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Rhodeus albomarginatus, new species, is described from the Lvjiang River, a tributary flowing into Poyang Lake of Yangtze River basin, in Anhui Province, China. It is distinguished from all congeneric species by unique combination of characters: branched dorsal-fin rays 10; branched anal-fin rays 10-11; longest simple rays of dorsal and anal fins s...
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... vertebrae 16; caudal vertebrae 17-18; total vertebrae 33-34. Inserted position of first pterygiophore in dorsal fin 9-10. Inserted position of first pterygiophore in anal fin 16 (Fig. 3). Pharyngeal teeth in one row, 0.0.5-5.0.0, occlusal grooves relatively reduced (Fig. 4). Gill rakers on external side of first gill arch 11-12. Unfertilized ripe eggs ellipsoid, ratio of major axis to minor axis, 1.9-2.1 (Fig. 5A). Larvae with wing-like yolk sac projections (Fig. ...
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Rhodeus shitaiensis, new species, is described from the Qiupu River, Anhui Province, China. It is distinguished from other Rhodeus species by the combination of branched dorsal-fin rays 9-10 (usually 9); branched anal-fin rays 9-10 (usually 9); longest simple rays of dorsal and anal fins strong and stiff, distally segmented; longitudinal scale seri...
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... Mẫu cá được phân tích, định loại dựa vào đặc điểm hình thái ngoài và tham khảo trên các tài liệu chính sau: Chen và cộng sự [10], Yue và cộng sự [11], Kottelat [12], [13], Nguyễn Văn Hảo và Ngô Sỹ Vân [14], Nguyễn Văn Hảo [15], [16], Kottelat [17], Li và Arai [18]. Tên khoa học của các bậc phân loại và trình tự sắp xếp bộ, họ theo Fricke và cộng sự [19]. ...
... So sánh với nghiên cứu của Nguyễn Hữu Dực và cộng sự [21], nghiên cứu này đã cập nhật và bổ sung 4 loài là ghi nhận mới cho khu hệ cá ở lưu vực sông Hồng: Opsariichthys minutus, Microphysogobio elongatus, Placogobio bacmeensis và Rhinogobius mekongianus. Ngoài ra, có những mẫu vật chưa xác định được tên loài vì có sai khác về đặc điểm hình thái so với các mô tả trước [11], [14], [15], [18], đó là: Liniparhomaloptera cf. qiongzhongensis và Rhodeus cf. ...
Khu bảo tồn thiên nhiên Bắc Mê, tỉnh Hà Giang có tiềm năng đa dạng sinh học cao với nhiều loài động thực vật quý, hiếm, nguy cấp. Tuy nhiên, thông tin về đa dạng thành phần loài cá ở khu vực này còn nhiều hạn chế. Nhằm cung cấp hiện trạng thành phần loài và phân bố các loài cá, hai đợt khảo sát đã được thực hiện vào tháng 7 và tháng 12 năm 2019 tại 13 điểm có độ cao từ 92 tới 325 m so với mặt nước biển thuộc lưu vực sông Gâm ở khu bảo tồn. Danh sách thành phần loài cá cơ bản hoàn thiện với 42 loài thuộc 34 giống, 20 họ và 7 bộ. Cypriniformes là bộ đa dạng nhất với 8 họ, 22 giống, 28 loài. Trong đó, Cyprinidae đa dạng nhất với 6 giống và 8 loài. Nghiên cứu đã bổ sung 4 loài cho khu hệ cá ở lưu vực sông Hồng và ghi nhận 1 loài trong Danh lục Đỏ IUCN, 3 loài thuộc Nhóm I và II theo Nghị định 26/2019/NĐ-CP của Chính phủ. Loài Opsariichthys minutus và Channa gachua phân bố rộng nhất. Số lượng loài lớn nhất tại các điểm ở độ cao 243 m và 121 m so với mực nước biển. Các kết quả trên là dẫn liệu cơ sở quan trọng cho công tác khai thác, bảo tồn và phát triển bền vững nguồn lợi cá của địa phương.
