New species and records of Otiothopinae from the Southern Atlantic Rainforest, with notes on the claw tufts in Fernandezina Birabén (Araneae: Palpimanidae) Author Castro, Diogo Author Baptista, Renner Author Grismado, Cristian Author Ramírez, Martín text Zootaxa 2015 4012 3 465 478 journal article 10.11646/zootaxa.4012.3.3 d2877293-a397-4f4d-9154-04e3c5d21f45 1175-5326 241787 CA20EF27-6C23-4FCA-AD05-BE13D73734F1 Otiothops atalaia sp. n. ( Figs 1–2 ) Type material. Holotype male, Parque Nacional Municipal Fazenda Atalaia , 22°18’32”S , 42°00’07”W , Macaé, Rio de Janeiro, Brazil , 27 September 2009 , Atlantic Rainforest, litter, elevation 45 m , V. Brandão, M. da Costa, G. Cardoso, A. Pérez, G. Marquez ( MNRJ 06813). Paratypes : 2 females , same data as holotype except 29 September– 4 October 2009 , pitfall trap ( MNRJ 06814). Other material examined. BRAZIL : Rio de Janeiro : Macaé : 1 male , Parque Nacional Municipal Fazenda Atalaia , 29 September – 4 October 2009 , Atlantic Rainforest, pitfall trap, V. Brandão, M. da Costa, G. Cardoso, A. Pérez, G. Marquez ( UFRJ MAC 2075). Etymology. The specific name is a noun in apposition taken from the type locality. Diagnosis . The male pedipalp is similar to that of Otiothops macleayi Banks, 1929 by the straight embolus which is branched at the tip (see Platnick 1975 , figs 5–8), but can be distinguished by the longer, twisted branching filament, by the less salient embolar insertion on the bulb, and by the more inflated bulb, which is almost the same length as the cymbium ( Figs 1 h–j, 2b–c). The female internal genitalia ( Fig. 2 a) resemble those of O. goytacaz sp. n. ( Figs 3 d, 4a) by having an anteromedian projection, but differ by having a broader base to this projection, a wider sclerotized area with a ringed texture, and also by having two smaller anterodorsal diverticula (the left one apparently collapsed) arising from the median receptacles ( Fig. 2 a). FIGURE 1. Otiothops atalaia sp. n. , habitus and details of preserved specimens: a–d , female paratype; e–j , male holotype; a , e , dorsal views; b , f , lateral views; c , g , ventral views; d , abdominal ventral scutum; h–j , male left pedipalp; h , prolateral view; i , ventral view; j , retrolateral view. FIGURE 2. Otiothops atalaia sp. n. , copulatory organs: a , female paratype, KOH digested internal genitalia, dorsal view (AP = anteromedian projection, AD = anterodorsal diverticula, MR = median receptacula, P = pedicel posterior apodeme); b–c , male holotype; b , left bulb, ventral view; c , same, prolateral view. Description . Male ( holotype ). Total length 4.27. Carapace 2.00 long, 1.28 wide. Femur I 1.33 long, 0.57 high. Posterior median eyes almost touching ( Fig. 1 e). Paturon with inconspicuous lateral ridge. Sclerotized portions of body orange brown; abdominal scutum orange brown, unsclerotized portion of dorsal abdomen purplish brown with yellow dots, ventral abdomen lighter and almost uniformly yellowish brown ( Fig. 1 e–g). Tarsi II–IV with claw tufts. Pedipalpal femur not thickened, tibia nearly cup-shaped and almost half palpal bulb size; embolus thin, slightly longer than cymbium, bearing a short membrane at its tip, with a branching twisted distal filament ( Figs 1 h–j, 2b–c). Female ( paratype ). Total length 4.10. Carapace 1.96 long, 1.35 wide. Femur I 1.48 long, 0.65 high. Eyes and chelicerae as in male. Cephalothorax lighter than male ( Fig. 1 a–c). Abdominal scutum small, entire, less sclerotized than male, curved, with entire sclerite present behind epigastric furrow (postepigastric scutum) ( Fig. 1 d), unsclerotized portion of abdomen as in male ( Fig. 1 a–c). Tarsi II–IV with claw tufts. Internal genitalia ( Fig. 2 a) composed of two large and globose median receptacles basally joined, each with anterodorsal diverticulum. In front of the vulva there is an anteriorly directed median structure (anteromedian projection), probably an apodeme; poreplates not seen (but absence not confirmed). Distribution . Known only from the type locality.