Geobulletin alpha

Source info:

Author:	Dave
Date:	2015-03-31 09:01:00
Blog:	Views of the Mahantango
URL:	http://viewsofthemahantango.blogspot.com/2015/03/postepithyris-cincta-brachiopod-from.html

Summary:

I always like large brachiopods and these specimens of Postepithryis cincta certainly meet that standard. The specimens below are roughly 1.5" long (4cm) by 1.25" wide (3cm). They come from rocks dated to the Oxfordian stage (Jurassic) near Bourges in the department of Cher, France.P. cincta is a Terebratulid type brachiopod, oval shaped and with a large foramen (round hole) in the umbo (beak like extension of the shell) where the pedicle muscle once extended. The only other distinguishing feature is the gentle, sine wave like shape to the anterior margin where the two shell halves meet.Specimen #1Pedicle valveAnteriorBrachial valvePosteriorProfileSpecimen #2Pedicle valveAnteriorBrachial valvePosteriorProfileThanks to Gery for these fossils!

Content analysis:

Stratigraphic context:

Recognized stratigraphic terms [n]:	Oxfordian [1]
Agenames chronostratigraphy [rating]:	Oxfordian [0.1] Upper Jurassic [0.1] Jurassic [0.1] Mesozoic [0.1] Phanerozoic [0.1]

Geographic context:

Location	Country	Latitude	Longitude
France	FR	46.7107	1.71819

Keywords:

anterior margin, Bourges, Cher, department, distinguishing feature, fossils, France.P. cincta, Gery, Jurassic, large brachiopods, large foramen, Oxfordian stage, pedicle muscle, Postepithryis cincta, Postepithyris cincta brachiopod, rocks, shape, shell halves, sine wave, specimens, standard, Terebratulid type brachiopod, valveAnteriorBrachial valvePosteriorProfileSpecimen, valveAnteriorBrachial valvePosteriorProfileThanks