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| Tanichthys albiventris Li, Bohlen & Liao, T. flavianalis Li, Liao & Shen, in Li, Liao, Bohlen, Shen, et al., 2022. |
Abstract
Tanichthys albiventris, new species, from the River Jiangping in Dongxing City, Guangxi Province is distinguished from Tanichthys albonubes by the presence of a reddish-orange dorsal-fin margin (vs. white) and 9-10 (9 in mode) branched anal-fin rays (vs. 8 in mode). Tanichthys flavianalis, new species, from the River Jiuqu in Qionghai City, Hainan Province is distinguished from T. albiventris and T. albonubes by the presence of a golden anal-fin margin (vs. white) and 7 (rarely 6) branched dorsal-fin rays (vs. 6 in mode). In T. albiventris, T. albonubes, and T. flavianalis the black lateral stripe is located on the dorsal half of the flank, distinguishing them from Tanichthys kuehnei and Tanichthys micagemmae, in which it is mid-lateral. Tanichthys thabacensis is different from all other species of Tanichthys in the shape of the mouth and insertion of the anal fin; it is tentatively referred to as Aphyocypris.
KEYWORDS: Cyprinidae, Tanichthyidae, white cloud mountain minnow, cytochrome b, phylogeny, taxonomy
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| Lateral view of head and anterior body of adult males in three species of Tanichthys from China, showing colour pattern and tubercles on snout. A) Tanichthys albiventris, male, from its type locality; B) T. flavianalis, male, from its type locality; C) T. albonubes, male, from Gaoming District, Foshan City, Guangdong Province, China. Specimens not preserved. |
Tanichthys albiventris Li F., Bohlen J. & Liao T.-Y., new species
Diagnosis: Tanichthys albiventris is distinguished from T. albonubes by the presence of more branched anal-fin rays (9-10 vs. 8 in mode), and the colour of the dorsal-fin margin (reddish-orange vs. white); from T. kuehnei and T. micagemmae by the presence of a black lateral stripe located on the dorsal half of the flank (vs. on middle of flank), and a reddish-orange dorsal-fin margin (vs. white); from T. thacbaensis by the origin of the anal fin, anterior to the base of the last dorsal-fin ray (vs. posterior), and mouth superior (vs. terminal).
Etymology: The specific name, albiventris, is constructed from the Latin words albus, meaning white, and venter, meaning belly, an adjective, alluding to the distinctive white belly. A suggested Chinese vernacular is 白腹唐鱼.
Distribution and habitat: To date, known only from the upper reaches of the Rivers Jiangping and Huangzhu, in Jiangping Town, Dongxing City, Guangxi Province, China (Fig. 1). The type locality at the time of sampling was a small hill stream, about 2 m wide on average, located in the depths of the forest. Water depth varied from approximately 0.4 to 1 m. The bottom consisted of mud mixed with sand. Some aquatic plants (Cryptocoryne crispatula and Blyxa sp.) in the lower part of the habitat. Other fish species encountered were Oryzias pectoralis, Macropodus hongkongensis and Rhinogobius cf. duospilus.
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| Live specimens of Tanichthys from six localities in southern China. A) Tanichthys albiventris, male, from its type locality, JP; B) T. albiventris, male, from HZ; C) T. flavianalis, male, from its type locality, QH; D) T. albonubes, male, from CH; E) T. albonubes, male, from FS; F) T. albonubes, male, from GP. Specimens not preserved. |
Tanichthys flavianalis Li F., Liao T.-Y. & Shen Z.-X., new species
Diagnosis: Tanichthys flavianalis is distinguished from T. albonubes by the presence of more branched anal-fin rays (9-10, 9 in mode vs. 8 in mode), more branched dorsal-fin rays (7 in mode vs. 6 in mode), and a reddish-orange dorsal-fin margin (vs. white); from T. albiventris by the presence of more branched dorsal-fin rays (7 in mode vs. 6 in mode), and a golden anal-fin margin (vs. white); from T. kuehnei and from T. micagemmae by the presence of a black lateral stripe located on the dorsal half of the flank (vs. on middle of the flank), and a reddish-orange dorsal-fin margin (vs. white); from T. thacbaensis by the origin of the anal fin anterior to the base of the last dorsal-fin ray (vs. posterior), and mouth superior (vs. terminal).
Distribution and habitat: To date, known only from the upper reach of the River Jiuqu, in Qionghai City, Hainan Province, China (Fig. 1). The type locality at the time of sampling was a small stream (about 1.5 m wide on average) with a mixed mud and gravel substrate. The depth was mostly less than 0.4 m. There was no aquatic vegetation, but a lot of leaf litter. Coexisting fishes were O. pectoralis, Channa cf. gachua, M. hongkongensis, Rhinogobius wanchuangensis and Misgurnus anguillicaudatus.
Etymology: The specific name, flavianalis, is constructed from the Latin words flavus, meaning yellow, and analis, meaning anal, an adjective, alluding to the diagnostic light yellow anal fin with golden margin. A suggested Chinese vernacular is 黄臀唐鱼.
Fan Li, Te-Yu Liao, Jörg Bohlen, Zhi-Xin Shen, Liang-Jie Zhao and Shan Li. 2022. Two New Species of Tanichthys (Teleostei: Cypriniformes) from China. Journal of Vertebrate Biology 71 (21067), 21067.1-13. DOI: 10.25225/jvb.21067
