Cellulipora ornata d'Orbigny, 1849, p. 500
Cretaceous, Cenomanian, Cap de la Hève, Seine-Maritime, France
Type material: MNHN R61665, d'Orbigny Collection (ex 6604); designated as the neotype by Buge & Voigt (1972, p. 126)
colony encrusting, large and massive, hollow if growing
around a perished cylindrical substratum, multilamellar,
composed of numerous polygonal subcolonies each growing
centrifugally and united at their edges with adjacent
subcolonies to form a single layer of the colony; a band
of open kenozooids developed at boundary between subcolonies
autozooids probably fixed-walled, with short frontal
walls containing a peculiar raised perforated plate but
otherwise without apparent pseudopores; apertures longitudinally
elliptical, large, closely-spaced, sometimes closed by
kenozooids free-walled, subcircular, thick-walled, present
in a band where subcolonies anastomose
gonozooid fixed-walled, large, crescent-shaped, the inflated
frontal wall surrounding a few autozooidal apertures
This is an extremely distinctive bryozoan, characterised by its large colonies with clearly-defined polygonal subcolonies that superficially resemble the corallites of a colonial coral. Indeed, coarsely silicified colonies from the British Albian are routinely mistaken for corals. New subcolonies originate from the centres of existing subcolonies by eruptive budding through intrazooecial fission.
Buge & Voigt (1972) redescribed Cellulipora, attributing to the several other species ranging from Hauterivian to ?Coniacian.
Buge, E. & Voigt, E. 1972. Les Cellulipora (Bryozoa, Cyclostomata) du Cénomanien Français et la famille des Celluliporidae. Geobios 5: 121-150.
Orbigny, A. d' 1849. A. dÕOrbigny, Description de quelques genres nouveaux de Mollusques bryozoaires. Revue et Magasin de Zoologie Pure et Appliquée (2) 1, 499-504.
Orbigny, A. d' 1851-1854. Paléontologie Française, Terrains Crétacé, 5, Bryozoaires. Masson, Paris, 1192 pp, pls 600-800.