Fluctus bannaensis, Jin & Zhang, 2020

Jin, Chi & Zhang, Feng, 2020, Fluctus gen. nov., a new castianeirine genus from Yunnan, China (Araneae: Corinnidae), Zootaxa 4821 (1), pp. 161-172 : 163-164

publication ID	https://doi.org/ 10.11646/zootaxa.4821.1.9
publication LSID	lsid:zoobank.org:pub:31066E03-01F5-4BE9-97D1-B34F638FB9C2
DOI	https://doi.org/10.5281/zenodo.4398346
persistent identifier	https://treatment.plazi.org/id/1B105A0F-FF96-C306-FF5E-FC7A3953FCA7
treatment provided by	Plazi
scientific name	Fluctus bannaensis
status	sp. nov.

Treatment

Fluctus bannaensis View in CoL sp. nov. (DZAEdzdzH)

Figs 1A, B, D View FIGURE 1 , 2–4 View FIGURE 2 View FIGURE 3 View FIGURE 4

Type material. Holotype: ♂, CHINA: Yunnan Province, Jionghong City, Xishuangbanna Primeval Forest Park (22°01.657′N, 100°53.487′E), 832 m a.s.l., 17 October 2016, leg. Guiqiang Huang, Xiangbo Guo and Yanchao Wang. GoogleMaps Paratypes: 2♀, same data as holotype. All the type specimens were immature when they were collected and later raised to maturity. The maturity date was: 10 January 2017 for GoogleMaps ♂ (holotype); 3 March 2017 and 20 April 2017 for two ♀ (paratypes).

Etymology. The specific name is derived from the type locality; adjective.

Diagnosis. The new species resembles F. tengchongensis sp. nov., but can be distinguished from it by: 1) abdominal longitudinal wave-shaped patch is longer and more obvious than in F. tengchongensis sp. nov. ( Figs 2A, E View FIGURE 2 , 5A, E View FIGURE 5 ); 2) male dorsal scutum and ventral sclerite are separated ( Fig. 2B View FIGURE 2 ), whereas they are fused to wrap the entire abdomen in F. tengchongensis sp. nov. ( Fig. 5B View FIGURE 5 ); 3) the helix of the embolus is more stretched than in the latter ( Figs 3D View FIGURE 3 , 6D View FIGURE 6 ); 4) epigynal median plate is narrower than in the latter ( Figs 4D View FIGURE 4 , 7D View FIGURE 7 ); 5) ST1 close together and equal in size to ST2 ( Fig. 3F View FIGURE 3 ), whereas ST1 separated from each other and smaller than ST 2 in F. tengchongensis sp. nov. ( Fig. 6F View FIGURE 6 ); 6) fixed sclerite of vulva more like V-shaped and thicker than that of the latter ( Fig. 3F View FIGURE 3 ), whereas it is obviously Y-shaped and thinner in F. tengchongensis sp. nov. ( Fig. 6F View FIGURE 6 ).

