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Showing results for tags 'pennsylvanian period'.
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Hello! I received these two pieces as a nice gift! I WANT to say Mariopteris - I think definitely in photo #1 - but photo #2, while I WANT to say Mariopteris, I am leaning a bit toward Eusphenopteris!
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From the album: MY FOSSIL Collection - Dpaul7
Sphenopteris fern Sphenopteris fern Eastern Kentucky, USA Pennsylvanian Period (~ 330 million years ago) Sphenopteris is a genus of seed ferns containing the foliage of various extinct plants, ranging from the Devonian to Late Cretaceous. The frond of Sphenopteris could be up to 20 inches (51 cm) long. Kingdom: Plantae Division: †Pteridospermatophyta Class: †Lyginopteridopsida Order: †Lyginopteridales Family: †Lyginopteridaceae Genus: †Sphenopteris -
From the album: MY FOSSIL Collection - Dpaul7
Pecopteris fern Eastern Kentucky, USA Pennsylvanian Period (~ 330 million years ago) Fern leaves called Pecopteris grew abundantly in the coal swamps of the Carboniferous Period. These leaves dropped off of a 35 foot fern tree called “Psaronius“, one of the most common Paleozoic types. With its sparse and expansive branches, it resembled the modern day palm tree. It produced as many as 7000 spores on the underside of its leaves. These samples are well preserved in gray coal shale as many Carboniferous leaf fossils. Kingdom: Plantae Phylum: Pteridophtya (meaning vascular plant with transport system for nutrients and fluids) Class: Filicopsida (Ferns which reproduce with spores) Order: Marattiales (primitive ferns) Family: Marattiaceae Genus: †Pecopteris -
From the album: MY FOSSIL Collection - Dpaul7
Eusphenopteris fern Eastern Kentucky, USA Pennsylvanian Period (~ 330 million years ago) Pteridosperms or seed ferns are a group of extinct plants with mostly fern-like foliage but having real seeds. They were mostly small trees but other forms that exhibited climbing growth have been found. Some forms, notably those called the Medullosales as seen here had large fronds which could be up several meters long. Several groups can be distinguished within the Pteridosperms. The Pteridosperms evolved in the latest Devonian, and became common in the Carboniferous. The Medullosales took over the leading role during the Westphalian and persisted into the Permian. Kingdom: Plantae Division: Cycadophyta Class: Cycadopsida Order: †Medullosales Family: †Medullosaceae Genus: †Eusphenopteris -
From the album: MY FOSSIL Collection - Dpaul7
Eusphenopteris fern Eastern Kentucky, USA Pennsylvanian Period (~ 330 million years ago) Pteridosperms or seed ferns are a group of extinct plants with mostly fern-like foliage but having real seeds. They were mostly small trees but other forms that exhibited climbing growth have been found. Some forms, notably those called the Medullosales as seen here had large fronds which could be up several meters long. Several groups can be distinguished within the Pteridosperms. The Pteridosperms evolved in the latest Devonian, and became common in the Carboniferous. The Medullosales took over the leading role during the Westphalian and persisted into the Permian. Kingdom: Plantae Division: Cycadophyta Class: Cycadopsida Order: †Medullosales Family: †Medullosaceae Genus: †Eusphenopteris -
From the album: MY FOSSIL Collection - Dpaul7
Alethopteris fern Eastern Kentucky, USA Pennsylvanian Period (~ 330 million years ago) Alethopteris is a prehistoric plant genus of fossil Pteridospermatophyta (seed ferns) that existed in the Carboniferous period (around 360 to 300 million years ago). It is in the family Alethopteridaceae. Kingdom: Plantae Phylum: †Pteridospermatophyta Order: †Medullosales Family: †Alethopteridaceae Genus: †Alethopteris -
From the album: MY FOSSIL Collection - Dpaul7
Neuropteris Leaf Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) Neuropteris is an extinct seed fern that existed in the Carboniferous period, known only from fossils. Major species include Neuropteris loschi. It is a fairly common fossil in bituminous coal with Alethopteris and similar ferns, especially in the Carboniferous Alleghany Mountains of Pennsylvania, they can be found near St. Clair, Pennsylvania. One common leaf fossil found during the Carboniferous was once called Neuropteris scheuchzeri. In 1989, it was reclassified as Macroneuropteris scheuchzeri. This specimen looks like Neuropteris loschi Kingdom: Plantae Division: †Pteridospermatophyta Order: †Medullosales Family: †Neurodontopteridaceae Genus: †Neuropteris -
