Four new species of the genus Otacilia Thorell, 1897 from Hunan Province, China (Araneae, Phrurolithidae) Author Jin, Chi Author Fu, Lina Author Yin, Xiangchu Author Zhang, Feng text ZooKeys 2016 620 33 55 http://dx.doi.org/10.3897/zookeys.620.7982 journal article http://dx.doi.org/10.3897/zookeys.620.7982 1313-2970-620-33 3223A81C463040FA99672A80B4FD2039 3223A81C463040FA99672A80B4FD2039 Taxon classification Animalia Araneae Phrurolithidae Otacilia hippocampa sp. n. Figs 1, 2, 3 Type material. Holotype ♂, China, Hunan Province: Dao County, Qingtang Town, Dajiangyuan Village, Mt. Jiucailing ( 25°27'37.678"N , 111°21'12.499"E ), 448 m a.s.l., 29 September 2015, Chi Jin leg. Paratypes: 2♀2♂, same data as for holotype. Etymology. The species name is taken from the Latin generic name of the seahorse, " Hippocampus ", referring to the seahorse-shaped internal ducts (copulatory duct, connecting tube and spermatheca) in the female epigyne; adjective. Diagnosis. The male can be distinguished from all other armatissima group species, except Otacilia bicolor Jaeger & Wunderlich, 2012, Otacilia onoi Deeleman-Reinhold, 2001 and Otacilia truncata Dankittipakul & Singtripop, 2014, by having a long DTA and can be distinguished from these three species by the absence of conductor (Figs 2 A-D , 3 A-C ). The female of the new species can be easily distinguished from all of the other armatissima group species by the seahorse-shaped internal ducts (except the bursae), whereas they are S-shaped or crescent-shaped in the other congeners (Figs 2 E-G , 3 D-E ). Description. Male (Fig. 1 A-B ). Total length 2.17-2.65 (n = 3). Holotype: body 2.65 long; carapace 1.28 long, 1.12 wide; abdomen 1.37 long, 0.90 wide. Carapace yellowish brown, with black marginal bands; fovea longitudinal, brown. Eye diameters: AME 0.08, ALE 0.09, PME 0.08, PLE 0.09. Eye interdistances: AME-AME 0.02, AME-ALE 0.01, PME-PME 0.09, PME-PLE 0.05, ALE-PLE 0.07. MOA 0.19 long, front 0.17 wide, back 0.25 wide. Clypeus 0.14 high. Chelicerae with two strong anterior bristles; promargin with three well-separated teeth, and retromargin with two teeth close to each other. Labium and sternum dark yellow. Legs light yellowish brown; all femora with distal black distal annulus; patellae I-II black, patellae III-IV with distal black annulus; tibiae I-II almost all black, tibiae III-IV with black distal annulus; metatarsi I-II distal half part black, metatarsi III-IV with black distal annulus. Measurements of legs: leg I 4.95 (1.29, 0.49, 1.39, 1.23, 0.55), II 4.09 (1.11, 0.46, 1.01, 0.98, 0.53), III 3.59 (0.91, 0.44, 0.74, 0.94, 0.56), IV 5.19 (1.36, 0.45, 1.14, 1.49, 0.75). Leg formula: 4123. Femur I with two dorsal spines and three prolateral spines, femur II with one dorsal spine and two prolateral spines, femur III lacks dorsal spine, femur IV with one dorsal spine; tibia I with six proventral spines and seven retroventral spines, tibia II with six pairs of ventral spines; metatarsus I with four pairs of ventral spines, metatarsus II with four proventral spines and three retroventral spines. Femora I-III lack dorsal spines, femur IV four with one dorsal spine, femur I with three prolateral spines; tibia I with six proventral spines and seven retroventral spines, tibia II with six proventral spines and five retroventral spines; metatarsus I with four pairs of ventral spines, metatarsus II with four proventral spines and three retroventral spines. Abdomen oval, dorsum light grey, with several chevron-like black stripes, anterior half with a small dorsal scutum; venter light grey. Figure 1. Otacilia hippocampa sp. n. A male habitus, dorsal view B same, ventral view C Female habitus, dorsal view D same, ventral view. Palp (Figs 2 A-D , 3 A-C ). Femur distally with an inflated hump on ventral side and a retrolateral concavity. RTA basally thick, tapering to a sharp apex, bent prolaterally. DTA shaped similarly to RTA, with one spine basally. Embolus short, needle-like. Conductor absent. Tegular apophysis triangular, sclerotized. Figure 2. Otacilia hippocampa sp. n. A left male palp, ventral view B same, dorsal view C same, prolateral view D same, retrolateral view E epigyne, ventral view F same, cleared by potassium hydroxide, ventral view G vulva, dorsal view. Figure 3. Otacilia hippocampa sp. n. A left male palp, ventral view B same, dorsal view C same, retrolateral view D epigyne, ventral view E vulva, dorsal view. Scale bars equal for A and B, equal for D and E. Female (Fig. 1 C-D ). Total length 2.56-2.96 (n = 2). One paratype: body 2.96 long; carapace 1.47 long, 1.22 wide; abdomen 1.49 long, 0.99 wide. Eye diameters: AME 0.07, ALE 0.09, PME 0.08, PLE 0.10. Eye interdistances: AME-AME 0.03, AME-ALE 0.01, PME-PME 0.09, PME-PLE 0.06, ALE-PLE 0.09. MOA 0.22 long, front 0.18 wide, back 0.27 wide. Clypeus 0.13 high. Leg measurements: I 5.40 (1.41, 0.58, 1.54, 1.32, 0.55); II 4.53 (1.21, 0.53, 1.16, 1.04, 0.59); III 3.96 (1.04, 0.46, 0.81, 1.02, 0.63); IV 5.63 (1.46, 0.50, 1.27, 1.60, 0.80). Leg formula: 4123. Leg spination as in male. Abdomen light grey, anterior half lacks dorsal scutum. Other characters as in male. Epigyne (Figs 2 E-F , 3D): median plate narrow, with parallel lateral margin; copulatory openings situated centrally, tiny and pore-like. Vulva (Figs 2G, 3 E-F ): copulatory ducts short, connected with a pair of slender tubes leading to the large, transparent ovoid bursae; spermathecae located posteriorly, small and ovoid, separated by more than one spermatheca's diameter; connecting tubes curved and sigmoid. Glandular appendages absent. Distribution. Known only from the type locality, Hunan, China (Fig. 13).