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I've been sorting out my old collection and came across this, a slab of Lingulella davisii (M'Coy) from North Wales, near Porthmadog. It's from the Ffestiniog Formation, near the top of the Cambrian. I'm sure there's lots of it around but there don't seem to be many pics when I search, apart from in this paper: https://www.jstor.org/stable/pdf/1306865.pdf

Hey friends, pulled this one from the surf at Flag Ponds Nature Park in Maryland. Flag Ponds is part of the Miocene era Calvert Cliffs formation on the Chesapeake Bay. Nickel for scale. It’s solid and heavy, teardrop in shape. Best guess from an internet search is a fossilized lingula brachiopod, but I can’t find many loose fossils, just ones still set in matrices. Any and all help is appreciated!

I found this on our property. I don't know if it is even fossils. The ovals vary is size, primarily 1/2 inch, some smaller. All I could find was possible Lingula. Any ideas?

The brachiopod Lingula is locally abundant in the Whitby Formation around Craigleith, Ontario (frequently around the Triarthrus horizon). I have about a dozen specimens of Lingula from the Craigleith/Collingwood area in my collection, and have previously identified them as Lingula cobourgensis based on this: http://www.geologyontario.mndmf.gov.on.ca/mndmfiles/pub/data/imaging/GB07/GB07.pdf This evening, noting that in Liberty's (1969, Palaeozoic Geology of the Lake Simcoe Area) faunal list for the Whitby Formation only Lingula progne was recorded as being present, I decided to do a bit of research on L. progne. In the process, I came across Sinclair's (1945) work Some Ordovician lingulid brachiopods from Ontario and Quebec. Sounds promising, I thought. In this paper, Sinclair names several new species of lingulids, and makes some interesting observations on lingulid taxonomy. At the time, he acknowledged that some taxonomic decisions were more "a matter of subjective judgement rather than of application of objective criteria" and that "If fossils similar to Ordovician species turn up in the Devonian, as they do, there is the presumption that the animals must have been different, even though their shells cannot now be distinguished." (p. 6) However, what I found really interesting were his comments on Collingwood-area lingulids, in particular Lingula progne. Billings' original description of L. progne was of material from the "Trenton limestone" of Montreal area, but his figures were of material from Collingwood, which Sinclair notes is different from the Montreal specimens. "The name [Lingula progne] has been applied since, on the basis of the figures of a shell with prominent septum, to shells common in the Collingwood shale." (p. 38) Subsequently, Sinclair describes the Collingwood L. progne material as a new species, Lingula divulgata: Detail of shell surface: Both of these very closely resemble the lingulids from Craigleith area in my collection. I haven't done a character-based comparison of my specimens with Sinclair's description, but I haven't found any other information on Sinclair's species beyond his original description (Liberty [1969] doesn't mention it, it's not in the Paleobiology Database, etc.). So, my question is: what happened to Lingula divulgata? Is it considered a junior synonym of L. cobourgensis? Or was it just forgotten?

First Fossil - The 3 "possible lingula" fossils are assumed to be internal molds (steinkerns) of a Devonian lingula - found at Tully NY - would like to confirm this. You can see a small part of the shell at the front of the fossil. UPDATE: I added an additional image with a scale. If this is NOT a lingula, do the grooves at the rear of the fossil which are interior structures, give any clues to anyone? Second Fossil - The second set of "clam like" fossil was accidentally discovered in a small section of shale collected at Tully NY when I fragmented the shale to clarify a different fossil. Wondering what this might be - the "step layers" on the shell are interesting but not sure of the ID. Current consensus is that this is a Devonian clam.