Chrysilla yarlungzangbo, Yang & Zhang, 2024

Yang, Zhiyong & Zhang, Junxia, 2024, On eight species of Chrysillini from Xizang, China (Araneae: Salticidae: Salticinae), Zootaxa 5447 (2), pp. 151-187 : 152-155

Chrysilla yarlungzangbo sp. nov. (ǎm丽ḋø)

Figs 1–3, 14–27

Type material. Holotype: ♂ (MHBU-ARA-00026579), CHINA: Xizang Autonomous Region, Nyingchi City (ö ĭṪ), Medog County (墨º县), Mirage Scenic Area (ḂṪãēḁ区), 29.3439°N, 95.3443°E, 1264 m a.s.l., 14 July 2023, leg. Y. Hou, Z. Yang, Y. Ni & Y. Badan.

Etymology. The specific epithet refers to the Yarlung Zangbo Jiang (ǎẽäħȗ); noun in apposition. The type locality is situated in Medog County within the Yarlung Zangbo Grand Canyon. Medog is referred as the "Secret Land of Lotus Flowers" in the Zang language, and is renowned for its rich biodiversity.

Diagnosis. The new species resembles Chrysilla acerosa Wang & Zhang, 2012 in the elongated and slender embolus (see Wang & Zhang 2012: 66, figs 4, 5, 13, 14; Figs 22–27), but differs by the presence of a lamellar tegular process (LP) at the base of the embolus of the male palp ( Figs 23, 26; vs. LP absent in C. acerosa ), and the long RTA ( Figs 23, 24, 26, 27; vs. RTA in C. acerosa wide with a sharp ventral tip).

Description. Male. Habitus as in Figs 14–19. Measurements of holotype: carapace 2.23 long, 1.71 wide, abdomen 4.15 long, 1.06 wide; eye measurements: AME 0.52, ALE 0.29, PME 0.13, PLE 0.27; leg measurements: Ⅰ 5.79 (1.74, 0.69, 1.59, 1.05, 0.72), II 4.51 (1.42, 0.65, 1.08, 0.80, 0.56), III 5.10 (1.56, 0.54, 1.25, 1.15, 0.60), IV 6.07 (1.77, 0.58, 1.61, 1.47, 0.64); leg formula 4132. Carapace, abdomen and leg I covered with various iridescent scales, virtually transparent scales on other appendages ( Figs 14–19). Chelicerae brown, with two promarginal and one retromarginal teeth ( Fig. 21). Abdomen slim ( Figs 14–19).

Palp ( Figs 22–27): embolus elongated, base with lamellar tegular process ( Figs 23, 26); cymbium longer than wide ( Figs 22–27); RTA dagger-like in retrolateral view ( Figs 24, 27).

Female. Unknown.

Natural history. Foliage-dweller ( Figs 2, 3).

Distribution. China (Xizang) ( Fig. 1).