Ariadna comata O. Pickard-Cambridge 1898
- Dataset
- The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae)
- Rank
- SPECIES
- Published in
- Giroti, André Marsola, Brescovit, Antonio Domingos (2018): The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae). Zootaxa 4400 (1): 1-114, DOI: 10.11646/zootaxa.4400.1.1
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Arachnida
- order
- Araneae
- family
- Segestriidae
- genus
- Ariadna
- species
- Ariadna comata
description
Description. Male (MCZ 80543). Carapace and chelicerae dark brownish yellow (Fig. 29 A). Endites brownish yellow; labium dark brownish yellow. Sternum brownish yellow with darker margins, and marbled with darker pigment (Fig. 29 B). Palps light brownish yellow (Fig. 30 A ‒ B). Legs brownish yellow with pairs I ‒ II darker (Fig. 29 C ‒ E). Abdomen grey, lighter ventrally (Fig. 29 A ‒ B). Total length 6.24; carapace 3.12 long, 2.2 wide. Chelicerae not projected (Fig. 29 A). 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. 30 A ‒ B). Legs: robust and sparsely coated with setae (Fig. 29 C ‒ E); tibia I with two distal ventroretrolateral macrosetae lanceolated (Fig. 29 D); 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 D 0 - 0 - 0 - 0 - 0 - 0 / 1 - 2, P 0 - 0 - 0 - 0 - 0 - 1 - 1; tibia p 0 - 1 - 0 - 1 - 0 - 1 - 0, vp 0, vr 1 - 0 - 0 - 1 - 0 - 0 - 1, r 0 - 1 - 0 - 1 - 0 - 1 - 1 (lanceolated); metatarsus vp 1 - 0 - 0 - 0 - 0 - 0 - 1, vr 0 - 0 - 1 (blunt) - 0 - 0 - 0 - 1 (Fig. 29 C ‒ E); II, femur D 0 - 0 - 0 - 0 - 0 - 0 - 2, p 0 - 0 - 0 - 0 - 0 - 1 - 1; tibia P 0 - 0 - 1 - 0 - 0 - 1 - 0, vp 0 - 0 - 0 - 0 - 0 - 0 - 1, vr 1 - 0 - 1 - 0 - 1 - 0 - 1; metatarsus vp 1 - 0 - 0 - 1 - 0 - 0 - 1, vr 1 - 0 - 0 - 1 - 0 - 0 - 1; IV, femur D 1 - 1 - 1 - 0 - 0 - 0 - 0; metatarsus vp 0 - 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. 29 F). Endites brownish orange; labium dark brownish orange. Sternum orange with darker margins, and three pairs of dark marginal areas, the hind one fainted (Fig. 29 G). Palps brownish orange, gradually darkening in distal direction. Legs brownish orange with pairs I ‒ II darker (Fig. 29 H ‒ I). Abdomen grey, lighter laterally and ventrally (Fig. 29 F ‒ 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. 29 H ‒ 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 D 0 - 0 - 0 - 0 - 0 - 0 - 2, P 0 - 0 - 0 - 0 - 1 - 1 / 2 - 1; tibia P 0 - 1 - 0 - 1 - 0 - 1 - 0, vp 1 - 0 - 1 - 0 - 1 - 0 - 1, vr 1 - 0 - 1 - 0 - 1 - 0 - 1, R 0 - 0 - 1 - 0 - 1 - 0 - 0; metatarsus vp 1 - 1 - 1 - 1 - 1 / 0 - 1 - 1 - 1, vr 1 - 1 - 1 - 1 - 0 - 1 - 1 - 1 (Fig. 29 H ‒ I); II, D 0 - 0 - 0 - 0 - 0 - 0 - 2, P 0 - 0 - 0 - 0 - 0 - 1 - 1; tibia P 0 - 1 - 0 - 1 - 0 - 1 - 0, vp 0 - 0 - 0 - 0 - 0 - 0 - 1, vr 1 - 0 - 1 - 0 - 1 - 0 - 1; metatarsus vp 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1, vr 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1; IV, D 1 - 0 - 1 - 0 - 0 - 0 - 0, R 0 - 0 - 0 - 0 - 0 - 0 - 1; tibia vr 0 - 0 - 0 - 0 - 0 - 0 - 1; metatarsus vp 0 - 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. 30 C ‒ 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.
description
Figures 1 D, 29 ‒ 30, 67
diagnosis
Diagnosis. Ariadna comata is similar to A. bicolor, A. pilifera and A. weaveri due to the morphology of the male palp (Figs 13 A ‒ B, 28 A ‒ B, 42 A ‒ 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. 29 C ‒ 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. 30 C ‒ D).
discussion
Note. The revalidation of this species is based on the examination of the holotype, and also non-type specimens near the type locality.
distribution
Distribution. Southeast and south of Mexico (Fig. 67).
materials_examined
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 (18 º 35 ' 11.2 " N; 95 º 04 ' 30.5 " W), 9 ♀, 28 ‒ 31. VII. 2014, A. M. Giroti et al. leg. (IBSP 209944 - 209952); Cueva de Ruiz Cortinez; entorno; 1067 m (18 º 32 ' 39.2 " N; 95 º 08 ' 36.1 " W), 1 ♀, 28. VII. 2014, A. M. Giroti et al. leg. (IBSP 209953); Chiapas State: 3 km SE Custepec; 1740 m; secondary mesophil forest [15 ° 42 ' 51,9 '' N; 92 ° 56 ' 16,5 '' W], 1 ♂, 17. V. 2008 (MCZ 80543).