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Showing results for tags 'spyroceras'.
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New Identification Posters for Common Hamilton Group Cephalopods
Bringing Fossils to Life posted a topic in General Fossil Discussion
I just made new ID posters for Hamilton Group Cephaloods - one for Nautiloids and Bactritoids, and one for ammonoids. The reconstructions are either new or updated for accuracy. Color patterns on the first picture are based on close relatives. If anyone has any suggestions, please let me know - I want these to be as useful as possible.- 6 replies
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From the album: Mahantango Formation
Spyroceras-
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From the album: Middle Devonian in Central New York
Spyroceras nuntium Middle Devonian Hamilton Group Moscow Formation Windom Shale Deep Springs Road Lebanon, New York Collected 7/18/20-
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Hi we've found these fossils in buffalo ny and based only on google searches we see resemblance with eurepterids as well as straight shelled nautiloids. Any help would be greatly appreciated. The photos shown are all different fossils I have them labeled a through c to make identification discussions easier. Thankyou in advance, we're learning!
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Cephalopods-Mississippian-Period-Spyroceras-in-Matrix.JPG
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Spyroceras Cephalopod in Matrix Chesterian Zone of the Bangor Limestone Formation in northern Alabama Mississippian Period (ca 325,000,000 years old) Spyroceras is a genus of pseudorthocerids from the Devonian of North America and Europe, defined by Hyatt in 1884. Pseudorthocerids are a kind of orthocertaoid, a taxonomic group within the Nautiloidea. Spyroceras had annulated orthocones with straight transverse sutures, transverse or slightly oblique surface annulations, and faintly cyrtoconic apeces Surface ornamentation varies but longitudinal lirae are conspicuous from earliest stage. The siphuncle was central or slightly offset ventrally, and composed of expanded segments typical of the Pseudorthocerida. Cameral and siphonal deposits developed later than in most pseudorthocerids and are thus confined to the apical portion of the phragmocone. Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Order: Pseudorthocerida Family: Spyroceratidae Genus: Spyroceras-
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From the album: MY FOSSIL Collection - Dpaul7
Spyroceras Cephalopod in Matrix Chesterian Zone of the Bangor Limestone Formation in northern Alabama Mississippian Period (ca 325,000,000 years old) Spyroceras is a genus of pseudorthocerids from the Devonian of North America and Europe, defined by Hyatt in 1884. Pseudorthocerids are a kind of orthocertaoid, a taxonomic group within the Nautiloidea. Spyroceras had annulated orthocones with straight transverse sutures, transverse or slightly oblique surface annulations, and faintly cyrtoconic apeces Surface ornamentation varies but longitudinal lirae are conspicuous from earliest stage. The siphuncle was central or slightly offset ventrally, and composed of expanded segments typical of the Pseudorthocerida. Cameral and siphonal deposits developed later than in most pseudorthocerids and are thus confined to the apical portion of the phragmocone. Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Order: Pseudorthocerida Family: Spyroceratidae Genus: Spyroceras-
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From the album: Nautiloidea
4cm. long. A gift from Jeffrey P. Windom Member, Moscow Formation, Givet, Middle Devon. From the Deep Springs Rd. quarry, Lebanon, NY.- 2 comments
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Photographed by Jay A. Wollin © 2016
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