Otacilia leibo Fu, Zhang & Zhang, 2016, sp. nov.

Otacilia leibo sp. nov.

Figs 10 A–G, 11A–E

Type material. Holotype ♂, China, Sichuan Province, Leibo County, Ma Lake, 28°25.536′N, 103°47.115′E, 19 May 2012, Luyu Wang leg. Paratypes: 5♂, 12♀, same data as for holotype, Luyu Wang & Mingxin Liu leg.

Etymology. The specific name is a noun in apposition of the type locality.

Diagnosis. The new species is similar to O. pseudostella (Fu et al. 2014: 488, figs 3A–G, 4A–E), but can be distinguished from it by: 1) PEA sharp, pointed in ten o’clock direction (blunt, pointed to twelve o’clock in O. pseudostella); 2) a narrow tegulum (broad in O. pseudostella); 3) CO large (smaller and concealed by the margin of a pair of shallow concavities in O. pseudostella). The male of the new species is also similar to O. zhangi (Fu et al. 2014: 490, fig 5A–F), but can be distinguished from it by: 1) PEA pointed to ten o’clock (pointed to twelve o’clock in O. zhangi); 2) the palp with a RTA and a BTA (with only an RTA in O. zhangi). The new species is similar to O. aurita sp. nov. (Figs 10–11), but can be distinguished from it by: 1) PEA pointed to ten o’clock (pointed to twelve o’clock in O. aurita sp. nov.); 2) E long (shorter, pointed to twelve o’clock in O. aurita sp. nov.); 3) CO anterior (relatively posterior in O. aurita sp. nov.); 4) CD long (shorter in O. aurita sp. nov.).

Description. Male (Fig. 10 A). Total length 2.87–3.46 (n=6). Holotype: body 3.40 long; carapace 1.59 long, 1.34 wide; abdomen 1.69 long, 1.12 wide. Carapace yellowish brown. Eyes sizes and interdistances: AME 0.08, ALE 0.10, PME 0.08, PLE 0.07; AME–AME 0.05, AME–ALE 0.02, PME–PME 0.10, PME–PLE 0.07. MOA 0.23 long, front 0.21 wide, back 0.25 wide. Clypeus 0.11 high. Cheliceral promargin with three well-separated teeth, retromargin with two teeth close to each other. Labium and gnathocoxae brown. Legs light yellowish. Leg measurements: leg I 5.39 (1.46, 0.37, 1.54, 1.27, 0.75), II 4.27 (1.15, 0.33, 1.10, 0.98, 0.71), III 3.68 (1.06, 0.34, 0.68, 0.96, 0.64), IV 5.64 (1.54, 0.47, 1.28, 1.49, 0.86). Abdomen yellow brown, anterior half with large dorsal scutum, nearly occupying nearly 4/5 of abdomen length; posterior half dark grey, without distinct chevron-shaped markings dorsally. Venter yellow brown.

Palp (Figs 10 E–G, 11A–C): BTA short, RTA with wide base and sharp tip. E long, originating at about 9 o'clock, thin apically, prolaterally with a sharp PEA, retrolaterally with membranous TA near E base. Tegulum widest in middle part.

Female (Fig. 10 B). Total length 3.87–4.79 (n=10). One paratype: body 4.47 long; carapace 1.77 long, 1.56 wide; abdomen 2.57 long, 1.68 wide. Carapace yellow brown. Eyes sizes and interdistances: AME 0.07, ALE 0.10, PME 0.09, PLE 0.08; AME–AME 0.05, AME–ALE 0.03, PME–PME 0.09, PME–PLE 0.06. MOA 0.24 long, front 0.21 wide, back 0.26 wide. Clypeus 0.12 high. Leg measurements: I 6.24 (1.74, 0.46, 1.82, 1.51, 0.71); II 5.22 (1.41, 0.42, 1.31, 1.25, 0.83); III 4.53 (1.32, 0.38, 1.02, 1.09, 0.72); IV 6.69 (1.77, 0.51, 1.58, 1.85, 0.98). Abdomen dark grey dorsally, without dorsal scutum and chevron-shaped markings dorsally.

Epigyne (Figs 10 C–D, 11D–E): CO large, widely separated, by distance slightly larger than their diameter, situated anteriorly. CD thin and long, connected to two transparent BU. SP small, separated by distance equal to their diameter, located posteriorly. FD arising anteriorly from SP.

Distribution. Known only from the type locality, Sichuan, China (Fig. 18).