Ceramophylla oweni

Phylum: Bryozoa
Class: Stenolaemata
Order: Cystoporata
Genus: Ceramophylla
Species: Ceramophylla oweni (James 1878)

Taxonomic Details

History (under Coeloclema oweni, Nickles & Bassler, 1900)

  • 1884 Fistulipora oweni James, Jour. Cincinnati Soc. Nat. Hist., VII, p. 21, fig. 2-2g.
  • 1888 Monticulipora (Fistulipora) oweni James and James, Jour. Cincinnati Soc. Nat. Hist., XI, p. 34.
  • 1890 Diamesopora oweni Ulrich, Geol. Surv. Illinois, VIII, p. 467.
  • 1896 Monticulipora (Fistulipora) oweni J.F. James, Jour. Cincinnati Soc. Nat. Hist., XVIII, p. 119. Cincinnati (Lorraine): Lebanon, Hamilton, and Cincinnati, Ohio.

Stratigraphic Occurrences


Geographic Occurrences

Map point data provided by iDigBio.

Stratigraphic Description

Sequences (Formations)

  • C4 Sequence (Arnheim)
  • C3 Sequence (Mt. Auburn)
Identification in Hand Sample

  • Zoarium Morphology: Bifoliate or encrusting; or hollow ramose
  • Zoecia: Subcircular to circular. Walls thick, boundary jagged or indistinct
  • Mesozooids: Few
  • Monticules: Small, with central cluster of exilazooecia; center sometimes subsolid
  • Maculae: Zooecia in monticules sometimes larger

Published Description

McFarlan (1931):

  • Zoarium of small hollow contorted stems with prominent lunaria, giving the surface a rough appearance. In tangential section the lunarium is semicircular with its ends indenting the zooecial apertures.
  • A characteristic species of the Mt. Auburn of the Cincinnati region.

Bassler (1906):

  • The hollow, contorted or utricular stems of this form are so different in growth alone from the other species of the genus that its identification is quite easy. The figures of the type specimen given by James are sufficient for the recognition of the species, but one of its most marked characteristics – an unusually prominent lunarium – has not been pointed out by its author. The lunaria are so strongly developed and sharply raised that the zoarial surface is fairly roughened by them. The lunarium is shown exceptionally well in tangential sections where the zooecia are seen to be so indented with it as to be bilobed. In shape the lunarium is semicircular with the ends pinched slightly together. The other internal characters are essentially the same as in the remaining species of Coeloclema.