Cedaria

Cedaria
Temporal range: Dresbachian
↓
Cedaria minor, 11 mm
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Ptychopariina
Superfamily:
Ptychoparioidea
Family:
Cedariidae
Genus:
Cedaria

Walcott, 1924
species
  • C. prolifica Walcott, 1924 (type species)[1]
  • C. bella Lochman & Hu, 1962
  • C. brevifrons Palmer, 1960
  • C. cajonensis Rusconi, 1958
  • C. eurycheilos Palmer, 1954
  • C. gaspensis Rasetti, 1946
  • C. milleri Resser, 1937
  • C. minor (Walcott, 1916) = Asaphiscus minor
  • C. nixonia Lochman & Duncan, 1944
  • C. tennesseensis Walcott, 1925
  • C. tumicephala Robison, 1988

Cedaria is an extinct genus of trilobites from the late Cambrian.

It is a small, rather flat trilobite with an oval outline, a headshield and tailshield of approximately the same size, 7 articulating segments in the middle part of the body and spines at the back edges of the headshield that reach half the length of the body. Cedaria lived during the early part of the Upper Cambrian (Dresbachian), and is especially abundant in the Weeks Formation.[2]

  1. ^ Palmer, A.R. (1960). "Glyptagnostus and associated trilobites in the United States". Geological Survey Professional Paper. 374: F1–F49.
  2. ^ Peters, S.E. (2003). "Paleontology and taphonomy of the Upper Weeks Formation (Cambrian, Upper Marjuman, Cedaria Zone) of western Utah" (PDF). Unpublished PhD dissertation. University of Chicago.