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Hi there... Elliot here. Could someone name some species of brachiopods please that became extinct during mass extinction event's. As I'm struggling to find any references. Thank you very much. Elliot.

Brachiopods (+ one gastropod) replaced with flint. A find from the water of a stream. Quaternary moraine deposits containing carboniferous rocks. August 2021

Over a couple of trips to several exposures of the Late Pennsylvanian Colony Creek Shale, I have collected a few larger brachiopods that I am not completely sure of an identification for. I was hoping that someone might know what these are. Any help would be greatly appreciated. Thank you so much! #1- ??? #2- ??? #3- Antiquatonia portlockiana? #4- Kutorginella lasallensis?

Hey! I'd like some help with some recurring Cotswold brachiopods. Great Oolite group; Middle Jurassic (Bajocian - Callovian). I've grouped them into 4 or 5 species / clades, based on their morphology. Species A - strongly ribbed, crystalline calcite. The specimen in my profile picture! (obviously not a good picture, included to show the great size range) A huge one! Predated upon: Species B: calcite, very spherical, non-ribbed but prominent growth lines Species C: almost completely spherical, unknown mineral, no ribs Species D: small, typically crushed, very flat, no ribs Species E: only a single valve found, very prominent growth lines. is either a bivalve, but it could be part of species B (more prep needed); the shape holds the exact same shape as the upper valve of the other species B items. That's all! @Tidgy's Dad, wanna have a crack? I know you've hunted here before!

Hi guys (specifically @Tidgy's Dad ) I was wondering what your thoughts on these brachiopods were 1. 2.

While doing security rounds at work, I stumbled across a nice slab chocked full of brachiopods, tucked in dock-side rip-rap from Northern Michigan. It's pretty dark outside, so the pictures aren't the best, but I do see several types in it. Better pictures will follow once I get it home.

Hey guys! I'm new to the forum and have something neat to share that came from Hockley Valley Ontario. I found a descent sized piece of what I believe is fossiliferous limestone. This was in a clearing on my property near Hockley Village! I had posted it on mindat.org which some kind people had directed me here to help further identify the fossils in it and maybe learn more about this specimen. We deduced that it was likely limestone but with some hard silica in it as it was able to mark glass. The rocks dimensions are 17 × 12.5 × 4.3cm and it weighs roughly a pound (I don't have a precise scale). That last picture shows translucency within some of the fossils when lit. Pretty incredible could there perhaps be mineralization happening here? I can disclose any specific fossils' dimensions if required but the largest is 3.5cm long and also my favorite on the piece. It is the one with a one inch nail in its picture. I'm looking forward to learning more about this beauty!

Hi everyone this is Matt again. Today in the creek I found this rock I broke apart and it was loaded with all kinds of brachiopods. Photos:

Spent a few hours earlier today fossil hunting Ordovician strata in the Jefferson National Forest near New Castle, Virginia in Craig County for the first time. Was well rewarded with several plates covered in brachiopod compression fossils. Also found what I think is some sort of burrow. Also found an odd fossil that I can’t identify, I will post it in the ID forum later with a higher resolution microscope pic and a scale, but for now I will post what I have..

The weather was promising, the husband wanted a good place to hike, and the dog had cabin fever. So I loaded them, along with my gear, into the truck and drove down to Crystal Lake to hunt around in the Madison limestone while the husband and the dog went for a romp in the Big Snowy Mountains. On the dirt road to the area, we drove past a mama black bear and her cub, hanging out only about 30 feet from the road. To avoid aggravating either, we didn't slow down to take pictures, but my husband was pretty "bear"-anoid about running into them again Well, the mountains weren't snowy and the lake wasn't much of a lake, but the weather was great and the shoreline looked promising, so I set off to start combing through the countless dead snail shells to find myself some brachiopods. Most of the shoreline was water-worn limestone chunks, but the outcrops of layered stone jutting from the shore harbored some wonderful fossils. My first find of the day! Can you spot it? After my first little brach, I started seeing a lot of crinoid and coral hash plates. This plate was several feet across and still half-buried. I had been finding some nice little brachiopods that I suspected were some sort of spirifer, and decided to start splitting some limestone to see what else I might be able to find. After a few hours, the husband and dog came back and started smothering me with their boredom. So, in an attempt to appease them, and perhaps scout out another good spot or two, we started off on the trail that circled the lake. There wasn't much in the way of good exposures, but the dog ran most of her energy out on the little trail. We picked along the opposite shore on the way back to the truck, finding a few more small brachs and crinoid bits, but I didn't want to go home yet. I talked my husband into letting me stop at a few roadcuts on the way back to the highway, and he agreed as long as he could nap in the truck while I hunted. Perfect: now I don't have to entertain him. The dog was pretty pooped out too, so it was a nice stress-free hunt-and-peck down Crystal Lake Road. Until my angry bowels could not hold out any longer. We swung over to Cascade Falls Trailhead to use the outhouse, and there was a tiny little exposure near the parking area of the trailhead. I couldn't help it. I had to check it out. A whitetail doe hanging out on the right side of the hill played peek-a-boo with me as I scoured the well-split limestone. My last find of the day is probably my most favorite. After researching these a bit more, I believe these are a type of Cyrtospirifer, lower Mississippian and common in this area. I believe that there are at least two different species present in this plate and need to do some more research to find the species of each. I believe I found the impression of a Schizophoria on this piece. Bryozoa? I have a fair bit of homework to do, and as always, I am extremely happy with my finds. Thanks for stopping by; have a great day!

