Ariadna caerulea Keyserling 1877
Creators: name: Giroti, André Marsola
name: Brescovit, Antonio Domingos
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Segestriidae
Ariadna
Ariadna caerulea

description: Ariadna caerulea Keyserling, 1877
Figures 24‒25, 68
Ariadne caerulea Keyserling, 1877: 227 (Immature lectotype and lectoparatype from Bogotá [04°35'53"N; 74°04'33"W], Cundinamarca, Colombia, deposited in NHM 90.7.1.478.9, designated by Beatty (1970), examined). Ariadna caerulea— Petrunkevitch (1911: 131).— Bonnet (1955: 732).— Beatty (1970: 465, figs 44‒45, 49).— World Spider Catalog (2018).
Ariadna coerulea — Mello-Leitão (1943: 233).
Additional material examined. COLOMBIA: Magdalena Department: S side of Sierra Nevada de Santa Marta [10°51'59"N; 73°42'59"W], 8‒11,000ft., 1♂, IV.1938, T.D. Cabot leg. (MCZ 46061); Cundinamarca Department: Suesca [05°06'N; 73°48'W], Vivenda Santa Rosa, 2600m, 1♂, 31.III.2010, L. Sánches leg. (ICN-AR 4762); Bogotá [04°35'53"N; 74°04'33"W], 1♀ (MNHNP-AR).
Diagnosis. Males of Ariadna caerulea are similar to A. ubajara n. sp. due to the morphology of the palps (Figs 25A‒B, 59F‒G) and metatarsi I (Figs 24C‒E, 59C‒E), but differ by the presence of males with the mid-portion strongly bent forwards and a more tapered embolus tip (Fig. 24C‒E); females are similar to A. boliviana, A. isthmica and A. gaucha n. sp. due to the macrosetae pattern of tibiae I‒II, but differ from these species, except A.
isthmica, by the presence of anterior receptaculum with the ventral lobe shorter than the dorsal one; it differs from A. isthmica by the presence of a ventral lobe longer and more sinuous (Fig. 25C‒D).
Description. Male (ICN-Ar 4762). Carapace and chelicerae reddish brown (Fig. 24A). Endites brownish orange; labium dark brownish orange. Sternum brownish orange with darker margins, and three pairs of dark marginal areas (Fig. 24B). Palps light brownish orange (Fig. 25A‒B). Legs brownish orange, with pairs I‒II darker (Fig. 24C‒E). Abdomen grey, lighter ventrally (Fig. 24A‒B). Total length 8.2; carapace 3.8 long, 2.6 wide. Palps: tibia incrassated, with the dorso-ventral diameter similar to the bulb; bulb sub-rectangular, mid-portion shorter than the embolus and abruptly curved forwards; embolus tapered and with a tubular tip; (Fig. 25A‒B). Legs: slender and coated with setae (Fig. 24C‒E); tarsal brush of putative chemosensory setae present in legs I‒IV, reduced in pair I, and extending to the distal region of metatarsi III‒IV. Leg formula: I-II-IV-III. Leg measurements: I, femur 3.64, patella 1.32, tibia 2.8, metatarsus 3.0, tarsus 0.84, total 11.6; II, 3.4, 1.36, 2.84, 3.0, 0.84, 11.44; III, 2.44, 1.08, 1.84, 1.84, 0.76, 7.96; IV, 2.84, 1.32, 2.2, 1.92, 0.8, 9.08. Macrosetae: I, femur D0-0-1-0-0-2-0, P0-0-0-0-0-1-0; patella P1, R1-1; tibia D0-0-0-1-0-0-0, P0-1-0-1-0-1-0, vr2-0-0-0-0-0/1-1, R1-1-1-0/1-1-0; metatarsus vp1-0-0-0- 0-0-0, vr0-0-0-0-0-0-1 (Fig. 24C‒E); II, femur D0-1-1-0/1-0-2-0, P0-0-0-0-1/0-1-0; patella P0/1, R1; tibia P0-1-0- 1-0-1-0, vp0-0-0-0-0-0-1, vr2-0-1-0-1-1-1, R1-0-0/1-1-0-1-0; metatarsus vp1-0-0-0-0-0-0, vr1-0-0-0-0-0-1; IV, femur D1-1-1-1-1-1-1-1-0-2-0; tibia r0-0-0-0-0-1-0; metatarsus vp0-0-0-0-0-0-1/2, vr metatarsal comb with 3-4 macrosetae, r0-0-1/0-0-0-0-0.
Female (MNHNP-AR 25233). Carapace brownish orange. Chelicerae reddish orange, darker than the carapace (Fig. 24F). Endites brownish orange; labium dark brownish orange. Sternum brownish orange with darker margins (Fig. 24G). Palps reddish orange, darkening gradually in distal direction. Legs orange, with pairs I‒II darker (Fig. 24H‒I). Abdomen as in male (Fig. 24F‒G). Total length 10.64; carapace 4.96 long, 2.84 wide. Carapace with wavy margins (Fig. 24F). Legs: robust and coated with setae; legs I‒II with ventro-prolateral and ventro-retrolateral tibial macrosetae of similar size, and metatarsal macrosetae of different sizes (Fig. 24H‒I). Leg formula: I-II-IV-III. Leg measurements: I, femur 3.68, patella 1.76, tibia 3.08, metatarsus 2.92, tarsus 0.84, total 12.28; II, 3.44, 1.68, 2.92, 2.8, 0.84, 11.68; III, 2.68, 1.4, 1.88, 2.0, 0.8, 8.76; IV, 3.48, 1.76, 2.8, 2.32, 0.8, 11.16. Macrosetae: I, femur d0-0-0-0-0/1-2/1-0, p0-0-0-0-2-0-0; tibia p1-0-1-0-1-0, vp1-0-1-0-1-0-1-0, vr1-0-1-0-1-0-1- 0, r0-1-0-0-1-0; metatarsus vp1-1-1-1-1-1-1-1-1-1-1-1, vr1-1-1-1-1-1-0-1-1-1-1, (Fig. 24H‒I); II, femur d0-0-0-0- 1-1-0, P0-0-0-0-1-1-0; tibia P0-0-1-0-1-0, vp1-0-0/1-0-1-0-1-0, vr1-0-1-0-1-0-1-0, R0-1-0-0-1-0; metatarsus vp1- 1-1-1-1-1-1-1-1-1-1, vr1-1-1-1-0-1-1-0/1-1-1-1; IV, metatarsus vp0-0-0-0-0-0-1, vr metatarsal comb with 4 macrosetae. Internal genitalia: anterior receptaculum with the glandular ducts plate extending to the proximal region of the dorsal lobe (Fig. 25C‒D).
Variation. Male (n=2): Total length 3.84‒8.2; carapace 2.16‒3.8 long, 1.68‒2.6; femur I 2.72‒3.64.
Distribution. North and center of Colombia (Fig. 68).
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 41-44, DOI: 10.11646/zootaxa.4400.1.1, http://zenodo.org/record/1207641