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Crustaceomorpha

Crustaceomorpha is a proposed clade of arthropods that includes crustaceans and numerous extinct groups. Synapomorphies for the clade are that the larval antenna is a feeding or locomotory organ, and there are six endopodal podomeres in post-antennal limbs.[1]

Crustaceomorpha
Temporal range: Cambrian to Recent
Nebalia bipes, a leptostracan crustacean
Scientific classification
Kingdom:
Phylum:
(unranked):
Crustaceomorpha

Chernyshev, 1960
Subphyla

Extinct groups included in Crustaceomorpha vary considerably. It includes Agnostida (usually treated under Trilobita), Waptiida, Isoxyida, Phosphatocopida, and Bradoriida, among others. These primitive crustaceomorphs are grouped under Pseudocrustacea.[2][3]

The validity of Crustaceomorpha is controversial. It has more support among paleontologists who consider it a sister group to Arachnomorpha, which includes trilobites and chelicerates (see cladogram below). Both are grouped under Schizoramia, a clade of arthropods with biramous appendages.[3][4] In contrast, neontologists tend to support the Mandibulata clade, which groups members of Crustacea together with Hexapoda and Myriapoda.[4]

      Common ancestor ←      
             

Lobopodia

             
             

Uniramia

      Schizoramia      
             

Crustaceomorpha

             

Arachnomorpha

See also edit

References edit

  1. ^ Jan Bergström & Xian-Guang Hou (2005). "Early Palaeozoic non-lamellipedian arthropods". In Stefan Koenemann & Ronald A. Jenner (ed.). Crustacea and Arthropod Relationships. Crustacean Issues. Vol. 16. Taylor & Francis. pp. 75–93. doi:10.1201/9781420037548.ch4. ISBN 978-0-8493-3498-6.
  2. ^ Mikko Haaramo. "Crustaceomorpha – crustaceans and related arthropods". Mikko's Phylogeny Archive. Retrieved January 22, 2012.
  3. ^ a b S. M. Gon III. "Trilobite Systematic Relationships". A Guide to the Orders of Trilobites. Retrieved January 22, 2012.
  4. ^ a b David A. Grimaldi & Michael S. Engel (2005). Evolution of the Insects. Cambridge University Press. p. 107. ISBN 978-0-521-82149-0.


crustaceomorpha, proposed, clade, arthropods, that, includes, crustaceans, numerous, extinct, groups, synapomorphies, clade, that, larval, antenna, feeding, locomotory, organ, there, endopodal, podomeres, post, antennal, limbs, temporal, range, cambrian, recen. Crustaceomorpha is a proposed clade of arthropods that includes crustaceans and numerous extinct groups Synapomorphies for the clade are that the larval antenna is a feeding or locomotory organ and there are six endopodal podomeres in post antennal limbs 1 CrustaceomorphaTemporal range Cambrian to Recent PreꞒ Ꞓ O S D C P T J K Pg N Nebalia bipes a leptostracan crustacean Scientific classification Kingdom Animalia Phylum Arthropoda unranked CrustaceomorphaChernyshev 1960 Subphyla Crustacea Pseudocrustacea Extinct groups included in Crustaceomorpha vary considerably It includes Agnostida usually treated under Trilobita Waptiida Isoxyida Phosphatocopida and Bradoriida among others These primitive crustaceomorphs are grouped under Pseudocrustacea 2 3 The validity of Crustaceomorpha is controversial It has more support among paleontologists who consider it a sister group to Arachnomorpha which includes trilobites and chelicerates see cladogram below Both are grouped under Schizoramia a clade of arthropods with biramous appendages 3 4 In contrast neontologists tend to support the Mandibulata clade which groups members of Crustacea together with Hexapoda and Myriapoda 4 Common ancestor Lobopodia Uniramia Schizoramia Crustaceomorpha ArachnomorphaSee also editPancrustacea MandibulataReferences edit Jan Bergstrom amp Xian Guang Hou 2005 Early Palaeozoic non lamellipedian arthropods In Stefan Koenemann amp Ronald A Jenner ed Crustacea and Arthropod Relationships Crustacean Issues Vol 16 Taylor amp Francis pp 75 93 doi 10 1201 9781420037548 ch4 ISBN 978 0 8493 3498 6 Mikko Haaramo Crustaceomorpha crustaceans and related arthropods Mikko s Phylogeny Archive Retrieved January 22 2012 a b S M Gon III Trilobite Systematic Relationships A Guide to the Orders of Trilobites Retrieved January 22 2012 a b David A Grimaldi amp Michael S Engel 2005 Evolution of the Insects Cambridge University Press p 107 ISBN 978 0 521 82149 0 nbsp This arthropod related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Crustaceomorpha amp oldid 1059502035, wikipedia, wiki, book, books, library,

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