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	https://doi.org/ 10.11646/zootaxa.4400.1.1
publication LSID	lsid:zoobank.org:pub:59CC08B8-5B13-42EC-943E-C930D7D0DD7F
persistent identifier	https://treatment.plazi.org/id/039B87D1-FFD6-B12E-169B-FBA7C571FCB0
treatment provided by	Plazi
scientific name	Ariadna perkinsi Simon, 1900
status

Treatment

Ariadna perkinsi Simon, 1900 View in CoL

Figures 31 View FIGURE31 , 67 View FIGURE67

A. perkinsi Simon, 1900: 445 View in CoL , 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 209956 View Materials ); Maui [20°48'N; 156°20'W], 1imm., VII.2 0 14, E. Armstrong leg. ( IBSP 209955 View 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‒C View FIGURE 1 , 18A, F View FIGURE 18 , 20A, F View FIGURE 20 , 22A, F View FIGURE 22 , 31A, E View FIGURE31 , 45A, F View FIGURE 45 , 47A, F View FIGURE 47 , 50A, F View FIGURE 50 ), but males differ by the presence of metatarsi I sinuous, with a strong bent in the median region, without macrosetae ( Fig. 31D View FIGURE31 ); females are distinguished by the presence of an anterior receptaculum with lobes flattened laterally, with irregular cuticle ( Fig. 31I ‒J View FIGURE31 ).

Description. Male (Holotype). Carapace and chelicerae orange ( Fig. 31A View FIGURE31 ). Endites light orange; labium orange. Sternum orange with darker margins ( Fig. 31B View FIGURE31 ). Palps light orange ( Fig. 31C View FIGURE31 ). Legs orange, with pairs I‒II darker. Abdomen whitish grey, with a fainted dark dorsal pattern comprising arrow-shaped marks ( Fig. 31A‒B View FIGURE31 ). Total length 7.0; carapace 3.7 long, 2.55 wide. Carapace with cephalic region elevated ( Fig. 31A View 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. 31C View FIGURE31 ). Legs: robust and coated with setae ( Fig. 31D View 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. 31E View 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. 31F View 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‒H View FIGURE31 ). Abdomen lighter, with a conspicuous dark dorsal pattern comprising arrow-shaped marks, and two dark ventral spots next to the spinnerets ( Fig. 31E‒F View FIGURE31 ). Total length 6.8; carapace 3.28 long, 1.92 wide. Carapace with cephalic region elevated ( Fig. 31E View FIGURE31 ). Legs: robust and coated with setae ( Fig. 31G‒H View FIGURE31 ); legs I‒II with ventroprolateral and ventro-retrolateral tibial and metatarsal macrosetae of different sizes ( Fig. 31G‒H View 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‒H View 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 ‒J View 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. 67 View FIGURE67 ).