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Posts treating: "Junkerberg formation"

Wednesday, 25 March 2015

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Mesopholidostrophia semicircularis brachiopod from Eifel, Germany 

Views of the Mahantango [2015-03-25 08:01:00]  recommend  recommend this post  (221 visits) info

 Devonian; DE,CA,US
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The nacerous shell of Mesopholidostrophia semicircularis is typical of the genera. It can be seen in it's N. America cousins, Pholidostrophia nacera, which are common in the Givetian stage of the middle Devonian. The specimen of M. semicircularis shown below comes from the Eifelian stage (Devonian) of the Junkerberg formation near Gondelsheim, Eifel region, Germany.Specimen #1 Pedicle valveAnteriorBrachial valvePosteriorProfileSpecimen #2Pedicle valveAnteriorPosteriorProfileExamples of  [...]

Athyris concentrica brachiopod from Eifel, Germany 

Views of the Mahantango [2015-03-23 08:01:00]  recommend  recommend this post  (150 visits) info

 Devonian; DE,US
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I have yet another species of Athyris from Germany which makes three compared to the single species that I find here in New York and Pennsylvania.  Athyris concentrica comes from the Devonian, Eifelian stage, aged Junkerberg formation, near Gondelsheim, Eifel, Germany. The shell is generally round with a shallow sulcus and narrow concentric growth lines decorating the surface. This species looks very similar to A. vittata from Michigan.Specimen #1Pedicle valveAnteriorBrachial [...]

Spinatrypa aspera brachiopod from Eifel, Germany 

Views of the Mahantango [2015-03-21 08:01:00]  recommend  recommend this post  (151 visits) info

 Devonian; DE,US,PL,
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Spinatrypa is somewhat common in the lower to middle Devonian of Europe while it is more prevalent in the US during the late middle to upper Devonian. To me this is an indication of the genera originating in Europe and migrating to the US as the continents moved closer during the Devonian. The specimen of Spinatrypa aspera below comes from the Junkerberg formation (Devonian, Eifelian stage), near Gondelsheim, Eifel, Germany. It is a robust, rounded shell with the typical rippled surface that [...]

Primipilaria primipilaris brachiopod from Eifel, Germany 

Views of the Mahantango [2015-03-19 08:01:00]  recommend  recommend this post  (202 visits) info

 Devonian; DE,BE,PL
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I've featured Primipilaria primipilaris on the blog previously as a fossil from the Skaly beds in Poland. Today I have a specimen from the Eifel region of Germany to compliment that earlier specimen. Hailing from the Junkerberg formation near Gondelsheim (SW of Bonn, near the border with Belgium), this brachiopod (when viewed from above of below) has a pointed umbo that grades out to the egdes of the shell in a wide, obtuse angle while the rest of the perimeter is roughly rectangular in shape. [...]

Heliolites coral from Germany 

Views of the Mahantango [2014-04-09 09:01:00]  recommend  recommend this post  (72 visits) info

 Devonian,Silurian; DE,US,SE
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Heliolites is an interesting coral that I thought was confined to the Silurian period, So I was surprised when my friend Nils sent me a specimen from the Devonian of Germany in a recent exchange. The specimen below comes from the Junkerberg Formation (Devonian, Eifelian stage) near Rommersheim, Germany.Previously I've blogged about specimens from the Silurian of Gotland, Sweden and Louisville, Kentucky. A search of the Fossilworks site (formerly Paleodb.org) shows that Heliolites is known up [...]

Pugnax sp. Brachiopod from Germany 

Views of the Mahantango [2014-04-05 09:01:00]  recommend  recommend this post  (111 visits) info

 Devonian; DE,US
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This is a weird looking brachiopod called Pugnax sp. from the Junkerberg Formation (Devonian, Eifelian stage) near Rommersheim, Germany. To me it's odd because it has a very wide sulcus that has it's own plications. Overall the shell is kind of boxy but has a triangular shape in profile.Brachial valveAnteriorPedicle valvePosteriorProfileThis genera is first found in the Devonian and survived up until the end Permian extinction. I have specimens of this genera from the Pennsylvanian of Texas but [...]