Description. Male ( Figs 1A View FIGURE 1 , 2 View FIGURE 2 A–D, 3A–D, 4A–C). Holotype: body 7.76 long; carapace 3.39 long, 2.36 wide, width/length= 0.70; abdomen 4.37 long, 2.15 wide. Diameters of eyes: AME 0.15, ALE 0.12, PME 0.13, PLE 0.13. Eye interdistances: AME–AME 0.11, AME–ALE 0.03, ALE–ALE 0.41, PME–PME 0.17, PME–PLE 0.08, PLE–PLE 0.57, ALE–PLE 0.06. OAW 0.75, CRW 1.26, OAW/CRW= 0.60. CRW/carapace width= 0.53. MOA 0.40 long, front width 0.40, back width 0.45. Clypeus height 0.27, 1.80 times of AME diameter. Chelicerae with three promarginal and two retromarginal teeth. Labium 0.35 long, 0.48 wide. Sternum 1.57 long, 1.25 wide. Measurements of legs: leg I 9.07 (2.35 + 0.94 + 2.13 + 2.08 + 1.57), II 8.25 (2.18 + 0.78 + 2.02 + 1.94 + 1.33), III 8.16 (2.20 + 0.98 + 1.70 + 2.04 + 1.24), IV 11.16 (2.84 + 1.16 + 2.50 + 3.31 + 1.35). Leg spination: femora: I pl 1 do 2 dt 1, II pl 1 do 2 dt 2, III pl 1 rl 1 do 2 dt 3, IV pl 1 do 2 dt 3; tibiae: I plv 3 rlv 3, II plv 2 rlv 2, III–IV pl 2 rl 2 plv 2 rlv 2 vt 2; metatarsi: I–II plv 2 rlv 2, III–IV plv 2 rlv 2 vt 1 plt 1 rlt 1 dt 2 pld 2 rld 2. Palpal spination: femur: pl 1 do 2, patella: pl 1 do 2, tibia: pl 2 do 2, tarsus: pl 3 plv 1 rlv 1. Abdominal longitudinal wave-shaped patch long and obvious; dorsal scutum and ventral sclerite separated.

Palp ( Figs 3 View FIGURE 3 A–D, 4A–C): tibial ventral groove distinct, more towards prolateral face; retrobasal paracymbial spine short, pointed retrolaterally; sperm duct relatively thin; prolateral side of subtegulum undulating, with middle part membranous; embolus short, with tip pointed anteriorly.

Female ( Figs 1B, D View FIGURE 1 , 2 View FIGURE 2 E–H, 3E–F, 4D–E). Total length 8.37–8.77 (n=2). One paratype: body 8.37 long; carapace 3.89 long, 2.72 wide, width/length= 0.70; abdomen 4.48 long, 2.69 wide. Diameters of eyes: AME 0.16, ALE 0.14, PME 0.15, PLE 0.15. Eye interdistances: AME–AME 0.11, AME–ALE 0.02, ALE–ALE 0.47, PME–PME 0.20, PME–PLE 0.10, PLE–PLE 0.58, ALE–PLE 0.06. OAW 0.86, CRW 1.53, OAW/CRW= 0.56. CRW/carapace width= 0.56. MOA 0.40 long, front width 0.42, back width 0.49. Clypeus height 0.28, 1.75 times of AME diameter. Chelicerae with three promarginal and two retromarginal teeth. Labium longer than wide. Sternum 1.82 long, 1.51 wide. Measurements of legs: leg I 9.77 (2.68 + 1.04 + 2.36 + 2.13 + 1.56), II 9.33 (2.57 + 1.11 + 2.04 + 2.10 + 1.51), III 8.91 (2.46 + 1.07 + 1.83 + 2.18 + 1.37), IV 12.41 (3.17 + 1.11 + 2.80 + 3.62 + 1.71). Leg spination: femora: I pl 1 do 2 dt 1, II do 2 dt 2, III–IV pl 1 do 2 dt 3; tibiae: I plv 3 rlv 3, II plv 2 rlv 2, III–IV pl 2 rl 2 plv 2 rlv 2 vt 2; metatarsi: I–II plv 2 rlv 2, III–IV plv 2 rlv 2 vt 1 plt 1 rlt 1 dt 2 pld 2 rld 2. Palpal spination: femur: pl 1 do 2 mv 5, patella: pl 1 do 2, tibia: pl 2 do 2, tarsus: pl 1 plv 1 rlv 1 pld 1 rld 1. Abdominal wave-shaped patch long, for entire length of abdomen.

Epigyne ( Figs 3E View FIGURE 3 , 4D View FIGURE 4 ): median plate narrow, inconspicuous; epigynal depression longitudinal and slightly curved; copulatory openings with crescentic ridges directed postero-laterally. Vulva ( Figs 3F View FIGURE 3 , 4E View FIGURE 4 ): copulatory ducts short; ST1 and ST2 round, with almost same size, lying close together; fixed sclerite V-shaped.

Distribution. Known only from the type locality ( Fig. 8 View FIGURE 8 ).