Spinirta aviforma Jin & Zhang, 2020

Wang, Lu-Yu, Irfan, Muhammad, Lu, Qian-Le, Zhang, Feng & Zhang, Zhi-Sheng, 2024, Six species of the spider genus Spinirta Jin & Zhang, 2020 from southern China (Araneae: Corinnidae), European Journal of Taxonomy 917 (1), pp. 74-93 : 75-78

Spinirta aviforma Jin & Zhang, 2020

Figs 1A–B , 2–3 , 14

Spinirta aviforma Jin & Zhang, 2020: 317 , figs 3e, 16a–i, 17a–d (♂).

Chinese name

¼刺Żü

Differential diagnosis

Female of Spinirta aviforma Jin & Zhang, 2020 resembles S. forcipata Jin & Zhang, 2020 in having the similar kidney-shaped copulatory openings ( Figs 2A , 3C ; Jin & Zhang 2020: figs 9g, 10e) but can be distinguished by the posterior margin of epigynal plate relatively narrow and forming an edge in S. aviforma ( Figs 2A , 3C ), vs posterior margin relatively round in S. forcipata ( Jin & Zhang 2020: figs 9g, 10e); spermathecae separated by a distance half of their diameter in S. aviforma ( Figs 2A , 3C ), vs separated by distance more than spermatheca’s diameter in S. forcipata ( Jin & Zhang 2020: figs 9g, 10e).

Material examined

Holotype

CHINA • ♂; Chongqing City, Beibei District, Jinyun Mountain Natural Reserve , Banzigou ; 29°47′13″ N, 106°20′00″ E; alt. 518 m; 5 Oct. 2010; H.J. Liu leg.; pitfall traps; MHBU.

Other material examined

CHINA • 2 ♂♂, 2 ♀♀; Chongqing City, Beibei District, Jinyun Mountain Natural Reserve ; 29°49′27″ N, 106°23′46″ E; alt. 613 m; 1 Oct. 2022; Q.L. Lu leg.; SWU-COSA-01 to 04 .

Description

Male (SWU-COSA-01, Figs 1A , 3A ) MEASUREMENTS. Total length 10.73. Prosoma 5.41 long, 4.20 wide; opisthosoma 5.11 long, 3.45 wide.

Eye sizes and interdistances: AME 0.38, ALE 0.30, PME 0.32, PLE 0.32; AME–AME 0.17, AME– ALE 0.11, PME–PME 0.28, PME–PLE 0.37, ALE–PLE 0.19. MOA 0.91 long, anterior width 0.91, posterior width 0.93. Clypeus height 0.30.

CHELICERAE. With three promarginal and four retromarginal teeth.

LEG MEASUREMENTS. I = 14.21 (3.90, 5.15, 3.19, 1.97); II = 13.43 (3.78, 4.69, 3.11, 1.85); III = 11.56 (3.25, 4.05, 2.69, 1.57); IV = 14.24 (4.27, 5.35, 4.44, 1.80). Leg formula: 4123.

PALP ( Fig. 3E–G ). For description see Jin & Zhang (2020).

Female (SWU-COSA-02, Figs 1B , 3B )

MEASUREMENTS. Total length 12.30. Prosoma 5.74 long, 4.55 wide; opisthosoma 6.52 long, 4.04 wide. Eye sizes and interdistances: AME 0.37, ALE 0.32, PME 0.32, PLE, 0.34; AME–AME 0.24, AME– ALE 0.12, PME–PME 0.31, PME–PLE 0.38, ALE–PLE 0.21. MOA 0.95 long, anterior width 0.91, posterior width 0.95. Clypeus height 0.32.

LEG MEASUREMENTS. I = 13.96 (4.02, 5.37, 2.84, 1.73); II = 13.22 (3.94, 4.41, 3.11, 1.76); III = 12.57 (3.50, 4.48, 2.98, 1.61); IV = 16.73 (4.25, 5.89, 4.75, 1.84). Leg formula: 4123.

EPIGYNE ( Figs 2A , 3C ). Copulatory openings kidney-shaped, almost parallel to each other.

VULVA ( Figs 2A , 3D ). Copulatory ducts thick, pear-shaped, extending poteriorly, anteriorly with small membranous part; accessory glands small, spherical; spermathecae separated by less than the spermathecae diameter; fertilization ducts large, present above spermathecae.

Distribution

China (Chongqing) ( Fig. 14 ).

Figures

Fig. 1.Photos of living specimens of Spinirta Jin & Zhang, 2020.A–B. S. aviformaJin & Zhang, 2020 (A, male; B, female). C–D. S. liuae Wang, Lu & Z.S. Zhang sp. nov. (C, male; D, female). E–F. S. quadrata Jin & Zhang, 2020 (E, male; F, female). (A–C, E–F photo by Qian-Le Lu, D photo by Jia Liu).

Fig. 2. Spinirta aviforma Jin & Zhang, 2020, ♀ (SWU-COSA-02). A. Epigyne, ventral view. B. Vulva, dorsal view. Abbreviations: AG = accessory glands; CD = copulatory ducts; CO = copulatory openings; FD = fertilization ducts; S = spermathecae.

Fig. 3. Spinirta aviforma Jin & Zhang, 2020. A, E–G. ♂ (SWU-COSA-01). B–D. ♀ (SWU-COSA-02). A. Male habitus, dorsal view. B. Female habitus, dorsal view. C. Epigyne, ventral view. D. Vulva, dorsal view. E. Left male palp, prolateral view. F. Same, ventral view. G. Same, retrolateral view.

Fig. 14. Distribution records of six species of Spinirta Jin & Zhang, 2020 in China.