Gatunek typowy
Nanno belemnitiformis Holm, 1885

Opis

Embryonic shell without chambers in apical part; septal necks very long, covering entirely the preceding neck.

Lamottoceras Flower, 1955; Meniscoceras Flower, 1941; Allotrioceras Flower, 1955; Mirabiloceras Flower, 1955; Rossoceras Flower, 1964; Williamsoceras Flower, 1964; Najaceras Flower, 1971; Kiotoceras Flower, 1971; Ignoceras Flower, 1976; Cacheoceras Flower, 1976; Perkinsoceras Flower, 1976; Emmonsoceras Flower, 1958

Synonimy

Zasięg czasowy

Literatura

Dzik, J. 1984a. Phylogeny of the Nautiloidea. Palaeontologia Polonica 45, 1-255