Gatunek typowy
Nanno belemnitiformis HOLM, 1885

Opis

Embryonic shell without chambers in apical part; septal necks very long, covering entirely the preceding neck.
Synonimew:
Lamottoceras FLOWER, 1955; Meniscoceras FLOWER. 1941; Allotrioceras FLOWER, 195::>; Mirabiloceras FLOWER, 155; 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