Hadrocheilus ( Lozovskia) - a new subgenus of rhyncholites from the Upper Barremian deposits of South-Western Crimea

A new subgenus of Upper Barremian rhyncholites Hadrocheilus (Lozovskia) has been described. It differs from subgenus Hadrocheilus (Microbeccus) Shimansky et Nerodenko by much smaller size of the hood, as well as by the top of the handle, which is significantly raised over the hood, and by the flat d...

Full description

Saved in:
Bibliographic Details
Published inIzvestija vyss̆yh uc̆ebnyh zavedenij. Geologija i razvedka no. 5; pp. 69 - 71
Main Authors Komarov, V. N., Gaponenko, E. S., Tarasov, M. S.
Format Journal Article
LanguageEnglish
Russian
Published Sergo Ordzhonikidze Russian State University for Geological Prospecting 02.11.2018
Subjects
верхний баррем
ринхолиты
юго-западный крым
Online AccessGet full text

Cover

More Information
Summary:A new subgenus of Upper Barremian rhyncholites Hadrocheilus (Lozovskia) has been described. It differs from subgenus Hadrocheilus (Microbeccus) Shimansky et Nerodenko by much smaller size of the hood, as well as by the top of the handle, which is significantly raised over the hood, and by the flat dorsal side of the arm. Morphological features of the new taxon allow us to consider it to be an ancestral to Aptian genus Erlangericheilus, the most important feature of which is the transformation of the hood in a small tusk-shaped appendage.
ISSN:0016-7762
2618-8708
DOI:10.32454/0016-7762-2018-5-69-71