Alloiteau, 1952, p. 636

Type Species

Trochosmilia archiaci de Fromentel, 1863: 265; Original Designation Alloiteau, 1952: 636

Type Specimen: Neotype; ; Verified; Dry Preserved

Type Locality: Lower Santonian of France (Corbiere, Aude)

The neotype is housed at MNHN (Paris) under R.10964



Solitary, trochoid, compressed, or flabellate. Costosepta compact, arranged in 2 or 3 irregular systems. Marginally granular. Columella lamellar. Endothecal dissepiments abundant. Wall septothecal and septoparathecal. Epithecal wall can be present.


Structurally, Aulosmilia Alloiteau, 1952a, shows great affinities to the genus Placosmilia Milne Edwards and Haime, 1848a. However, it differs in having a septothecal wall and a sparsely developed endotheca with dissepiments mainly restricted to the peripheral region. Furthermore, the main difference between these two genera is in the type of organization of the corallum which is colonial in Placosmilia but solitary in Aulosmilia. However, in young specimens of Placosmilia the colonial appearance may not be distinct. Recent studies on the ontogenetical development of forms of Aulosmilia and Placosmilia carried out by Baron-Szabo (2003) point out the similarities and differences of these two genera.


  • Western Europe, Southern Europe, Central Europe, Eastern Europe; Early Cretaceous - Late Cretaceous
  • East Asia; Early Cretaceous
  • North Africa; Late Cretaceous

This page has been in preparation since 29-Sep-2008 14:21

This version was contributed by Rosemarie Baron-Szabo on 14-Sep-2010 15:07.

Page authors are: Rosemarie Baron-Szabo. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Rosemarie Baron-Szabo

Aulosmilia aspera (Sowerby, 1832), holotype