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Yuzuru Suzawa 《Ichthyological Research》2006,53(4):315-322
A new species of spinous loach, Cobitis shikokuensis, is described based on 297 specimens from Shikoku Island, Japan. The new species was formerly known as the Shikoku group
of Cobitis takatsuensis. It can be distinguished from other species of Cobitis and closely related genera by a combination of the following characters: dorsal fin with 6 branched soft rays; anal fin with
5 branched soft rays; one brownish streak across eye from the tip of nose, no streak on cheek; a black spot smaller than eye
diameter near the dorsal corner of the caudal fin base; 3–5 small brownish speckles on ventral side of caudal peduncle; high
caudal peduncle with well-developed fleshy keels on dorsal and ventral side; a lamina circularis at base of dorsal part of
pectoral fin absent; first branched soft ray of pectoral fin broad in males; pectoral soft rays widely branched from the approximate
midpoint; last anal fin ray with 2 elements; interorbital width 11.2–17.1% of head length. 相似文献
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Taxonomic study of the Iberian Cobitis (Osteichthyes, Cobitidae), with description of a new species 总被引:1,自引:0,他引:1
Morphometric and electrophoretic variation are analysed among Iberian and African populations of Cobitis (Cobitidae). Three discrete morphotypes are distinguished, showing a remarkable genetic differentiation among them. Each of the three morphotypes is judged to represent a species, one being described as a new species. Both approaches agree on the separate status of the Iberian populations from the Alagón drainage, Tagus basin of west central Spain. This population is described as a new species, Cobitis vettonica sp. nov., a sexually dimorphic spined loach was assigned to the subgenus Iberocobitis Bacescu, 1961. Morphometric and electrophoretic data placed this new species phenetically close to Cobitis maroccana Pellegrin, 1929 and Cobitis pahdica De Buen, 1930, but differs from these species in overall shape, male coloration pattern, shorter barbels and fins, posterior lamina of the cleithrum, seven branched rays on the dorsal fin and in having a unique alleles at sAAT-2*, EST-1* and MPI* loci. The new species range described in this paper is more restricted than that of C. pahdica. Both inhabit the Tagus basin but have not been reported to be sympatric. 相似文献
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A new species of Phylloscopus warbler from central China 总被引:7,自引:0,他引:7
A new species of leaf warbler (Sylviidae: Phylloscopus) is described from the mountains of central China. Morphologically it is slightly, yet significantly, different from the partly sympatric P. (proregulus) chloronotus. However, both song and calls are very different, and playback tests elicited no response from either species to the other's song. There are also differences in habitat preference and breeding biology of the two species. 相似文献
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Arceuthobium pendens, a parasite of the pinyonsPinus discolor andP. cembroides, is described from San Luis Potosí and Veracruz, Mexico. This andA. divaricatum Engelm. are the only dwarf mistletoes known to parasitize pinyons.Arceuthobium pendens is distinct fromA. divaricatum Engelm. in its long, slender, greenish shoots, formation of systemic witches brooms, and frequency on various species of pinyons. With the discovery of this new species, 19 dwarf mistletoes are known from Mexico. 相似文献
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A new genus of Cobitinae, Bibarba gen. n., and a new species, B. bibarba sp. n., were discovered and are described for the Chengjiang River, a tributary of the Hongshuihe River in Guangxi Province of southern China. This river region is characterized by a Karst landscape, and the river that is inhabited by the new genus is a slowly moving stream with arenaceous and cobblestone beds. The new genus resembles Cobitis Linnaeus, 1758 (subfamily Cobitinae) in the shape and pigmentation pattern of their body, the absence of scales on their head, and the presence of a suborbital spine, but differs from it by a single Lamina circularis on the third pectoral fin ray instead of on the base of the second pectoral fin ray; two pairs of barbels (one rostral pair and one maxillo-mandibular pair) instead of three pairs of barbels (one rostral pair, one maxillary pair, and one maxillo-mandibular pair); a relatively thick and short suborbital spine with a strong medio-lateral process instead of a suborbital spine without or with a weakly formed medio-lateral process as in Cobitis; and the lack of a black stripe extending from the occiput through the eye to the insertion of the rostral barbel. The first two characters have not been reported in any other genus of the subfamily Cobitinae. A morphometric character analysis based on PCA reveals differences between B. bibarba and C. sinensis in body size, barbel length, interorbital width, pectoral fin length in males, and the position of the dorsal and ventral fins. Type specimens of the new species are kept in the Freshwater Fishes Museum of the Institute of Hydrobiology at the Chinese Academy of Sciences in Wuhan, Hubei Province. 相似文献
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Length–weight relationships of six species of the genera Cobitis and Sabanejewia (Cobitidae) in Iranian river systems 下载免费PDF全文
H. Mousavi‐Sabet A. Heidari K. Abbasi S. Vatandoust 《Zeitschrift fur angewandte Ichthyologie》2016,32(6):1310-1312
Length‐weight relationships (LWRs) were estimated for six spined loach species from Iran. Data were collected between 2010 and 2015. These represent the first reports of length–weight data for five of the species (Cobitis avicennae, Cobitis faridpaki, Cobitis keyvani, Sabanejewia aurata and Sabanejewia caspia) while also providing additional data on the remaining species (Cobitis linea). Five of these species are endemic and the remaining S. caspia, is native to the country. Estimated b values obtained for the studied species ranged from 2.381 for S. aurata to 3.411 for C. keyvani. 相似文献
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亚圆叶剪叶苔 新种 图1HerbertussubrotundatusFuetYi,sp.nov.Fig.1SpeciesH.herpocladioidiScottetMilleraffinis,seddiffertfoliisovatis,apicead1/2bifidis,lobulisangusteovatotriangularibus,vittaindistincta.Plantaminor,caespitosa,brunneavelfuscobrunnea.Caulissuberectus,ad1~2cml… 相似文献
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A new species from China, Thrixspermum tsii (Orchidaceae), is described and illustrated and its relationships to T. centipeda and T. subulatum are discussed. 相似文献
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Tseng Yung-Chien 《植物分类学报:英文版》1982,20(1):105-107