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Avilionella is a
Middle Ordovician tarphyceroid genus consisting of
closely coiled,
compressed s**** with a
small perforation in the center, shallow...
- B****leroceras. The
siphuncle is tubular, central.
Related genera include Avilionella, Barrandeoceras, Gasconsoceras, Laureloceras, and Savageoceras. Walter...
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Genera according to Flower, 1984 are:
Plectoceras Hyatt -type
genus Avilionella -removed from
Barradeoceratidae Bodeiceras,
Flower 1984.
added Chidleyenoceras...
- †Aturoidea †Augustoceras †Aulaconautilus †Aulametacoceras †Austinoceras †
Avilionella †Avoceras †Bactroceras †Badouceras †Baeopleuroceras †Bakeroceras †Balashovia...
- Gasconsoceras, Haydenoceras, and Paraplectoceras; and if included, Bickmorites.
Avilionella and Laureloceras,
included in the
Barrandeocerida in the
Treatise on...
