Search the Community
Showing results for tags 'lower devonian'.
Found 87 results
-
Hi all! Yesterday I visited Formosa Reef here in Ontario (Amherstburg Formation, Lower Devonian), and I found these weird circular imprints on a few rocks - does anyone know what they are? @Kane Thanks a bunch! Monica photo with ruler for scale: close up photos:
- 35 replies
-
- 4
-
-
- amherstburg formation
- lower devonian
- (and 4 more)
-
Today I was able to get out to the outcrop along Rickard Hill in Schoharie, New York. I didn’t find a ton of interesting things because I was looking in a more crystalline layer of the Kalkberg formation that had less abundant fossils. I found a handful of nice orthid, spiriferid, and atrypid brachiopods and one fenestellid bryozoan. Next time I go I’m going to try and get into a different, more fossiliferous layer because the crystalline rock is hard to break and when it does it breaks randomly, often damaging the fossils.
-
Today on a hunt in the lower devonian of new york, I found on of the most unusual piece and I can't decide if its bryzoan or possible placoderm.
-
Hi everyone! I was just looking through some of my fossils yesterday, and I noticed the following item on one of the rocks I collected from "Formosa Reef" in Ontario, Canada back in March. These rocks are from the Amherstburg Formation and are Lower Devonian in age. Could this be a trilo-bit? Or is it something else? I'll tag @piranha and @Kane to see if they have any ideas. Thanks in advance for your help! Monica The whole rock with the unknown item circled in red: Close-ups and different views of the unknown item:
-
Here a partial collected last week from the New Scotland Formation near Port Jervis NY. The list of trilobites found in this formation (in NY) is short. So will say it looks like Dalmanites pleuroptyx. Cheers, Gordon
- 7 replies
-
- 13
-
-
- new scotland formation
- lower devonian
- (and 1 more)
-
Acanthopyge contusa hypostome to the ROM
Monica posted a topic in Partners in Paleontology - Member Contributions to Science
Hello everyone! I wanted to share some good news with you all... On Monday, March 16, 2020, I visited "Formosa Reef" in Ontario (Amherstburg Formation, Lower Devonian) for a little fossil hunt. One of the rocks that I found at the site had a trilobite piece that @piranha identified as the hypostome belonging to the trilobite Acanthopyge contusa. When I asked him if he knew of any museum/researcher who might be interested in my specimen, he suggested that I contact the Royal Ontario Museum (ROM), and so I did. First, I emailed David Rudkin, and this is what he said: "Thank you very much for getting in touch and offering to donate your splendid little Acanthopyge hypostome! I've been retired from the ROM for 3 years now and am not permitted to act on behalf of the Invertebrate Palaeontology section, but I am copying these messages to the Curator and Collection Manager with my recommendation to accept your generous offer." "Acanthopyge contusa is indeed a relatively rare component of the Formosa trilobite fauna and the ROM collections do not hold any specimens of the elusive hypostome. Like your contact on The Fossil Forum I've not seen one from Ontario before, so your discovery is quite exciting ... at least for a self-professed trilobite geek such as myself! I'm hoping that my ROM colleagues, Dr Caron and Ms Akrami, will follow my recommendation to accept your offer, but I must leave the final decision in their hands." Just last night, I received two consecutive emails from Maryam Akrami (the current Invertebrate Paleontology Collections Manager at the ROM): "Thank you for sending the images and the information for the trilobite specimen. I am glad to let you know that we will accept your offer of donation. Just want to let you know that the ROM is closed until at least 5th April. If you would like to ship the specimen to us now, I can give you my home address. Once we have the specimen, I will send you a letter acknowledging your generous donation to the ROM." "Following up on my previous email (below), given the current situation and the advise against leaving our homes for non-essential reasons, perhaps it would be a good idea to wait till things return to normal and then ship the specimen to us. I hope that would be ok with yourself." So, once the ROM is up and running again, I'll be handing over my little Acanthopyge contusa hypostome to the ROM! I'll update this thread as soon as the donation has been completed. Here are pictures of the specimen in question: Thanks for reading, everyone! Monica- 32 replies
-
- 18
-
-
- rom
- royal ontario museum
- (and 7 more)
-
Hi all! After reading about @Kane's autumn trip to Ontario's Formosa Reef (Amherstburg Formation, Lower Devonian), I was inspired to find it and check it out myself. With the help of Ludvigsen's 1986 paper entitled "Reef trilobites from the Formosa Limestone (Lower Devonian) of southern Ontario," along with Google Maps' Satellite View, I was able to locate the reef, so Viola and I made the 2-hour drive yesterday to search the site for some new fossils. Here's Viola standing atop the reef: This was my first find of the day - a rock with a brachiopod AND a gastropod in it - woohoo!!! This was one of Viola's first finds of the day and probably her favourite - a large and beautiful chunk of tabulate coral: Here is a photo of Viola and I just before we left the site after about 3 hours of fossil-hunting: Photos of the fossils to come...
