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Phylogenetic position of the crocodylian Megadontosuchus arduini and tomistomine palaeobiogeography

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Piras P., Delfino M., Del Favero L., Kotsakis T.

Acta Palaeontologica Polonica

2007

tom 52

nr 2

A cladistic analysis of Megadontosuchus arduini from the middle Eocene of Monte Duello (NE Italy) confirms its tomistomine relationships, but the low number of scorable characters determines a low resolution within the tomistomine clade. However, Megadontosuchus is clearly distinct from the other Eocene European or North African tomistomines, in having a moderate elongated but robust rostrum, massive maxillary and dentary teeth and large supratemporal fenestrae. The rostrum and teeth characteristics could indicate that M. arduini had a degree of feeding specialization intermediate between Maroccosuchus zennaroi and the Eocene European tomistomines. A summary of tomistomine palaeobiogeography suggests that despite only one species with a rather restricted range survives at present, such a clade had a glorious past with a world wide distribution documented by a conspicuous fossil record that starts at least in the early Eocene. At present, a detailed knowledge of tomistomine palaeobiogeography is hindered by the lack of modern taxonomic revisions of some fossil remains and therefore by the poor understanding of phylogenetic relationships.

Ograniczanie wyników

1 Acta Palaeontologica Polonica

1 Del Favero L.

1 Delfino M.

1 Kotsakis T.

1 Piras P.

1 2007

Wyniki wyszukiwania

Phylogenetic position of the crocodylian Megadontosuchus arduini and tomistomine palaeobiogeography