Diastopora cervicornis Michelin, 1846, p. 241
Jurassic, Bathonian, Ranville, Normandy, France
Type material: MNHN R61247 Michelin Collection
colony erect, bifoliate comprising bifurcating strap-like branches ('adeoniform'), twisted and often abutting older branches
autozooids fixed-walled, the frontal wall short and suroounded by a salient boundary wall; apertures subcircular tending to have a straight or slightly bowed proximal edge, often occluded by a terminal diaphragm
kenozooids may be present at sharp edges of branches, especially in axils, fixed-walled
gonozooids lacking in type material; in putative apparent material, they are fixed-walled, longitudinally ovate with a large, transverse ooeciopore positioned subterminally.
Bidiastopora d'Orbigny, 1849 is usually regarded as a synonym of Multisparsa d'Orbigny, 1853 as their type species - Diastopora lamellosa Michelin, 1846 and Diastopora cervicornis Michelin, 1846, respectively - are thought to be identical, for example, by Walter (1970, p. 64). Despite Bidiastopora having priority, Multisparsa has been more widely used and is the type genus of a family.
Michelin, H. 1841-1848. Iconographie zoophytologique. Bertrand, Paris, 348 pp., 79 pls.
Orbigny, A. d' 1849. A. Description de quelques genres nouveaux de Mollusques bryozoaires. Revue et Magasin de Zoologie Pure et Appliquée (2) 1, 499-504.
Walter, B. 1970. Les bryozoaires jurassiques en France. Documents des Laboratoires de Géologie de la Faculté des Sciences de Lyon 35 [for 1969], 1-328.