Paläontologische Zeitschrift

, Volume 70, Issue 3–4, pp 579–589

Endocranial casts of early archosaurian reptiles

  • David J. Gower
  • Andrei G. Sennikov


The first endocranial casts from non-crown-group archosaurian reptiles are described. Synthetic casts were made of the preserved parts of the endocranial cavities ofErythrosuchus africanus,Vjushkovia triplicostata andXilousuchus sapingensis. These casts are incomplete, but they reveal a substantial amount of information on the form of the early archosaur brain and inner ear. Cranial and pontine flexures are equal in bothErythrosuchus (45°) andV. triplicostata (35–40°). The endocasts ofXilousuchus andV. triplicostata are characterised by the possession of a pseudolagena and a quantifiable down-slope from the myelencephalon to the metencephalon — features that have yet to be described for other reptilian endocranial casts.


Zum erstenmal werden Gehirnabgüsse sehr früher Archosaurier beschrieben. Morphologische Daten wurden an Exemplaren vonErythrosuchus africanus, Vjushkovia triplicostata undXilousuchus sapingensis gewonnen. Die teilweise unvollständigen Abgüsse liefern eine Anzahl von neuen Daten über die Gestaltung des Gehirnes und Innenohres früher Archosaurier. Die craniale und pontische Flexur haben jeweils gleiche Winkel inErythrosuchus (45°) andV. triplicostata (35–40°).Xilousuchus andV. triplicostata besitzen außerdem eine Pseudolagena und einen meßbaren Abstieg vom Myelencephalon zum Metencephalon — Merkmale, die von Gehirnabgüssen anderer Archosaurier noch unbekannt sind.


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Copyright information

© E. Schweizerbart’sche Verlagsbuchhandlung 1996

Authors and Affiliations

  • David J. Gower
    • 1
    • 2
  • Andrei G. Sennikov
    • 3
  1. 1.Dept. of GeologyUniversity of BristolBristolUK
  2. 2.Geologisches InstitutUniversität TübingenTübingenGermany
  3. 3.Paleontological InstituteMoscowRussia

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