Oxytate palmata, Xu, Xiang, 2017

Xu, Xiang, 2017, Two new species of the genus Oxytate from China (Araneae: Thomisidae), Zootaxa 4320 (1), pp. 193-200 : 194-199

Oxytate palmata sp. nov.

Figs 3 ̄6

Material examined: Holotype: male, CHINA: Guangxi Province: Chongzuo City, Jiangzhou District , Zuozhou Town , Guanghe Village , Nongxue , 22.600°N, 107.405°E, 252 m, 5 September 2015 ( HNU).

Paratypes: 3 males and 8 females, CHINA: Guangxi Province: Chongzuo City, Jiangzhou District : 1 male, 1 female same data as holotype ( HNU) ; 1 male, Zuozhou Town, Guanghe Village, Nongtan , 22.568°N, 107.405°E, 296 m, 30 August 2015 ; 1 male and 1 female, Tuolu Town, Tuobai Village, Longquantun , Nongquan , 22.540°N, 107.454°E, 145 m, 10 September 2015 ; 1 female, Zuozhou Town, Guanghe Village, Pairu , 22.582°N, 107.428°E, 226 m, 3 September 2015 ; 1 female, Zuozhou Town, Guanghe Village, Hecuntun , Nongyao , 22°.605N, 107.428°E, 224 m, 9 September 2015 ; 1 female, Zuozhou Town, Guanghe village, Longmitun , Nongxing , 22.570°N, 107.438°E, 272 m, 7 September 2015 ; 3 females, Zuozhou Town, Guanghe village, Hecuntun, Nongteng , 22.585°N, 107.424°E, 235 m, 4 September 2015. All these specimens were collected by Bing Zhou, Wang Liu, Jihe Liu, Qu Cai, Xianfeng Huang and Da Li and they are deposited in Hunan Normal University ( HNU) .

Etymology: The specific name is derived from the Latin adjective “palmatus”, referring to the palmate tip in retrolateral tibial apophysis (RTA) of the male palp ( Figs 3B ̄D, 5).

Diagnosis: Males of the new species resemble Oxytate forcipatus Zhang & Yin, 1998 and O. placentiformis Wang et al., 2012 in having the small hook-shaped ventral tibial apophysis (VTA), but can be clearly distinguished by the palmate tip of retrolateral tibial apophysis (RTA) and the curved embolus (EM) ( Figs 3B ̄D, 5). Females can be distinguished from other members of this genus by the shape of the copulatory duct (CD) and the spermathecae (Spm).

Description. Male ( Figs 3 ̄6). Total length 4.27. Prosoma 1.49 long, 1.67 wide; opisthosoma 2.67 long, 0.74 wide. Eyes ( Fig. 3A ): circular, lateral eyes on tubercles; diameters: AME 0.04, ALE 0.09, PME 0.05, PLE 0.08; AME–AME 0.07, AME–ALE 0.13, PME–PME 0.07, PME–PLE 0.21. MOA, 0.15 length, wider in back than in front (0.16, 0.15). Carapace yellow brown ( Fig. 3A ), smooth, with inconspicuous cervical groove and fovea. Eye field ( Fig. 3A ), arc-shaped, without setae. Chelicerae yellowish brown, without tooth. Edites yellowish brown, smooth, longer than wide, with short, scattered setae. Labium yellowish brown, oval. Sternum yellowish white, shield-shaped, surface smooth, with few setae. Measurements of legs: I 7.96 (2.37, 0.76, 2.25, 1.74, 0.84); II 8.34 (2.55, 0.83, 2.32, 1.64, 1.00); III 3.95 (1.03, 0.37, 1.14, 0.84, 0.57); IV 3.66 (1.21, 0.32, 0.91, 0.70, 0.52). Leg formula: II, I, III, IV. Leg spination: I Fe 4223, Pa 2110, Ti 2446, Mt 0226; II Fe 3110, Pa 2100, Ti 2336, Mt 0226; III Fe 3100, Pa 2000, Ti 3210, Mt 1111; IV Fe 3100, Pa 2000, Ti 3110, Mt 0 111. Abdomen much longer than wide ( Fig. 3A ), dorsum yellow, with abundant silver spots in dorsal view, two groups of 2 inconspicuous patches and two longitudinal strips on posterior part and regular transverse rows of strong spines on posterior part. Spinnerets yellow-brown, stout, with abundant setae. Palp ( Figs 3B ̄D, 5). Retrolateral tibial apophysis (RTA) with a palmate tip and many regular, fine ridges. Ventral tibial apophysis (VTA), developed well, with a small hook-shaped tip. Embolus (EM), short and curved.

Female ( Figs 4 , 6 ). Total length 4.97, carapace length 1.65, carapace width 1.74, abdomen length 3.24, abdomen width 0.89. Eyes ( Fig. 4A ) diameters: AME 0.04, ALE 0.07, PME 0.04, PLE 0.05; AME–AME 0.10, AME–ALE 0.19, PME–PME 0.12, PME–PLE 0.29. MOA, 0.18 length, wider in back than in front (0.17, 0.15). Abdomen ( Fig. 4A ), dorsum silver, with one longitudinal median gray strip in anterior half. Measurements of legs: I 8.48 (2.61, 0.76, 2.50, 1.59, 1.02); II 8.27 (2.51, 0.73, 2.51, 1.58, 0.94); III 4.16 (1.03, 0.47, 1.18, 0.93, 0.55); IV 3.94 (1.32, 0.40, 0.95, 0.75, 0.52). Leg formula: I, II, III, IV. Leg spination: Pedipalp Fe 1100, Pa 2100, Ti 2110, Ta 2420; I Fe 4203, Pa 2000, Ti 2108, Mt 0 118, Ta 0600; II Fe 4200, Pa 2000, Ti 2108, Mt 0 118, Ta 0600; III Fe 2101, Pa 2000, Ti 2201, Mt 0220; IV Pa 2000, Ti 2000, Mt 6222, Ta 3000. Epigynum ( Figs 4C, D , 6 ). Epigynum, deeply divided by anterior hood; copulatory opening (CO), relatively narrow; copulatory duct (CD), anterior part slender, median part curved outward in dorsal view, posterior part leading forward into spermathecae (Spm); Spm, nearly round. Fertilization ducts (FD) short.

Distribution. Known only from Guangxi province, China.

Figures

FIGURES 3 A – D. Oxytate palmata sp. nov., male holotype. A Habitus, dorsal; B ̅ D Palp (B ventral, C prolateral-ventral, D retrolateral). Scale bars: A, 1 mm; B ̅ D, 0.2 mm.

FIGURES 4 A ‒ D. Oxytate palmata sp. nov., female paratype. A Habitus, dorsal; B Epigynum, ventral; C Vulva, dorsal. Scale bars: A, 1 mm; B, C, 0.2 mm.

FIGURES 6 A – B. Oxytate palmata sp. nov., female paratype. A Epigynum, ventral; B Vulva, dorsal. Abbreviations: CD, copulatory duct; CO, copulatory opening; FD, fertilization duct; Spm, spermatheca. Scale bars: A, B, 0.2 mm.