- 32 replies
-
- 14
-
-
- ontario
- lower devonian
- (and 2 more)
-
I had already planned on sharing this a couple days ago. With the recent posting of the Martian pseudocrinoid, the timing of this new paper is perfect! Bonus Points Question: Trombonicrinus (col.) hanshessi gen. et sp. nov. Does anyone have a suggestion for the use of the abbreviation (col.)? A colleague responded: "Odd. I imagine it is for column, but do not really know. If so, it would be as if they are regarded it as a form genus allowed in the botanical, but not the zoological code." Etymology: From the French trombone (earlier, trombon), a brass wind instrument with a slide bent in a tight U-shape (Little et al. 1983, p. 2368). The overall appearance of this crinoid stem is reminiscent of the slide of a trombone. Donovan, S.K., Waters, J.A. and Pankowski, M.S. 2018 Form and function of the strangest crinoid stem: Devonian of Morocco. Swiss Journal of Palaeontology, (ahead-of-print publication) 6 pp.
- 6 replies
-
- 6
-
-
- lower devonian
- trombonicrinus
- (and 1 more)
-
From the album MY FOSSIL Collection - Dpaul7
Kainops invius Trilobite Bois d’Arc Formation, Oklahoma Lower Devonian (359-383 Million Years Ago) Kainops is a genus of trilobites from the family Phacopidae, order Phacopida. It can be distinguished from Paciphacops by the greater number of facets to the eye (6–8 per row, compared to 3–4 in Paciphacops). The form of the furrow between the palpebral area and the palpebral lobe also distinguishes Kainops from the genera Paciphacops and Viaphacops. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Phacopida Family: †Phacopidae Genus: †Kainops Species: †invius -
Several weeks ago a brief break in the weather and snow cover permitted a hike in Montague where we saw a modest outcrop of the Port Jervis Formation. A similar short spell of nice weather earlier this week, it is snowing now, afforded the opportunity to check it out. The characteristic specimens Phalangocephalus dentatus, Barrett 1874, and Nanothyris subglobosa, Weller 1903. Cheers, Gordon
-
From the album Trilobites
Taxonomy: Unknown/unidentified Age: Lower Devonian Location: London (mixed import fill: Bois Blanc, Amherstberg, Dundee) Source: Self-collected Unknown trilobite pygidium. Axial sits very high on specimen, tapering and with slightly incised axial rings (similar to Anchiopsis anchiops, but no terminal pygidial spike). Most similar to Mannopyge halli, but missing nodes on pygidial border. The presence of a border does suggest a dechenellid. That's all I know! Searching through my literature has not yielded a close enough match. -
From the album MY FOSSIL Collection - Dpaul7
Discomyorthis oblata Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Orthida is an extinct order of brachiopods which appeared during the Early Cambrian period and became very diverse by the Ordovician, living in shallow-shelf seas. Orthids are the oldest member of the subphylum Rhynchonelliformea, and is the order from which all other brachiopods of this group stem. Physically they are usually strophic, with well-developed interareas. They also commonly have radiating ribs, sulcus, and fold structures. Typically one valve, often the brachial valve, is flatter than the other. The interior structure of the brachial valves are usually simple. In shape they are sub-circular to elliptical, with typically biconvex valves. There is some debate over the forms that first appeared of this order as to how they should be classified. However, they began to differentiate themselves by the late Early Cambrian period, and by the late Cambrian period had diversified into numerous varieties and reach 2 to 5 cm in width. Specimens from the late Cambrian to the earliest Ordovician exhibit shells with rounded and pointed pedical valves, with sharp to obtuse extremities and ridges that are fine to course. Punctate shells appear during the mid-Ordovician, which establish the suborder Dalmanellidina. The Ordovician is a productive period which gives rise to numerous genera in this order. However, they started to become greatly reduced by the end of the Ordovician extinction event. Both the impunctate and punctate survived through to the early Devonian Eventually, though, only the punctate lived on, and would play a minor role in benthic ecosystems until the late Permian, when they became extinct. Kingdom: Animalia Phylum: Brachiopoda Class: †Rhynchonellata Order: †Orthida Family: †Rhipidomellidae Genus: †Discomyorthis Species: †oblata -
From the album MY FOSSIL Collection - Dpaul7
