Ariadna comata, O. Pickard-Cambridge, 1898

Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), Zootaxa 4400 (1), pp. 1-114: 48-51

publication ID 10.11646/zootaxa.4400.1.1

publication LSID

persistent identifier

treatment provided by


scientific name

Ariadna comata

sp. reval.

Ariadna comata  O. P.- Cambridge, 1898 sp. reval.

Figures 1DView FIGURE 1, 29‒30View FIGURE 29View FIGURE 30, 67View FIGURE67

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)GoogleMaps  ; 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 209944-209952View Materials); 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 209953View Materials)GoogleMaps  ; Chiapas State: 3km SE Custepec ; 1740m; secondary mesophil forest [15°42'51,9''N; 92°56'16,5''W], 1♂, 17.V.2008 ( MCZ 80543View Materials)GoogleMaps  .

Diagnosis. Ariadna comata  is similar to A. bicolor  , A. pilifera  and A. weaveri  due to the morphology of the male palp ( Figs 13A ‒BView FIGURE 13, 28A ‒BView FIGURE 28, 42A ‒BView FIGURE 42) 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 ‒EView FIGURE 29); 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 ‒DView FIGURE 30).

Description. Male ( MCZ 80543View Materials). Carapace and chelicerae dark brownish yellow ( Fig. 29AView FIGURE 29). Endites brownish yellow; labium dark brownish yellow. Sternum brownish yellow with darker margins, and marbled with darker pigment ( Fig. 29BView FIGURE 29). Palps light brownish yellow ( Fig. 30A ‒BView FIGURE 30). Legs brownish yellow with pairs I ‒II darker ( Fig. 29C ‒EView FIGURE 29). Abdomen grey, lighter ventrally ( Fig. 29A ‒BView FIGURE 29). Total length 6.24; carapace 3.12 long, 2.2 wide. Chelicerae not projected ( Fig. 29AView FIGURE 29). 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 ‒BView FIGURE 30). Legs: robust and sparsely coated with setae ( Fig. 29C ‒EView FIGURE 29); tibia I with two distal ventroretrolateral macrosetae lanceolated ( Fig. 29DView FIGURE 29); 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 ‒EView FIGURE 29); 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. 29FView FIGURE 29). Endites brownish orange; labium dark brownish orange. Sternum orange with darker margins, and three pairs of dark marginal areas, the hind one fainted ( Fig. 29GView FIGURE 29). Palps brownish orange, gradually darkening in distal direction. Legs brownish orange with pairs I ‒II darker ( Fig. 29H ‒IView FIGURE 29). Abdomen grey, lighter laterally and ventrally ( Fig. 29F ‒GView FIGURE 29). 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 ‒IView FIGURE 29). 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 ‒IView FIGURE 29); 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 ‒DView FIGURE 30).

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. 67View FIGURE67).


Museum of Comparative Zoology


Instituto Biologico de Sao Paulo














Ariadna comata

Giroti, André Marsola & Brescovit, Antonio Domingos 2018

A. pilifera

O. Pickard-Cambridge 1898