Veneroida

Veneroida
Empty cockle shell, family Cardiidae
Scientific classification
Kingdom:Animalia
Phylum:Mollusca
Class:Bivalvia
Subclass:Heterodonta
Order:Veneroida
Gray 1854
Families

See text

The Veneroida or veneroids are an order of mostly saltwater but also some freshwater bivalve molluscs. This order includes many familiar groups such as many clams and cockles that are valued for food, and a number of freshwater bivalves including the invasive species of zebra mussels.

Until recently, the Carditoida (cockles and their allies) were usually included in this group.

Description

Veneroids are generally thick-valved, equal valved, and isomyarian (that is, their adductor muscles are of equal size). Three main hinge teeth are characteristic of the subclass Heterodonta to which this order belongs. Many species are active rather than sessile. However they tend to be filter feeders, feeding through paired siphons, with a characteristic folded gill structure adapted to that way of life.

In 2002, Gonzalo Giribet and Ward Wheeler suggested that the orders Myoida and Veneroida were not monophyletic.[1] The World Register of Marine Species (WoRMS) currently divide the taxa contained in Veneroida between two orders, Cardiida (for Cardioidea and Tellinoidea) and Venerida (for the other superfamilies).[2][3]

Taxonomy

Order: Veneroida

See also

References

  1. ↑ Gonzalo Giribet and Ward Wheeler (November 2002). "On bivalve phylogeny: a high-level analysis of the Bivalvia (Mollusca) based on combined morphology and DNA sequence data". Invertebrate Biology. Wiley Online Library. 121 (4): 271–324. doi:10.1111/j.1744-7410.2002.tb00132.x.
  2. ↑ "Cardiida". MolluscaBase. World Register of Marine Species. 2018. Retrieved 2018-07-16.
  3. ↑ "Venerida". WoRMS. World Register of Marine Species. 2018. Retrieved 2018-07-16.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.