Marengo ganae, Wang & Li, 2022

Wang, Cheng & Li, Shuqiang, 2022, A new genus and nine species of jumping spiders from Hainan Island, China (Araneae, Salticidae), ZooKeys 1118, pp. 39-72 : 39

Marengo ganae sp. nov.

Figs 6 , 7

Type material.

Holotype ♂ (TRU-JS 0630), China: Hainan: Ledong County, Jianfeng Village, Jianfengling National Nature Reserve, Tianchi (18°44.90'N, 108°52.01'E, ca. 790 m), 12.viii.2020, X.Q. Mi et al. leg. Paratypes 1♂2♀ (TRU-JS 0631-0633), same data as holotype; 1♀ (IZCAS-Ar43183), Lingshui County, Diaoluoshan National Nature Reserve (18°43.44'N, 109°52.60'E, ca. 490 m), 10.viii.2010, G. Zheng leg.; 1♂1♀ (IZCAS-Ar43184-43185), Diaoluoshan National Nature Reserve, Luchang (18°43.39'N, 109°51.07'E, ca. 940 m), 10.viii.2010, G. Tang leg.

Etymology.

The specific name is a patronym of Mrs. Jiahui Gan, one of the collectors of the type specimens; noun (name) in genitive case.

Diagnosis.

Marengo ganae sp. nov. resembles M. tangi Wang & Li, 2021 known from Yunnan of China in having a similar habitus and copulatory organs but it can be easily distinguished by the following characters: (1) the process of the embolic disc is lamellar (Fig. 6B, D ), whereas it is almost hook-shaped in M. tangi ( Wang and Li 2021: fig. 6B, D); (2) the RTA is slightly longer than the tibia (Fig. 6B ), whereas it is ~ 1/2 the tibial length in M. tangi ( Wang and Li 2021: fig. 6B); (3) the epigynal stiffener is ~ 4 × wider than the copulatory duct (Fig. 7B, C ), whereas it is ~ 2 × wider than copulatory duct in M. tangi ( Wang and Li 2021: fig. 7B). The species is also similar to that of M. striatipes Simon, 1900 known from Sri Lanka, but it can be easily distinguished by elongated atria having U-shaped posterior margins (Fig. 7A ), whereas oval atria with C-shaped posterior margins in M. striatipes ( Benjamin 2004: fig. 67B).

Description.

Male (Figs 6 , 7D, E, G, H ). Total length 2.57. Carapace 1.19 long, 0.82 wide. Abdomen 1.35 long, 0.72 wide. Eye sizes and inter-distances: AME 0.28, ALE 0.10, PLE 0.12, AERW 0.71, PERW 0.74, EFL 0.53. Leg measurements: I 2.92 (0.83, 0.43, 0.78, 0.60, 0.28), II 1.85 (0.55, 0.28, 0.43, 0.35, 0.24), III 1.63 (0.48, 0.23, 0.33, 0.35, 0.24), IV 2.16 (0.65, 0.30, 0.53, 0.43, 0.25). Carapace red-brown to dark brown, with pair of white spots of scales behind PLEs, covered with small papillae and brown setae. Chelicerae dark yellow, with two promarginal and three retromarginal teeth. Endites longer than wide. Labium colored as endites. Sternum almost oval. Legs I with enlarged tibiae with dense, ventral, leaf-like scales, and three pairs of ventral macrosetae; other legs pale to brown, with prolateral stripes on femora, patella, and tibiae III, IV. Abdomen elongate-oval, slightly constricted at anterior 1/4, dorsum red-brown to dark brown, anteriorly with a transverse yellow band bearing pair of white spots of scales at lateral margins, covered entirely by large scutum; venter paler than dorsum. Palp (Fig. 6A-D ): tibia wider than long; RTA straight, slender, almost 1.5 × longer than tibia, blunt apically; bulb swollen, divided by cleft; embolus coiled almost twice; process of embolic disc lamellar, wrinkled.

Female (Fig. 7A-C, F ). Total length 2.65. Carapace 1.17 long, 0.79 wide. Abdomen 1.40 long, 0.75 wide. Eye sizes and inter-distances: AME 0.28, ALE 0.10, PLE 0.11, AERW 0.70, PERW 0.73, EFL 0.53. Leg measurements: I 2.17 (0.63, 0.33, 0.55, 0.43, 0.23), II 1.58 (0.48, 0.25, 0.33, 0.30, 0.22), III 1.48 (0.45, 0.23, 0.30, 0.28, 0.22), IV 2.12 (0.66, 0.28, 0.50, 0.43, 0.25). Habitus (Fig. 7F ) similar to that of male except paler and with unmodified tibiae I lacking ventral, leaf-like scales. Epigyne (Fig. 7A-C ): with pair of anterior hood-shaped structures, and pair of stiffeners touching copulatory ducts; atria elongate-oval, separated by narrow median septum; copulatory openings beneath the posterior margins of atria; copulatory ducts curved, twisted into tortuous coils; spermathecae slightly broadened and curved medially; fertilization ducts lamellar, broad, extending anterolaterally.

Distribution.

Only known from the type locality on Hainan Island, China.

Figures

Figure 6. Male palp of Marengo ganae sp. nov., holotype A prolateral B retrolateral, C ventral D bulb, retrolateral. Scale bars: 0.1 mm. Abbreviations: E - embolus; EC - embolic coil; PED - process of embolic disc; RTA - retrolateral tibial apophysis; SD - sperm duct.

Figure 7. Marengo ganae sp. nov., male holotype and female paratype A epigyne, ventral B, C vulva, dorsal D holotype habitus, dorsal E ditto, lateral F female paratype habitus, dorsal G holotype carapace, frontal H holotype leg I, prolateral. Scale bars: 0.1 mm (A-C); 0.2 mm (G, H); 0.5 mm (D-F). Abbreviations: AR - atrial ridge; CD - copulatory duct; CO - copulatory opening; FD - fertilization duct; MS - median septum; S - spermatheca; St - stiffener.