Revision of the cranial anatomy and phylogenetic relationships of the Eocene minute boas Messelophis variatus and Messelophis ermannorum (Serpentes, Booidea)

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Revision of the cranial anatomy and phylogenetic relationships of the Eocene minute boas Messelophis variatus and Messelophis ermannorum (Serpentes, Booidea)

Agustín Scanferla [et al.] - Nama Orang;

We provide a detailed anatomical description of the skull of the fossil minute boas Messelophis variatus Baszio,
2004 and Messelophis ermannorum Schaal & Baszio, 2004 from the Middle Eocene Messel Formation (Germany),
as well as a cladistic analysis to infer their phylogenetic relationships. Reanalysis of new and known specimens
of both species demonstrates previously unrecognized anatomical characters in the skull of these fossil snakes.
Both morphological and combined (morphology plus DNA) analyses place both species of Messelophis within a clade
composed of boine, ungaliophiine, and erycine taxa. Cranial features that support this systematic arrangement
include a well-developed medial foot process of the prefrontal, an expanded lateral flange of the prefrontal, and a
well-developed surangular crest of the compound bone, among others. As a result of the incompleteness of some
crucial cranial regions, such as the basicranium, their exact relationships within this clade are currently unresolved.
Messelophis species display several contrasting traits that greatly exceed the morphological disparity found
among extant genera of snakes. This cranial and postcranial anatomical variation between M. variatus and
M. ermannorum demonstrates that this last species should be allocated to a new genus. Rieppelophis gen. nov.
is therefore erected for the species Rieppelophis ermannorum comb. nov.

ADDITIONAL KEYWORDS: anatomical description – Messel formation – Messelophis – middle eocene – phylogeny
– Rieppelophis gen. nov.

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Informasi Detail

Judul Seri: Zoological Journal of the Linnean Society
No. Panggil: -
Penerbit: : The Linnean Society of London., 2016
Deskripsi Fisik: Zoological Journal of the Linnean Society, 2016, 176, 182–206.
Bahasa: English
ISBN/ISSN: -
Klasifikasi: -
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: -
Subjek: BIOLOGI
Info Detail Spesifik: -
Pernyataan Tanggungjawab: Wati/Agus

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FULL TEXT:Revision of the cranial anatomy and phylogenetic relationships of the Eocene minute boas Messelophis variatus and Messelophis ermannorum (Serpentes, Booidea)

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