Discomyorthis oblata Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Orthida is an extinct order of brachiopods which appeared during the Early Cambrian period and became very diverse by the Ordovician, living in shallow-shelf seas. Orthids are the oldest member of the subphylum Rhynchonelliformea, and is the order from which all other brachiopods of this group stem. Physically they are usually strophic, with well-developed interareas. They also commonly have radiating ribs, sulcus, and fold structures. Typically one valve, often the brachial valve, is flatter than the other. The interior structure of the brachial valves are usually simple. In shape they are sub-circular to elliptical, with typically biconvex valves. There is some debate over the forms that first appeared of this order as to how they should be classified. However, they began to differentiate themselves by the late Early Cambrian period, and by the late Cambrian period had diversified into numerous varieties and reach 2 to 5 cm in width. Specimens from the late Cambrian to the earliest Ordovician exhibit shells with rounded and pointed pedical valves, with sharp to obtuse extremities and ridges that are fine to course. Punctate shells appear during the mid-Ordovician, which establish the suborder Dalmanellidina. The Ordovician is a productive period which gives rise to numerous genera in this order. However, they started to become greatly reduced by the end of the Ordovician extinction event. Both the impunctate and punctate survived through to the early Devonian Eventually, though, only the punctate lived on, and would play a minor role in benthic ecosystems until the late Permian, when they became extinct. Kingdom: Animalia Phylum: Brachiopoda Class: †Rhynchonellata Order: †Orthida Family: †Rhipidomellidae Genus: †Discomyorthis Species: †oblata -
From the album MY FOSSIL Collection - Dpaul7
Leptaena acuticuspidata Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Leptaena, genus of extinct brachiopods (lamp shells) commonly found as fossils in Ordovician to Lower Carboniferous sedimentary rocks (between 488 million and 318 million years old). The very distinctive shell of Leptaena is characterized by its wrinkled ornamentation and fine linear markings. Leptanea (Dalman 1828) is a flat, Strophomenid type shell that develops a defined lip. This prolific and long lived genera is easily recognizable and can be found in rocks from the Ordovician through the Carboniferous. Strophomenata is an extinct class of brachiopods in the subphylum Rhynchonelliformea. Kingdom: Animalia Phylum: Brachiopoda Class: †Strophomenata Order: †Strophomenata Family: †Rafinesquinidae Genus: †Leptaena Species: †acuticuspidata -
From the album MY FOSSIL Collection - Dpaul7
Anastrophia grossa Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Data: The genus Anastrophia first becomes widely seen in the Silurian and it extends into the lower Devonian before disappearing from the fossil record. The specimens below are Anastrophia grossa from the Bois d'Arc formation of Oklahoma. The shell is subpentagonal in outline with coarse costae present on both valves. There is a shallow sulcus on the pedicle valve that becomes much more expressed at the anterior margin forming a "u" shape. The corresponding fold is also shallow. Both valves are convex with the brachial valve being more so than the pedicle valve. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Pentamerida Family: †Parastrophinidae Genus: †Anastrophia Species: †grossa -
From the album MY FOSSIL Collection - Dpaul7
Anastrophia grossa Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Data: The genus Anastrophia first becomes widely seen in the Silurian and it extends into the lower Devonian before disappearing from the fossil record. The specimens below are Anastrophia grossa from the Bois d'Arc formation of Oklahoma. The shell is subpentagonal in outline with coarse costae present on both valves. There is a shallow sulcus on the pedicle valve that becomes much more expressed at the anterior margin forming a "u" shape. The corresponding fold is also shallow. Both valves are convex with the brachial valve being more so than the pedicle valve. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Pentamerida Family: †Parastrophinidae Genus: †Anastrophia Species: †grossa -
Levenea subcarinata pumilis Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) One of the more common brachiopods that are found in the BoLevenea subcarinata pumilis Brachiopod A.jpg
Dpaul7 posted a gallery image in Members Gallery
