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Showing results for tags 'ordovician'.
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From the album: MY FOSSIL Collection - Dpaul7
Platystrophia ponderosa Brachiopod Trimble County, Kentucky TIME PERIOD: Ordovician Period (445-485 Million Years ago) Platystrophia is an extinct genus of brachiopods that lived from the Ordovician to the Silurian in Asia, Europe, North America, and South America. It has a prominent sulcus and fold. It usually lived in marine lime mud and sands. Brachiopods, phylum Brachiopoda, are a group of lophotrochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major groups are recognized, articulate and inarticulate. The word "articulate" is used to describe the tooth-and-groove features of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic feature (fossilizable), by which the two main groups can be readily distinguished. Articulate brachiopods have toothed hinges and simple opening and closing muscles, while inarticulate brachiopods have untoothed hinges and a more complex system of muscles used to keep the two halves aligned. In a typical brachiopod a stalk-like pedicle projects from an opening in one of the valves near the hinges, known as the pedicle valve, keeping the animal anchored to the seabed but clear of silt that would obstruct the opening. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Plectorthidae Genus: †Platystrophia Species: †ponderosa -
From the album: MY FOSSIL Collection - Dpaul7
Hebertella occidentalis Brachiopod Trimble County, Kentucky TIME PERIOD: Ordovician Period (445-485 Million Years ago) Data: Moderate to large Hebertella species with a subquadrate outline and a moderate to highly pronounced sulcus. Shell wider than long; shell depth variable, convexoconcave to unequally biconvex; cardinal extremities angular; sulcus wide with moderate to very high depth, typically well developed in larger specimins; ventral muscle scars of variable width; dorsal and ventral umbonal angles low (<135 degrees). Articulate brachiopod. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Plectorthidae Genus: †Herbertella Species: †occidentalis -
From the album: MY FOSSIL Collection - Dpaul7
Hebertella occidentalis Brachiopod Trimble County, Kentucky TIME PERIOD: Ordovician Period (445-485 Million Years ago) Data: Moderate to large Hebertella species with a subquadrate outline and a moderate to highly pronounced sulcus. Shell wider than long; shell depth variable, convexoconcave to unequally biconvex; cardinal extremities angular; sulcus wide with moderate to very high depth, typically well developed in larger specimins; ventral muscle scars of variable width; dorsal and ventral umbonal angles low (<135 degrees). Articulate brachiopod. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Plectorthidae Genus: †Herbertella Species: †occidentalis-
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From the album: MY FOSSIL Collection - Dpaul7
Hebertella occidentalis Brachiopod Trimble County, Kentucky TIME PERIOD: Ordovician Period (445-485 Million Years ago) Moderate to large Hebertella species with a subquadrate outline and a moderate to highly pronounced sulcus. Shell wider than long; shell depth variable, convexoconcave to unequally biconvex; cardinal extremities angular; sulcus wide with moderate to very high depth, typically well developed in larger specimins; ventral muscle scars of variable width; dorsal and ventral umbonal angles low (<135 degrees). Articulate brachiopod. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Plectorthidae Genus: †Herbertella Species: †occidentalis-
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From the album: MY FOSSIL Collection - Dpaul7
Calymene tristani Trilobite Jebel Issoumour, Alnif, Morocco TIME PERIOD: Ordovician Age (444-486 Million Years Ago) Calymene (meaning beautiful crescent as a reference to the glabella) is a genus of trilobites in the order Phacopida that are found throughout North America, North Africa, and Europe in primarily Silurian outcrops. Calymene is closely related to Flexicalymene, and both genera are frequently found inrolled. Calymene trilobites are small, typically 2 cm in length. Their cephalon is the widest part of the animal, and the thorax is usually in 13 segments. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Phacopida Family: †Calymenidae Genus: †Calymene Species: †tristani-
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- morocco time period: ordovician age (444-486 million years ago) calymene (meaning beautiful crescent as a reference to the glabella) is a genus of trilobites in the order phacopida that are found throughout north america
- north africa
- and europe in primarily silurian outcrops. calymene is closely related to flexicalymene
- and both genera are frequently found inrolled. calymene trilobites are small
- typically 2 cm in length. their cephalon is the widest part of the animal
- and the thorax is usually in 13 segments. kingdom: animalia phylum: arthropoda class: †trilobita order: †phacopida family: †calymenidae genus: †calymene species: †tristani drag files here to attach
