Representatives ofthe Subfamily Cheloniceratinae Spath, 1923(Ammonoidea)fromthe Aptian ofMangyshlak,Western and Southern Turkmenistan. Paper 1. General Issues. The Genus Cheloniceras Hyatt, 1900

Abstract

The article presents the study results of the ammonite subfamily Cheloniceratinae Spath, 1923 representatives (genera Cheloniceras Hyatt, 1900 andEpicheloniceras Casey, 1954) fromthe Lower andMiddle Aptian ofMangyshlak,Western and Southern Turkmenistan. The diversity and stratigraphic distribution of species is assessed, intraspecific variability is identified and typified. Representatives of the genus Cheloniceras are described.