Ermoceras is a thomboceratid ammonite from the Middle Jurassic ( u Baj) of central Arabia, Sinai, and Algeria with strong primary and secondary ribs and a single row of lateral tubercles; described as having a deep ventral groove Telermoceras, with low, depressed whorls, and Kosmermoceras with high,compressed whorls are considered subgenera of Erm...
Found on
No exact match found