A new Myleus species (Characiformes: Serrasalmidae) from the Rio Tapajós basin, Brazil
| Autor: | André L. Netto-Ferreira, Paulo A. Buckup, Michel Jégu, Marcelo C. Andrade |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Ostariophysi biology 010607 zoology Zoology Aquatic Science Characiformes Myleus Structural basin biology.organism_classification 010603 evolutionary biology 01 natural sciences Serrasalmidae Life stage stomatognathic system Taxonomy (biology) Thickening Ecology Evolution Behavior and Systematics |
| Zdroj: | Journal of Fish Biology. 92:1902-1914 |
| ISSN: | 0022-1112 |
| Popis: | Myleus pachyodus, a new serrasalmid species, is described from the Rio Teles Pires and Rio Jamanxim, both tributaries of the Rio Tapajos in Mato Grosso and Para states, Brazil. The new species differs from all congeners by having a remarkable ontogenetic thickening of the teeth shifting from slender incisiform in juveniles to thick bulky teeth at standard length ≥ 100 mm, whereas congeners present slender, antero-posteriorly flat teeth throughout all life stages. The new species further differs from congeners by having 18-20 branched dorsal-fin rays, by the lack of a diastema between contralateral outer series of premaxillary teeth and by the presence of 16-25 prepelvic spines, with the anteriormost spine never reaching the vertical through the pectoral-fin origin. |
| Databáze: | OpenAIRE |
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