Plectorspira ferita brachiopod from Germany 

Views of the Mahantango [2014-04-03 09:01:00]  recommend  recommend this post  (77 visits) info

 Devonian; DE
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Following up on the previous post of Plectospira longirostrus, here is Plectospira ferita. It's from the same location as the other fossils: Junkerberg Formation (Devonian, Eifelian stage) near Rommersheim, Germany.P. ferita is wider than P. longirostris but about the same length with the same zig zag shaped commissure (where the two valves meet in the anterior).Specimen #1Brachial valveAnteriorPedicle valvePosteriorProfileSpecimen #2Brachial valveAnteriorPedicle valvePosteriorThanks to Nils [...]

Plectospira longirostris brachiopod from Germany 

Views of the Mahantango [2014-04-01 09:01:00]  recommend  recommend this post  (68 visits) info

 Devonian; DE,ES
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No Aprils fools trick today, just another brachiopod fossil from Germany. Today it's Plectospira longirostris from the Junkerberg Formation (Devonian, Eifelian stage) near Rommersheim, Germany.Specimen #1Brachial valve Anterior (the shell is a little distorted with the central sulcus exaggerated a bit)Pedicle valvePosteriorProfileSpecimen #2Brachial valveAnteriorPedicle valvePosteriorThis reminds me of some Spanish brachiopods from the Devonian that I posted about a while back: Anathyris [...]

Favosites sp. coral from Germany 

Views of the Mahantango [2014-03-26 08:01:00]  recommend  recommend this post  (59 visits) info

 Devonian; DE
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Here is a specimen of Favosites sp. from the Nims member of the Junkerberg Formation (Devonian, Eifelian stage) near Rommersheim, Germany. It has a variety of calice sizes which kind of reminds me of Favosites argus.Specimen #1 Specimen #2Thanks to Nils for these

Spinocyrtina ostiolata brachiopod from Germany 

Views of the Mahantango [2014-03-24 08:01:00]  recommend  recommend this post  (71 visits) info

 DE,ES
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From the farm fields around Gondelsheim, Germany come these Spinocyrtina ostiolata brachiopods. The fossils come from the Giesdorf mbr. of the Junkerberg Formation and are turned up as the farmers till their fields.Specimen #1 Brachial valve AnteriorPedicle valvePosteriorProfileSpecimen #2 Brachial valveAnteriorPedicle valvePosteriorProfileI don't have any specimens of Spinocyrtina from my collections to compare to these fossils. This is due partly to me learning how to tell them apart from [...]

Quadrithyris macrorhynchia brachiopod from Germany 

Views of the Mahantango [2014-03-14 08:01:00]  recommend  recommend this post  (68 visits) info

 Devonian; DE
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This next brachiopod fossil is a little rough but you can get the general idea of what it looked like. It's Quadrithyris macrorhynchia from the Nims member of the Junkerberg Formation (Devonian, Eifelian stage) near Rommersheim, Germany. It looks a little like an Athyris vittata but compressed between the anterior and posterior ends. There are some very fine growth lines on the surface of the shell that are more obvious in the view of the brachial valve.Pedicle valve AnteriorBrachial [...]

Macgeea bathycalyx coral from Germany 

Views of the Mahantango [2014-03-12 08:01:00]  recommend  recommend this post  (89 visits) info

 Devonian; DE,US
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I really like this coral fossil of Macgeea bathycalyx. It comes from the Nims member of the Junkerberg Formation (Devonian, Eifelian stage) near Rommersheim, Germany. It is an interesting fossil because it looks like a typical rugose coral, with a typical horn shape and cup, but the septae extend on both sides of the cup rather than being confined to the interior. Macgeea bathycalyx is a member of the Phillipsastreidae family of rugose corals and is related to Pachyphyllum sp. corals such as [...]

Leptaena sp. brachiopod from Germany 

Views of the Mahantango [2014-03-08 09:01:00]  recommend  recommend this post  (79 visits) info

 Devonian,Ordovician; DE,US,PL,RU
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Leptaena is a genus of Brachiopod that existed from the Ordovician up into the Carboniferous and it's look didn't change much in all that time. It's no surprise to find this hardy species in lower Devonian (Eifelian stage) rocks from Germany.Specimen #1 Pedicle valve AnteriorBrachial valvePosteriorLeft profileRight profileSpecimen #2Pedicle valveAnteriorRight profileLeft profileThese specimens compare well with those I've blogged about before from the Lower Devonian of Oklahoma, Ordovician of [...]
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