Lutosus projectis, Irfan & Zhang & Peng, 2022

Irfan, Muhammad, Zhang, Zhi-Sheng & Peng, Xian-Jin, 2022, Survey of Linyphiidae (Arachnida: Araneae) spiders from Yunnan, China, Megataxa 8 (1), pp. 1-292 : 158-162

Lutosus projectis sp. nov. (ĒẌffikƦ)

Figures 181–183

Types. Holotype ♂, CHINA, Yunnan, Tengchong County, Mingguang Township, Zizhi Village , up slope, 25.80975°N, 98.62081°E, alt. 2880m, down slope, 25.79808°N, 98.62406°E, alt. 2756m, 19 May 2006, Chang-min Yin, Jia-fang Hu and Ming-wei Yang leg. ( YHY06 ) . Paratypes: 1♂, same data as holotype ( YHY06 ); 1♂, Longyang County, Bawan Township , Nankang Yakou , Understory of forest on E facing slope, 24.83104°N, 98.76864°E, alt. 2210m, 23 May 2005, Heng-mei Yan and Ke-ji Guo leg. ( GKJ016 ) .

Etymology. This epithet derives from the Latin adjective “ projectus ”, meaning “projection”, and referrs to the distal arm of the paracymbium with four projections in the male palp.

Diagnosis. See genus diagnosis ( Fig. 181 , 182 ).

Description. Male (holotype, Fig. 182C–E ): Total length: 1.68. Carapace 0.73 long, 0.59 wide; cephalic lobe 0.29 high, elevated abruptly, bearing PMEs, the pit and sulcus present beneath the cephalic lobe; clypeus and ocular quad, sparsely covered with microsetae, brown; fovea, cervical and radial grooves distinct. Clypeus 0.24 high. Sternum longer than wide, brown,, sparsely covered with microsetae. Labium wider than long. Maxillae long, distal end broad with scopulae. Chelicerae sclerotized, pale, with three promarginal and four retromarginal teeth. Eyes: AER recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances: AME 0.05, ALE 0.06, PME 0.05, PLE 0.05, AME–AME 0.01, PME–PME 0. 13, AME–ALE, 0.02, PME–PLE 0.06, AME–PME 0.15, ALE–ALE 0.25, PLE–PLE 0.26, ALE–PLE 0.01. Length of legs: I 2.30 (0.61, 0.74, 0.56, 0.39), II 2.51 (0.69, 0.80, 0.61, 0.41), III 1.89 (0.54, 0.56, 0.48, 0.31), IV 2.30 (0.65, 0.70, 0.59, 0.36). Leg formula II-I-IV-III. Tm I 0.28 and Tm IV 0.21. Patella I with a long thick spine. Tibial spines thick and long; tibial spine formula: 1-1-1-1. Abdomen 1.09 long, 0.69 wide, oval, pale, mid dorsally with a longitudinal greenish-grey band followed by two chevrons posteriorly, ventral side pale.

Palp ( Fig. 181A–D , 182A, B ): Patella as long as tibia, dorsally with a thick long spine; tibia with one reterolateral and one dorsal trichobothria, with sclerotized reterolateral, dorsal and prolateral apophyses; paracymbium sclerotized, distal arm with four projections; distal suprategular apophysis sclerotized, wider than long; tegulum with a small transparent protegulum. Embolic division: radix sclerotized, broad and round; embolic membrane arises from inner margin of radix; terminal apophysis sclerotized, longer than wide, with serrated tip; embolus arises from lateral margin of the radix, long and curved.

Female. Unknown.

Distribution. Known only from the type locality ( Fig. 183 ).

Genus Megalepthyphantes Wunderlich, 1994 (DfflƉ Ʀø)

Figures

FIGURE 181. Lutosus projectis sp. nov., male palp of holotype. A prolateral view B retrolateral view C ventral view D dorsal view.

FIGURE 182. Lutosus projectis sp. nov., male holotype. A Leg I patellar spine B patella and tibia of male palp, dorsal view C Habitus, dorsal view D Habitus, lateral view E Habitus, ventral view.

FIGURE 183. Distribution of Lutosus projectis sp. nov..