Forebrain evolution in bony fishes

@article{Northcutt2008ForebrainEI,
  title={Forebrain evolution in bony fishes},
  author={R. Glenn Northcutt},
  journal={Brain Research Bulletin},
  year={2008},
  volume={75},
  pages={191-205}
}
  • R. Northcutt
  • Published 18 March 2008
  • Biology
  • Brain Research Bulletin

Phylogeny of nucleus medianus of the posterior tubercle in rayfinned fishes.

In an attempt to explain the variation in the posterior tubercle of the diencephalon in ray-finned fishes, the immunohistochemistry and connections of nucleus medianus were examined in cladistians, gars and bowfins.

Stalking the Everted Telencephalon: Comparisons of Forebrain Organization in Basal Ray-Finned Fishes and Teleosts

Compared to land vertebrates and the other fishes, the basal ray-finned fishes and teleosts have morphologically unusual forebrains and several recent hypotheses have sought to explain this organization: partial eversion, caudolateral eversion and displacement, simple eversion with changed olfactory connections, and not quite so simple an eversions with preserved topology.

Stalking the everted telencephalon: comparisons of forebrain organization in basal ray-finned fishes and teleosts.

  • M. Braford
  • Biology
    Brain, behavior and evolution
  • 2009
Compared to land vertebrates and the other fishes, the basal ray-finned fishes and teleosts have morphologically unusual forebrains and several recent hypotheses have sought to explain this organization: partial eversion, caudolateral eversion and displacement, simple eversion with changed olfactory connections, and not quite so simple an eversions with preserved topology.

The Forebrain of Actinopterygians Revisited

The present author believes that Dp is situated in the immediate vicinity of its germinative zone and that it represents a specialized part of the lateral pallial zone in teleosts, a zone that can be homologized topologically with the medial pallium in inverted forebrains.

Exceptional fossil preservation and evolution of the ray-finned fish brain

Brain and cranial nerve soft-tissue preservation in †Coccocephalichthys wildi, a ∼319-million-year-old (Myr) ray-finned fish, indicates a more complicated pattern of brain evolution than suggested by living species alone, highlighting cladistian apomorphies and providing temporal constraints on the origin of traits uniting all extant ray- finned fishes.

An Evolutionary Interpretation of Teleostean Forebrain Anatomy

It is concluded that the posterior zone of the dorsal telencephalic area in teleosts is homologous to the piriform cortex and is formed by a migratory stream of cells originating in a dorsomedial Zone of the pallium (the primordial medial zone of area dorsalis telencephali).

What is the Thalamus in Zebrafish?

How evolutionary conserved and newly acquired features of the developing and adult zebrafish thalamus can be compared to the mammalian situation is discussed.

The development and general morphology of the telencephalon of actinopterygian fishes: synopsis, documentation and commentary

There are no reasons to doubt that the pallium of actinopterygian fishes is the product of a simple and complete eversion of its walls, according to the data derived from the literature and new observations on a large collection of histological material.
...

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  • M. Braford
  • Biology
    Brain, behavior and evolution
  • 1995
Caveats are raised concerning the above interpretations of DM and DL, which may have evolved independently of the telencephalic zones in tetrapods and may thus represent examples of homoplasy.

Head size constrains forebrain development and evolution in ray‐finned fishes

It is proposed that telencephalic eversion evolved because ray‐finned fish embryos are so small that their telencephon cannot evaginate but must, instead, squeeze into the space just dorsal to the developing nasal epithelia and rostral to the eyes—morphogenetic movements that amount to eversion.

The Telencephalon of Actinopterygian Fishes

The class of bony fishes or Osteichthyes is usually subdivided into two subclasses, the Actinopterygii or ray-finned fishes and the Sarcopterygii or lobe-finned fishes. The subclass last mentioned,

The Telencephalon of Sarcopterygian Fishes

The most important distinguishing feature of these fishes is the division of the neurocranium into two parts, an anterior, ethmo-sphenoid portion and a posterior, otico-occipital portion with an intracranial joint between them.

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A brief survey of the overall morphology and histological structure of the telencephalon in higher bony fishes, or Osteichthyes, to shed some light on the general forebrain organization on the basis of only a few species.

Visual Thalamotelencephalic Pathways in the Sturgeon Acipenser, a Non-Teleost Actinopterygian Fish

The thalamotelencephalic projections of a sturgeon, a non-teleost ray-finned fish, demonstrate that thalamic neurons in both retinal and tectal pathways project directly to the telencephalon, supporting the view that two visual pathways are a primitive feature of vertebrate brain organization.

Teleostean and mammalian forebrains contrasted: Evidence from genes to behavior

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Possible multiple evolution of indirect telencephalo-cerebellar pathways in teleosts: studies in Carassius auratus and Pantodon buchholzi

This work investigated telencephalic connections in two nonelectrosensory teleosts, the goldfish Carassius auratus and the freshwater butterflyfish Pantodon buchholzi, and cerebellar connections only in the latter species, since for C. auratus these connections are already established.
...