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1989-09
Vol. 19, Fasc. 1
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PalaeoVertebrata Vol. 19, Fasc. 1
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Article

Decouverte d'un nouveau Diacodexis (Artiocactyla, Mammalia) dans l'Eocène inférieur de Silveirinha, Portugal.
Carmen Estravis and Donald E. Russell
Published online: 15/09/1989

Keywords: Artiodactyla; Eocene; Migration; Portugal; Silveirinha

https://doi.org/10.18563/pv.19.1.29-44

References: 12

Cite this article: Carmen Estravis and Donald E. Russell, 1989. Decouverte d'un nouveau Diacodexis (Artiocactyla, Mammalia) dans l'Eocène inférieur de Silveirinha, Portugal. PalaeoVertebrata 19 (1): 29-44. doi: 10.18563/pv.19.1.29-44

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Abstract

A new artiodactyl, Diacodexis antunesi n.sp., is described from the early Eocene of Silveirinha, Portugal. Comparisons are made with Diacodexis gazini GODINOT, 1978, D. varleti SUDRE et al., 1983, D. cf. varleti from Paris Basin sites, D. sp. from Dormaal and from localities in Spain and England, D. secans from North America and D. pakistanensis from Asia; affinities and evolutive tendencies are discussed. The presence of Diacodexis in the locality of Silveirinha confirms the very early Eocene age of the latter. As Diacodexis antunesi appears ta be more primitive than D. gazini from Rians (early Eocene of France), it lends corroboration to the interpretation (essentially based previously on condylarths) of the Silveirinha assemblage as the oldest Eocene fauna known in Europe and supports the hypothesis that early artiodactyls migrated from Europe to North America. 



Published in Vol. 19, Fasc. 1 (1989)

References

ANTUNES, M.T., ESTRAVIS, C. & RUSSELL, D.E., 1987. – A new Condylarth (Mammalia) from the early Eocene of Silveirinha, Portugal. Münchner Geowiss. Abh., München, 10: 219-224, 1 pl., 2 tabl.

ANTUNES, M.T. & RUSSELL, D.E., 1981. – Le gisement de Silveirinha (Bas Mondego, Portugal): la plus ancienne faune de Vertébrés éocènes connue en Europe. C. r. Acad. Sci. Paris, 2ème sér., 293: 1099-1102.

GAZIN, C.L., 1952. – The Lower Eocene Knight Formation of Western Wyoming and its mammalian faunas. Smithsonian Misc. Coll., 117 (18): 1-82.

GHEERBRANT, E., 1987. – Les vertébrés continentaux de l'Adrar Mgorn (Maroc, Paléocène); une dispersion de mammifères transtéthysienne aux environs de la limite mésozoïque/cénozoïque?. Geodinamica Acta (Paris), 1 (4/5): 233-246. https://doi.org/10.1080/09853111.1987.11105142

GHEERBRANT, E. & RUSSELL, D.E., sous presse. – Presence of the genus Afrodon (Eutheria, Lipotyphla (?), Adapisoriculidae) in Europe; new data for the problem of trans-Tethyan relations between Africa and Europe around the K/T boundary. 

GODINOT, M., 1978. – Diagnoses de trois nouvelles espèces de mammifères du Sparnacien de Provence. C. r. somm. Soc. géol. Fr., Paris, (6): 286-288.

GODINOT, M., 1981. – Les mammifères de Rians (Eocène inférieur, Provence). Palaeovertebrata, Montpellier, 10 (2): 105-111. https://doi.org/10.18563/pv.10.2.43-126

HARRISON, C.J.O., 1983. – A new wader, Recurvirostridae (Charadriiformes) from the early Eocene of Portugal. Cienc. da Terra (UNL), Lisboa, 7: 9-16, 2 fig.

KRISHTALKA, L. & STUCKY, R.K., 1985. – Revision of the Wind River Faunas, early Eocene of central Wyoming. Part 7. Revision of Diacodexis (Mammalia, Perissodactyla). Ann. Carnegie Mus., 54 (14): 413-486. https://doi.org/10.5962/p.215183

PENA DOS REIS, R.P.B., SOARES, A.F. & ANTUNES, M.T., 1981. – As areias e argilas de Silveirinha. Mem. e Noticias, Publ. Mus. Lab. Mineral. Geol., Univ. Coimbra, 91-92: 245-267, Coimbra.

SUDRE, J., RUSSELL, D.E., LOUIS, P. & SAVAGE, D.E., 1983. – Les Artiodactyles de l’Eocène inférieur d’Europe. Bull. Mus. natn. Hist. nat., Paris, 4ème sér., 5, sect. C (3): 281-333.

THEWISSEN, J.G.M., RUSSELL, D.E., GINGERICH, P.D. & HUSSAIN, S.T., 1983. – A new dichobunid artiodactyl (Mammalia) from the Eocene of North-West Pakistan. Dentition and Classification. Proc. Kon. ned. Akad. Weten., ser. B, 86 (2): 153-180. 
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