1887

n African Natural History - Cretaceous faunas from Zululand and Natal, South Africa.
The ammonite subfamily Lyelliceratinae Spath, 1921

Volume 4, Issue 1
  • ISSN : 1816-8396

Abstract

The Lower and basal Middle Albian ammonite Subfamily Lyelliceratinae Spath, 1921 is reviewed, and restricted to the genera Hyatt, 1903, Spath, 1921, and Kennedy, 2004. An evolutionary origin in Brancoceratinae Spath, 1934 is proposed. The South American taxa from Colombia and Peru referred to Spath, 1930b, and its synonym Etayo-Serna, 1979, are lyelliceratine homoeomorphs, derived independently from Brancoceratinae. The North African Pervinquière, 1907 is tentatively referred to , while Dubourdieu, 1953 is a further lyelliceratine homoeomorph subgenerically or generically distinct from . The following are described from KwaZulu : (d'Orbigny, 1841), (Breistroffer, 1953), (d'Orbigny, 1841), (d'Orbigny, 1841), (Parona & Bonarelli, 1897), sp. nov., and (Michelin, 1838). On the basis of this revision, a sequence of four faunas are recognized, characterized, successively, by the presence of 1: and , 2: ; 3: , and 4: , the appearance of the last-named marking the base of the Middle Albian Substage.

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/content/afnathist/4/1/EJC17353
2008-12-01
2020-09-25

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