Rutoceratidae

Rutoceratidae is a family of prototypical nautilids, derived probably from either Brevicoceratidae or Acleistoceratidae of the order Oncocerida early in the Devonian. Rutoceratidae comprise a family within the oncocerid superfamily Tainocerataceae[1] They are generally characterized by cyrtoconic and gyroconic shells, commonly with spines, nodes, or frills, although some included genera are almost orthoconic, and a commonly empty, tubular ventral siphuncle.[1][2]

Rutoceratodae
Temporal range: 449.5–314.6 Ma
Hindeoceras
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Nautilida
Superfamily: †Tainocerataceae
Family: †Rutoceratidae
Hyatt, 1884

The Rutocertids lived during the Devonian and Mississippian (early Carboniferous) and are the ancestral stock of Nautilida.[1][3] Within the superfamily Taintocerataceae, rutoceratids gave rise to the exclusively Devonian family Tetragonoceratidae and near the start of the Mississippian to the family Koninkioceratidae which lasted into the Permian and to Tainoceratidae which lasted through most of the Triassic.

Genera

References
  1. Kummel 1964, Nautiloidea-Nautilida; Treatise on Invertebrate Paleontology, Part K: Nautiloidea, Teichert & Moore (eds)
  2. Flower and Kummel 1950; A Classification of the Nautiloidea; Journal of Paleontology, 24(50) 606–616, Sep 1950
  3. Flower (1988). "Progress and Changing Concepts in Cephalopod and Particularly Nautiloide Phylogeny and Distribution". In J Weidmann; J C Kullman (eds.). Cephalopods Present and Past. pp. 17–24.
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