Now showing items 1-10 of 362
Karyotype variability in eight species of the subfamilies Loricariinae and Ancistrinae (Teleostei, Siluriformes, Loricariidae)
Loricariidae is one of the largest fish families of the world, with about 650 species separated into six subfamilies. To date, cytogenetic data on only 56 species of this family are available. In the present study, the ...
Microscopical aspects od accessory air breathing through a modified stomach in the armoured catfish Liposarcus anisitsi (Siluriformes, Loricariidae)
(Faculty Press, 2001-01-01)
The presence of an accessory air breathing mechanism as verified by several authors, is widespread among Loricariidae, where modified parts of the digestive tract act primarily as oxygen-exchange organs. An anatomical and ...
Rineloricaria isaaci (Loricariidae: Loricariinae), a new species of loricariid catfish from the Uruguay River basin
(Wiley Blackwell Publishing, Inc, 2008-11-11)
Rineloricaria isaaci is described from tributaries of the Uruguay River basin in Argentina, Brazil and Uruguay. The new species is distinguished by having a long and wide area of naked skin at the snout tip, surpassing the ...
Considerations on the ichthyofauna of the Uruguay River basin: Hemiancistrus fuliginosus Cardoso & Malabarba, 1999 (Loricariidae: Ancistrinae)
The genus Hemiancistrus occur in basins in South America. In this work analyses the distribution of the genera in the Argentina and realize considerations of the icthyofauna of the cuenca to the Uruguay river.
On the Southern distribution of Hemiloricaria lanceolata (Günther, 1868) (Loricariidae: Loricariinae)
We report the presence of Hemiloricaria lanceolata (Günther) in the Paraná river basin in Argentina. This represents the first record on the species for this river, as well as its southern most known distribution. We provide ...
CYTOGENETIC STUDIES ON THE SUBFAMILY HYPOPTOPOMATINAE (PISCES, SILURIFORMES, LORICARIIDAE) .3. ANALYSIS OF 7 SPECIES
(Univ Florence Botany Inst, 1994-01-01)
Cytogenetic studies carried out on nine species belonging to five genera of the subfamily Hypoptopomatinae showed that this group has a relatively constant diploid number, 2n = 54, with only one species having 2n = 72 ...
Comparative cytogenetic analysis of eleven species of subfamilies Neoplecostominae and Hypostominae (Siluriformes : Loricariidae)
The family Loricariidae with about 690 species divided into six subfamilies, is one of the world's largest fish families. Recent studies have shown the existence of several problems in the definition of natural groups in ...
Localization of 18S ribosomal genes in suckermouth armoured catfishes Loricariidae (Teleostei, Siluriformes) with discussion on the Ag-NOR evolution
(Zoological Inst, 2012-01-01)
The family Loricariidae with about 690 species divided into six subfamilies, is one of the world's largest fish families. Cytogenetic studies conducted in the family showed that among 90 species analyzed the diploid number ...