Ariadna caerulea Keyserling, 1877,

Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), Zootaxa 4400 (1), pp. 1-114: 41-44

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Ariadna caerulea Keyserling, 1877


Ariadna caerulea Keyserling, 1877 

Figures 24‒25View FIGURE 24View FIGURE 25, 68View FIGURE68

Ariadne caerulea Keyserling, 1877: 227  (Immature lectotype and lectoparatype from Bogotá [04°35'53"N; 74°04'33"W], Cundinamarca, Colombia, deposited in NHM, 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 46061View Materials)GoogleMaps  ; Cundinamarca Department: Suesca [05°06'N; 73°48'W], Vivenda Santa Rosa , 2600m, 1♂, 31.III.2010, L. Sánches leg. (ICN-AR 4762)GoogleMaps  ; Bogotá [04°35'53"N; 74°04'33"W], 1♀ ( MNHNP-AR)GoogleMaps  .

Diagnosis. Males of Ariadna caerulea  are similar to A. ubajara  n. sp. due to the morphology of the palps ( Figs 25A ‒BView FIGURE 25, 59F ‒GView FIGURE59) and metatarsi I ( Figs 24C ‒EView FIGURE 24, 59C ‒EView FIGURE59), but differ by the presence of males with the mid-portion strongly bent forwards and a more tapered embolus tip ( Fig. 24C ‒EView FIGURE 24); 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 ‒DView FIGURE 25).

Description. Male (ICN-Ar 4762). Carapace and chelicerae reddish brown ( Fig. 24AView FIGURE 24). Endites brownish orange; labium dark brownish orange. Sternum brownish orange with darker margins, and three pairs of dark marginal areas ( Fig. 24BView FIGURE 24). Palps light brownish orange ( Fig. 25A ‒BView FIGURE 25). Legs brownish orange, with pairs I ‒II darker ( Fig. 24C ‒EView FIGURE 24). Abdomen grey, lighter ventrally ( Fig. 24A ‒BView FIGURE 24). 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 ‒BView FIGURE 25). Legs: slender and coated with setae ( Fig. 24C ‒EView FIGURE 24); 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 ‒EView FIGURE 24); 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. 24FView FIGURE 24). Endites brownish orange; labium dark brownish orange. Sternum brownish orange with darker margins ( Fig. 24GView FIGURE 24). Palps reddish orange, darkening gradually in distal direction. Legs orange, with pairs I ‒II darker ( Fig. 24H ‒IView FIGURE 24). Abdomen as in male ( Fig. 24F ‒GView FIGURE 24). Total length 10.64; carapace 4.96 long, 2.84 wide. Carapace with wavy margins ( Fig. 24FView FIGURE 24). 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 ‒IView FIGURE 24). 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 ‒IView FIGURE 24); 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 ‒DView FIGURE 25).

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. 68View FIGURE68).


Museum of Comparative Zoology














Ariadna caerulea Keyserling, 1877

Giroti, André Marsola & Brescovit, Antonio Domingos 2018

Ariadne caerulea

Keyserling 1877: 227


Audouin 1826