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Showing results for tags 'dipleura dekayi'.
Found 22 results
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From the album: Mahatango Formation
Dipleura dekayi Niss Hollow member -
From the album: Mahantango Formation
Enrolled Dipleura dekayi Schuylkill County, Pennsylvania- 1 comment
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After many fossil hunts at Seven Stars, I finally found a large, prone, almost complete Dipleura dekayi! However, the way the shale split when I chiseled it open, all of the body fossil except the pygidium and a few adjacent segments are on one rock, visible ventrally , but with a thin covering of rock, and the imprint of this covering on the other rock. My original idea was to glue it all back together with field consolidant, then use my dremel tips to prep all the way through the one rock to reveal the trilobite dorsally. However, I am a beginner preparator, and have no assurance (I understand that one can never have assurance that preparation will go well) that everything will work out well, and also the cool textured doublure and the associated hypostome fragment would never be able to be seen again, covered by the rest of the cephalon. Another solution is simply to prep it ventrally, which was not what i was originally what I was going for. Is it possible to prep the cephalon off so that it is removable, so that the underside of it can be visible? Are there any suggestions from seasoned preparators about how I should go about preparing this Dipleura dekayi, which is undoubtedly one of the best specimens in my collection? Thanks for any help in advance; if no clear-cut ideas are given, I may not do anything to it just yet. The main rock, with the impression and the posterior segments: The smaller rock that come off, with the ventrally preserved anterior body with some rock covering it. A 20x magnified view of the doublure and hypostome, showing the striated texture similar to that of unrelated trilobites such as Isotelus, which have been suggested to have been for grading prey on.
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From the album: Mahantango Formation
Dipleura dekayi Schuylkill County, Pennsylvania-
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From the album: Fossildude's Middle Devonian Fossils
Dipleura dekayi partial thorax/pygidium. This would have been a monster - 7 or 8 inches long, at least. Windom Shale Member of the Moscow Formation, Hamilton Group, Middle Devonian (Givetian) Deep Springs Road Quarry, Lebanon, NY.© 2023 Tim Jones
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From the album: Devonian - New York
Dipleura dekayi Moscow Formation Middle Devonian Deep Springs Road, Earlville, NY Self Collected - 2022-
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Hello all, In my investigation of the fauna of the Devonian Mahantango Formation, I have become quite interested in the trilobite Dipleura dekayi. I have not yet had the opportunity to encounter this bug on the field, but it’s size and strange appearance have draw my interest. From the sources that I have read regarding the Mahantango and Hamilton Group formations in Pennsylvania and New York, I have noticed that trilobites with a very similar appearance have been referred to the separate genera Dipleura and Trimerus. In Fossil Collecting in the Mid-Atlantic States, Jasper Burns seems to treat Dipleura and Trimerus as synonyms. However, Wikipedia (I am fully aware this is not the most reliable source) has separate pages for Dipleura dekayi and Trimerus dekayi. I have also heard more references to Trimerus when the specimens are found in the New York area and I vaguely remember a posting on the forum where the question of Dipleura vs. Trimerus was addressed but which post that was has escaped me. Here are the main questions that I have regarding this topic: 1.) Are Trimerus dekayi and Dipleura dekayi different valid trilobite species or are they synonyms? If they are synonyms, which would be the most proper to use? 2.) If Trimerus dekayi and Dipleura dekayi are two different valid species, how can they be differentiated? Does this depend on the region where the specimen was recovered? 3.) Are there other species of Trimerus present in the Mahantango Formation/Hamilton Group and how can they be identified and differentiated from Dipleura? Thank you in advance to all who view and comment on this post. I am very eager to learn more about Mahantango fauna and hopefully it will not be long before I find my first Dipleura/Trimerus in the field.
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From the album: Fossildude's Middle Devonian Fossils
Dipleura dekayi complete prone trilobite juvenile Windom Shale Member of the Moscow Formation, Hamilton Group, Middle Devonian (Givetian) Deep Springs Road Quarry, Lebanon, NY.© 2022 Tim Jones
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Curled Dipleura dekayi sitting on a slab with an enrolled Eldredgeops rana. Apparently, the Eldredgeops was added to this Dipleura to create this "association" piece.
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From the album: A.C.'s Trades/Purchases
Dipleura dekayi (Left) and Eldredgeops rana (Right) Middle Devonian Hamilton Group Skaneateles Formation Madison, NY-
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From the album: A.C.'s Trades/Purchases
Dipleura dekayi (Pygidium) Middle Devonian Hamilton Group Skaneateles Formation Madison, NY -
From the album: A.C.'s Trades/Purchases
Dipleura dekayi Middle Devonian Hamilton Group Skaneateles Formation Madison, NY -
From the album: A.C.'s Trades/Purchases
Dipleura dekayi Middle Devonian Hamilton Group Skaneateles Formation Madison, NY-
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From the album: A.C.'s Trades/Purchases
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From the album: Fossildude's Middle Devonian Fossils
Dipleura dekayi thorax and pygidium. Windom Shale Member of the Moscow Formation, Hamilton Group, Middle Devonian (Givetian) Deep Springs Road Quarry, Lebanon, NY.© © 2022 Tim Jones
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From the album: Fossildude's Middle Devonian Fossils
Dipleura dekayi juvenile. Partially rolled and crushed. Windom Shale Member of the Moscow Formation, Hamilton Group, Middle Devonian (Givetian) Deep Springs Road Quarry, Earlsville, NY. Collected on June 12, 2021.© 2021 Tim Jones
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From the album: Fossildude's Middle Devonian Fossils
Dipleura dekayi partial. Deep Springs Road, Earlville, NY. Collected June 12, 2021 Windom Shale Member of the Moscow Formation, Hamilton Group, Middle Devonian (Givetian)© 2021 Tim Jones ©
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From the album: Fossildude's Middle Devonian Fossils
Dipleura dekayi, cephalon, and thorax/pygidium from separate individuals. Middle Devonian, Moscow Formation, Hamilton Group. Deep Springs Road, Lebanon, NY© © 2014 Tim Jones
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Hey folks, good day. I found two more of the Dipleura dekayi in the same spot as the other smaller cephalon found earlier. These are MUCH larger, I need to find a whole one ! There was also a pygidium (?) and a small eldredgeops cephalon all of these were within 2' of each other. Might be a "hot spot" ! Still a' chippin', one of these days ................. Kind regards,
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Hi group, I think this is another greenops pygidium. If it is, this make a Trilo-Trio, all three species found within inches of one another. The Eldredgeops was peeking out of a natural fracture and looked like it might possibly be more than just a cephalon ..... but, no luck. Only had about ten minutes to look today, hope to get a chance to look more tomorrow. Devonian, Mahantango from eastern WV. Kind regards.
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Hi folks. Unlucky break, I hate it when that happens ! This chunk broke out in a bad way. I'm pretty sure it is a portion of a trilobite cephalon but it doesn't look like the other eldredgeops that I've found here. Not certain which is fwd or rwd, but the taper of the "center section" appears to be in the wrong direction compared to my other specimens. Perhaps it is squashed/deformed a bit ? Something just doesn't look right about it to me. Any clarification would be appreciated. Thanks.
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At first I thought this was a "sheet" of a bryozoan however there are impressions showing through from the other side of something branching (see arrows) which could conceivably be "bones" - turns out this is a trilobite (see the posts below). Another fascinating surprise from our fossil finds...
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