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Showing results for tags 'ghost shrimp'.
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Newbie here, to the forum and fossil hunting. I live in the suburbs of Philadelphia, and have a couple spots within an hours drive, however so far have only visited Big Brook on a few different occasions with my family over the past month. Definitely addicted! Thought I would share some of my finds. All are fairly common, but totally amazing to me. Not sure on the ID of a few of them, and some I'm not sure if they are even fossils. I find your mind tries to make something out of nothing, especially with rocks. In any case, thanks for looking, and appreciate in advance any feedback, good or bad! 1979 3 3/4" Boba Fett for scale
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- cretaceous
- new jersey
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I have this Callianassa mortoni claw that I found back in 2018 and I was wondering what this structure is, I haven't seen it preserved on any others.
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What I believe to be a carpus of the major chela of a ghost shrimp. Not an unusual find for me, but this was found near an exposure of Pittsburgh Bluff formation where previously I have only found them in Astoria formation.
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Taxonomy from Fossilworks.org. The state of preservation of Magila is mostly poor, which becomes understandable when you consider that Magila was a burrowing crustacean living in the ground. Therefore, a more calcified carapace was not necessary. Only the exceptionally wide claws are mostly well preserved. These probably also served for digging. Diagnosis from Garassino & Schweigert 2006, p. 22: “Carapace cylindrical laterally flattened; deep cervical groove strongly directed forward; one or two carinae weak in antennal region; rostrum short and edentate; antennal spine well developed; pereiopods I-III chelate; pereiopod I larger and stronger than pereiopods II-III; pereiopods IV-V achelate; uropodal exopod with diaeresis.” Line drawing: References: Garassino, Alessandro & Schweigert, Günter (2006). The Upper Jurassic Solnhofen decapod crustacean fauna review of the types from old descriptions Part I. Infraorders Astacidea, Thalassinidea, and Palinura. Memorie della Societa Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano, Volume XXXIV - Fascicolo I. Schweitzer, C. E., Feldmann, R. M., Garassino, A., Karasawa, H. and Schweigert, G. (2010). Systematic list of fossil decapod crustacean species. Crustaceana Monographs 10:1-222.
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Hi Folks, Ran into this little guy 10 mins into our trip to the brooks yesterday, never seen anything like it. I believe this is a Ghost Shrimp but I could use a second set of eyes on it. Additionally, I'm wondering how I should prep the little guy - I believe 95% of the fossil is an internal mold as the fragile black shell appears to be the top layer with much of it being worn away. As such I don't think I can reveal much more by chipping away at the rock. would love to hear some thoughts Pic: In Field Other views
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- ramanessin brook
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From the album: Cretaceous of Delaware and New Jersey
Ghost Shrimp Claw Big Brook, New Jersey-
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About a month ago, I took advantage of a 3-day weekend to go out to the Peninsula with my brother and came back with a bag full of concretions. Now I'm just trying to work through them. Been getting a lot of duds or incompletes, but here are the last 2 I did. I'm fairly pleased with this claw! I inflicted a lot of damage on it (I use a Dremel 290 which doesn't quite have the feather touch of an air scribe), but it's very complete, and WOW, the color on this one! This one is pretty big, and I like the patterns you can see on it. However, a commonality I'm seeing with these bigger ones is that they always seem to be missing the dactyl, the upper movable portion of the claw. I don't think it's that I'm shaving them off, I would still see them if I were doing that...I think they just tended to detach and float away before the claw had a chance to fossilize. Anyways, that's what I've got to show right now! If they come out nice, I'll post any more that are worth showing. I'm really holding out for a big one that still has the dactyl.
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Prepped another ghost shrimp claw from Twin Beach last night. I think it turned out pretty well. Unfortunately, the glue I used to reattach some of the little bits of exoskeleton left a bit of residue which you can see in the picture, but I don't think it detracts from the piece all that much.
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Hello all, one of ny early 2022 trips has yielded these little beauties. With some help on the IDs a ghost shrimp claw (Mesostylus sp.) And partial Anomoeodus plate.