From the album: MY FOSSIL Collection - Dpaul7
Calamites Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites *Note: Photos 1, 2 and 3 show obverse; photo 4 reverse. Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites *Note: Photos 1, 2 and 3 show obverse; photo 4 reverse. Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites *Note: Photos 1, 2 and 3 show obverse; photo 4 reverse. Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites *Note: Photos 1, 2 and 3 show obverse; photo 4 reverse. Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites *Note: Photo 1 & 2 show obverse; photo 3 shows reverse. Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites *Note: Photo 1 & 2 show obverse; photo 3 shows reverse. Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites *Note: Photo 1 & 2 show obverse; photo 3 shows reverse. Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Calamites Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) A number of organ taxa have been identified as part of a united organism, which has inherited the name Calamites in popular culture. Calamites correctly refers only to casts of the stem of Carboniferous/Permian sphenophytes, and as such is a form genus of little taxonomic value. There are two forms of casts, which can give mistaken impressions of the organisms. The most common is an internal cast of the hollow (or pith-filled) void in the centre of the trunk. This can cause some confusion: firstly, it must be remembered that a fossil was probably surrounded with 4-5 times its width in (unpreserved) vascular tissue, so the organisms were much wider than the internal casts preserved. Further, the fossil gets narrower as it attaches to a rhizoid, a place where one would expect there to be the highest concentration of vascular tissue (as this is where the peak transport occurs). However, because the fossil is a cast, the narrowing in fact represents a constriction of the cavity, into which vascular tubes encroach as they widen. Further organ genera belonging to sphenophytes include: (1) Arthropitys (stems which are preserved in a mineralised form (2) Astromyelon (permineralised rhizomes, distinguished from Arthropitys by the absence of a carinal canal) (3) Annularia and Asterophylites (form genera of leaf-whorls which are paraphyletic). This is possibly Calamites suckowi. Kingdom: Plantae Phylum: Pteridophyta Class: Equisetopsida Order: Equisetales Family: †Calamitaceae Genus: †Calamites -
From the album: MY FOSSIL Collection - Dpaul7
Artisia fossil Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) Artisia - the pith cast of Cordaites. In The Fossil Flora of Great Britain, or figures and descriptions of the vegetable remains found in a fossil state in this country - John Lindley, Wlliam Hutton, Volume III, 1837 were described similar ones as Sternbergia. Sternbergia angulosa Artis Antedil. phytol. t. 8. and Sternbergia approximata Ad. Brongn. Prodr. p. 137. " When the integuaient of coal is broken off, these plants are sometimes found simply marked by horizontal depressed lines, which meet alternately from opposite sides anastomozing in the middle ; but in other cases the space between the lines is excavated into deep furrows, and honey-combed as it were by the formation of short perpendicular bars which connect the lines ; traces also may be found of lines running along the sides of the stem for a considerable distance. The result of this is that many stems appear as if they were composed of horizontal plates, about l-16th of an inch apart and held together by some connection in the axis of the stem : a most extraordinary appearance, to which we know of no parallel, and which we are by no means prepared to say is their real structure. " Cordaites is an important genus of extinct gymnosperms which grew on wet ground similar to the Everglades in Florida. Kingdom: Plantae Division: Pinophyta Class: Pinopsida Order: Cordaitales Family: Cordaitaceae Genus: Cordaites -
From the album: MY FOSSIL Collection - Dpaul7
