Rhombuniopsis tauriformis Fulton, 1906

Xiang, Hong Quan, He, Yue Ming, Zhang, Le Jia, Gao, Han, Guo, Liang, Lu, Yi Zhi, Fan, Shu Yun & Chen, Hui, 2024, A revision of Rhombuniopsis Haas, 1920 (Unionida, Unionidae) endemic to the ancient lakes of Yunnan, China, with descriptions of two new species, Zootaxa 5481 (2), pp. 273-289 : 277-278

publication ID

https://doi.org/ 10.11646/zootaxa.5481.2.6

publication LSID

lsid:zoobank.org:pub:80194D39-74AD-4C40-AAAC-C2F52D4FF179

DOI

https://doi.org/10.5281/zenodo.12752893

persistent identifier

https://treatment.plazi.org/id/03F57E77-FF99-DE78-FF32-4F6F6E64F9F0

treatment provided by

Plazi

scientific name

Rhombuniopsis tauriformis Fulton, 1906
status

 

Rhombuniopsis tauriformis Fulton, 1906 View in CoL

Fig. 4 A–F View FIGURE 4

Unio (Cuneopsis) tauriformis Fulton (1906): 246 View in CoL , pl. 9, fig. 9 [‘ Yunnan fu’ = Kunming, Yunnan Province, China].

Cuneopsis tauriformis Simpson (1914): 948 View in CoL –949.

Rhombuniopsis tauriformis Haas (1920): 146 View in CoL –151; Haas (1924): 185; Thiele (1934): 779–1022; Haas (1969): 269–270; Du et al. (2011): 216; He & Zhuang (2013): 100, Figs 235–236; Zieritz, Bogan, Froufe et al. (2018): 29 –44; Graf & Cummings (2021): 15; Liu, Liu, Wu et al. (2022): 1–37.

Rhombuniopsis cuneopiformis Huang & Zhang (1990): 69 –75; Du et al. (2011): 216.

Material examined. Newly collected material. Adult shell: Lake Dianchi , Shangsuan Town (上ũDz), 24.695185°N, 102.689200°E, 2017.11. ( KIZ1904101 View Materials KIZ1904103 View Materials ), collected by Jiao Wei Ning and Hong Quan Xiang GoogleMaps ; Lake Dianchi , Xiaoqinghe Village (小DZāñ), 24.695185°N, 102.689200°E, 2019.6. ( KIZ1904104 View Materials KIZ1904105 View Materials ), collected by Liang Guo GoogleMaps ; Lake Dianchi , Haikou (DZ口), 24.78012°N, 102.62258°E, 2023.5. ( KIZ1904106 View Materials KIZ1904110 View Materials ), collected by Hong Quan Xiang GoogleMaps ; Lake Lulianghai , Zhongshu Town (中NJDz), Luliang County, 25.01131°N, 103.66032°E, 2023.9.1. ( KIZ1904111 View Materials KIZ1904113 View Materials ), collected by Hong Quan Xiang GoogleMaps .

Diagnosis. Shell ovate to triangulate ovate, dark brown to black; umbo near to the front, with wavy wrinkles.

Description. Shell ( Fig. 4 A–F View FIGURE 4 ). Length 20–55 mm. Shell small, thick, obliquely ovate, symmetrical or slightly asymmetrical, wedge-shaped, anterior margin truncate, posterior margin sharp or round; periostracum shining black, the umbo sculptured with wavy wrinkles, often eroded. Anterior adductor muscle scar oval, very deep; posterior adductor muscle scar round to oval, shallow. Left valve with two pseudocardinal teeth, anterior tooth rather thin, posterior tooth thick; anterior pseudocardinal tooth of the right valve well developed, spherical; lateral teeth long and thick; nacre white.

Comparison. This species can be differentiated from the most similar species R. songmeng sp. nov. by having a relatively prominent umbo and an obliquely ovoid shell.

Taxonomic remarks. Fulton (1906) described Unio (Cuneopsis) tauriformis based on shells collected from Kunming. According to the morphology of its shell, Haas (1920) assigned this species to Rhombuniopsis . Huang & Zhang (1990) described a new species, Rhombuniopsis cuneopiformis from shells collected at Lake Dianchi, but our morphological comparison confirms that it should be a synonym of R. tauriformis .

Habitat and distribution. Lives on muddy to sandy substrates, mostly found along the shores of lakes and where rivers enter the lakes at depths of 0–3 m. Known to occur in the Dianchi and Lulianghai lakes.

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Unionida

Family

Unionidae

SubFamily

Unioninae

Genus

Rhombuniopsis

Loc

Rhombuniopsis tauriformis Fulton, 1906

Xiang, Hong Quan, He, Yue Ming, Zhang, Le Jia, Gao, Han, Guo, Liang, Lu, Yi Zhi, Fan, Shu Yun & Chen, Hui 2024
2024
Loc

Rhombuniopsis tauriformis

Liu, X. & Liu, Y. & Wu, R. & Zanatta, D. T. & Lopes-Lima, M. & Goncalves, D. V. & Bogan, A. E. & Ouyang, S. & Wu, X. P. 2022: 1
Graf, D. L. & Cummings, K. S. 2021: 15
Zieritz, A. & Bogan, A. E. & Froufe, E. & Klishko, O. & Kondo, T. & Kovitvadhi, U. & Kovitvadhi, S. & Lee, J. H. & Lopes-Lima, M. & Pfeiffer, J. M. & Sousa, R. & Do, T. V. & Vikhrev, I. & Zanatta, T. D. 2018: 29
He, J. & Zhuang, Z. M. 2013: 100
Du, L. N. & Li, Y. & Chen, X. Y. & Yang, J. X. 2011: 216
Haas, F. 1920: 146
1920
Loc

Cuneopsis tauriformis

Simpson, C. T. 1914: 948
1914
Loc

Unio (Cuneopsis) tauriformis

Fulton H. C. 1906: 246
1906
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