Venerida

Venerida (formerly Veneroida) is an order of mostly saltwater but also some freshwater bivalve molluscs. This order includes many familiar groups such as many clams that are valued for food and a number of freshwater bivalves.

Venerida
LittleNeck clams USDA96c1862.jpg
The hard clam, Mercenaria mercenaria
Scientific classification e
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Heterodonta
Infraclass: Euheterodonta
Superorder: Imparidentia
Order: Venerida
Gray, 1854
Families

See text

Synonyms

Veneroida

Since the 2000s, the taxonomy currently represented in the World Register of Marine Species (WoRMS) classifies several taxa contained in the former Veneroida into other orders, such as the new Cardiida (for Cardioidea and Tellinoidea) and Carditida (cockles and their allies).[1][2]

DescriptionEdit

Venerids 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.[3] They have since been widely reorganised.

Orders and familiesEdit

Order: Venerida

ReferencesEdit

  1. ^ "Cardiida". MolluscaBase. World Register of Marine Species. 2018. Retrieved 2018-07-16.
  2. ^ "Venerida". WoRMS. World Register of Marine Species. 2018. Retrieved 2018-07-16.
  3. ^ 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. 121 (4): 271–324. doi:10.1111/j.1744-7410.2002.tb00132.x.

External linksEdit