Ceramophylla alternatum

Phylum: Bryozoa
Class: Stenolaemata
Order: Cystoporata
Species: Ceramophylla alternatum (James, 1878)

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Includes Constellaria constellatai

History (under Coelolema alternatum, Nickles & Bassler, 1900)

  • 1878 Ceramopora alternata James, Paleontologist, No. 1, p. 5.
  • 1888 Monticulipora (Fistulipora) alternata James and James, Jour. Cincinnati Soc. Nat. Hist., XI, p. 34, pl. i, 5-5b.
  • 1890 Diamesopora vaupeli Ulrich, Geol. Surv. Illinois, VIII, p. 468, pl. xxxix, 3, 3b, pl. xli, 4-4c. Cincinnati (Utica):Cincinnati, Ohio, and vicinity.
  • 1878 Ceramophylla alternation James figures 1, 2, figures 2, 3; Plate 37, plate 38
  • 1878 Ceramopora alternata James, p. 5.
  • 1888 Monticulipora (Fistulipora) alternata James, U. P., p. 34, pi. 1, figs. 5, 5a, 5b.
  • 1890 Diamesopora vaupeli Ulrich, p. 468, pi. 39, figs. 3, 3b; pi. 41, figs. 4, 4c.
  • 1890 Diamesopora vaupeli Nickles and Bassler, 1900, p. 24, 212
  • 1890 Diamesopora vaupeli Bassler, 1953, p. G82.
  • 1893 Diamesopora trentonensis Ulrich, p. 330, pi. 28, fig. 14.
  • 1900 Coeloclema alternatum James, Nickles and Bassler, 1900, p. 212
  • 1954 Coeloclema vaupeli Ulrich, Elias, p. 54.
  • 1968 Ceramophylla vaupeli Ulrich, Utgaard, 1968b, p. 1453, pi. 183, fig. 4
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Stratigraphic Occurrences


Geographic Occurrences

Map point data provided by iDigBio.
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Sequences (Formations)

  • C1 Sequence (Southgate, McMicken)
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Identification in Hand Sample

  • Zoarium Morphology: Bifoliate or encrusting; or hollow ramose
  • Zoecia: Subcircular to circular. Walls thick, boundary jagged or indistinct
  • Mesozooids: Few to absent
  • Monticules: Small, with central cluster of exilazooecia; center sometimes subsolid
  • Maculae: Zooecia in monticules sometimes larger
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McFarlan, (1931):

  • Zooarium of somewhat irregular, hollow, or compressed branches, 2-5 mm in diameter. Maculae absent. Zooecial apertures in more or less diagonal series, about 6 in 2 mm

Karklins (1984):

  • Description: Zoaria dendroid; branches subcylindrical with hollow axial portions, occasionally with conspecific overgrowth. Basal layers moderately thick, imperforate, nonlaminated, indistinctly laminated locally, slightly sinuous. In endozones, autozooecia contiguous, elongated and subrhombic in cross section with slightly curved walls, obscured autozooecial boundaries. In exozones, autozooecia at angles slightly less than 90° to zoarial surface, subelliptical in cross section, partly contiguous, separated by exilazooecia. Autozooecial walls conspicuously thickened at base of exozones, increasing gradually in thickness ontogenetically. Autozooecial wall laminae distinct, relatively thick, abutting or locally intertonguing with lunarial deposits. Autozooecial boundaries generally broadly serrated, locally obscured, occasionally narrowly serrated. Stylelike structures with indistinct cores, exceedingly short, occurring locally in outer exozones of some zoaria, sparse to absent elsewhere. Communication pores very sparse, lacking in most zoaria. Lunarial deposits thin in inner endozones, thickening conspicuously in late endozones, generally of uniform thickness in exozones, commonly distinct at zoarial surfaces, locally with poorly defined cores. Basal diaphragms absent. Autozooecial chambers elliptical to subcircular in cross section. Exilazooecia common, subcircular to elliptical in cross section, commonly elongated at right angles to zoarial surface, subparallel to autozooecia. Occasionally indistinct mesozooecial chamber linings, chambers slightly enlarged at points of origin in early exozones, narrowing ontogenetically, locally terminating at zoarial surface. Maculae common, slightly raised or on level with zoarial surface, generally consisting of indistinctly elongated clusters of mesozooecia; mesozooecia subelliptical to irregularly shaped in cross section, occasionally filled with zooecial skeletal material.

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