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Other trilobites I have found in the wheeler. Asaphiscus wheeleri Only one complete with impression. Lots of fragments. Note the huge, broad pygidium.
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Here is a few highlights from a brief stop at the old BLM trilobite quarry at the Wheeler Amphitheater. I was passing through the area for work and had to try my hand at the "defunct" site.
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From the album: Wheeler Formation
One of nicest Elrathia specimens from my expedition out west! -
From the album: Wheeler Formation
One of my favorite finds from the Wheeler. -
From the album: Wheeler Formation
Beautiful color on this one. Photographed wet. -
Menagerie multi plate - Asaphiscus, Elrathia, Bolaspidella + Agnostids!
cameronsfossilcollection posted a gallery image in Member Collections
From the album: Wheeler Formation
This was carefully prepped out with serendipitous results, as the main attraction was always the Asaphiscus. -
From the album: Wheeler Formation
Closeup of the Asaphiscus. -
From the album: Wheeler Formation
Look at that spine! -
From the album: Wheeler Formation
There are actually four bugs on this decent sized plate! -
From the album: Wheeler Formation
This bug was either thrown into an unnatural position during the burial process or is an uncommon example of enrollment in Cambrian trilobites! -
From the album: Wheeler Formation
Puny bug! -
From the album: Wheeler Formation
Here’s a closeup of that tiny cranidium. Jon is a master prep! -
From the album: Wheeler Formation
Nice reddish brown bug! -
From the album: Wheeler Formation
Beautiful dark red Elrathia molt. That small dot to the left of the bug is a cranidium belonging to a member of the same species! -
From the album: Wheeler Formation
Beautiful, large molt with a tinge of green. -
From the album: Wheeler Formation
Two cheekless red molts on a beautiful algae covered matrix. -
From the album: Wheeler Formation
Unsurprisingly thought this was an Elrathia when I found it. -
From the album: Wheeler Formation
Cheekless red Elrathia molt on a beautiful piece of rock. -
From the album: Wheeler Formation
Typical preservation without either of the helens nor the operculum. -
I would like to show you all some items I have termed "elongates", so as not to hint as to what they may be. They could be a number of things, but they all form elongated strips. I have grouped them into several different types, based on structure. Interestingly, some of these combine different structures or all of the above, so these may all be the same kind of thing. Some of them extend short, and some of them are very long, taking all kinds of twists and turns. They all show the same structural features whether they are almost microscopic (taken at 250x) or quite visible to the naked eye (taken at 40 or 50x). Each square shown in the scales is 5mm x 5mm. The difference in structural types could be due to weathering down from complex to simple. They could be tracks, feeding tracks or parts of burrows. They could be cruziana, though I have never found anything resembling the "cruziana" I have seen described in numerous illustrations and photos labeled as such. One would think there would be such things in the Wheeler Formation, what with all the trilobites and other fauna there. In the renderings I have seen, cruziana look like TWO of the circular elongates, directly side-by-side, not single strips that I see. First, we have the circular elongates. They look as if something had been feeding in a circular pattern, but all along moving in one direction while doing so. Check out rhizocorallium.
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Taking a break from my many projects to do a bit of planning/research for my 2021 Utah excursion, putting together my "preop brief" Kept stumbling on references to Bathyocos housensis. Its a "new" genus and the species description only has very nice stereo images of the cranidium. Looks like all the paratype specimens are also just glabella-centric cranidia as per SUNDBERG, F.A. 1994. Corynexochida and Ptychopariida (Trilobita, Arthropoda) of the Ehmaniella Biozone (Middle Cambrian), Utah and Nevada. Contributions in Science from the Natural History Everyone else seems to just regurgitate the same cut and paste mention from Jell, P.A. & Adrain, J.M. Available generic names for trilobites. which is just a mention of Sundberg 94. Was just curious if anyone has or had seen any images or reconstructions of this curious little bug. Looks like its a Drum, Wheeler, and Snake Range critter.