... Li et al. 2017). Bitterlings have a complicated taxonomic history at the family, subfamily, genus and species level especially by applying molecular data and new genera and species are being described (Chang et al. 2014, Li & Arai 2014, Li et al. 2017. ...
... nov. is distinguished from R. albomarginatus Li & Arai, 2014 from the Lvjiang River, a tributary flowing into Poyang Lake of Yang-tze River basin, in Anhui Province, China by branched anal-fin rays 9-10, usually 9 (vs. modally10-11 based on Li & Arai 2014); and colour pattern of adult males (dorsal and anal fins of males edged with black margin vs. white margin, according to Li & Arai (2014)). ...
A new bitterling from the Rhodeus amarus group is described based on morphological and molecular data. Rhodeus caspius sp. nov. from the Caspian Sea, Urmia Lake and the upper Tigris River drainages in Iran, is distinguished from its closest congeners (R. amarus and R. colchicus) by having short post-dorsal distance and caudal peduncle length and long head length. It is also characterized by one fixed diagnostic nucleotide substitutions and a K2P nearest neighbor distance of 1% to R. amarus and R. colchicus in the mtDNA COI barcode region.
... lateral line incomplete, barbels absent, two rows of light spots on dorsal fin rays, pharyngeal teeth formula 0,0,5-5,0,0, a black blotch on anterior part of dorsal fin in juveniles (absent in R. amarus (Bloch 1782), R. meridionalis Karaman 1924, and R. sericeus (Pallas, 1776)), and wing-like yolk sac projections in the larvae (Arai & Akai 1988;Li et al. 2017;Li et al. 2020). Rhodeus is distributed in two disjunct regions of Eurasia and includes about 21 species/subspecies, with 18 in East Asia, and three in Europe and West Asia (Arai et al. 2001;Bogutskaya & Komlev 2001;Bohlen et al. 2006;Li & Arai 2014; Bartáková et al. 2019;Li et al. 2020). ...
... In the Yangtze River basin, which is the largest river in China and the third longest river in the world, seven species of Rhodeus have been reported, viz. R. albomarginatus Li & Arai 2014, R. cyanorostris Li, Liao & Arai 2020 fangi (Miao 1934), R. nigrodorsalis Li, Liao & Arai 2020, R. ocellatus (Kner 1866), R. sinensis (Günther 1868), and R. shitaiensis Li & Arai 2011(Kner 1867Lin 1935;Woo 1964;Lin 1998;Akai & Arai 1998;Zhang et al. 2016;Li et al. 2020). In the present study, we describe a new species of Rhodeus from the Le-An River, a tributary flowing into the Poyang Lake in the Yangtze River basin, in Wuyuan County, Jiangxi Province. ...
... In addition to the color pattern provided in the diagnosis, R. flaviventris can be further distinguished from R. albomarginatus by fewer branched dorsal fin rays (9-10, 9 in mode vs. 10), egg spindle-shaped (vs. ellipsoid) and larger egg size (major axis 3.1-3.7 mm vs. 2.7-2.9 mm) (Li & Arai 2014; egg size of R. albomarginatus was examined from three clutches of eggs from different females collected from its type locality in this study). ...
Rhodeus flaviventris, a new species, is described from the Le-An River, a tributary flowing into Poyang Lake in the Yangtze River basin, in Jiangxi Province, China. It is distinguished from all congeners by the combination of characters: branched dorsal-fin rays 9 (9–10); branched anal-fin rays 9 (9–10); longest simple rays of dorsal and anal fins thick and stiff; longitudinal scale series 33–34; transverse scale series 11 (10–12); pored scales 4–7; vertebrae 32–34; spindle-shaped eggs with major axis of 3.1–3.7 mm; color pattern of nuptial males (iris yellowish, belly yellow, central part of caudal fin orange, dorsal and anal fins with reddish-orange stripe).