Hello all, and thanks for being here! I am looking for an ID on these fossils for my own gratification! My focus is in archaeology, so I come across fossils often during surface collection adventures! A little about the location: These were found in Nancy, Kentucky, USA on a partially man made flood-control lake called Lake Cumberland (Cumberland river basin/Cumberland plateau). The banks are rich with small to medium chert concretions, fossiliferous sedimentary stones, and small to medium iron inclusions. Preservation of these specimens are, generally, fair to good. I found this piece along with horn corals, only a couple of brachiopods, and a wealth of crinoid stem pieces in less than 20 minutes! I thank you all in advance for any information you can give me! -Skelly B. Specimen 1- Specimen 2 - Specimen 3 -

Today I took a trip to a new outcrop of the Leighton Formation! My main interest in this new outcrop is to find the source of my original material. The first outcrop I visited actually turned out to be an erratic. When I first visited there in February the ground was completely frozen. I found a large piece of shale sticking out of the ground, which I proceeded to split, but the rock itself did not come out. This rock yielded about 50 pounds of material on the first trip. When I returned in June I excavated around the supposed outcrop, and found that it was in a fact an erratic rock. I also found three other large pieces that were also from the Leighton Formation. Since my first site turned out to be a dud, I am now trying to find new sites. This is the first of three possibly accessible sites to visit. I am mainly looking for the presence of thelodont scales - specifically, those that belong to the species Phlebolepis elegans. I am also looking for a few species that I don't have in my collection yet or I require for research: the tentaculite species T. elongatus, the trilobite species Acastae zerinae, two species in the genus Actinopteria, the undescribed Calymene species that has been mentioned in earlier posts, and eurypterid fragments. Today was an absolutely beautiful day to do it. It was cool and overcast in the morning, but then cleared up towards the end of the trip - perfect collecting conditions. Here are some pictures of the walk (in chronological order). Once at the outcrop, the Leighton shale member was quite obvious. It was one excellent outcrop, although I didn't find all the species I was looking for. I might have found thelodont scales, but I will not know for certain until I examine the material closely. The fauna of this formation was similar to that in the erratics I found, with a few marked differences. One is the abundance of the brachiopod species Chonetes bastini, it was the by far most common brachiopod. Also, the characteristic Salopina brachiopod fauna was barely represented in this outcrop - I might have got two specimens of them. Camarotoeichia leightoni was more common, but still relatively scarce compared to the C. bastini. Only the tentaculite species T. elongatus was in the outcrop, the other species of Tentaculite (which I have not identified), was completely absent. The bivalve species Modiolopsis leightoni was amazingly prolific. On to the geology of the site. Almost the entire outcrop was of made of a highly fractured gray shale that split extremely easily. In this slate, there were occasional pockets of a type of siltstone. The siltstone pockets usually contained a large amount of gastropods of the genus Australonema, with possible fish fragments. There were extremely fossiliferous layers every 5 - 10 centimeters. In between these layers there were still some fossils, but generally there were less molluscs or ostracods. Most of the C. bastini brachiopods were in between the fossiliferous layers. I only collected from one of the outcrops that was there, two others were situated to the left and right of this one. They had the same general geology and fauna - at least, according to my rather quick check. Below are a few pictures of the outcrop I collected at: the first is from the front of it, and the second is from behind it. Here are a few insitu photos of some of the fossils. The first is of what I guess is an A. zerinae trilobite cephalon, prep will reveal if it actually is. The second is of one of the highly fossiliferous layers I was talking about - notice the enormous profusion of ostracods, with a few brachiopods and mollusks. On the way back there were a few red shale pieces I took a look at. I think they are from the Hersey Formation, probably brought in by the tidal current. The first picture shows one of the rocks, and the second is of a brachiopod external mold peeking out. I hope to update this thread with further pictures of the fossils collected. To be continued.... Thanks for reading!

After seeing @connorp Fossil of the month entry that came from this location, I decided to stop out at this roadcut for a couple hours today. The weather was perfect, high 70’s and like almost every other trip, I had the place to myself. This cut exposes the Pennsylvanian LaSalle Limestone Member of the Bond Formation and never disappoints, that is if you are looking for brachiopods. Unfortunately, this time I did not find and shark teeth, like I did on my last two recent trips. I did find one of my largest Echinoconchus brachiopods that I have ever found. The other usual suspects were also found- Wilkingia terminalis Bivalve, and the following other brachiopods- Lindoproductus cora, Antiquatonia portlockiana, Composita argentia and Neospirifer, an inarticulate brachiopod. I also found a few pieces with nice crystallization.

