An atypical diencephalic nucleus in actinopterygian fishes

Visual connections and sporadic phylogenetic distribution

William Saidel, Ann B. Butler

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Nucleus rostrolateralis is a distinctive diencephalic nucleus in some ray-tinned fishes. In the osteoglossomorph Pantodon, it is a large ovoid nucleus with visual system connections. A topologically and cytoarchitectonically similar nucleus has been found in six species of non- osteoglossomorph fishes, two species of gars and four euteleosts. Of the latter, two are ostariophysans of the genus Danio, one an atherinomorph, and one a notothenioid percomorph. A variety of characteristic similarities can be found in nucleus rostrolateralis among all these species. The present study reports on these similarities in Danio and in the euteleost Xiphophorus as compared with the nucleus in Pantodon. While this nucleus has a phylogenetic distribution that might imply convergent evolution, the high degree of similarity in its features across species strongly suggests that its genetic basis may be the same despite the lack of phenotypic homology.

Original languageEnglish (US)
Pages (from-to)13-16
Number of pages4
JournalNeuroscience Letters
Volume229
Issue number1
DOIs
StatePublished - Jun 20 1997

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Skates (Fish)
Cyprinodontiformes
Fishes

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

Cite this

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An atypical diencephalic nucleus in actinopterygian fishes : Visual connections and sporadic phylogenetic distribution. / Saidel, William; Butler, Ann B.

In: Neuroscience Letters, Vol. 229, No. 1, 20.06.1997, p. 13-16.

Research output: Contribution to journalArticle

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