... The two new species share a smaller number of branched dorsal-and anal-fin rays (both no more than 9), which make them distinguishable from all other Rhodeus species (all more than 8) (Pallas 1776, Bloch 1782, Tirant 1883, Jordan & Thompson 1914, Karaman 1924, Oshima 1926, Nichols 1929, Miao 1934, Arai et al. 1990, Akai & Arai 1998, Kottelat 1998, Arai et al. 2001, Li & Arai 2014 (Table 3). Rhodeus cyanorostris sp. ...
... In the Acheilognathinae, a complete lateral line is present in all species of the genera Acheilognathus (except A. typus (Bleeker, 1863)), Tanakia, and Paratanakia, while the lateral line is incomplete in A. typus and all species of Rhodeus, Sinorhodeus, and Pseudorhodeus (Tanaka 1909, Lin 1935, Woo 1964, Lin 1998, Hosoya 2002, Arai & Kato 2003, Kottelat & Freyhof 2007, Chang et al. 2014, Li et al. 2017 Regan, 1905, A. rhombeus (Temminck & Schlegel, 1846 and A. typus) spawn mainly in autumn (Kawamura et al. 2014), and R. albomarginatus and A. macromandibularis Doi, Arai & Liu, 1999spawn in summer (Doi et al. 1999, Li & Arai 2014; the breeding season of A. macromandibularis was confirmed based on personal observations by the first author). Some species distributed in tropical regions may spawn all the year around. ...
Rhodeus cyanorostris sp. nov. and R. nigrodorsalis sp. nov. are described from two tributaries of the River Yangtze, in Sichuan and Jiangxi Provinces, China, respectively. Both species have a small number of branched dorsal-fin rays (both with a mode of 8) and anal-fin rays (mode of 7-8 and 8, respectively), which makes them easily distinguished from all congeners. Rhodeus cyanorostris sp. nov. differs from R. nigrodorsalis sp. nov. in having more predorsal scales (14-16 vs. 12-13), fewer pectoral-fin rays (10-11 vs. 12), a shorter major axis of the eggs (2.5-2.8 mm vs. mostly 3.3-3.5 mm), absence of two rows of light spots on the dorsal-fin rays (vs. presence), and absence of a black blotch on the dorsal fin in adult males (vs. presence). The breeding season in winter of the two new species is unique among the Acheilognathinae.
... The subfamily Acheilognathinae, commonly known as the bitterlings, comprise approximately 81 species in five genera and one unnamed clade and are distributed throughout Eurasia (Arai & Akai 1988;Yang et al. 2011;Li & Arai 2014). The genera Acheilognathus Bleeker with 40 species (Yang et al. 2011;Nguyen et al. 2013), Tanakia sensu lato (including Tanakia Jordan & Thompson, Paratanakia Chang, Chen & Mayden, and Pseudorhodeus Chang, Chen & Mayden) with nine species (Arai & Akai 1988;Chang et al. 2014;Kim et al. 2014), and an unnamed clade with three species (Yang et al. 2010;Chang et al. 2014), are confined to East Asia (Kottelat 1998;Lin 1998;Kottelat 2001;Hosoya 2002;Chen & Chang 2005;Bogutskaya et al. 2009;Kim et al. 2014), while the genus Rhodeus Agassiz with 19 species, is widespread from East Asia to Western Europe (Bohlen et al. 2006;Chang et al. 2014;Li & Arai 2014). ...
... The subfamily Acheilognathinae, commonly known as the bitterlings, comprise approximately 81 species in five genera and one unnamed clade and are distributed throughout Eurasia (Arai & Akai 1988;Yang et al. 2011;Li & Arai 2014). The genera Acheilognathus Bleeker with 40 species (Yang et al. 2011;Nguyen et al. 2013), Tanakia sensu lato (including Tanakia Jordan & Thompson, Paratanakia Chang, Chen & Mayden, and Pseudorhodeus Chang, Chen & Mayden) with nine species (Arai & Akai 1988;Chang et al. 2014;Kim et al. 2014), and an unnamed clade with three species (Yang et al. 2010;Chang et al. 2014), are confined to East Asia (Kottelat 1998;Lin 1998;Kottelat 2001;Hosoya 2002;Chen & Chang 2005;Bogutskaya et al. 2009;Kim et al. 2014), while the genus Rhodeus Agassiz with 19 species, is widespread from East Asia to Western Europe (Bohlen et al. 2006;Chang et al. 2014;Li & Arai 2014). ...
