Indomarengo yui, Wang & Li, 2020

Wang, Cheng & Li, Shuqiang, 2020, Seven new species of jumping spiders (Araneae, Salticidae) from Xishuangbanna, China, ZooKeys 968, pp. 43-69 : 43

Indomarengo yui sp. nov. Figs 5 , 6

Type material.

Holotype ♂ (IZCAS-Ar40606), China: Yunnan: Xishuangbanna, Mengla County, Menglun Town, Menglun Nature Reserve, garbage dump, secondary tropical rainforest (21°54.30'N, 101°16.78'E, ca 620 m), 26.04.2019, H. Yu et al. leg. Paratype 1♂ (IZCAS-Ar40607), same data as holotype.

Etymology.

The specific name is a patronym after Prof. Hao Yu (Guiyang, China), one of the collectors of the new species; noun (name) in genitive case.

Diagnosis.

Indomarengo yui sp. nov. resembles I. chavarapater Malamel, Prajapati, Sudhikumar & Sebastian, 2019 by the general shape of the palp but can be distinguished by the RTA, which is distally curved towards the bulb in retrolateral view vs almost straight and directed anteriorly in I. chavarapater ( Malamel et al. 2019: figs 11, 15); and by the tibia, which is wider than long vs almost as long as wide in I. chavarapater ( Malamel et al. 2019: figs 10, 11, 15, 16).

Description.

Male (Figs 5 , 6 ). Total length 3.12. Carapace 1.36 long, 0.85 wide. Abdomen 1.67 long, 0.76 wide. Clypeus 0.05 high. Eye sizes and inter-distances: AME 0.29, ALE 0.12, PLE 0.12, AERW 0.75, PERW 0.78, EFL 0.53. Legs: I 3.46 (0.93, 1.51, 0.80, 0.22), II 1.79 (0.54, 0.66, 0.37, 0.22), III 1.67 (0.49, 0.59, 0.37, 0.22), IV 2.09 (0.63, 0.78, 0.46, 0.22). Carapace flat, red-brown to dark brown, there are white setae behind the PLEs and posteriorly, with a distinct protuberance on the thoracic region. Clypeus dark. Fovea indistinct. Chelicerae red-brown, with three retromarginal teeth and two promarginal teeth. Endites and labium dark brown. Sternum red-brown, elongated and tapered posteriorly, covered with thin setae. Legs I enlarged, with inflated tibia bearing ventral leaf-shaped scales and five spines; other legs pale, with dark stripes laterally on femora and patellae. Abdomen elongated oval, dorsum brown to dark brown, constricted at first anterior third, with white setae at lateral margins; venter pale to brown.

Palp (Fig. 5A-D ): tibia wider than long, with a thin RTA approximately two times the tibial length, widened at the base and curved towards bulb terminally; bulb inflated, divided by a furrow; embolus short, coiled, forming two circles, and partly covered by a membranous structure.

Female. Unknown.

Distribution.

Known only from the type locality in Yunnan, China.

Comments.

The species has a distinct carapace protuberance, which is only known to occur in species of the genera Indomarengo Benjamin, 2004, Sadies Wanless, 1984, Leikung Benjamin, 2004, and Afromarengo Benjamin, 2004 of the Ballini . Based on similarities such as the short embolus with less than two spirals and lack of leaf-like carapace scales (more than two spirals in Leikung and Afromarengo species and leaf-like carapace scales present in Sadies species) in addition to closely resembling I. chavarapater Malamel, Prajapati, Sudhikumar & Sebastian, 2019 by the habitus and the shape of the male palp, we place the spider into this genus.

Figures

Figure 5. Male palp of the holotype of Indomarengo yui sp. nov. A prolateral B retrolateral C ventral D bulb, retrolateral. Scale bars: 0.1.

Figure 6. Indomarengo yui sp. nov., male holotype A habitus, dorsal B habitus, lateral C habitus, ventral D chelicerae, dorsal E left leg I, prolateral. Scale bars: 0.5 (A-C, E); 0.1 (D).