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Spinatrypa aspera brachiopod from Eifel, Germany
Source info:
| Author: | Dave |
|---|---|
| Date: | 2015-03-21 08:01:00 |
| Blog: | Views of the Mahantango  |
| URL: | http://viewsofthemahantango.blogspot.com/2015/03/spinatrypa-aspera-brachiopod-from-eifel.html |
Summary:
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 one expects.Specimen #1Brachial valveProfilePedicle valvePosteriorProfileSpecimen #2Brachial valveAnteriorPedicle valvePosteriorProfileI have plenty of other examples of this genera including S. aspera from Poland (of which I am having doubts my specimens are labelled correctly), S. spinoa from the Windom shale of New York (with and without spines preserved) as well as and S. rockfordensis from Iowa.Content analysis:
Stratigraphic context:
| Recognized stratigraphic terms [n]: | Devonian [4] Eifelian [1] |
|---|---|
| Agenames chronostratigraphy [rating]: | Devonian [0.7] Paleozoic [0.7] Phanerozoic [0.7] Eifelian [0.1] Middle Devonian [0.1] |
Geographic context:
| Location | Country | Latitude | Longitude |
|---|---|---|---|
| Europe | 52.9762 | 7.85784 | |
| Germany | DE | 51.1642 | 10.4542 |
| Gondelsheim | DE | 49.0596 | 8.65582 |
| Iowa | US | 41.9383 | -93.3899 |
| Poland | PL | 51.9189 | 19.1343 |
| United States | US | 37.1679 | -95.845 |
| Windom | US | 42.7853 | -78.7897 |
Keywords:
1Brachial valveProfilePedicle valvePosteriorProfileSpecimen, 2Brachial valveAnteriorPedicle valvePosteriorProfileI, Brachiopod, comes, continents, doubts, Eifelian stage, Europe, examples, genera, Germany Spinatrypa, indication, Junkerberg formation, late middle, New York, plenty, Poland, rounded shell, S. aspera, S. rockfordensis, S. spinoa, specimens, Spinatrypa aspera brachiopod, spines, typical rippled surface, upper Devonian, Windom shale
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