EMP Posted August 13, 2018 Share Posted August 13, 2018 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. 1 Link to comment Share on other sites More sharing options...
EMP Posted August 13, 2018 Author Share Posted August 13, 2018 Image 1: M. mucronatus Image 2: M. mucronatus Image 3: Devonochonetes carinatus Image 4: D. carinatus hash. 1 Link to comment Share on other sites More sharing options...
EMP Posted August 13, 2018 Author Share Posted August 13, 2018 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. 1 Link to comment Share on other sites More sharing options...
EMP Posted August 13, 2018 Author Share Posted August 13, 2018 Image 1: Unidentified productid brachiopod. Image 2: Trilobite thoracic segment, Dipleura dekayi. Image 3: Unidentified trilobite. Image 4: Pygidium of a Eldredgeops rana. 1 Link to comment Share on other sites More sharing options...
Kane Posted August 13, 2018 Share Posted August 13, 2018 Phacops rana is not a valid taxon in the Mahantango. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
EMP Posted August 13, 2018 Author Share Posted August 13, 2018 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. Link to comment Share on other sites More sharing options...
EMP Posted August 13, 2018 Author Share Posted August 13, 2018 2 minutes ago, Kane said: Phacops rana is not a valid taxon in the Mahantango. Old habits die hard I guess. Link to comment Share on other sites More sharing options...
EMP Posted August 13, 2018 Author Share Posted August 13, 2018 Image 1: Mucrospirifer mucronatus. Image 2: M. mucronatus. Image 3: Plate with both a M. mucronatus and a possible ammonoid. 1 Link to comment Share on other sites More sharing options...
EMP Posted August 13, 2018 Author Share Posted August 13, 2018 Also, @piranha do you have any clue as to what the unknown trilobites are? Link to comment Share on other sites More sharing options...
Kane Posted August 13, 2018 Share Posted August 13, 2018 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. 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. 2 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Innocentx Posted August 13, 2018 Share Posted August 13, 2018 Very interesting traces on your unidentified pelecypod. "Journey through a universe ablaze with changes" Phil Ochs Link to comment Share on other sites More sharing options...
Fossildude19 Posted August 13, 2018 Share Posted August 13, 2018 1 hour ago, Innocentx said: Very interesting traces on your unidentified pelecypod. That appears to be Hederella filiformis, a colonial, phoronid-like invertebrate with retractable lophophores. Linsley_1994.pdf 5 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Kane Posted August 14, 2018 Share Posted August 14, 2018 Most common trilobites in the Mahantango are the following: Eldredgeops rana Dipleura delayi Greenops sp. Pseudochenella sp. 1 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Wrangellian Posted August 16, 2018 Share Posted August 16, 2018 I noticed that Hederella too - nice one. Link to comment Share on other sites More sharing options...
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