Research Interests:
Lower Callovian records of Boreal Cardioceratidae and Kosmoceratidae from Crimea are reviewed. They include the index species of zonal and infrazonal Subboreal European scales, i.e. Cadoceras quenstedti, Kepplerites (Gowericeras)... more
Lower Callovian records of Boreal Cardioceratidae and Kosmoceratidae from Crimea are reviewed. They include the index species of zonal and infrazonal Subboreal European scales, i.e. Cadoceras quenstedti, Kepplerites (Gowericeras) curtilobus, and Catasigaloceras enodatum planicerclus with its microconch Gulielmiceras distans. These records suggest three invasions of Boreal ammonites to Crimea, in the C. quenstedti, K. curtilobus and C. enodatum planicerclus Hemerae.