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EMP

Part three to my safekeeping series. These are some of my finds from the middle Devonian Mahantango Formation of Maryland. Unlike the other formations I posted about, this one is pretty well known for it's fossil contents, so I will keep the introduction and background brief. For those who don't know the Mahantango is a middle Devonian aged marine shale that's part of the Hamilton Group in Maryland. For the most part it's fauna is dominated by brachiopods, but occasional gastropods, tentaculitids, and other animals show up as well. It was deposited in a shallow inland sea with the depth of the sea varying over time. This is only a small fraction of what I have, but it's some of the best. 

 

Image 1: Spiriferid brachiopod, Mucrospirifer mucronatus

 

Image 2: Some odd fragment (possibly trilobite related?) with a M. mucronatus. 

 

Image 3: M. mucronatus. 

mahantango 3.jpg

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EMP

Image 1: M. mucronatus

 

Image 2: M. mucronatus

 

Image 3: Devonochonetes carinatus

 

Image 4: D. carinatus hash. 

 

mahantango 12.jpg

mahantango 15.jpg

mahantango 4.jpg

mahantango 14.jpg

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EMP

Image 1: Cephalopod, Michelinoceras (?) sp. 

 

Image 2: Unidentified pelycopod (if anyone has any IDs for these please feel free to respond below, I'm not good at identifying pelycopods). 

 

Image 3: Unidentified pelycopod. 

 

Image 4: Unidentified crinoid. Note the stalk, "head," and part of an arm. 

 

 

 

 

mahantango 13.jpg

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mahantango 7.jpg

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EMP

Image 1: Unidentified productid brachiopod.

 

Image 2: Trilobite thoracic segment, Dipleura dekayi. 

 

Image 3: Unidentified trilobite. 

 

Image 4: Pygidium of a Eldredgeops rana. 

mahantango 2.jpg

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mahantango 1.jpg

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Kane

Phacops rana is not a valid taxon in the Mahantango. ;) 

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EMP

And of course now my other photos decide to load. 

 

Image 1: Unidentified trilobite. 

 

Image 2: Bembexia (?) sp. gastropod. 

 

Image 3: Gastropod, Bembexia (?) sp.

 

Image 4: Hash of Devonochonetes carinatus. 

 

 

 

mahantango 22.jpg

mahantango 21.jpg

mahantango 19.jpg

mahantango 20.jpg

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EMP
2 minutes ago, Kane said:

Phacops rana is not a valid taxon in the Mahantango. ;) 

 

Old habits die hard I guess. 

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EMP

Image 1: Mucrospirifer mucronatus. 

 

Image 2: M. mucronatus.

 

Image 3: Plate with both a M. mucronatus and a possible ammonoid. 

mahantango 16.jpg

mahantango 18.jpg

mahantango 17.jpg

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EMP

Also, @piranha do you have any clue as to what the unknown trilobites are? 

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Kane
3 minutes ago, EMP said:

 

Old habits die hard I guess. 

Being corrected a number of times is a good way to break a bad habit. :D 

 

For some of the gastropod and brachiopod species you are uncertain about, I'll tag @Shamalama and @Jeffrey P who have collected quite a bit in this formation. 

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Innocentx

Very interesting traces on your unidentified pelecypod.

5b719ea6b56ae_mahantango9.jpg.cf53a4cd8cd53b8c812460f8d78e39ca.jpg

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Kane

Most common trilobites in the Mahantango are the following:

 

Eldredgeops rana

Dipleura delayi

Greenops sp.

Pseudochenella sp.

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Wrangellian

I noticed that Hederella too - nice one.

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