Ariadna perkinsi Simon, 1900

Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), Zootaxa 4400 (1), pp. 1-114: 51-53

publication ID 10.11646/zootaxa.4400.1.1

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Ariadna perkinsi Simon, 1900


Ariadna perkinsi Simon, 1900 

Figures 31View FIGURE31, 67

A. perkinsi Simon, 1900: 445  , pl. XV, fig. 1 (♂ holotype from Kauai [22°05'N; 159°03'W], Hawaii, USA, deposited in NHM 1904.X.24.3; paratypes: ♀ from Oahu [21°28'N; 157°59'W], Hawaii, USA, deposited in NHM 1904.X.3.4; 2 immatures from Hawaii, USA, Lolle leg., deposited in NHM 1904.X.24.4‒5, all examined).— World Spider Catalog (2018).


Additional material examined. USA: Hawaii State: Oahu [21°28'N; 157°59'W], 1♀, VII.2014, E. Armstrong leg. ( IBSP 209956View Materials); Maui [20°48'N; 156°20'W], 1imm., VII.2 0 14, E. Armstrong leg. ( IBSP 209955View Materials).GoogleMaps 

Diagnosis. Ariadna perkinsi  is similar to A. crassipalpa  , A. mollis  , A. calilegua  , A. changellkuk  , A. boesenbergi  and A. levii  due to the dark abdominal pattern with arrow-shaped marks ( Figs 1A ‒CView FIGURE 1, 18A, FView FIGURE 18, 20A, FView FIGURE 20, 22A, FView FIGURE 22, 31A, EView FIGURE31, 45A, FView FIGURE 45, 47A, FView FIGURE 47, 50A, FView FIGURE 50), but males differ by the presence of metatarsi I sinuous, with a strong bent in the median region, without macrosetae ( Fig. 31DView FIGURE31); females are distinguished by the presence of an anterior receptaculum with lobes flattened laterally, with irregular cuticle ( Fig. 31I ‒JView FIGURE31).

Description. Male (Holotype). Carapace and chelicerae orange ( Fig. 31AView FIGURE31). Endites light orange; labium orange. Sternum orange with darker margins ( Fig. 31BView FIGURE31). Palps light orange ( Fig. 31CView FIGURE31). Legs orange, with pairs I ‒II darker. Abdomen whitish grey, with a fainted dark dorsal pattern comprising arrow-shaped marks ( Fig. 31A ‒BView FIGURE31). Total length 7.0; carapace 3.7 long, 2.55 wide. Carapace with cephalic region elevated ( Fig. 31AView FIGURE31). Palps: tibia incrassated, with the dorso-ventral diameter longer than the bulb; bulb rounded, mid-portion slightly shorter than the embolus, with an anterior bump; embolus tubular and slightly curved ( Fig. 31CView FIGURE31). Legs: robust and coated with setae ( Fig. 31DView FIGURE31); tarsal brush of putative chemosensory setae present on legs I ‒III. Leg formula: II-I-IV-III. Leg measurements: I, femur 4.3, patella 1.25, tibia 4.0, metatarsus 3.45, tarsus 0.75, total 13.75; II, 3.95, 1.3, 4.15, 3.65, 0.75, 13.8; III, 2.85, 1.05, 2.5, 2.55, 0.7, 9.65; IV, 3.3, 1.3, 2.85, 2.7, 0.65, 10.8. Macrosetae: I, femur d0-0-0-0-0-0- 2, p0-0-0-0-0-1-1; tibia p0-0-0-0-1-0-1, vp0-0-0-0-0-0-0-0-0-0-1, vr1-1-1-1-1-1-1-1-1-1-1, r0-0-1-0-1-0-1-0-1-0; II, femur d0-0-0-1-0-0-2, p0-0-0-0-0-0-1; tibia p0-1-0-0-1-0-0-1-0, vp0-0-0-0-0-0-0-0-1, vr1-1-1-0-0-0-0-1-1, r0- 0-1-0-1-0-1-0-1-0; IV, femur d0-1-1-0-0-0-0; metatarsus vr metatarsal comb with 2 macrosetae.

Female ( IBSP 209956). Carapace brownish yellow. Chelicerae dark reddish brown, almost black ( Fig. 31EView FIGURE31). Endites brownish yellow, with the distal end dark; labium dark orange. Sternum yellow with darker margins, and three pairs of fainted dark marginal areas ( Fig. 31FView FIGURE31). Palps brownish yellow; tibia and tarsus reddish orange. Legs brownish yellow with pairs I ‒II darker, and with distal region of metatarsus and tarsus marbled with dark pigment ( Fig. 31G ‒HView FIGURE31). Abdomen lighter, with a conspicuous dark dorsal pattern comprising arrow-shaped marks, and two dark ventral spots next to the spinnerets ( Fig. 31E ‒FView FIGURE31). Total length 6.8; carapace 3.28 long, 1.92 wide. Carapace with cephalic region elevated ( Fig. 31EView FIGURE31). Legs: robust and coated with setae ( Fig. 31G ‒HView FIGURE31); legs I ‒II with ventroprolateral and ventro-retrolateral tibial and metatarsal macrosetae of different sizes ( Fig. 31G ‒HView FIGURE31). Leg formula: I- II-IV-III. Leg measurements: I, femur 2.24, patella 1.04, tibia 1.84, metatarsus 1.6, tarsus 0.52, total 7.24; II, 2.0, 0.96, 1.8, 1.4, 0.48, 6.64; III, 1.52, 0.8, 1.2, 1.08, 0.48, 0.48, 5.08; IV, 1.84, 1.04, 1.72, 1.4, 0.52, 6.52. Macrosetae: I, femur D0-0-0-0-0-0-1, p0-0-0-0-1-1-1; tibia vp1-1-1/0-1-1-1-1-1-1/0-1, vr1-1-1-1-1-1-1-1-1-1; metatarsus vp1- 1-1-1-1-1-1-1-1, vr1-1/0-1-1-1-1/0-1-1-1/0-1-1 ( Fig. 31G ‒HView FIGURE31); II, femur d0-0-1-0-0-1-1, p0-0-0-0-1/0-0-1; tibia vp1-1/0-1-1/0-1-1-1-1-1, vr1-1-1/0-1-1-1-1-1-1-1; metatarsus vp1-1-1-1-1/0-1-1-1-1, vr1-1-1-1-1-1-1-1; IV, femur d0-1/0-0-0-0-0-0; metatarsus vr metatarsal comb with 4 macrosetae. Internal genitalia: anterior receptaculum with the dorsal lobe almost three timest shorter than the ventral one, and glandular ducts plate in the median region ( Figs 31 I ‒JView FIGURE31).

Variation. Females (n=4): Total length: 6.8‒11.6; carapace 2.8‒5.28 long, 1.7‒3.2 wide; femur I 2.0‒3.36. Distribution. Hawaii ( Fig. 67View FIGURE67).


Instituto Biologico de Sao Paulo














Ariadna perkinsi Simon, 1900

Giroti, André Marsola & Brescovit, Antonio Domingos 2018

A. perkinsi

Simon 1900: 445