Sesieutes longyangensis, Zhao & Peng, 2013

Zhao & Peng, 2013, Three new species of spiders of the family Liocranidae (Arachnida: Araneae) from China, Oriental Insects 47 (2), pp. 176-183: 180-182

publication ID 10.1080/00305316.2013.811021

persistent identifier

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scientific name

Sesieutes longyangensis

sp. nov.

3. Sesieutes longyangensis  sp. nov. ( Figures 3View Figure 3. S, 6View Figure 6. S)


Male carapace dark brown, without pattern or hair, its entire surface covered with fine tubercles. Anterior eye row slightly recurved, posterior eye row straight, slightly wider. Fovea indistinct. Sternum reddish brown, without pattern. Chelicerae 0.75 long, coloured as sternum, with lateral condyle, two promarginal and two retromarginal teeth. Labium as long as wide. Legs with femur coloured as carapace, and other segments pale; tibiae I and II yellowish distally, with seven and six pairs of long, ventral spines, respectively, with longest spine 0.72 long; metatarsi I and II with four pairs of long ventral spines, longest spine 0.57 long; femur I with two, strong, retrolateral spines. Opisthosoma elongate oval, with black hair. Dorsum coloured as carapace, with two pairs of muscular impressions, and two pale, transverse arc-shaped bands located at anterior and posterior one-third, respectively, its posterior end with a short, conical, white apophysis ( Figure 3View Figure 3. S (a)). Venter reddish brown, and its median area with an anchor-shaped, white pattern. Spinnerets cylindrical, yellowish brown, with anterior ones as long as posterior.

Palpal organ with tibia as long as wide (0.35), with three apophyses, of which two are ventral ( Figures 3View Figure 3. S (b),(d), 6 (a),(c)) and one dorsal ( Figures 3View Figure 3. S (c), 6 (b)). Cymbium 1.10 long, 0.52 wide, its terminal portion with scopula ( Figures 3View Figure 3. S (c),(d)). Genital bulb pear shaped, with a white, spherical, membranous structure close to the base of conductor ( Figures 3View Figure 3. S (c),6(b)), subtegulum visible in prolateral view ( Figures 3View Figure 3. S (c), 6 (b)), embolus clearly visible in ventral and prolateral views ( Figures 3View Figure 3. S (b),(c), 6 (a),(b)), conductor short, slightly bent, with distinct incision in prolateral view ( Figures 3View Figure 3. S (c), 6 (b)). Sperm-duct visible in retrolateral view ( Figures 3View Figure 3. S (b),(d), 6 (a),(c)).

Measurements. Male total length 5.70. Carapace 2.75 long, 2.15 wide. Clypeus height 0.15. Opisthosoma 2.80 long, 1.67 wide. AME 0.12, ALE 0.11, PME 0.10, PLE 0.11, AME – AME 0.07, AME – ALE 0.06, AME – PME 0.08, PME – PME 0.12, PME – PLE 0.13, ALE – PLE 0.10. Leg I 8.04 (2.30, 2.99, 1.75, 1.00), II 7.15 (2.10, 2.60, 1.50, 0.95), III 6.11 (1.72, 2.04, 1.45, 0.90), IV 8.57 (2.30, 2.75, 2.35, 1.17), formula: IV, I, II, III.


m, China: Yunnan Province, Longyang County, Bawan Township, Ganlin He at Baihua Village , 24.84100 ° N, 98.89140 ° E, 700m,, Coll. Heng-mei Yan and Ke-ji Guo, collected by beating vegetation ( GKJ0 35 – 1, HNU)GoogleMaps  .


The specific name is derived from the type locality.


This new species is similar to S. thakek  ( Jager 2007: Figures 73– 75) but distinct in its (1) embolus clearly visible in both ventral and prolateral views ( Figures 3View Figure 3. S (b),(c), 6 (a),(b)) (vs. invisible) and (2) conductor much longer and with distinct incision in prolateral view ( Figures 3View Figure 3. S (c), 6 (b)) (vs. absent).