Ariadna comata Giroti & Brescovit, 2018, sp. reval.
Creators: name: Giroti, André Marsola
name: Brescovit, Antonio Domingos
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Segestriidae
Ariadna
Ariadna comata

description: Ariadna comata O. P.- Cambridge, 1898 sp. reval.
Figures 1D, 29‒30, 67
Ariadne comata O. P.- Cambridge, 1898: 235, pl. 30, fig. 8 (♀ holotype from Orizaba [18°51'N; 97°06'W], Vera Cruz, Mexico, Godman & Salvin leg., deposited in NHM 1901.3.3.77, examined).—F. O. P.- Cambridge (1899: 32).— Petrunkevitch (1911: 131).— Bonnet (1955: 732).— Beatty (1970: 461, Syn. with A. pilifera).
Note. The revalidation of this species is based on the examination of the holotype, and also non-type specimens near the type locality.
Additional material examined. MEXICO: Puebla State: Puebla, Villa Juaréz [19°03'06.4"N; 98°13'37.6"W], 1♀, 23.X.1951 (CNAN-Ar 007980); Veracruz State: San Andrés Tuxtla, Estación de Biología Los Tuxtlas (18º35'11.2" N; 95º04'30.5"W), 9♀, 28‒31.VII.2014, A.M. Giroti et al. leg. (IBSP 209944-209952); Cueva de Ruiz Cortinez; entorno; 1067m (18º32'39.2" N; 95º08'36.1"W), 1♀, 28.VII.2014, A.M. Giroti et al. leg. (IBSP 209953); Chiapas State: 3km SE Custepec; 1740m; secondary mesophil forest [15°42'51,9''N; 92°56'16,5''W], 1♂, 17.V.2008 (MCZ 80543).
Diagnosis. Ariadna comata is similar to A. bicolor, A. pilifera and A. weaveri due to the morphology of the male palp (Figs 13A‒B, 28A‒B, 42A‒B) and macrosetae pattern of the tibia II of females, but males differ by the presence of metatarsi I with two conspicuous lateral conical apophyses, one on each side, bearing one macrosetae in the base of the retrolateral, and one blunt macroseta (i.e. globous shaft with rounded tip) on the prolateral one (Fig. 29C‒E); females differ from A. bicolor by the presence of a dorsal lobe shorter than the ventral lobe, from A. weaveri by the expanded ventral lobe and smaller glandular ducts plate, and from A. pilifera by the ventral lobe longer and more sinuous (Fig. 30C‒D).
Description. Male (MCZ 80543). Carapace and chelicerae dark brownish yellow (Fig. 29A). Endites brownish yellow; labium dark brownish yellow. Sternum brownish yellow with darker margins, and marbled with darker pigment (Fig. 29B). Palps light brownish yellow (Fig. 30A‒B). Legs brownish yellow with pairs I‒II darker (Fig. 29C‒E). Abdomen grey, lighter ventrally (Fig. 29A‒B). Total length 6.24; carapace 3.12 long, 2.2 wide. Chelicerae not projected (Fig. 29A). Palps: tibia slightly incrassated, with the dorso-ventral diameter about the same as half of the bulb; bulb sub-rectangular, mid-portion and embolus of equal lengths; embolus tubular, curved and tapered (Fig. 30A‒B). Legs: robust and sparsely coated with setae (Fig. 29C‒E); tibia I with two distal ventroretrolateral macrosetae lanceolated (Fig. 29D); tarsal brush of putative chemosensory setae present on legs I‒IV, but reduced in pair I. Leg formula: I-II-IV-III. Leg measurements: I, femur 3.12, patella 1.16, tibia 2.4, metatarsus 2.32, tarsus 0.96, total 9.96; II, 2.88, 1.16, 2.48, 2.48, 0.88, 9.88; III, 2.08, 0.88, 1.52, 1.56, 0.68, 6.72; IV, 2.44, 1.12, 1.96, 1.72, 0.72, 7.96. Macrosetae: I, femur D0-0-0-0-0-0/1-2, P0-0-0-0-0-1-1; tibia p0-1-0-1-0-1-0, vp0, vr1- 0-0-1-0-0-1, r0-1-0-1-0-1-1(lanceolated); metatarsus vp1-0-0-0-0-0-1, vr0-0-1(blunt)-0-0-0-1 (Fig. 29C‒E); II, femur D0-0-0-0-0-0-2, p0-0-0-0-0-1-1; tibia P0-0-1-0-0-1-0, vp0-0-0-0-0-0-1, vr1-0-1-0-1-0-1; metatarsus vp1-0- 0-1-0-0-1, vr1-0-0-1-0-0-1; IV, femur D1-1-1-0-0-0-0; metatarsus vp0-1-0-0-0-0-1, vr metatarsal comb with 3 macrosetae.
Female (IBSP 209953). Carapace and chelicerae brownish orange, with cephalic region and chelicerae darker (Fig. 29F). Endites brownish orange; labium dark brownish orange. Sternum orange with darker margins, and three pairs of dark marginal areas, the hind one fainted (Fig. 29G). Palps brownish orange, gradually darkening in distal direction. Legs brownish orange with pairs I‒II darker (Fig. 29H‒I). Abdomen grey, lighter laterally and ventrally (Fig. 29F‒G). Total length 10.08; carapace 4.24 long, 2.56 wide. Legs: robust and densely coated with setae; legs I‒II with ventro-prolateral and ventro-retrolateral tibial macrosetae of similar size, and metatarsal macrosetae of different size (Fig. 29H‒I). Leg formula: I-II-IV-III. Leg measurements: I, femur 3.0, patella 1.28, tibia 2.32, metatarsus 2.08, tarsus 0.72, total 9.4; II, 2.8, 1.28, 2.4, 2.16, 0.72, 9.36; III, 2.24, 1.12, 1.56, 1.56, 0.64, 7.12; IV, 2.64, 1.44, 2.08, 1.76, 0.68, 8.6. Macrosetae: I, femur D0-0-0-0-0-0-2, P0-0-0-0-1-1/2-1; tibia P0-1-0-1-0-1-0, vp1- 0-1-0-1-0-1, vr1-0-1-0-1-0-1, R0-0-1-0-1-0-0; metatarsus vp1-1-1-1-1/0-1-1-1, vr1-1-1-1-0-1-1-1 (Fig. 29H‒I); II, D0-0-0-0-0-0-2, P0-0-0-0-0-1-1; tibia P0-1-0-1-0-1-0, vp0-0-0-0-0-0-1, vr1-0-1-0-1-0-1; metatarsus vp1-1-1-1-1- 1-1-1, vr1-1-1-1-1-1-1-1; IV, D1-0-1-0-0-0-0, R0-0-0-0-0-0-1; tibia vr0-0-0-0-0-0-1; metatarsus vp0-1-0-0-0-1, vr metatarsal comb with 4 macrosetae. Internal genitalia: anterior receptaculum with the glandular ducts plate in the median region (Fig. 30C‒D).
Variation. Female (n=10): total lenght 6.96‒12.32; carapace 3.2‒5.0 long, 1.96‒3.0 wide; femur I 2.16‒3.65.
Distribution. Southeast and south of Mexico (Fig. 67).
description: Published as part of Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), pp. 1-114 in Zootaxa 4400 (1) on pages 48-51, DOI: 10.11646/zootaxa.4400.1.1, http://zenodo.org/record/1207641