Ordovician Animals - Agnostida, Scenella, Ellesmerocerida, Endocerida, Orthoceras, Pterygotidae, Baltoceratidae, Cameroceras, Basslerocerida (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 33. Chapters: Agnostida, Scenella, Ellesmerocerida, Endocerida, Orthoceras, Pterygotidae, Baltoceratidae, Cameroceras, Basslerocerida, Dawsonoceratidae, Actinoceras, Rayonnoceras, Han solo, Geisonoceratidae, Bathmoceras, Megalograptus, Lambeoceras, Armenoceratidae, Allotrioceras, Geisonocerina, Proterocameroceratidae, Actinoceratidae, Proteoceratidae, Isotelus, Armenoceras, Aglaspidida, Rhabdiferoceras, Michelinoceras, Triarthrus, Pseudorthoceratidae, Protobactrites, Ormoceras, Cyptendoceras, Lituites, Meniscoceras, Promissum, Asaphus kowalewskii, Eosomichelinoceras, Pseudorthocerataceae, Cyrtobaltoceras, Narthecoceratidae, Cassinoceras, Wutinoceratidae, Garryoceras, Tretoceras, Donacoceras, Microbaltoceras, Discoceras, Metabaltoceras, Endorioceras, Clitendoceras, Atractopyge, Valcourocratidae, Quebecoceras, Eurypteridae, Clinoceratidae, Sactoceras, Levisoceras, Megalograptidae, Richmondoceras, Stereoplasmoceratidae, Cochlioceras, Cyrtoceras, Aphetoceras, Atrypa, Semiannuloceras, Eurypteroidea, Paradakeoceras, Trocholites, Palaeocycloceras, Burenoceras, Stylonuroidea, Castelloceras, Iberostomata, Dichograptus, Paracrinoid, Meristina, Columnaria, Pleurocystites, Solenomorpha, Mcqueenoceras, Platystrophia, Dicoelosia, Echinosphaerites, Echinochiton, Conocardium, Lobendoceras, Campendoceras, Glyptocrinus, Proterocameroceras, Reteocrinus, Bothriocidaris, Cotteroceras, Hazeliidae, Favositella, Hemithecella, Estonioceras, Paropsonemid, Stenaster, Suecoceras, Robustum nodum, Tetragraptus, Constellaria. Excerpt: Scenella is an extinct genus generally classified as a mollusc; it has been aligned with the gastropods, monoplacophorans, and helcionellids, although a firm association with either class has not been established. An affinity with the hydrozoa (as a flotation device) has been considered, although some authors oppose this hypothes...