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Very RARE 100%Natural Declivolithus Trilobite Fossil a.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Declivolithus alfredi Trilobite SITE LOCATION: Ourzazate, Morocco TIME PERIOD: Ordovician Era (443 to 485 million years ago) Here is a FAINT VERY RARE and absolutely 100% natural Declivolithus cf. alfredi Trilobite Fossil specimen that was found near Ourzazate, Morocco. Trinucleidae is a family of small to average size asaphid trilobites that first occurred at the start of the Ordovician and became extinct at the end of that period. It contains approximately 227 species divided over 51 genera in 5 subfamilies. Trinucleidae is an extinct family of fast-moving low-level epifaunal suspension feeders. Description of the Family: Cephalic fringe broad, sloping outward, with numerous pits on external surfaces. Occipital ring convex. Thorax with six segments,deep apodemal pits in articulating furrows. Pygidium triangular, length 0.25 to 0.5 of width; axis with many rings; pleural fields with shallow pleural furrows. Glabella and genae may have articulate pattern of raised edges. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Asaphida Family: †Trinucleidae Genus: †Declivolithus Species: †alfredi-
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Very RARE 100%Natural Declivolithus Trilobite Fossil a.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Declivolithus alfredi Trilobite SITE LOCATION: Ourzazate, Morocco TIME PERIOD: Ordovician Era (443 to 485 million years ago) Here is a FAINT VERY RARE and absolutely 100% natural Declivolithus cf. alfredi Trilobite Fossil specimen that was found near Ourzazate, Morocco. Trinucleidae is a family of small to average size asaphid trilobites that first occurred at the start of the Ordovician and became extinct at the end of that period. It contains approximately 227 species divided over 51 genera in 5 subfamilies. Trinucleidae is an extinct family of fast-moving low-level epifaunal suspension feeders. Description of the Family: Cephalic fringe broad, sloping outward, with numerous pits on external surfaces. Occipital ring convex. Thorax with six segments,deep apodemal pits in articulating furrows. Pygidium triangular, length 0.25 to 0.5 of width; axis with many rings; pleural fields with shallow pleural furrows. Glabella and genae may have articulate pattern of raised edges. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Asaphida Family: †Trinucleidae Genus: †Declivolithus Species: †alfredi-
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Very RARE 100%Natural Declivolithus Trilobite Fossil a.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Declivolithus alfredi Trilobite SITE LOCATION: Ourzazate, Morocco TIME PERIOD: Ordovician Era (443 to 485 million years ago) Here is a FAINT VERY RARE and absolutely 100% natural Declivolithus cf. alfredi Trilobite Fossil specimen that was found near Ourzazate, Morocco. Trinucleidae is a family of small to average size asaphid trilobites that first occurred at the start of the Ordovician and became extinct at the end of that period. It contains approximately 227 species divided over 51 genera in 5 subfamilies. Trinucleidae is an extinct family of fast-moving low-level epifaunal suspension feeders. Description of the Family: Cephalic fringe broad, sloping outward, with numerous pits on external surfaces. Occipital ring convex. Thorax with six segments,deep apodemal pits in articulating furrows. Pygidium triangular, length 0.25 to 0.5 of width; axis with many rings; pleural fields with shallow pleural furrows. Glabella and genae may have articulate pattern of raised edges. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Asaphida Family: †Trinucleidae Genus: †Declivolithus Species: †alfredi-
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Very RARE 100%Natural Declivolithus Trilobite Fossil a.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Declivolithus alfredi Trilobite SITE LOCATION: Ourzazate, Morocco TIME PERIOD: Ordovician Era (443 to 485 million years ago) Here is a FAINT VERY RARE and absolutely 100% natural Declivolithus cf. alfredi Trilobite Fossil specimen that was found near Ourzazate, Morocco. Trinucleidae is a family of small to average size asaphid trilobites that first occurred at the start of the Ordovician and became extinct at the end of that period. It contains approximately 227 species divided over 51 genera in 5 subfamilies. Trinucleidae is an extinct family of fast-moving low-level epifaunal suspension feeders. Description of the Family: Cephalic fringe broad, sloping outward, with numerous pits on external surfaces. Occipital ring convex. Thorax with six segments,deep apodemal pits in articulating furrows. Pygidium triangular, length 0.25 to 0.5 of width; axis with many rings; pleural fields with shallow pleural furrows. Glabella and genae may have articulate pattern of raised edges. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Asaphida Family: †Trinucleidae Genus: †Declivolithus Species: †alfredi-
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From the album: Trilobites
Pseudogygites latimarginatus- 1 comment
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Today on day 2, I spent about six hours in the on and off rain, near Lawrenceburg, Indiana collecting Ordovician fossils. I found numerous trilobite parts, but nothing complete. Things that believe are parts of trilobites- "Isotelus" fragments. These two pieces were on a very large block that was not feasible to try and move. I figured that I would try and get them out, but unfortunately, I was not successful . Many Cephalopods – Brachiopods- "Platystrophia" "Rafinisquina" Gastropods– Believe these to be "Cyclonema". Bryozoan– Crinoid Stems– How they were found:
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The reverse of this piece has specimens of Tetragraptus serra. and this side shows fragments of other graptolites, possibly Tetragraptus and / or other Dichograptids.
