Stenoterommata Holmberg, 1881

Indicatti, Rafael P., Chavari, João L., Zucatelli-Júnior, Maurílio, Lucas, Sylvia M. & Brescovit, Antonio D., 2017, Six new species of silk-lined burrow spider genus Stenoterommata Holmberg, 1881 (Araneae, Nemesiidae) from southern Brazil, Zootaxa 4254 (4), pp. 435-456 : 436

Genus Stenoterommata Holmberg, 1881

Stenoterommata Holmberg, 1881: 125 . Type species by original designation, Stenoterommata platensis Holmberg, 1881 . Raven, 1985: 106; Goloboff, 1995: 57; World Spider Catalog, 2016.

Ctenochelus Mello-Leitão, 1923: 61 . Type species by original designation, C. maculatus Mello-Leitão, 1923 . First synonymized by Guadanucci & Indicatti, 2004: 256.

Emended diagnosis. Males of Stenoterommata differ from those of Bayana , Neostothis Vellard, 1925 , Psalistopoides , Pselligmus Simon, 1892b , Prorachias Mello-Leitão, 1924 , Pycnothele and Rachias by the rigid and smooth (and usually longitudinal) parallel keels of the embolus ( Figs 19, 21, 22 , 56–58 ; Indicatti et al., 2008a, fig. 27), and tibia I with a sessile apical retrolateral megaspine ( Figs 32 , 61 ; Goloboff, 1995, figs 72K, 73F; Indicatti et al., 2008a, fig. 28). Females differ from those of Prorachias , Pselligmus , Pycnothele by the absence of scopulae on tibia I, II; from Rachias by the labium wider than long, maxillary posterior heel not produced ( Goloboff, 1995, figs 71A, 72B), and without long, curved setae covering the cuspules. In addition, it also differs by the triangular apical segment of the PLS, and by having a row of enlarged pumpkiniform spigots along the inner edge of the PLS spinning field ( Figs 38, 40 ), in conjunction with well-developed preening combs ( Goloboff, 1995, fig. 8) on the female metatarsi II, and numerous maxillary cuspules ( Fig. 29 ; Goloboff, 1995, figs 71A, 72B, E), usually over 40, up to 160 ( Goloboff, 1995).

Figures

FIGURES 17 – 28. Stenoterommata pavesii sp. nov., male (IBSP 166077). 17 – 23. Left palpal bulb. 17, 18. Prolateral view. 19. Embolus and keels, dorsal view. 20. Tegulum with grooves, detail, prolateral view. 21, 22. Embolus and keels, dorsal view. 22. Keel, detail. 23. Palpal tibia excavation. 24, 25. Carapace, dorsal view. 25. Detail of eye tubercle. 26. Left chelicera, prolateral view. 27. Intercheliceral tumescence, detail. 28. Serrula, frontal view.

FIGURES 56 – 64. Stenoterommata sevegnaniae sp. nov., male (IBSP 114755). 56 – 58. Right palpal bulb, retrolateral view. 57. Embolus and keels. 58. Keels, detail. 59, 60. Serrula, frontal view. 61 – 64. Right leg I, retrolateral view. 61. Megaspine on tibia. 62. Tarsus and scopula, general view. 63. Scopula and claws, retrolateral view. 64. Scopula, detail.

FIGURES 29 – 40. Stenoterommata pavesii sp. nov., male (IBSP 166077). 29, 30. Cuspules on maxilla. 30. Cuspule, detail, lateral view. 31. Sigillum. 32 – 37. Right leg I. 32. Megaspine on tibia, retrolateral view. 33. Tarsal organ, dorsal view. 34. Tarsal trichobothria, dorsal view. 35. Claws, retrolateral view. 36. Scopula, detail. 37. Claw, ventral view. 38 – 40. Spinnerets. 39. Posterior median spinneret. 40. Pumpkiniform spigots, posterior lateral spinneret.