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Upper Albian (Cretaceous, M. romeri Zone) ammonites in Texas and Mexico

Upper Albian (Cretaceous, M. romeri Zone) ammonites in Texas and Mexico

Journal of Paleontology 42(1): 70-80

ISSN/ISBN: 0022-3360

DOI: 10.2307/1302128

The upper Albian zone of Mortoniceras (Boeseites) romeri (Haas) is widespread through Trans-Pecos Texas, northern Coahuila, and northern Chihuahua, Mexico. It overlies the zone of Adkinsites bravoensis and is overlain by the zone of Craginites serratescens. Typical species of the romeri zone are known only from Angola and from Texas and northern Mexico. This restricted distribution cannot be explained as yet. The name, Boeseites is proposed as a new subgenus of Mortoniceras Meek and is applied to the romeri group of Mortonicerinae.

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Accession: 020551009

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