Sinopotamon fukienense Dai & Chen, 1979

Wang, Ruxiao, Pan, Da, Chen, Hui, Zhu, Binqing & Sun, Hongying, 2022, Revision of two species of Sinopotamon Bott, 1967 (Crustacea, Brachyura, Potamidae) endemic to China: a new combination and a new synonym, ZooKeys 1112, pp. 179-197 : 179

publication ID

https://dx.doi.org/10.3897/zookeys.1112.85278

publication LSID

lsid:zoobank.org:pub:2308C47E-483A-460A-B156-1A4D8DE50C28

persistent identifier

https://treatment.plazi.org/id/3FFBDEF4-9D18-5559-B97E-C658B048620E

treatment provided by

ZooKeys by Pensoft

scientific name

Sinopotamon fukienense Dai & Chen, 1979
status

 

Sinopotamon fukienense Dai & Chen, 1979

Figs 2 View Figure 2 , 3 View Figure 3

Sinopotamon fukienense Dai & Chen, 1979: 247, fig. 2(1)-(3); Dai 1999: 259, pl. 17 (7), fig. 136.

Sinopotamon wuyiensis Li, Lin, Cheng & Tang, 1985: 144, figs 1-6 [synonymy].

Material examined.

2 males, 23.2 × 29.0 mm, NNU11B-211121SF1; 22.0 × 27.6 mm, NNU 11B-211121SF2, Guadun , Wuyishan National Park, Fujian, coll. Caixin Liu, Kangqin Zhang, Ruxiao Wang & Hongying Sun, 21 November 2021 . 3 female, 17.5 × 22.3 mm, NNU 11B-211121SF3; 19.5 × 25.4 mm, NNU 11B-211121SF4; 20.5 × 26.1 mm, NNU 11B-211121SF5, same data as above . 1 male, 22.5 × 28.1 mm, NNU 11B-211217SF6, Guadun , Wuyishan National Park, Fujian, coll. Hui Chen, Yunlong Sun, Ruxiao Wang & Hongying Sun, 17 December 2021 . 2 males, 17.9 × 22.2 mm, NNU 11B-211217SF7; 17.6 × 22.3 mm, NNU 11B-211217SF8, Tongmuguan, Wuyishan National Park , Fujian, same data as above . 1 female, 16.8 × 21.0 mm, NNU 11B-211217SF9, same data as above . 4 females, 17.9 × 23.7 mm, NNU 11B-211121SF10, Dazhulan , Wuyishan National Park, Fujian, coll. Caixin Liu, Kangqin Zhang, Ruxiao Wang & Hongying Sun, 21 November 2021 . 3 females, 22.3 × 28.0 mm, NNU 11B-211215SF11; 17.0 × 21.2 mm, NNU 11B-211215SF12; 26.3 × 33.4 mm, NNU 11B-211215SF13, same data as above, 15 December 2021 . 2 males, 22.5 × 29.0 mm, NNU 11B-211219SF14; 21.3 × 27.2 mm, NNU 11B-211219SF15, Longdu , Wuyishan National Park, Fujian, coll. Hui Chen, Yunlong Sun, Ruxiao Wang & Hongying Sun, 19 December 2021 . 1 female, 21.8 × 27.7 mm, NNU 11B-211219SF16, same data as above . 1 male, 19.6 × 24.9 mm, NNU 11B-211218SF17, Qiaoxia , Wuyishan National Park, Fujian, coll. Hui Chen, Yunlong Sun, Ruxiao Wang & Hongying Sun, 18 December 2021 . 1 female, 17.9 × 22.8 mm, NNU 11B-211218SF18, same data as above . 1 female, 35.5 × 43.4 mm, NNU 11B-211218SF19, Jiangdun , Wuyishan National Park, Fujian, same data as above .

Distribution and habitat.

Jiangxi Province, and Minjiang basin in Fujian Province. The crabs were found under rocks in mountain streams.

Remarks.

Sinopotamon wuyiensis was considered a new species based on its distinct morphological characters in both male and female specimens, especially in the male specimen having a pair of vulvae on sternite 6, which is not seen in any known species of Sinopotamon . Unfortunately, the type material of S. wuyiensis , which was originally deposited in Fujian Research Institute of Parasite Disease, Fuzhou, Fujian Province, is now lost (Youzhu Cheng, pers. comm.). Therefore, to investigate the status and validity of S. wuyiensis , we conducted comprehensive collections in Tongmu Village but found no record of S. wuyiensis in the area. Instead, we collected 21 new specimens from 14 localities within the area (Fig. 1 View Figure 1 ), all of which were identified as S. fukienense by morphological comparison (Figs 2 View Figure 2 , 3 View Figure 3 ). According to the original description of S. wuyiensis , apart from the unique male sternite 6, S. wuyiensis is identical with S. fukienense in most characters, including outer margin of external orbital angle lined with 5-7 granules (Fig. 2A View Figure 2 ; cf. Dai and Chen 1979; Li et al. 1985; Dai 1999); anterolateral margin ~ 2 × as long as external orbital outer margin (Fig. 2A View Figure 2 ; cf. Dai and Chen 1979; Li et al. 1985; Dai 1999); G1 terminal segment tapering, tip directed outwards (Fig. 2D View Figure 2 ; cf. Dai and Chen 1979: fig. 2(1), (2); Li et al. 1985: figs 1, 2; Dai 1999: fig. 136(3), (4)), not reaching suture sternites 5/6 (Fig. 2D View Figure 2 ; cf. Dai and Chen 1979: fig. 2(1), (2); Li et al. 1985: figs 1, 2; Dai 1999: fig. 136(3), (4)), subterminal segment to terminal segment ratio ~ 2.5 (Fig. 2D View Figure 2 ; cf. Dai and Chen 1979; Li et al. 1985; Dai 1999); female pleon subovate, vulvae ovate (Fig. 3 View Figure 3 ; cf. Dai and Chen 1979; Li et al. 1985: figs 5, 6; Dai 1999: fig. 136(7), (8)). Therefore, it is most likely that the holotype of S. wuyiensis is a rare gynandromorphic specimen (Youzhu Cheng, pers. comm.), rather than a representative of a new species. Therefore, S. wuyiensis is herein synonymized with S. fukienense .

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

InfraOrder

Brachyura

Family

Potamidae

SubFamily

Potamiscinae

Genus

Sinopotamon

Loc

Sinopotamon fukienense Dai & Chen, 1979

Wang, Ruxiao, Pan, Da, Chen, Hui, Zhu, Binqing & Sun, Hongying 2022
2022
Loc

Sinopotamon wuyiensis

Y. S. Li, in Y. S. Li, J. N. Lin, Y. Z. Chen & J. H. Tang 1985
1985
Loc

Sinopotamon fukienense

Dai & Chen 1979
1979