Showing posts with label Taboumakhlouf Formation. Show all posts
Showing posts with label Taboumakhlouf Formation. Show all posts

Saturday, April 18, 2015

Rhipidomella sp. brachiopod from Morocco

I've received some new brachiopod specimens from Morocco recently and this Rhipidomella sp. is one of them. It's a large, rounded shell with fine radial ribbing on the surface. The pedicle valve is a bit more convex than the brachial valve. The specimen comes from El Mrakib near Alnif in Morocco. I don't have specifics as to the formation (I suspect the Taboumakhlouf Formation) but the local rocks in which it was found are Emsian to Givetian in age (Devonian). I have not yet been able to locate any literature which details this genera from Morocco so at this time I cannot give it a species name.

Brachial valve
Anterior
Pedicle valve
Posterior
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Thursday, April 16, 2015

Devonogypa spinulosa brachiopod from Morocco

I've received some new brachiopod specimens from Morocco recently and this Gypidulid is one of them. The shell is about as wide as it is long with very unequal valves. The pedicle valve is very convex and curved while the brachial valve is only slightly convex. There is no sulcus in the shell and it is smooth except for some very fine concentric growth lines. I believe this should be called Devonogypa spinulosa after reading the paper, Middle Devonian brachiopods from the southern Maïder (eastern Anti- Atlas, Morocco). Halamski, A.T. and Baliński, A., 2013. Annales Societatis Geologorum Poloniae, 83: 243–307 since it seems to match both the description and the specimens illustrated in the plates.  Within the paper the authors refer to this species as coming from outcrops of the Taboumakhlouf Formation (Devonian, Eifelian to Givetian stage) on El Mrakib (a mountain near Alnif) and the specimens I received came from there as well.

Brachial valve (note the spirorbis epibiont on the surface)
Anterior
Pedicle valve
Posterior
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