection of embolus; cp, copulatory pockets; dbr, dorsal branch of RTA; drp, dorsal retrolateral projection of cymbium; iw, internal wall; lf, lateral field; ls, lateral spurs; mf, median field; pp, posterior projection of median apophysis; rdp, retrolateral distal tibial process; stp, subtegulum projection; va, ventral tibial apophysis; vbr, ventral branch of RTA; vdc, ventrobasal depression of cymbium; vfc, ventrobasal fold of cymbium; vrp, ventral retrolateral projection of cymbium; vw, ventral wall. Arrow, copulatory opening. Scale bars: 0.50 mm.

Figure 5. Isoctenus janeirus: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 1.00 mm.

Figure 6. Isoctenus areia sp. nov.: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 0.50 mm.

Figure 7. Isoctenus griseolus comb. nov.: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 1.00 mm.

Figure 8. Isoctenus taperae comb. nov.: A, male palp, ventral view; B, male palp, retrolateral view. Scale bars: 1.00 mm.

Figure 9. Isoctenus ordinario sp. nov.: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 1.00 mm.

Figure 10. Isoctenus eupalaestrus: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 0.50 mm.

Figure 11. Isoctenus segredo sp. nov.: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 0.50 mm.

Figure 12. Isoctenus charada sp. nov.: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 0.50 mm.

Figure 13. Isoctenus herteli comb. nov.: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 0.50 mm.

Figure 14. Isoctenus minusculus comb. nov.: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 0.50 mm.

Figure 15. Isoctenus strandi: A, male palp, ventral view; B, male palp, retrolateral view; C, epigynum, ventral view; D, epigynum dorsal view. Scale bars: 0.50 mm.