Ferryia

Fromentel in Ferry, 1870, p. 193

Type Species

Ferryia burgundiae Ferry, 1870, p. 194; Monotypy

Type Specimen: Holotype; MNHN M03099; Verified; Dry Preserved

Type Locality: Bathonian (Tournus; France)

Description

Massive meandroid with straight or sinuous narrow closed series rarely dichotomous in a wide peritheca. Centers distinct. Costae equal, thin, sinuous, finely and regularly dentate. No holotheca. Radial elements are compact costosepta with an incredibly long costal part. Most of septa are free. They are straight or curved, subequal. Distal edge with regular small teeth, inner edge sometimes with palis or paliform lobes, lateral faces finely ornamented with steeply inclined trabeculae (with regard to horizontal). Microstructure unknown. Endotheca made of numerous dissepiments steeply inclined near the edge of the valley passing to the dissepimental part of the peritheca that follow the distal edge of costae. Columella parietal, sublamellar with no linkage between centers in a serie, wall present at the edge of valleys, nature unknown, probably parathecal.

Remarks

See the detailed description in Alloiteau 1957, p. 267-268. One nominal species.

Distribution

• Western Europe; Middle Jurassic

This page has been in preparation since 18-Aug-2009 17:44

This version was contributed by Bernard Lathuilière on 08-Dec-2009 14:21.

Page authors are: Bernard Lathuilière. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Bernard Lathuilière