Alistra pikachu Lin & Li, 2021

Alistra pikachu Lin & Li View in CoL , sp. nov. ( Figs 20A–C View Figure 20 , 21A–B View Figure 21 )

Diagnosis. Males of A. pikachu Lin & Li , sp. nov. are similar to those of A. hippocampa Zhang, Li & Zheng, 2011 in having a slender embolus, short cymbial furrow, and an absence of the MA and C, but there are no patellar apophyses in A. pikachu Lin & Li , sp. nov. ( vs. present in A. hippocampa ), and the RTA is long and thin ( vs. short RTA in A. hippocampa ). Females of the new species are distinguished from other Alistra species by the folded CDs and oval S.

Description. Male ( holotype, IZCAS-Ar42416, Figs 20A–C View Figure 20 ). Total length 1.55. Prosoma 0.71 long, 0.63 wide; opisthosoma 0.92 long, 0.63 wide. Eye sizes and interdistances: AME 0.04, ALE 0.05, PME 0.03, PLE 0.04; AME–AME 0.03, AME–ALE 0.01, PME–PME 0.07, PME–PLE 0.05, ALE–PLE 0.01. Clypeus height 0.08. Leg measurements: Leg I 2.41 (0.71 + 0.81 + 0.48 + 0.41); leg II 2.34 (0.69 + 0.78 + 0.47 + 0.40); leg III 1.095 (0.55 + 0.64 + 0.40 + 0.34); leg IV 2.42 (0.67 + 0.78 + 0.54 + 0.41). Leg formula 4123.

Palp ( Figs 20A–C View Figure 20 ), patella without an apophysis. Palpal tibia longer than patella, RTA sickle shaped. E originating prolatero-basally, curving clockwise along the tegular margin, semicircular. C and MA absent. Cymbium with short and deep furrow, the length is one quarter of the cymbial length.

Female ( paratype, IZCAS-Ar42417, Figs 21A–B View Figure 21 ). Total length 1.84. Prosoma 0.71 long, 0.72 wide; opisthosoma 1.12 long, 0.79 wide. Eye sizes and interdistances: AME 0.04, ALE 0.04, PME 0.06, PLE 0.07; AME–AME 0.05, AME–ALE 0.02, PME–PME 0.09, PME–PLE 0.06, ALE–PLE 0.02. Clypeus height 0.09. Leg measurements: Leg I 2.84 (0.70 + 0.74 + 0.45 + 0.39); leg II 2.26 (0.69 + 0.74 + 0.43 + 0.40); leg III 2.08 (0.62 + 0.66 + 0.43 + 0.37); leg IV 2.61 (0.74 + 0.87 + 0.57 + 0.41). Leg formula 4123. Opisthosoma yellow-brown.

Epigyne ( Figs 21A–B View Figure 21 ) small and simple. CDs folded. S oval.

Material examined. Holotype ♂, China: Guangdong, Qingyuan, Yangshan County, Gaofengdaoban , Jile Cave ( 24.4912°N, 112.6956°E; elev. ca. 280 m), 5 January 2019, leg. Zhigang Chen and Zhe Zhao (IZCAS-Ar42416) GoogleMaps . Paratypes. 3♂ 3♀ (IZCAS-Ar42417–Ar42422), same data as holotype GoogleMaps .

Distribution. Known only from the type locality.

Etymology. The species is named after Pikachu, a fictional character from Pokémon Yellow, as the habitus color of this new species is yellow; noun (name) in apposition.

Variation. Male ( holotype and paratypes; n = 4) total length 1.45–1.62. Female ( paratypes; n = 3) total length 1.63–1.84.