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Titolo:
On the evolution of the Hedbergellidae from the Praehedbergellidae
Autore:
Boudagher-Fadel, MK; Banner, FT; Gorbachik, TN; Simmons, MD; Whittaker, JE;
Indirizzi:
Univ Coll London, Dept Geol Sci, Postgrad Micropalaeontol Unit, London WC1E Univ Coll London London England WC1E 6BT cropalaeontol Unit, London WC1E Moscowussiaomonosov State Univ, Geol Fac, Dept Palaeontol, Moscow 119899, R Moscow MV Lomonosov State Univ Moscow Russia 119899 ol, Moscow 119899, R Univ Aberdeen, Dept Geol & Petr Geol, Aberdeen AB9 2UE, Scotland Univ Aberdeen Aberdeen Scotland AB9 2UE Geol, Aberdeen AB9 2UE, Scotland Nat Hist Museum, Dept Palaeontol, London SW7 5BD, England Nat Hist MuseumLondon England SW7 5BD laeontol, London SW7 5BD, England
Titolo Testata:
JOURNAL OF MICROPALAEONTOLOGY
, volume: 17, anno: 1998,
parte:, 2
pagine: 97 - 103
SICI:
0262-821X(199812)17:<97:OTEOTH>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Boudagher-Fadel, MK Univondon London, Dept Geol Sci, Postgrad Micropalaeontol Unit, Gower St, L Univ Coll London Gower St London England WC1E 6BT , L
Citazione:
M.K. Boudagher-Fadel et al., "On the evolution of the Hedbergellidae from the Praehedbergellidae", J MICROPALA, 17, 1998, pp. 97-103

Abstract

In order to establish the relationship between the smooth, microperforate praehedbergellid forms of the genus Blefuscuiana with the younger, macroperforate and muricate forms typical of Hedbergella, two similar taxa but withthe different characters of the two genera, are studied here: Blefuscuianapraetrocoidea (Kretchmar & Gorbachik) and its descendant Hedbergella trocoidea (Gandolfi), the type species of Hedbergella, and which typifies the Hedbergellidae. B. praetrocoidea was only found in the Early Aptian in the North Tethys. H. trocoidea ranges from the Late Aptian to Early Albian (?M. Albian) and isa cosmopolitan species. It evolves into Ticinella roberti (Gandolfi), a Late Aptian-Albian species with fused portici. The evolution of the Praehedbergellidae into the Hedbergellidae appears to be related to a relative sea-level rise in the Late Aptian and Albian (and the opening of the Proto-Atlantic) which provided a number of deep-water niches which the Hedbergellidae occupied.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 13:52:50