From the album MY FOSSIL Collection - Dpaul7
Levenea subcarinata pumilis Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) One of the more common brachiopods that are found in the Bois d'Arc formation is Levenea subcarinata pumilis. It is similar to Rhipimelloides oblata except for a few key features. The hinge line is wide and straight and the presence of a wide, shallow fold/sulcus structure. Otherwise they share some similar traits like the rounded shape to the shell and the pedicle valve extending slightly past the brachial valve. Another difference are the fine costae on the valve surfaces which on L. subcarinata pumilis are more curved instead of straight. the margin between the valves is flat except for where it bends to follow the fold/sulcus. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Dalmanellidae Genus: †Levenea Species: †subcarinata pumilis -
Levenea subcarinata pumilis Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) One of the more common brachiopods that are found in the BoLevenea subcarinata pumilis Brachiopod A.jpg
Dpaul7 posted a gallery image in Members Gallery
From the album MY FOSSIL Collection - Dpaul7
Levenea subcarinata pumilis Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) One of the more common brachiopods that are found in the Bois d'Arc formation is Levenea subcarinata pumilis. It is similar to Rhipimelloides oblata except for a few key features. The hinge line is wide and straight and the presence of a wide, shallow fold/sulcus structure. Otherwise they share some similar traits like the rounded shape to the shell and the pedicle valve extending slightly past the brachial valve. Another difference are the fine costae on the valve surfaces which on L. subcarinata pumilis are more curved instead of straight. the margin between the valves is flat except for where it bends to follow the fold/sulcus. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Dalmanellidae Genus: †Levenea Species: †subcarinata pumilis -
Orthostrophia strophomenoides parva Brachiopod a.jpg
Dpaul7 posted a gallery image in Members Gallery
From the album MY FOSSIL Collection - Dpaul7
Orthostrophia strophomenoides parva Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Orthida is an extinct order of brachiopods which appeared during the Early Cambrian period and became very diverse by the Ordovician, living in shallow-shelf seas. Orthids are the oldest member of the subphylum Rhynchonelliformea, and is the order from which all other brachiopods of this group stem. Physically they are usually strophic, with well-developed interareas. They also commonly have radiating ribs, sulcus, and fold structures. Typically one valve, often the brachial valve, is flatter than the other. The interior structure of the brachial valves are usually simple. In shape they are sub-circular to elliptical, with typically biconvex valves. There is some debate over the forms that first appeared of this order as to how they should be classified. However, they began to differentiate themselves by the late Early Cambrian period, and by the late Cambrian period had diversified into numerous varieties and reach 2 to 5 cm in width. Specimens from the late Cambrian to the earliest Ordovician exhibit shells with rounded and pointed pedical valves, with sharp to obtuse extremities and ridges that are fine to course. Punctate shells appear during the mid-Ordovician, which establish the suborder Dalmanellidina. The Ordovician is a productive period which gives rise to numerous genera in this order. However, they started to become greatly reduced by the end of the Ordovician extinction event. Both the impunctate and punctate survived through to the early Devonian Eventually, though, only the punctate lived on, and would play a minor role in benthic ecosystems until the late Permian, when they became extinct. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Orthidae Genus: †Orthostrophia Species: †strophomenoides parva -
Orthostrophia strophomenoides parva Brachiopod a.jpg
Dpaul7 posted a gallery image in Members Gallery
From the album MY FOSSIL Collection - Dpaul7
