Pectinida
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Scallop ( Pecten jacobaeus ) |
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| Scientific name | ||||||||||||
| Pectinida | ||||||||||||
| Adams & Adams , 1857 |
The Pectinida ( "scallop-like" ), also written Pectinoida in older publications , are an order of mussels (Bivalvia) from the infraclass Pteriomorphia within the Autolamellibranchiata . It is an exclusively marine group of mussels. The oldest Pectinida appear already in the Silurian .
characterization
The housings of the Pectinida are always more or less equally-valued (pteroidea) or also equally-valued (pinnoidea). The shell consists of an inner layer with aragonitic , mother-of-pearl microstructures and an outer, calcitic layer made up of simple prisms. In some groups this calcitic position is absent. The castle is largely reduced. The anterior sphincter is usually more or less significantly reduced. Most forms have a byssus . A foot is developed and remains during the entire ontogeny (in contrast to the Ostreida ). Tentacles are formed on the edge of the mantle.
Way of life
The Pectinida are exclusively marine mussels, which are mostly attached to the substrate with the help of organic byssus , are cemented with the right flap or lie freely on the sediment .
Systematics
The order Pectinida is not yet generally recognized, but is z. T. still placed on the order Ostreida . According to more recent phylogenetic studies, this order is only a superfamily of the Pteriida . The relationships between Pteriida, Limida and Pectinida have not yet been clarified. According to Bieler & Mikkelsen (2006) the order Pectinida contains four (recent) superfamilies. The family structure follows the MolluscaBase.
- Superfamily Pectinoidea Rafinesque , 1815
- Family Cyclochlamydidae Dijkstra & Maestrati, 2012
- Family Entoliidae Teppner, 1922
- Family Neitheidae Sobetski, 1960 †
- Family scallops (Pectinidae) Rafinesque 1815 (z. B., genus Chlamys with the types of Icelandic scallop ( Chlamys islandica ) and the Bunte scallop ( Mimachlamys varia ), the small scallop ( Aequipecten opercularis ) and the Mediterranean scallop ( Pecten jacobaeus ))
- Family Pleuronectitidae Hautmann, 2011 †
- Family Propeamussiidae Abbott, 1954
- Family spondylus (Spondylidae Gray, 1826)
- Family Tosapectinidae Trushchelev, 1984 †
- Superfamily Anomioidea Rafinesque, 1815
- Family saddle clams (Anomiidae Rafinesque, 1815)
- Saddle shell ( Anomia ephippium )
- Permanomiidae Carter family , 1990 †
- Family Placunidae Rafinesque, 1815
- Capiz clam ( Placuna placenta )
- Family saddle clams (Anomiidae Rafinesque, 1815)
- Superfamily Plicatuloidea Watson, 1930
- Plicatulidae Watson family , 1930
- Superfamily Dimyoidea Fischer , 1886
- Family Dimyidae fishermen, 1887
In addition, there are other, exclusively fossil-fueled superfamilies, some of which are insecure:
- Superfamily Aviculopetinoidea Meek & Hayden , 1864 †
- Superfamily Buchioidea Cox, 1953 †
- Superfamily Chaenocardioidea SA Miller, 1889 †
- Superfamily Entolioidea Teppner, 1922 †
- Superfamily Euchondrioidea Newell, 1938 †
- Superfamily Eurydesmatoidea Reed, 1932 †
- Superfamily Halobioidea Kittl , 1912 †
- Superfamily Heteropectinoidea Beurlen, 1954 †
- Superfamily Monotoidea Fischer, 1887 †
- Superfamily Oxytomoidea Ichikawa, 1958 †
- Superfamily Pseudomonotoidea Newell, 1938 †
- Superfamily Prospondyloidea Pchelintseva, 1960 †
- Superfamily Pterinopectinoidea Newell , 1938 †
literature
- Michael Amler, Rudolf Fischer & Nicole Rogalla: Mussels . Haeckel library, volume 5. Enke Verlag, Stuttgart 2000 ISBN 3-13-118391-8 .
- Rüdiger Bieler & Paula M. Mikkelsen: Bivalvia - a look at the branches . Zoological Journal of the Linnean Society, 148: 223-235, London 2006.