Artisia fossil Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) Artisia - the pith cast of Cordaites. In The Fossil Flora of Great Britain, or figures and descriptions of the vegetable remains found in a fossil state in this country - John Lindley, Wlliam Hutton, Volume III, 1837 were described similar ones as Sternbergia. Sternbergia angulosa Artis Antedil. phytol. t. 8. and Sternbergia approximata Ad. Brongn. Prodr. p. 137. " When the integuaient of coal is broken off, these plants are sometimes found simply marked by horizontal depressed lines, which meet alternately from opposite sides anastomozing in the middle ; but in other cases the space between the lines is excavated into deep furrows, and honey-combed as it were by the formation of short perpendicular bars which connect the lines ; traces also may be found of lines running along the sides of the stem for a considerable distance. The result of this is that many stems appear as if they were composed of horizontal plates, about l-16th of an inch apart and held together by some connection in the axis of the stem : a most extraordinary appearance, to which we know of no parallel, and which we are by no means prepared to say is their real structure. " Cordaites is an important genus of extinct gymnosperms which grew on wet ground similar to the Everglades in Florida. Kingdom: Plantae Division: Pinophyta Class: Pinopsida Order: Cordaitales Family: Cordaitaceae Genus: Cordaites -
From the album: MY FOSSIL Collection - Dpaul7
Artisia fossil Rt 56 Bypass, Johnstown, Pennsylvania, USA Pennsylvanian Period (290-330 Million Years Ago) Artisia - the pith cast of Cordaites. In The Fossil Flora of Great Britain, or figures and descriptions of the vegetable remains found in a fossil state in this country - John Lindley, Wlliam Hutton, Volume III, 1837 were described similar ones as Sternbergia. Sternbergia angulosa Artis Antedil. phytol. t. 8. and Sternbergia approximata Ad. Brongn. Prodr. p. 137. " When the integuaient of coal is broken off, these plants are sometimes found simply marked by horizontal depressed lines, which meet alternately from opposite sides anastomozing in the middle ; but in other cases the space between the lines is excavated into deep furrows, and honey-combed as it were by the formation of short perpendicular bars which connect the lines ; traces also may be found of lines running along the sides of the stem for a considerable distance. The result of this is that many stems appear as if they were composed of horizontal plates, about l-16th of an inch apart and held together by some connection in the axis of the stem : a most extraordinary appearance, to which we know of no parallel, and which we are by no means prepared to say is their real structure. " Cordaites is an important genus of extinct gymnosperms which grew on wet ground similar to the Everglades in Florida. Kingdom: Plantae Division: Pinophyta Class: Pinopsida Order: Cordaitales Family: Cordaitaceae Genus: Cordaites -
It was VERY warm for February in Pennsylvania - So, a few minutes walk from my home, I went for some fossils. It rained once I got there, so I did NOT get to the "best" sport, but I did manage to get these and a few more! I am wondering... What is the best way to clean them? And any recommendations to "stabilize" them? The slate can be a bit brittle. Clear spray shellac-type material? Thanks for looking! This area has neuropteris, pecopteriss, calamites, sigillaria, lepidodendron, ginko leaves and all the other usual suspects! Hoping for more warm days... And I think we will have them!
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Ptychocarpus unitus, with partial Alethopteris 0.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Ptychocarpus unitus, with partial Alethopteris Upper Sharp Mountain Mbr-Pottsville Formation of Pennsylvania Pennsylvanian Period (323.2 million years ago to 298.9 million years ago) This Ptychocarpus unitus measures 2" long and is on a matrix measuring 1 3/4" by 3 1/4". There's a nice partial Alethopteris on the reverse side. Alethopteris is a prehistoric plant genus of fossil Pteridospermatophyta (seed ferns) that existed in the Carboniferous period (around 360 to 300 million years ago). It is in the family Alethopteridaceae. Kingdom: Plantae/Plantae Division: Tracheophyta/†Pteridospermatophyta Order: Marattiales/†Medullosales Family: Marattiaceae/ †Alethopteridaceae Genus: Ptychocarpus/†Alethopteris Species: unitas/sp.
