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Showing results for tags 'cambrian period'.
Found 10 results
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Amateur fossil find 30 years ago leads to crucial evolutionary discovery today
OutrageousFennel posted a topic in Fossil News
A family of amateur fossil hunters from Utah -- the Gunthers -- found this fascinating fossil in the Spence Gulch shale part of Utah in 1992, and shared it with Richard Robison at the University of Kansas. The mystery of what it was went unsolved for nearly 30 years, until a team at Ohio State uncovered the telltale circle that showed the creature had attached to a shelly surface via a basal disc. It's the earliest/one of the earliest known specimens of a mat-sticker making the evolutionary move to attaching to a harder surface--a leap that makes some of our modern-day echinoderms, including s-
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- haplophrentis reesei
- echinoderm
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micro organisms encased in clear glass-like "rock"
BILL GROMMES posted a topic in Micro-paleontology
We have a fist-sized glass-like object that contains 22 microscopic organisms from the Cambrian and Ordovician periods. We theorize that it was produced by a meteor impacting sand and water resulting in perfectly preserved organisms, some of which also have soft tissue preserved. We do not have equipment to investigate this object any further and are seeking someone to help validate this finding. Does anyone have knowledge of a clear glass "rock" with encapsulated 500 mya organisms ever being found? -
From the album: MY FOSSIL Collection - Dpaul7
Piochaspis sellata Trilobite Chisolm Shale, Pioche, Nevada Cambrian Period ( 541 (+/- 1) - 485.4 (+/- 1.9) million years ago) This fossil measures 1/2" long and is on a matrix measuring 1" by 5/8". Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in the second half of the Lower Cambrian, and the last species did not survive the Ordovician–Silurian extinction event. Trilobites have facial sutures that run along the margin of the glabella and/or fixigena to the shoulder point where the cephalon -
From the album: MY FOSSIL Collection - Dpaul7
Piochaspis sellata Trilobite Chisolm Shale, Pioche, Nevada Cambrian Period ( 541 (+/- 1) - 485.4 (+/- 1.9) million years ago) This fossil measures 1/2" long and is on a matrix measuring 1" by 5/8". Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in the second half of the Lower Cambrian, and the last species did not survive the Ordovician–Silurian extinction event. Trilobites have facial sutures that run along the margin of the glabella and/or fixigena to the shoulder point where the cephalon -
From the album: MY FOSSIL Collection - Dpaul7
Hypagnostus parvifrons Trilobite House Range, Marjum formation of central Utah Cambrian Period (570-540 million years ago) Trilobites of the order Agnostida are mmall trilobites (usually only a few mm long) with cephalon and pygidium strongly similar in outline and size (isopygous); enrollment typical. Cephalon: cephalic shield with deeply parabolic outline, maximum width usually anterior of genal angle, sutures proparian or lacking; border convex; glabella fusiform, widest at base (except in Condylopygidae), glabellar segmentation highly variable, sometimes complex, but in som -
From the album: MY FOSSIL Collection - Dpaul7
Hypagnostus parvifrons Trilobite House Range, Marjum formation of central Utah Cambrian Period (570-540 million years ago) Trilobites of the order Agnostida are mmall trilobites (usually only a few mm long) with cephalon and pygidium strongly similar in outline and size (isopygous); enrollment typical. Cephalon: cephalic shield with deeply parabolic outline, maximum width usually anterior of genal angle, sutures proparian or lacking; border convex; glabella fusiform, widest at base (except in Condylopygidae), glabellar segmentation highly variable, sometimes complex, but in som -
From the album: MY FOSSIL Collection - Dpaul7
Brachyaspidion microps Trilobite Wheeler formation of central Utah Cambrian Period (~507 Million Years Ago) Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in the second half of the Lower Cambrian, and the last species did not survive the Ordovician–Silurian extinction event. Trilobites have facial sutures that run along the margin of the glabella and/or fixigena to the shoulder point where the cephalon meets the thorax. These sutures outline the cranidium, or the main, central part of -
From the album: MY FOSSIL Collection - Dpaul7
Ogygopis sp. Trilobite Harkless, Nevada, USA Cambrian Period (541 - 485.4 million years ago) Ogygopsis is a genus of trilobite from the Cambrian of Antarctica and North America, specifically the Burgess Shale. It is the most common fossil in the Mt. Stephen fossil beds there, but rare in other Cambrian faunas. Its major characteristics are a prominent glabella with eye ridges, lack of pleural spines, a large spineless pygidium about as long as the thorax or cephalon, and its length: up to 12 cm. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Corynexochida Fam -
From the album: MY FOSSIL Collection - Dpaul7
Ogygopis sp. Trilobite Harkless, Nevada, USA Cambrian Period (541 - 485.4 million years ago) Ogygopsis is a genus of trilobite from the Cambrian of Antarctica and North America, specifically the Burgess Shale. It is the most common fossil in the Mt. Stephen fossil beds there, but rare in other Cambrian faunas. Its major characteristics are a prominent glabella with eye ridges, lack of pleural spines, a large spineless pygidium about as long as the thorax or cephalon, and its length: up to 12 cm. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Corynexochida Fam -
From the album: MY FOSSIL Collection - Dpaul7
Ogygopis sp. Trilobite Harkless, Nevada, USA Cambrian Period (541 - 485.4 million years ago) Ogygopsis is a genus of trilobite from the Cambrian of Antarctica and North America, specifically the Burgess Shale. It is the most common fossil in the Mt. Stephen fossil beds there, but rare in other Cambrian faunas. Its major characteristics are a prominent glabella with eye ridges, lack of pleural spines, a large spineless pygidium about as long as the thorax or cephalon, and its length: up to 12 cm. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Corynexochida Fam
