A new Early Carboniferous nautilid from the Caney Formation of Oklahoma, Central North America

Abstract

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Early Carboniferous nautiloids from the Central Sahara, southern Algeria

“…Histon (1999) characterised the genus Epistroboceras, among other characteristics, by the strongly compressed conch, converging flanks and narrow concave venter. More recently, Niko & Mapes (2004) discussed the relationship between Stroboceras and Epistroboceras; in distinguishing the two genera, they upheld the presumed detachment of the adult whorl in Stroboceras. As a further difference between the two genera, they mentioned that the "… lateral grooves developed in the juvenile stage become obsolescent with maturity" in Epistroboceras (Niko & Mapes 2004: 341).…”