Today I stopped to stretch my back and did about 10 minutes of collecting near Whites Creek, Tennessee- I believe that this might be Richmond Group Ordovician. I would be looking for a little help on some IDs, I believe @Peat Burns, @Herb And @Tidgy's Dad might be able to help out. Here are some of my finds- Brachiopods- Gastropods- Bryozoan- I believe that the smaller pieces are Constellatia Florida. Hash Plates-

Hello everyone. I have come across these in my collection and could someone gives me info at all. Possibly just the common name and maybe a rough time period.

I am unsure on the identification of this brachiopod. It is from the Leighton Formation, Maine; which is Silurian, Pridoli. According to Maine's Paleozoic Record (an excellent book that lists all the fauna and flora found in formations across Maine), there are only two Rhynchonellid genera in this formation, Camarotoechia and Rhynchotrema. It does not look like a Camarotoechia, but I cannot find many references for the internal mold of Rhynchotrema brachiopods. I would appreciate any references you have on this genus, as well as any advice on the identification of it (@Tidgy's Dad?).Thanks in advance for your help! Regards, Asher

This is another fossil from the Silurian Leighton Fm, Maine. It is an excellently preserved internal and external mold of a brachiopod. It is similar to the Salopina species that I am constantly finding in this formation, but this brachiopod's valve is more strongly curved, instead of almost flat. It also has less numerous striae, and they almost reach the median process. As well as this, the dental plate is thinner and curves inward more strongly, and the ctenophoridium is wider. Any help on its identification would be greatly appreciated. Here are some pictures of it (internal mold on the left, external on the right):

I had the opportunity to visit another Silurian site in the northern Georgia/southern Tennessee area. This is now the third such site I've visited, but the first in the Rockwood Formation as opposed to the Red Mountain Formation. As far as I can tell there's very little different between the two lithologically and paleontologically, with the Rockwood and Red Mountain occupying pretty much the same stratigraphic position. The difference seems to be that the TGS prefers to use the term "Rockwood" to describe it's Niagaran Silurian system and the GGS and AGS prefer the term "Red Mountain", mostly because the unit is more differentiable in Tennessee whereas in southern NW Georgia and Alabama it is less differentiable. However, the GGS does use the term Rockwood in some of it's reports, and there are some lithological differences between the more southerly and easterly exposures and the more northerly and westerly ones (most notably in the thickness of the hematite beds), so I'm going with Rockwood Formation for these specimens. I had some difficulty in telling the age of the rocks at first. The geologic map I was using wasn't very accurate, and had both the Rockwood Formation and some upper Ordovician units within close proximity to each other. As you'll see with some of the fossils, there are some forms more associated with the Ordovician, such as Isotelus and Vinlandostrophia (Platystrophia), but at the same time I couldn't help but notice there were some similar characteristics between this fauna and the Rose Hill Formation, such as the calymenid molt fragments, and prevalence of Leptaena, which I did not find in the nearby upper Ordovician rocks (not to say it doesn't occur in the Ordovician, just that I didn't find it). Combined with the presence of Eospirifer and the thin beds of iron-rich sandstone and ferruginous limestone, this site is most likely in the Silurian Rockwood Formation. However, in my opinion, it appears to host an earlier, transitionary fauna than the Rose Hill. The collecting itself was pretty easy. The weather was nice, the site not too hard to explore, and the fossils easily extracted from the rock. Most of the exposure was unfossiliferous, however every now and then I'd come across a little part where there'd be a densely packed assemblage, with some loose specimens scattered about. The shale and thin limestone were the most fossiliferous. The first up are some of the brachiopods. A couple of different species it looks like, both tentatively of the genus Dalmanella sp. The report I'm basing this on is pretty old so that name probably no longer applies, however. These are pretty good examples of the more Ordovician forms present at this site. Although Vinlandostrophia (Platystrophia) sp. does occur in the Silurian as late as the Waldron Shale, it is definitely more common in the Ordovician, where V. ponderosa forms veritable coquinas in the upper Leipers Formation. It's a bit hard to see in the bottom one, but it does have a sulcus, unlike most of the Dalmanella sp. present. A few Leptaena sp. Although it is known from the upper Ordovician, I have not found it in the Ordovician rocks nearby and have found several in the Silurian Rose Hill Formation. It is interesting to note that there are such similarities between the two early Silurian fauna across such distances. One characteristic I quickly noticed was that a lot of the specimens in this area occur as loose shells, whereas in Maryland and Pennsylvania they're often internal molds wedged in rock. It makes for easier collecting, and more photogenic fossils! I'm going to go out on a limb and say this is Dalmanella elegantula(?) Pretty good preservation on this one, but I'm not quite sure about it's ID. Maybe some kind of Chonetes (?) sp. Eospirifer sp. with crystalline preservation.