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Masonoceras ✝
Description | Masonoceras is a genus of Karagondoceratids from Lower Mississippian strata, the shell of which is thinly subdiscoidal to discoidal with an acute ventral margin in late ontogeny. Whorls are strongly embracing, umbilicus narrow to occluded. The mature external suture contains a wide trifid ventral lobe, the flanking prongs longer that the medial, an asymmetrically rounded lateral saddle and a deeper asymmetric pointed lateral lobe. Internal molds of the type, Mesoceras Kentuckiense show presence of a broad hyponomic sinus flanked by high rounded vantrolateral salients. From Wikipedia article at https://en.wikipedia.org/wiki/Masonoceras, which is released under the Creative Commons Attribution-Share-Alike License 3.0. | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Source Data |
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Rank | genus | |||||||||||||||||||||||||||||||||||||||||||||||||||
Taxonomy (GBIF) | Life : Animalia : Mollusca : Cephalopoda : Ammonoidea : Masonoceras | |||||||||||||||||||||||||||||||||||||||||||||||||||
Taxonomy (PBDB) | Life : Animalia : Mollusca : Cephalopoda : Goniatitida : Karagandoceratidae : Masonoceras | |||||||||||||||||||||||||||||||||||||||||||||||||||
Taxonomic Status (GBIF) | accepted | |||||||||||||||||||||||||||||||||||||||||||||||||||
Classification (PBDB,GBIF) |
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Scientific Name | Masonoceras Work & Manger, 2002 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Name Published In | J Paleontol 76 (3), May | |||||||||||||||||||||||||||||||||||||||||||||||||||
Opinions (PBDB) |
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Status (PBDB) | extinct | |||||||||||||||||||||||||||||||||||||||||||||||||||
Taxon Size (PBDB) | 4 | |||||||||||||||||||||||||||||||||||||||||||||||||||
First Recorded Appearance | 354 - 345 Ma Carboniferous | |||||||||||||||||||||||||||||||||||||||||||||||||||
Last Recorded Appearance | 354 - 345 Ma Carboniferous | |||||||||||||||||||||||||||||||||||||||||||||||||||
Motility | fast-moving (based on Ammonoidea) | |||||||||||||||||||||||||||||||||||||||||||||||||||
Vision | well-developed (based on Cephalopoda) | |||||||||||||||||||||||||||||||||||||||||||||||||||
Diet | carnivore (based on Ammonoidea) | |||||||||||||||||||||||||||||||||||||||||||||||||||
Taphonomy | aragonite (based on Goniatitida) | |||||||||||||||||||||||||||||||||||||||||||||||||||
Primary Reference (PBDB) | D. M. Work and W. L. Manger. 2002. Masonoceras, a new karagandoceratid ammonoid from the lower Mississippian (Lower Osagean) of Kentucky. Journal of Paleontology 76(3):574-577 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Wikipedia | https://en.wikipedia.org/wiki/Masonoceras |
Fossil Distribution
Subtaxa
Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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Masonoceras bradfordi ✝ species | accepted (GBIF) listed (PBDB) | ||||
Masonoceras kentuckiense ✝ species | accepted (GBIF) listed (PBDB) | 5 | 354 Ma Carboniferous | 354 Ma Carboniferous | |
Masonoceras rugilobatum ✝ species | accepted (GBIF) listed (PBDB) |
Synonymy List
Year | Name and Author |
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2002 | Masonoceras Work and Manger |
2006 | Masonoceras Korn |
2009 | Masonoceras Furnish et al. p. 11 |
References
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!