Ariadna ipojuca, Giroti & Brescovit, 2018

Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), Zootaxa 4400 (1), pp. 1-114: 93

publication ID 10.11646/zootaxa.4400.1.1

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scientific name

Ariadna ipojuca

new species

Ariadna ipojuca   new species

Figures 58 View FIGURE 58 , 71 View FIGURE 71

Type-material. ♂ holotype from Mata do Oiteiro , Ipojuca [08°24'00''S; 35°03'45''W], Ceará, Brazil, XII.2007 ‒ II.2008, A. Costa leg., deposited in IBSP 133641). GoogleMaps  

Diagnosis. Ariadna ipojuca   n. sp. is similar to A. boliviana   , A. isthmica   and A. gaucha   n. sp. due to the morphology of the male palp ( Figs 37A ‒B View FIGURE 37 , 44A ‒B View FIGURE44 , 58G ‒H View FIGURE 58 , 61A ‒B View FIGURE 61 ) and metatarsi IV ( Figs 36F View FIGURE 36 , 43F View FIGURE 43 , 58F View FIGURE 58 , 60F View FIGURE 60 ) but differ by the presence of palps with a longer mid-portion and embolus, with a smooth curvature ( Fig. 58G ‒H View FIGURE 58 ), and metatarsi I with a series of ventro-prolateral macrosetae that decrease in size ( Fig. 58C ‒E View FIGURE 58 ).

Etymology. The specific name is a noun in apposition taken from the type locality, Ipojuca, Ceará, Brazil.

Description. Male (Holotype). Carapace and chelicerae brownish orange ( Fig. 58A View FIGURE 58 ). Endites orange; labium dark orange. Sternum orange with darker margins, and three pairs of fainted dark marginal areas ( Fig. 58B View FIGURE 58 ). Palps light orange ( Fig. 58G ‒H View FIGURE 58 ). Legs light brownish orange, pairs I ‒II darker, with fainted dark diffuse rings in the distal region of the tibia, metatarsi and tarsi ( Fig. 58C ‒E View FIGURE 58 ). Abdomen grey, lighter ventrally ( Fig. 58A ‒B View FIGURE 58 ). Total length 5.84; carapace 2.88 long, 1.84 wide. Palps: tibia incrassated, with the dorso-ventral diameter almost one and a half times longer than the bulb; bulb sub-rectangular, mid-portion slightly longer than the embolus and with a smooth curvature forwards; embolus with a tubular tip ( Fig. 58G ‒H View FIGURE 58 ). Legs: robust and coated with setae ( Fig. 58C ‒F View FIGURE 58 ); metatarsi IV sinuous, in lateral view ( Fig 58F View FIGURE 58 ); tarsal brush of putative chemosensory setae present in tarsi I ‒IV, extending to the median region of the metatarsi IV ( Fig. 58F View FIGURE 58 ), but reduced in leg I. Leg formula: II-I-IV-III. Leg measurements: I, femur 2.84, patella 1.12, tibia 2.4, metatarsus 2.6, tarsus 0.68, total 9.64; II, 2.76, 1.08, 2.52, 2.72, 0.68, 9.76; III, 2.0, 0.88, 1.56, 1.72, 0.6, 6.76; IV, 2.32, 1.04, 1.8, 1.64, 0.6, 7.4. Macrosetae: I, femur D0-0/1- 0-1-0-1-1-2-0, P0-0-0-0-0-1-0-1-0; tibia D0-0-0-0-1-0-1-0, P1/0-1-0-1-0-1-0, vp2/1-0-0-0-0-0-1, vr2-0-1-0/1-1-1- 1, R1-1-0-1-0-1-0; metatarsus vp0-0-1-1-1-1-1-0 (decreasing in length), vr0-1-0-0-0-0-0-1 ( Fig. 58C ‒E View FIGURE 58 ); II, femur D0-1-0-1-0-1-1-2-0, P0-0-0-0-0-0-1-1-0; tibia D0-0-0-0-0/1-0-1-0, P0-1-0-1-0-1-0, vp0-0-0-0-1-1/0-1, vr2-0/1-1- 1-1-0-1, R1-0-1-0-1-0-1; metatarsus vp1-0-0-0-0-0-1, vr1-0-0-1-0-0-1, R0-0-1-0-0-1/0-0-0; IV, femur D1-1-1-0-1- 0-0-0, R0-0-0-0-0-0-1-0; metatarsus vp0-0-0-0-0-0-1, vr metatarsal comb with 3-4 macrosetae.

Female. Unknown

Distribution. Only known from the type locality ( Fig. 71 View FIGURE 71 ).