Abdosetae hamata, Jin, Chi, Fu, Jianying & Zhang, Feng, 2015

Jin, Chi, Fu, Jianying & Zhang, Feng, 2015, A review of the genus Abdosetae (Araneae: Phrurolithidae) from China, Zootaxa 4007 (1), pp. 91-103 : 100-102

Abdosetae hamata sp. nov.

Figs 6–7

Type material. Holotype ♂, China, Hainan Province, Changjiang County, Mt. Bawangling, Yajia (19°05′14″N, 109°07′20″E), 441 m a.s.l., 3 February 2015, leg. Chi Jin ( MHBU). Paratypes: 8♀ 2♂, same data as holotype ( MHBU); 10♀ 6♂, Hainan Province, Changjiang County, Mt. Bawangling, Dongyi Scenic (19°07′03″N, 109°09′01″E), 639 m a.s.l., 4 February 2015, leg. Chi Jin and Lina Fu ( MHBU); 5♀, Hainan Province, Changjiang County, Mt. Exianling (19°00′21″N, 109°08′14″E), 282 m a.s.l., 20 May 2009, leg. Shengtao Guo ( MHBU).

Etymology. The species name is derived from the Latin adjective “hamatus”, and refers to the hook-shaped branch located medially on the inner side of the male palpal RTA.

Diagnosis. This new species can be easily distinguished from A. hainan and A. ornata by having one branch on the inner side of the RTA, and the epigyne with a pair of shallow concavities that conceal the copulatory openings in their anterior margins. It can be distinguished from A. digitata sp. nov. and A. falcata sp. nov. by: 1) a RTA branch that is hook-shaped, whereas the other two species have thumb-shaped and sickle-shaped branches, respectively; 2) a knife-shaped TA that is longitudinally orientated, whereas the TA in the other two species is spine-shaped and slightly bent in the retrolateral direction, and canine-shaped and bent in the prolateral direction, respectively; 3) a posterior margin of the epigyne that is clearly “M” shaped medially, whereas it is only slightly convex or excavated in the other two species, respectively; 4) spermathecae and copulatory openings that are in the same horizontal line, whereas they are not in the other two species.

Description. Male. Total length 1.85–2.12 (n=9). Holotype ( Fig. 6 A): total length 2.12; carapace 0.98 long, 0.87 wide; abdomen 1.06 long, 0.74 wide. Carapace yellowish-brown with black marginal bands. In dorsal view, AER and PER slightly recurved; eye diameters: AME 0.08, ALE 0.07, PME 0.07, PLE 0.09; eye interdistances: AME–AME 0.04, AME–ALE 0.01, PME–PME 0.10, PME–PLE 0.03, ALE–PLE 0.07; MOA 0.17 long, front width 0.18, back width 0.23. Clypeus height 0.07. Leg measurements: I 3.59 (0.89 + 0.36 + 0.97 + 0.91 + 0.46), II 3.02 (0.80 + 0.32 + 0.71 + 0.72 + 0.47), III 2.82 (0.75 + 0.30 + 0.56 + 0.73 + 0.49), IV 4.02 (1.03 + 0.34 + 0.90 + 1.11 + 0.64). Leg spination: see Table 1.

Abdomen ovoid, light yellow; posterior half dark with several black chevrons dorsally; flanks black ( Fig. 6 A). Palp ( Figs 6 G–I, 7C–D). Femur swollen on ventral side, with inconspicuous concavity distally on retrolateral side; RTA thick, with beaked tip; RTA prolaterally with one large, basal hump, medially with one short, slender hookshaped branch bent in retrolateral direction and one tooth-like apophysis, apically with one relatively smaller hump; VTH inconspicuous; DTA lamellar, slender, with hooked tip, distant from RTA; cymbium with RBC that is visible from both ventral and dorsal views; tegular apophysis short, longitudinally orientated, knife-shaped and pointed apically; embolus spine-shaped, slender, with sharp tip, pointed towards 12 o’clock position.

Female. Total length 2.09–2.40 (n=23). Paratype ( Fig. 6 B): total length 2.40; carapace 1.02 long, 0.93 wide; abdomen 1.35 long, 0.78 wide. Clypeus height 0.08. Eye diameters: AME 0.07, ALE 0.07, PME 0.07, PLE 0.09; eye interdistances: AME–AME 0.04, AME–ALE 0.01, PME–PME 0.08 PME–PLE 0.03, ALE–PLE 0.06; MOA 0.17 long, front width 0.16, back width 0.22. Leg measurements: I 3.70 (0.96 + 0.39 + 1.02 + 0.89 + 0.44); II 3.12 (0.82 + 0.32 + 0.76 + 0.74 +0.48); III 2.94 (0.78 + 0.32 + 0.57 + 0.76 + 0.51); IV 4.26 (1.09 + 0.40 + 0.91 + 1.18 + 0.68). Leg spination: see Table 1.

Abdomen with a longitudinal black stripe. Carapace darker than male; other characters as in male.

Epigyne ( Figs 6 E–F, 7A–B). With pair of shallow concavities with conspicuous anterior margins, concealing slightly expanded copulatory openings; copulatory ducts relatively long, connected to two oval transparent bursae, bursae with spherical, sclerotized base; spermathecae small and spherical, close together, in same horizontal plane as copulatory openings; bursae and spermathecae connected by short tube.

Distribution. Known from three localities in south-western Hainan ( Fig. 8).

Figures

FIGURE 6. Abdosetae hamata sp. nov.: A male body, dorsal view; B female body, dorsal view; C male abdomen, ventral view; D female abdomen, ventral view; E epigyne, ventral view; F vulva, dorsal view; G male left palp, prolateral view; H same, ventral view; I same, retrolateral view. Scale bars: 0.5 mm (A – D); 0.2 mm (E – I).

FIGURE 7. Abdosetae hamata sp. nov.: A epigyne, ventral view; B vulva, dorsal view; C male left palp, prolateral view; D same, ventral view; E same, retrolateral view. Scale bars: 0.25 mm (A – E).