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| | Mantle: The mantle of bivalves encloses the entire animal, secretes the shell, serves as the first contact with the ... (Site not responding. Last check: 2007-11-07) |
 | | Coleoids are divided into two main groups, the Decapodiformes, with 8 arms and 2 muscular tentacles, and the Octopodiformes, with 8 arms and usually no tentacles (although the enigmatic deep water octopodiform group Vampyromorpha have 2 thin, sensory tentacles that are not homologous to decapodiform tentacles, as they are derived from arme II and IX). |
 | | Decapodiformes are characterized, among other characters, by the development of two large catch tentacles from arms IV and VII. |
 | | The classification of decapodiforms is in flux, here they are considered to represent several orders (not all orders are given). |
| www.flmnh.ufl.edu /malacology/IZ2005/LabNotes/Lab9/lab9.htm (5537 words) |
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