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The Podocopa are a subclass of
ostracod Ostracods, or ostracodes, are a class of the Crustacea (class Ostracoda), sometimes known as seed shrimp. Some 70,000 species (only 13,000 of which are extant) have been identified, grouped into several orders. They are small crustaceans, typic ...
s. Members of the subclass Podocopa can be differentiated from the other subclass of ostracods (
Myodocopa Traditionally, the Myodocopa and Podocopa have been classified as subclasses within the class Ostracoda, although there is some question about how closely related the two groups actually are. The Myodocopa are defined by possession of a poorly ca ...
) by the morphology of the second
antenna Antenna ( antennas or antennae) may refer to: Science and engineering * Antenna (radio), also known as an aerial, a transducer designed to transmit or receive electromagnetic (e.g., TV or radio) waves * Antennae Galaxies, the name of two collid ...
: the Podocopa have a relatively long endopod, whereas the Myodocopa have a relatively long exopod. The seventh limb of the Podocopa has a variety of forms or is absent, but is never an annulated worm-like limb (as seen in some Myodocopa).


Taxonomy

The following orders and unplaced families are recognised in the subclass Podocopa: * Order
Palaeocopida Palaeocopida is an order of ostracods in the subclass Podocopa. Most species in the suborder are extinct, and only the genera ''Manawa'' and '' Puncia'' in the family Punciidae Punciidae is a family of crustaceans belonging to the order Palaeoc ...
* Order
Platycopida The Podocopa are a subclass of ostracods. Members of the subclass Podocopa can be differentiated from the other subclass of ostracods (Myodocopa Traditionally, the Myodocopa and Podocopa have been classified as subclasses within the class Ostr ...
* Order
Podocopida The Podocopida are an order of ostracods in the subclass Podocopa. It is the most diverse of the four orders of ostracods, and also has a rich fossil record A fossil (from Classical Latin , ) is any preserved remains, impression, or trac ...
* Unplaced families ** Family † Pachydomellidae Berdan & Sohn, 1961 ** Family † Rectellidae Neckaya, 1966 ** Family † Rectonariidae Gruendel, 1962


References


External links

* * Arthropod subclasses {{ostracod-stub