Specimen of Xenoleberis yamadai with left valve removed, from Siveter et al. (2003).

Belongs within: Ostracoda.

The Myodocopida are a group of ostracods that first appeared in the Silurian (Benson et al. 1961).

Characters (from Benson et al. 1961, as Cypridinacea): Carapace usually calcified, strongly in some; rostrum downcurved usually below line of dorsal border, overhanging an anterior incisure or gape through which antennae of living animal protrude. Specialised hinge structure may be developed or lacking, but, if present, rarely consists of more than terminal teeth in right valve, with long narrow smooth groove between and corresponding elements in left valve.

<==Myodocopida SS03 [Myodocopina MD01]
    |--Cypridina BK77 [Cypridinidae, Cypridinoidea MD01]
    |    `--C. globosa BK77
    |--Cylindroleberididae [Cylindroleberidoidea] MD01
    |    |--Xenoleberis yamadai SS03
    |    `--Colymbosathon Siveter, Sutton et al. 2003 SS03
    |         `--*C. ecplecticos Siveter, Sutton et al. 2003 SS03
    `--Sarsielloidea MD01
         |--Philomedidae MD01
         |--Rutidermatidae MD01
         `--Sarsiellidae MD01

*Type species of generic name indicated


[BK77] Barel, C. D. N., & P. G. N. Kramers. 1977. A survey of the echinoderm associates of the north-east Atlantic area. Zoologische Verhandelingen 156: 1-159.

Benson, R. H., J. M. Berdan et al. 1961. Systematic descriptions. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q99-Q421. Geological Society of America and University of Kansas Press.

[MD01] Martin, J. W., & G. E. Davis. 2001. An updated classification of the Recent Crustacea. Natural History Museum Los Angeles County, Science Series 39: 1-124.

[SS03] Siveter, D. J., M. D. Sutton, D. E. G. Briggs & D. J. Siveter. 2003. An ostracode crustacean with soft parts from the Lower Silurian. Science 302: 1749-1751.

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