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Trade for any unprepped flora or fauna fossils
Paleome posted a topic in Member-to-Member Fossil Trades
I have Elrathia kingii, Itagnostus interstrictus, and Acrothele subsidua. Also, rare rock and mineral from California, eclogite and benitoite..
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I have come across, for sale, a pyritized agnostid trilobite from the Wheeler Shale. I was curious if anyone had seen these before, and if so, how susceptible were they to pyrite disease? It's quite a nice specimen but I don't want to waste money if it's guaranteed to rot in a year or two.
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I have always been quite fascinated with the early stages of development of life on Earth. My interest really picked up when I first discovered the Ediacaran biota, and who can blame me. Those creatures are so enigmatic and fascinating. I was able to pick up a few specimens, but quickly realized that my desire for fossils greatly outweighed the supply and cost of Ediacaran fossils, and I soon discovered the equally fascinating and enigmatic Lower Cambrian Chengjiang biota. I was, and still am, blown away at the quality of preservation of these soft bodied critters. A lot of specimens come very shoddily or incompletely prepared, and while it's been a steep learning curve, I feel that I'm starting to get the hang of prepping them. I've decided to start posting my latest acquisitions as these fossils are too amazing not to share. First up is Cricocosmia jinningensis, a fairly common palaeoscolecid worm from the Chengjiang biota. I have several specimens but this one is the best. It came partially prepped and I am just now satisfied with the result. You can see remnants of the gut preserved as darker regions in the center of the body. Next up is a small hash plate of Bohemiella romingeri brachiopods from the Middle Cambrian of the Czech Republic. Not my usual purchase, but I felt the specimen was too beautiful to pass up.
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As promised (quite a while ago, I'm sorry!) Here are photos and prep notes Start - scope is a low power model, x10 and x30. I do most of my work on x30. The needles I scrape with are in pin vises, available at most hobby stores and online. I find sewing machine needles are thicker and stronger, and work well. I do sharpen them with my wet stone when they get dull! (Be careful, it is very easy to have adjusted to using a dull needle for the past hour, sharpen it up nicely, and then press to hard, damaging the fossil!) The tuna can is for rock dust and pieces, they go to the compost pile. I heat the fossils on low heat for 5 minutes. I try to get them just hot enough that I can still touch them. I think this drives out the water, but I know from experience that it makes the fossils harder and stronger. At least in Wheeler shale. I do this at the start, every time I wash the fossils, and if I take a break longer than a week. The next step is to flip the fossil over and use my utility knife to scrap/grind off any high spots on the back. It is important that the fossil not rock back and forth while I am working on it. 1 - This is looking like a Brachyaspidion microps, Swazey Springs is thick with them! Despite the nice shield of matrix that covered the trilobite the spine at the top rear of the Cephalon has been lost. Oh well. The rest of the fossil looks to be in nice shape. I am leaving the matrix on the axial rings for last as it protects the small spines that sometimes are there. It will be the last part I clean for that reason. Note the "good" and "bad" pictures. It is always best to work with the needle pointing away from the fossil. Sometimes this is not possible, but I try to do as much work "away" as I can. I try to clean the whole fossil a little each pass, rather then trying to clean one area completely. If you are wondering what the half circle is on prep 1, I mark all my finds in the field with a circle around the fossil and an "x" on the back. It makes them much easier to find if I drop one or forget exactly where I set it down! 2 - While clearly an Agnostid trilobite I am not yet ready to id it in any way. I did not realize it till I started working but the shell has exfoliated on the parts that are exposed. Normally I would work a few areas hard to id the fossil, and toss it (OK, mostly likely it would go into a box I donate to a local school), but as I started on this little project I will finish it. 3 - It was just too weathered! I broke this one in half after about 5 minutes of work. I tried to glue it back together, but that did not work. All told I put about 30 minutes into each of the fossils that survived. I see from the picture I need to do a little more work on the Brachy!
