Maxillopoda


Maxillopoda
Temporal range: Mid Cambrian–Recent
Cyclops (Copepoda: Cyclopoida)
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Maxillopoda
Dahl, 1956 [1]
Subclasses

Maxillopoda is a diverse class of crustaceans including barnacles, copepods and a number of related animals. It does not appear to be a monophyletic group, and no single character unites all the members.[2]

Contents

Description


With the exception of some barnacles, maxillopodans are mostly small,[3] including the smallest known arthropod, Stygotantulus stocki.[2] They often have short bodies, with the abdomen reduced in size, and generally lacking any appendages.[3] This may have arisen through paedomorphosis.[3]

Apart from barnacles, which use their legs for filter feeding, most maxillopodans feed with their maxillae. They have a bauplan comprising 5 cephalic segments, 6 thoracic segments and 4 abdominal segments, followed by a telson.[4]

Fossil record


The fossil record of the group extends back into the Cambrian, with fossils of both barnacles[5] and tongue worms[6] known from that period.

Classification


Six subclasses are generally recognised, although many works have further included the ostracods among the Maxillopoda.[2] Of the six groups, only the Mystacocarida are entirely free-living; all the members of the Tantulocarida, Pentastomida, and Branchiura are parasitic, and many of the Copepoda and Thecostraca are parasites.

Subclass Members Photo
Copepoda Calanoida
Cyclopoida
Gelyelloida
Harpacticoida
Misophrioida
Monstrilloida
Mormonilloida
Platycopioida
Poecilostomatoida
Siphonostomatoida

Calocalanus pavo
(Calanoida: Calocalanidae)
Thecostraca Cirripedia (barnacles)
Facetotecta
Ascothoracida

Chthamalus stellatus
(Sessilia: Chthamalidae)
Branchiura Arguloida (fish lice)
Cyclida

Argulus on a stickleback
(Argulidae)
Pentastomida
(tongue worms)
Cephalobaenida
Porocephalida
Raillietiellida
Reighardiida

Armillifer armillatus
(Porocephalidae)
Mystacocarida Ctenocheilocaris
Derocheilocaris

Ctenocheilocaris
(Derocheilocarididae)
Tantulocarida Basipodellidae
Deoterthridae
Doryphallophoridae
Microdajidae

See also


References


  1. ^ "Maxillopoda" . Integrated Taxonomic Information System. Retrieved 2016-09-10.
  2. ^ a b c Joel W. Martin & George E. Davis (2001). An Updated Classification of the Recent Crustacea (PDF). Natural History Museum of Los Angeles County. p. 132.
  3. ^ a b c "Introduction to Maxillopoda" . University of California, Berkeley. Retrieved 2016-09-10.
  4. ^ Phil Myers (2001). "Maxillopoda" . Animal Diversity Web. Retrieved 2016-09-10.
  5. ^ B. A. Foster & J. S. Buckeridge (1987). "Barnacle palaeontology". In A. J. Southward (ed.). Crustacean Issues 5: Barnacle Biology. pp. 41–63. ISBN 978-90-6191-628-4.
  6. ^ Dieter Waloszek, John E. Repetski & Andreas Maas (June 2005). "A new Late Cambrian pentastomid and a review of the relationships of this parasitic group". Transactions of the Royal Society of Edinburgh: Earth Sciences. 96 (2): 163–176. doi:10.1017/S0263593300001280 .

External links









Categories: Maxillopoda | Crustacean taxonomy | Arthropod classes | Extant Cambrian first appearances




Information as of: 01.07.2021 09:10:03 CEST

Source: Wikipedia (Authors [History])    License : CC-BY-SA-3.0

Changes: All pictures and most design elements which are related to those, were removed. Some Icons were replaced by FontAwesome-Icons. Some templates were removed (like “article needs expansion) or assigned (like “hatnotes”). CSS classes were either removed or harmonized.
Wikipedia specific links which do not lead to an article or category (like “Redlinks”, “links to the edit page”, “links to portals”) were removed. Every external link has an additional FontAwesome-Icon. Beside some small changes of design, media-container, maps, navigation-boxes, spoken versions and Geo-microformats were removed.

Please note: Because the given content is automatically taken from Wikipedia at the given point of time, a manual verification was and is not possible. Therefore LinkFang.org does not guarantee the accuracy and actuality of the acquired content. If there is an Information which is wrong at the moment or has an inaccurate display please feel free to contact us: email.
See also: Legal Notice & Privacy policy.