... The Yangtze River contains a high diversity of acheilognathines, including 13 species of Acheilognathus, five species of Rhodeus, one species of Paratanakia, and three species of the unnamed clade (Miao 1934;Lin 1935;Wu 1964;Lin 1998;Doi et al. 1999;Yang et al. 2010;Li & Arai 2011;Chang et al. 2014;Li & Arai 2014;Zhang et al. 2016), among which three species were recently described (Yang et al. 2010;Li & Arai 2011;Li & Arai 2014) and more may be waiting to be discovered. ...
A new genus and species, Sinorhodeus microlepis gen. et sp. nov., is described from a tributary of the Yangtze River, in Chongqing City, China. Sinorhodeus gen. nov. can be distinguished from four closely related genera, Paratanakia, Pseudorhodeus, Rhodeus, and Tanakia, by the following combination of characters: pharyngeal teeth 0,0,4–4,0,0, longitudinal scales 41–46, white spots on dorsal-fin rays absent, a black blotch on dorsal fin in juvenile absent, and less developed wing-like yolk sac projections in larvae. Phylogenetic analysis of one mitochondrial gene and six nuclear genes supports the establishment of the new genus.
... Up to 24 valid species are currently recognized in the genus Rhodeus (Catalog of Fishes..., 2014;Fish Base..., 2014;Li and Arai, 2014). The bitterling from the Ili basin is distinguished from most of these species in a greater number of branched rays in unpaired fins. ...
Based on the results of morphological studies of materials on bitterlings (genus Rhodeus) and loaches (genus Misgurnus) collected in the Ili River basin (Kazakhstan) in 2011, it is shown for the first time that the rosy bitterling R. ocellatus and Nikolsky’s loach M. nikolskyi have naturalized in the Balkhash–Ili basin.
... A detailed morphological examination and taxonomic revision for these two species of Rhodeus is warranted. The most recently described species of Rhodeus, R. albomarginatus (Li and Arai, 2014), is morphologically most similar to R. ocellatus, but gene trees resolve the species as sister to R. shitaiensis, an example illustrating that phenetic similarity does not necessarily reflect a genealogical relationship (Fig. 1c). Incongruence between the consistently resolved nuclear and mitochondrial gene trees and morphological similarity of samples of a particular species, may explain the above examples wherein gene trees do not support some specimens from the same or different populations of a species as sharing a common lineage. ...
Rhodeus cyanorostris Li, Liao & Arai, 2020 is a freshwater fish that is endemic to China and restricted to Chengdu City in Sichuan Province. This study is the first to sequence and characterize the complete mitochondrial genome of R. cyanorostris . The mitogenome of R. cyanorostris is 16580 bp in length, including 13 protein-coding genes, two rRNA genes, 22 tRNA genes, and a control region (D-loop). The base composition of the sequence is 28.5% A, 27.6% C, 26.4% T, and 17.5% G, with a bias toward A+T. The genome structure, nucleotide composition, and codon usage of the mitogenome of R. cyanorostris are consistent with those of other species of Rhodeus . To verify the molecular phylogeny of the genus Rhodeus , we provide new insights to better understand the taxonomic status of R. cyanorostris . The phylogenetic trees present four major clades based on 19 mitogenomic sequences from 16 Rhodeus species. Rhodeus cyanorostris exhibits the closest phylogenetic relationship with R. pseudosericeus , R. amarus , and R. sericeus . This study discloses the complete mitochondrial genome sequence of R. cyanorostris for the first time and provides the most comprehensive phylogenetic reconstruction of the genus Rhodeus based on whole mitochondrial genome sequences. The information obtained in this study will provide new insights for conservation, phylogenetic analysis, and evolutionary biology research.
