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Hisonotus insperatus: New Species, from the Upper Rio Paraná Basin (Pisces: Ostariophysi: Loricariidae)
Hisonotus insperatus, new species, is distinguished by the combination of a pair of rostral plates at the tip of the snout, the complete median plate series to base of the caudal fin, a lateral line that is continuous along the middle of the body.
Description of two new sympatric species of the genus Hisonotus Eigenmann and Eigenmann, 1889, from upper Rio Tapajós, Mato Grosso state, Brazil (Pisces: Ostariophysi: Loricariidae).
Two new species of the genus Hisonotus are described from the upper Rio Tapajós basin, Mato Grosso State, Brazil, having the scapular bridge wide and totally exposed or having a small median pair of arrector fossae.
Salminus franciscanus, a new species from the rio São Francisco basin, Brazil (Ostariophysi: Characiformes: Characidae)
The large-sized dourado from the rio Sao Francisco basin, Brazil, is described and can be diagnosed from its congeners by the combination of the presence of an enlarged second tooth in the outer series of the dentary considerably larger than the remaining teeth.
Revisao taxonomica da familia prochilodontidae (ostariophysi: characiformes)
Structure and evolution of tetraodontoid teeth: An autoradiographic study (pisces, Tetraodontiformes)
The observations reported here, taken together with other data obtained on members of the Tetraodontoidei, permit clear definitions of “tooth” and “supporting bone,’ and consequently the structural meaning of coalescence.
Apareiodon Eigenmann, 1916 (Teleostei, Characiformes), from the Tocantins-Araguaia Basin, with Description of Three New Species
Apareiodon species from the Rio Tocantins-Araguaia basin, Brazil, were investigated to determine the recognizable species in that basin, and three new species inhabiting primarily headwater streams are described.
Coalescence of teeth in fishes
In this paper the concept of coalescence of teeth previously defined for the Tetraodontoid fishes is extended to some other teleostomes. Comments are made on the «dentigerous plates» of…
Comparative morphology of the gas bladder in driftwood catfishes (Siluriformes: Auchenipteridae)
Eight phylogenetic characters are proposed based on the morphology of the gas bladder and associated structures in species of Auchenipteridae, and the evolution of those characters in the family discussed.
Molecular identification of Leporinus from the south portion of South America
A new species of Leporinus Agassiz, 1829 from the upper Rio Paraná basin (Characiformes, Anostomidae) with redescription of L. elongatus Valenciennes, 1850 and L. obtusidens (Valenciennes, 1837)
A new species of Leporinus, endemic to the upper Rio Parana, very similar and sometimes mistaken with L. obtusidens, is formally described.