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Washington State Ghost Shrimp Claws: Defensive and Feeder
Neanderthal Shaman posted a topic in Fossil Preparation
I'm fairly new to fossil preparation. After a trip to the Olympic Peninsula back in November, I had a ton of concretions and no way to see what was inside. At first a tried splitting them with a hammer, but after busting a perfectly good claw into a million pieces, it was clear that I needed some actual preparatory equipment, either an air scribe or a Dremel 290. I went with the 290, and for the last month I've been working through the concretions. Most of them are duds, either empty or just a small piece of exoskeleton at the center. I unearthed a pretty solid looking defensive claw a few weeks ago, and today I finally had another success: a feeder claw! I've inflicted a pretty good number of dings on both claws, but overall I'm happy with them. My most common mistake is flaking the very tips off. Once the surrounding shale is chipped away, they tend to detach very easily. When this happens, they're usually still in a tiny chunk of shale, which I find near impossible to disassociate from the tip. At that point, getting the tips reattached has usually proven to be a lost cause. The species is Callianopsis clallamensis from the late Oligocene of Twin Beach Washington. Defensive claw. Feeder claw. Both claws mounted.- 5 replies
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Combing for Concretions on the Olympic Peninsula
Neanderthal Shaman posted a topic in Fossil Hunting Trips
Hi everybody, Boy, it's been a while since I made a post, but then it's been a while since I did any kind of fossil hunting. A friend of mine who I met while volunteering for a nature center invited me out on a camping trip to the Olympic Peninsula. He claimed to know a couple beaches where the concretion game is really good, and he sure wasn't wrong! The weather was mostly terrible; bitter cold and heavy rain punctuated by occasional blue sky, but when you love beachcombing as much as we do, you forget about it! This is the Pysht Formation at Twin Beach. Lots of concretions were eroded out of it, especially because of the recent storms. Before long we had filled multiple bags up with them. Callianassa ghost shrimp claws are what we were after, and we found one already naturally split open on the beach. My portion of the haul. The ones on the bottom side of the box have that oblong shape that is a good indicator of having claws inside. I did split a round one open with a chisel and hammer only to break a perfectly good claw into a million tiny pieces. My friend is a wiz with the air scribe, so at some point in the near future we're going to spend an afternoon in his garage exposing some of them that way. Those 3 on the bottom I will definitely be saving for his air scribe. I've never used one before, so I'm excited to give it a try. There were some nice fossilized clams littered around the beach. I think these are Lucina. Petrified wood with some Teredo bores. There were some awesome non-fossil finds to be had as well. Lots of small, shiny quartz pieces that I find good for fidgeting with during some of my more boring classes. I was stoked to find this absolutely massive giant acorn barnacle (Balanus nubilus). Apparently it's the biggest species in the entire world. Who knew!- 8 replies
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From the album: Huge Big Brook Fossil Collection
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From the album: Huge Big Brook Fossil Collection
ONLY the brachiopods, ghost shrimp, belemnite phragmacone, crab claws, and snails were collected from big brook-
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Good morning allow me to first say how much I’ve learned from you folks. Admittedly starting from scratch, by reading your posts and then googling words I’m getting a great education. I never knew what concretion or chert or phragmocone meant. I have a long ways to go but I’m learning today’s question is these two photos. They were found in big brook and the longer is one inch long. Chewed up belemnite or ghost shrimp burrow (wouldn’t be porous?) or what?
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Hello, first post, so apologies in advance for any unintended transgressions. I found this one in Big Brook, New Jersey among the plethora of trace fossils usually attributed to shrimp, that are usually disregarded by most hunters here. (I personally find them kind of interesting, and have a lot of fun when I bring them home and tell my wife they are "witch's fingers.") Usually the tube is more rounded and longer and yes, "finger-like." This one is tear shaped and flat on one side. I have seen similar shaped fossils online attributed to insects. There is also an old post here of a similar fossil thought to be the work of a clam. I am just wondering if anyone has another opinion before I slap a label on it and put it back with the other witch's fingers...I mean shrimp burrows. (Sorry not a very exciting first post.) I'm also wondering if there is a more definite classification. I've heard they might be something called a ghost shrimp, which also sounds rather spooky. OK I see missed some info here and sorry for the lack of metric measurements I sometimes forget how primitive we are here (and then I watch the news and it all comes rushing back.) Item is approximately 7.5 CM. Big Brook is a stream located in Colt's Neck Township, Middlesex County, NJ. It's a hot spot for Shark's teeth, mosasaur teeth and an occasional cephalopod part. This was pulled from the river bed itself.
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