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Protobranchia

Subclass of bivalves From Wikipedia, the free encyclopedia

Protobranchia
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Protobranchia is a subclass of bivalve molluscs.[1] It contains the extant orders Nuculanida, Nuculida, and Solemyida.

Quick Facts Scientific classification, Orders ...

These are deep water clams of a small and primitive order with a taxodont hinge (composed of many similar, small teeth), generally with a central ligament pit, large labial palps which are used in deposit feeding and the gills used only for respiration, the anterior and posterior adductor muscles are nearly equal in size, a foot which is divided sagittally and longitudinally with papillate margins. The foot in Protobranchia clams is without a true byssus gland, although they frequently have a nonhomologous byssal gland in the heel. The byssal gland in these clams does not produce threads as in Pteriomorphia.[2]

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2010 Taxonomy

In 2010 a new proposed classification system for the Bivalvia was published by Bieler, Carter & Coan revising the classification of the Bivalvia, including the subclass Protobranchia.[3]

Subclass: Protobranchia

Order: Nuculanida

Source:[4]

Order: Nuculida

Source:[5]

Order: Solemyida

Source:[6]

Order: † Praecardiida

  • Family: † Butovicellidae
    • Genus: † Butovicella
  • Family: † Praecardiidae
  • Family: † Antipleuridae
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References

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