Holcodiscus caillaudianus (d'Orbigny, 1850)

Remarks

• Collector:    Emmanuel Pénagé

• Formation:  Late Early Barremian rocks (Section #062)

• Location:     Vallon de Saint Martin, Escragnolles, Alpes Maritimes (06), France

General Info

Synonymy

• 1850 Ammonites caillaudianus d'Orbigny

• 1889 Ammonites caillaudianus d'Orbigny; Kilian

• 1995 Holcodiscus cf. caillaudianus (d'Orbigny); Company; Sandoval & Tavera

• 1996 Holcodiscus caillaudianus (d'Orbigny); Wright, Callomon and Howarth

Stratigraphic Occurrence

• Lower Barremian rocks of France

• Lower Barremian rocks of Southern Spain

Age

• The genus Holcodiscus ranges from about the Subpulchellia nicklesi (Hyatt) zone of the early Barremian Stage into the 'Ancyloceras' vandenheckii Astier zone, late Barremian Stage (~123–120 mya).

Geographic Occurrence (not an all-inclusive list)

• France

• Southern Spain

Remarks

For identification, and discussions on the ranges of several species of Holcodiscus, see:

• Company, M.; Sandoval, J.; Tavera, J. M.  1995.  Lower Barremian Ammonite Biostratigraphy in the Subbetic Domain (Betic Cordillera, Southern Spain).  Cretaceous Research 16, 243–256.

• Wright, C. W.; Calloman, J. H.; Howarth, M. K. (Moore, R. C., ed).  1996.  Treatise on Invertebrate Paleontology, Part L-Mollusca 4, Revised (Cretaceous Ammonoidea).  Lawrence:  Geological Society of America and University of Kansas Press, 48; fig 35, 4a-b.