The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae)
Author
Giroti, André Marsola
Author
Brescovit, Antonio Domingos
text
Zootaxa
2018
2018-03-26
4400
1
1
114
journal article
30419
10.11646/zootaxa.4400.1.1
2b7bf048-65d5-4814-bbdb-59d53d15b00e
1175-5326
1207641
59CC08B8-5B13-42EC-943E-C930D7D0DD7F
Ariadna perkinsi
Simon, 1900
Figures 31
,
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 209956
);
Maui
[
20°48'N
;
156°20'W
], 1imm.,
VII.2
0 14,
E. Armstrong
leg. (
IBSP 209955
).
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
,
18A, F
,
20A, F
,
22A, F
,
31A, E
,
45A, F
,
47A, F
,
50A, F
), but males differ by the presence of metatarsi I sinuous, with a strong bent in the median region, without macrosetae (
Fig. 31D
); females are distinguished by the presence of an anterior receptaculum with lobes flattened laterally, with irregular cuticle (
Fig.
31I
‒J
).
Description. Male (
Holotype
).
Carapace and chelicerae orange (
Fig. 31A
). Endites light orange; labium orange. Sternum orange with darker margins (
Fig. 31B
). Palps light orange (
Fig. 31C
). Legs orange, with pairs I‒II darker. Abdomen whitish grey, with a fainted dark dorsal pattern comprising arrow-shaped marks (
Fig. 31A‒B
). Total length 7.0; carapace 3.7 long, 2.55 wide. Carapace with cephalic region elevated (
Fig. 31A
). 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
). Legs: robust and coated with setae (
Fig. 31D
); 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.
FIGURE 31.
Ariadna perkinsi
Simon, 1900
. Male (Holotype) from Kauai (NHM 1904.X.24.3) (A‒D): habitus, dorsal (A) and ventral view (B); left palp, retrolateral view (C); right metatarsi I, ventral view (D). Female from Oahu (IBSP 209956) (E‒J): habitus, dorsal (E) and ventral view (F); right leg I, prolateral (G) and retrolateral view (H); internal genitalia, lateral view (I); anterior receptaculum, ventral view (J). Scale bar: 1mm.
Female (IBSP 209956).
Carapace brownish yellow. Chelicerae dark reddish brown, almost black (
Fig. 31E
). 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
). 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
). Abdomen lighter, with a conspicuous dark dorsal pattern comprising arrow-shaped marks, and two dark ventral spots next to the spinnerets (
Fig. 31E‒F
). Total length 6.8; carapace 3.28 long, 1.92 wide. Carapace with cephalic region elevated (
Fig. 31E
). Legs: robust and coated with setae (
Fig. 31G‒H
); legs I‒II with ventroprolateral and ventro-retrolateral tibial and metatarsal macrosetae of different sizes (
Fig. 31G‒H
). 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
); 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
).
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
).