Orthostrophia strophomenoides parva Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Orthida is an extinct order of brachiopods which appeared during the Early Cambrian period and became very diverse by the Ordovician, living in shallow-shelf seas. Orthids are the oldest member of the subphylum Rhynchonelliformea, and is the order from which all other brachiopods of this group stem. Physically they are usually strophic, with well-developed interareas. They also commonly have radiating ribs, sulcus, and fold structures. Typically one valve, often the brachial valve, is flatter than the other. The interior structure of the brachial valves are usually simple. In shape they are sub-circular to elliptical, with typically biconvex valves. There is some debate over the forms that first appeared of this order as to how they should be classified. However, they began to differentiate themselves by the late Early Cambrian period, and by the late Cambrian period had diversified into numerous varieties and reach 2 to 5 cm in width. Specimens from the late Cambrian to the earliest Ordovician exhibit shells with rounded and pointed pedical valves, with sharp to obtuse extremities and ridges that are fine to course. Punctate shells appear during the mid-Ordovician, which establish the suborder Dalmanellidina. The Ordovician is a productive period which gives rise to numerous genera in this order. However, they started to become greatly reduced by the end of the Ordovician extinction event. Both the impunctate and punctate survived through to the early Devonian Eventually, though, only the punctate lived on, and would play a minor role in benthic ecosystems until the late Permian, when they became extinct. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Orthidae Genus: †Orthostrophia Species: †strophomenoides parva -
From the album MY FOSSIL Collection - Dpaul7
Obturamentella wadei Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) The taxonomic order Rhynchonellida is one of the two main groups of living articulate brachiopods, the other being the order Terebratulida. They are recognized by their strongly ribbed wedge-shaped or nut-like shells, and the very short hinge line. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: Rhynchonellida Family: †Obturamentellidae Genus: †Obturamentella Species: †wadei -
From the album MY FOSSIL Collection - Dpaul7
Obturamentella wadei Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) The taxonomic order Rhynchonellida is one of the two main groups of living articulate brachiopods, the other being the order Terebratulida. They are recognized by their strongly ribbed wedge-shaped or nut-like shells, and the very short hinge line. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: Rhynchonellida Family: †Obturamentellidae Genus: †Obturamentella Species: †wadei -
From the album MY FOSSIL Collection - Dpaul7
Meristella atoka Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Meristella is an extinct genus of brachiopods found from the Late Silurian to the Late Devonian They are characterized by a smooth oval shell and a prominent incurved beak on the pedicle valve. Meristella is placed in the family Meristellidae of the articulate brachiopod order Athyridida. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Athyridida Family: †Meristellidae Genus: †Meristella Species: †atoka -
From the album MY FOSSIL Collection - Dpaul7
Meristella atoka Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Meristella is an extinct genus of brachiopods found from the Late Silurian to the Late Devonian They are characterized by a smooth oval shell and a prominent incurved beak on the pedicle valve. Meristella is placed in the family Meristellidae of the articulate brachiopod order Athyridida. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Athyridida Family: †Meristellidae Genus: †Meristella Species: †atoka -
From the album MY FOSSIL Collection - Dpaul7
Atrypa oklahomensis Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) Atrypa is a genus of brachiopod with shells round to short egg-shaped, covered with many fine radial ridges (or costae), that split further out and growthlines perpendicular to the costae and 2-3 times wider spaced. The pedunculate valve is a little convex, but tends to level out or even become slightly concave toward the anterior margin (that is: opposite hinge and pedicle). The brachial valve is highly convex. There is no interarea (that is a flat area bordering the hinge line approximately perpendicular with the rest of the valve) in either valve. Atrypa was a cosmopolitan and occurred from the late Lower Silurian (Telychian) to the early Upper Devonian (Frasnian). Other sources expand the range from the Late Ordovician to Carboniferous, approximately from 449 to 336 Ma. A proposed new species, A. harrisi, was found in the trilobite-rich Floresta Formation in Boyacá, Colombia. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Spiriferida Family: †Atrypidae Genus: †Atrypa Species: †oklahomensis
