Allomedmassa crassa, Jin & Zhang & Zhang, 2019

Jin, Chi, Zhang, Hongli & Zhang, Feng, 2019, First records of the corinnid genera Allomedmassa Dankittipakul & Singtripop, 2014 and Medmassa Simon, 1887 from China, with the description of a new genus (Araneae: Corinnidae), Zootaxa 4585 (3), pp. 459-477 : 466-467

Allomedmassa crassa sp. nov. (Ṟǖflđ)

Figs 4 D–F, 5

Type material. Holotype: ♂, CHINA: Yunnan Province: Chuxiong City, Ailao Mountain National Nature Reserve (24°42.560′N, 101°01.601′E), 1422 m a.s.l., May 2011, leg. Zongxu Li.

Etymology. The specific name is a Latin adjective meaning "thick", referring to the thick base of the embolus.

Diagnosis. The new species resembles Allomedmassa bifurca sp. nov.; for detailed diagnosis see above. Female unknown.

Description. Male ( Figs 4 D–F, 5). Holotype: body 11.96 long; carapace 5.98 long, 4.55 wide, width/length = 0.76; abdomen 5.98 long, 4.24 wide. Body colouration as in genus description. Diameters of eyes: AME 0.37, ALE 0.27, PME 0.31, PLE 0.33. Eye interdistances: AME–AME 0.24, AME–ALE 0.15, ALE–ALE 1.22, PME–PME 0.33, PME–PLE 0.40, PLE–PLE 1.76, ALE–PLE 0.14. OAW 2.05, CRW 2.89, OAW/CRW = 0.71. CRW/carapace width = 0.64. MOA 0.80 long, front width 0.93, back width 0.96. Clypeus height 0.33, 0.89 times of AME diameter. Chelicerae with three promarginal teeth, five or six retromarginal teeth. Labium 1.04 long, 0.89 wide. Sternum 2.72 long, 2.38 wide. Measurements of legs: I 17.12 (4.88 + 2.16 + 4.15 + 3.81 + 2.12), II 15.85 (4.49 + 2.02 + 3.83 + 3.44 + 2.07), III 13.78 (3.94 + 1.89 + 3.03 + 3.16 + 1.76), IV 17.77 (4.80 + 2.02 + 4.12 + 4.93 + 1.90). Leg formula: 4123. Leg spination: femora I–II pl 1 do 2, III–IV pl 1 do 3 rl 1; tibiae I plv 3–4 rlv 4, II plv 3 rlv 3, III pl 2 rl 2 plv 2 rlv 2, IV pl 2 rl 2 plv 2 rlv 1; metatarsi I–II plv 2 rlv 2, III–IV plv 2 rlv 2 vt 3.

Palp as illustrated ( Figs 4 D–F, 5E–G). Tibia with ventral surface flat and slanting, not forming hump; RTA long, almost straight, only slightly curved at end. Tegulum extremely convex on retrolateral side; sperm duct visible for most its length, hidden near base of embolus. Embolus thick, S-shaped in ventral view, with ridge-like projection in middle of retrolateral side.

Female unknown.

Distribution. China (Yunnan) ( Fig. 12 ).

Figures

FIGURE 4. Male palp of Allomedmassa bifurca sp. nov. (A–C) and Allomedmassa crassa sp. nov. (D–F): A, D. prolateral view; B, E. ventral view; C, F. retrolateral view. Abbreviations: E—embolus; PTT—prolateral tibial tubercle; RTAretrolateral tibial apophysis. Scale bars: 1 mm (A–F).

FIGURE 12. Distribution of species mentioned in this paper.