Search results

Query: keyword: "Ammonoidea"

Authors	M.B. Aguirre-Urreta, P.P. Alvarez
Title	The Berriasian genus Groebericeras in Argentina and the problem of its age
Journal	Scripta Geologica. Special Issue
Volume	3
Year	1999
Pages	15-29
ISSN	09224564
Keywords	Ammonoidea; Groebericeras; Berriasian; Tithonian; Argentina; Calpionellidae
Abstract	Groebericeras bifrons Leanza is described from the Chacao Formation of central Mendoza and the Lo Valdés Formation of central Chile. The species appears limited to the Argentiniceras noduliferum Zone, which is traditionally placed in the lower Berriasian. Spanish records of Groebericeras appear to be younger (Hoedemaeker, 1982), while Groebericeras from Iraq were placed in the late Berriasian by comparison with the Spanish records (Howarth, 1992).
Classification	38.22 ; 42.73
Document type	article
Download paper	http://www.repository.naturalis.nl/document/44316