Gymnocorymbus Eigenmann, 1908
publication ID |
https://doi.org/10.11646/zootaxa.3956.1.1 |
publication LSID |
lsid:zoobank.org:pub:14870FDE-0B98-4B53-A9F5-F2FBAD0A761E |
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https://doi.org/10.5281/zenodo.6105511 |
persistent identifier |
https://treatment.plazi.org/id/846387A3-FFCC-3740-B7D0-FC7AFEA7F998 |
treatment provided by |
Plazi (2016-04-19 08:10:39, last updated 2024-11-27 08:38:06) |
scientific name |
Gymnocorymbus Eigenmann, 1908 |
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Gymnocorymbus Eigenmann, 1908 View in CoL View at ENA
Gymnocorymbus Eigenmann, 1908:93 View in CoL . Type species: Gymnocorymbus thayeri Eigenmann, 1908 View in CoL . Type by original designation. Gender: Masculine.
Diagnosis. In addition to the three features described under “Morphological support for monophyly and interrelationships within Gymnocorymbus ”, the combination of the following characters externally discriminate Gymnocorymbus within the Characidae : the predorsal area naked or with an irregular series of scales; the deep body (around 50% in SL); the 7–9 horizontal scale rows between the lateral line and the dorsal-fin origin; the elongate anal fin with iv,31–40 rays; the sheath of 2–6 horizontal rows of scales covering the anal-fin base; a sheath of scales covering the proximal two thirds of the lobes of caudal fin; and the absence of a predorsal spine.
Distribution. Gymnocorymbus is widely distributed in lowlands of the Orinoco, Corantijn, Amazon and Paraguay basins, and in the Rio Gurupi and Rio Parnaíba in northeastern Brazil ( Fig. 9 View FIGURE 9 ). Introduced populations of G. ternetzi occur in marginal lagoons of the Rio Mogi-Guaçu and Rio Grande, tributaries of the upper Rio Paraná and also in the upper Rio Paraíba do Sul in southeastern Brazil ( Fig. 9 View FIGURE 9 ). The reported occurrence of Gymnocorymbus thayeri in Trinidad and Tobago ( Phillip et al. 2013) could not be confirmed due to the impossibility of examine the associated vouchers.
Etymology. Gymnos from Greek, meaning naked; corymbus from Greek, meaning summit. Eigenmann (1908) refered to the smooth predorsal line due to absence of scales and/or the presence of a thick layer of epidermic cells in that area.
Eigenmann, C. (1908) Preliminary descriptions of new genera and species of tetragonopterid characins. Bulletim of the Museum of Comparative Zoology, 52, 91 - 106.
Phillip, D. A. T., Taphorn, D. C., Holm, E., Gilliam, J. F., Lamphere, B. A. & Lopez-Fernandez, H. (2013) Annotated list and key to the stream fishes of Trinidad & Tobago. Zootaxa, 3711 (1), 1 - 64. http: // dx. doi. org / 10.11646 / zootaxa. 3711.1.1
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Gymnocorymbus Eigenmann, 1908
Benine, Ricardo C., Melo, Bruno F., Castro, Ricardo M. C. & Oliveira, Claudio 2015 |
Gymnocorymbus
Eigenmann 1908: 93 |