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A nice Dictyonema flabelliforme dendroid graptolite from Oslo Fields in Norway. It's Tremadoc, Lower Ordovician in age and is thus maybe around 480 mya. Another angle :
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- first bani group
- trigonirhynchiidae
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- rostricellula minnesotensis
- izzegguirine formation
- rhynchotrematidae
- rostricellula
- rhynchotrema wisconsinense
- rhynchotrema ainsliei
- rhynchotrema
- minnesota
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- cummingsville formation
- lituites
- lituites lituus
- trilacinoceras hunanense
- huk formation
- trilacinoceras
- slemmested
- phyllograptus angustifolius
- phyllograptus
- rhabdinopleura flabelliformis
- rhabdinopleura
- tetragraptus serra
- tetragraptus
- upper ordovician
- arenig
- late ordovician
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- middle ordovician
- dictyonema flabelliforme
- dictyonema
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- pagoda formation
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- ampyx priscus
- upper fezouata formation
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- dufton shales
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- williamson county
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A common scandent, biserial form, frequently found alongside the zonal species Didymograptus murchisoni at this famous locality. The individuals on this surface are current aligned. Reference for ID: Elles & Wood 1901-1918, Monograph on British Graptolites, Pal. Soc. Monograph v.33. (Plate XXX, fig 6)
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Today I decided to go and visit a roadcut that I red on one of the Silurian literatures I got my hands on (a big thank you to those that led me to those PDFs relating to the geology of the Niagara Escarpment). It turns out the roadcut on the Niagara Escarpment is near my home which is a pleasant suprise to me, considering that I have been disappointed by the Queenston formation. This roadcut is actually several exposures that run on an access road that can lead one to the upper part of Hamilton, Ontario. Here is the exposure I decided to explore. I chose this exposure as the access is a busy boulevard with cars driving by with no sidewalks and pedestrians. I had several people honk and call out to me as I was exploring the site. Maybe I should have worn a safety vest of some sort? Is that even necessary?
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Hello, I've been recently fascinated by large isotelus trilobites. Does anyone on here own one and would like to show and talk about it, I would if I owned one but I don't see that happening anytime soon haha. This is the largest I've seen for sale so far that would've been 8 inches, would be nice to be able to find one but I don't have that luxury.
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From the album: Trilobites
Taxonomy: Flexicalymene senaria Age: M. Ordovician Location: Brechin, ON (Verulam Fm). Source: Self-collected Remarks: Prone specimen crushed in the centre. Large pregalebllar lip similar in this specimen as F. croneisi, but lacking the pustules of the latter.-
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From the album: Trilobites
Taxonomy: Pseudogygites latimarginatus Age: Ordovician (Whitby Formation) Location: Craiglieth area, Ontario Source: Self-collected Notes: Specimen is fairly complete, if not very much damaged. I actually hadn't known it was complete until going through my finds pile.-
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Rafinesquina (brachiopod) on matrix from Brechin, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Ordovician
Rafinesquina alternata (brachiopod) Upper Ordovician Verulam Formation James Dick Quarry Brechin, Ontario Notice the bryozoans and tiny Flexicalymene (trilobite) cephalon on the matrix.-
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Tiny Anazyga (brachiopods) from Brechin, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Ordovician
Anazyga recurvirosta (brachiopods) Upper Ordovician Verulam Formation James Dick Quarry Brechin, Ontario- 3 comments
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From the album: Ordovician
Damanella testudinaria (brachiopod) Upper Ordovician Verulam Formation James Dick Quarry Brechin, Ontario-
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Rhynchotrema brachiopods from Brechin, Ontario
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From the album: Ordovician
Rhynchotrema sp. (brachiopods) Upper Ordovician Verulam Formation James Dick Quarry Brechin, Ontario-
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From the album: Ordovician
Liospira (gastropod) Upper Ordovician Verulam Formation James Dick Quarry Brechin, Ontario-
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From the album: Ordovician
Cyclonema bilix (gastropod) Upper Ordovician Verulam Formation James Dick Quarry Brechin, Ontario-
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Minature Enrolled Isotelus gigas from Brechin, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Ordovician
Isoteles gigas (enrolled juvenile trilobite) Upper Ordovician Verulam Formation James Dick Quarry Brechin, Ontario-
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