Icius han, 1876

Yang, Zhiyong & Zhang, Junxia, 2024, On eight species of Chrysillini from Xizang, China (Araneae: Salticidae: Salticinae), Zootaxa 5447 (2), pp. 151-187 : 161-164

Icius han sp. nov. (Ṟ伊e)

Figs 54–67

Type material. Holotype: ♂ (MHBU-ARA-00025147), CHINA: Xizang Autonomous Region, Qamdo City (ª DṪ), Markam County (Ēå县), 29.7074°N, 98.4924°E, 4068 m a.s.l., 26 May 2022, leg. B. Liu & L. Wang. Paratypes: 1♂ 1♀ (MHBU-ARA-00026977, MHBU-ARA-00026978), same data as the holotype .

Etymology. The specific epithet "han" is from the Chinese pinyin for "cold", reflecting the high-altitude and low-temperature habitat where the new species was discovered; noun in apposition.

Diagnosis. The new species resembles Icius zang and I. kulakangri sp. nov. in the genitalic structures (see Wang et al. 2024: 156, 157, figs 9A–C, 10A–B; Figs 107–115 ). It can be distinguished from I. zang by the right-angled retrolateral constriction between the posterior lobe of tegulum (PL) and tegulum ( Figs 60 , 64 ; vs. the retrolateral constriction between PL and tegulum is not right-angled in I. zang ); the longer distance between copulatory openings and longer copulatory ducts ( Figs 63 , 67 ; vs. the distance between copulatory openings is shorter and the copulatory ducts are shorter in I. zang ). It differs from I. kulakangri sp. nov. in the straight embolus ( Figs 60 , 64 ; vs. the embolus is slightly bent in I. kulakangri sp. nov., Figs 110 , 113 ), the right-angled retrolateral constriction between PL and tegulum ( Figs 60 , 64 ; vs. the retrolateral constriction between PL and tegulum is not right-angled in I. kulakangri sp. nov., Figs 110 , 113 ), the wider lamellar tegular process (LP) ( Figs 60 , 64 ; vs. LP is narrower in I. kulakangri sp. nov., Figs 110 , 113 ); the epigynum with larger copulatory openings ( Figs 62 , 66 ; vs. the copulatory openings are smaller in I. kulakangri sp. nov., Figs 111 , 114 ).

Description. Male. Habitus as in Fig. 54 . Measurements of holotype: carapace 1.91 long, 1.34 wide, abdomen 1.92 long, 1.32 wide; eye measurements: AME 0.32, ALE 0.20, PME 0.05, PLE 0.14; leg measurements: Ⅰ 5.60 (1.63, 0.99, 1.48, 0.92, 0.58), II 3.42 (1.01, 0.57, 0.72, 0.62, 0.50), III 3.39 (1.01, 0.49, 0.67, 0.65, 0.57), IV 4.21 (1.29, 0.57, 0.93, 0.83, 0.59); leg formula 1423. Carapace brown with white lateral margins and a white stripe in middle, eye field black, with sparse yellow scales ( Fig. 54 ). Chelicerae brown, with two promarginal and one retromarginal teeth ( Fig. 56 ). Abdomen dark brown with two white stripes ( Fig. 54 ). Femur to tarsus of legs dark to brown ( Fig. 54 ).

Palp (59–61, 64, 65): embolus medium length and thin; tegulum rough, with a constriction near the posterior lobe of tegulum; tegular bump not prominent in ventral view; RTA dagger-like, palp with white scales on dorsal side ( Fig. 58 ).

Female. Habitus as in Fig. 55 . Measurements of paratype (MHBU-ARA-00026978): carapace 1.96 long, 1.28 wide, abdomen 2.21 long, 1.31 wide; eye measurements: AME 0.36, ALE 0.19, PME 0.05, PLE 0.15; leg measurements: Ⅰ 2.94 (0.95, 0.59, 0.58, 0.42, 0.40), II 2.74 (0.84, 0.48, 0.57, 0.41, 0.44), III 3.04 (0.98, 0.47, 0.55, 0.51, 0.53), IV 3.74 (1.13, 0.53, 0.78, 0.67, 0.63); leg formula 4312. Carapace brown, with yellow and white scales ( Fig. 55 ). Abdomen dark brown with a middle foliage-like yellowish marking ( Fig. 55 ). Legs brown ( Fig. 55 ).

Epigynum ( Figs 62, 63 , 66, 67 ): copulatory openings apart from each other, located anterior to spermathecae, with two pockets close to genital groove. Vulva ( Figs 63 , 67 ): copulatory ducts with two bulges close to spermathecae, spermathecae small and oval.

Natural history. Rock dwellers.

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

Figures

FIGURE 1. Distributional records of Chrysilla yarlungzangbo sp. nov., Icius faker sp. nov., I. han sp. nov., I. kui sp. nov., I. kulakangri sp. nov., I. zhengi sp. nov., Nandicius gyirongensis (Hu, 2001) comb. nov., and Siler niser Caleb, Parag & Datta-Roy, 2023.

FIGURES 54–58. Icius han sp. nov., male holotype (54, 56, 58) and female paratype (55, 57) from Markam County. 54, 55. Habitus, dorsal views; 56. Chelicerae, back view; 57, 58. Prosomas.

FIGURES 59–63. Icius han sp. nov., male left palp (59–61), epigynum (62) and vulva (63), in ventral (60, 62), prolateral (59), retrolateral (61) and dorsal (63) views.

FIGURES 64–67. Icius han sp. nov., male left palp (64), RTA (65), epigynum (66) and vulva (67), in ventral (64, 66), retrolateral (65) and dorsal (67) views.

FIGURES 107–112. Icius kulakangri sp. nov., male left palp (107–110), epigynum (111) and vulva (112), in ventral (110, 111), prolateral (107), retrolateral (109) and dorsal (108, 112) views.

FIGURES 113–115. Icius kulakangri sp. nov., male palp (113), epigynum (114) and vulva (115), in ventral (113, 114) and dorsal (115) views.