taxodont
Uniform teeth on the lock edge of a nut shell (Nuculidae)
As taxodont or as taxodontes lock that will lock a shell designated when the lock edge has many of the same tooth. The teeth are placed in a usually decreasing row on the edge of the mussel. These teeth prevent the two shell flaps from shifting against each other.
The taxodontic lock is present in the blueprint of the mussels and thus represents the most original state. Other types of lock teeth are derived from this basic shape through the differentiation of the teeth. These include, for example, the heterodontic lock with uneven teeth, which clams have, or the complete loss of the teeth in floating forms.
Typical groups with a taxodontic lock are the nut clams (Nuculidae), the ark clams (Arcidae) and the Glycimeridae .
supporting documents
- ^ A b c Willi Hennig : Wirbellose I. Gustav Fischer Verlag, Jena 1994 (6th edition, edited by Wolfgang Hennig ); Pp. 172-173. ISBN 3-334-60912-X .
- ↑ a b c Klaus Jürgen Götting : Bivalvia (Acephata, Pelecypoda), mussels. In: Wilfried Westheide , Reinhard Rieger (Ed.): Special Zoology. Part 1: Protozoa and invertebrates. G. Fischer, Stuttgart 1996; P. 322. ISBN 3-437-20515-3 .
- ^ A b Willi Hennig : Wirbellose I. Gustav Fischer Verlag, Jena 1994 (6th edition, edited by Wolfgang Hennig ); P. 174. ISBN 3-334-60912-X .