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Genus of molluscs (fossil)
Placenticeras is a genus of ammonites from the Late Cretaceous. Its fossils have been found in Asia, Europe, North and South America. Placenticeras, named
Placenticeras
Species of mollusc (fossil)
Placenticeras meeki is an ammonite species from the Late Cretaceous. These cephalopods were fast-moving nektonic carnivores. They mainly lived in the
Placenticeras_meeki
Opal-like organic gemstone
fossil shells of the Upper Cretaceous disk-shaped ammonites Placenticeras meeki and Placenticeras intercalare, and (to a lesser degree) the cylindrical baculite
Ammolite
Geologic age in the Late Cretaceous
marroti / Hoplitoplacenticeras vari zone of Delawarella delawarensis zone of Placenticeras bidorsatum During the Campanian age, a radiation among dinosaur species
Campanian
Extinct marine lizards of the Late Cretaceous
been found in fossil shells of some ammonites, mainly Pachydiscus and Placenticeras. These were once interpreted as a result of limpets attaching themselves
Mosasaur
Geologic formation in North America
famous for its well-preserved ammonite fossils. These include Placenticeras meeki, Placenticeras intercalare, Hoploscaphites, and Sphenodiscus, the baculite
Bearpaw_Formation
Fourth age of the Late Cretaceous epoch
domain the Santonian is coeval with a single ammonite biozone: that of Placenticeras polyopsis. Biostratigraphy based on inoceramids, nanoplankton or forams
Santonian
Cretaceous marine turtle and the largest turtle ever discovered
includes a variety of mollusks, namely ammonites–from the Pierre Shale Placenticeras placenta, Scaphites nodosus, Didymoceras, and Baculites ovatus–bivalves–such
Archelon
Uppermost member of the Belly River Group geologic unit in Alberta, Canada
Goniobasis (3 species) Hydrobia Lioplacodes (2 species) Marine Invertebrates Placenticeras sp. Palaeonephrops? (a clawed lobster) The following plant body fossils
Dinosaur_Park_Formation
severnensis Ostrea Panopea †Paralbula † Paranomia Pholadomya †Pinna †Placenticeras †Placenticeras benningi †Platecarpus Polinices †Prognathodon †Protocardia †Pseudocorax
List of the prehistoric life of Georgia (U.S. state)
List_of_the_prehistoric_life_of_Georgia_(U.S._state)
Kauffman and Robert Kesling reported a fossil ammonite of the genus Placenticeras exhibiting damage they interpreted as tooth marks from a mosasaur, probably
Timeline_of_mosasaur_research
Paleontological research in the U.S. state of Wisconsin
Formation and dating to the epoch of the Late Cretaceous, including Placenticeras pseudoplacenta and Scaphites carlilensis. However, a 2021 study of gastroliths
Paleontology_in_Wisconsin
Genus of molluscs (fossil)
lower part of the Upper Cretaceous and precursor of the overall similar Placenticeras. The shell is compressed, with flat or slightly convex sides and narrow
Proplacenticeras
†Naomichelys †Nostoceras †Nostoceras approximans †Pachydiscus Panopea †Placenticeras †Platecarpus †Protocardia †Pteria †Pterotrigonia †Pterotrigonia thoracica
List of the prehistoric life of Arkansas
List_of_the_prehistoric_life_of_Arkansas
†Pholadomya belviderensis Pinus †Pinus longifolius †Pirsila †Placenticeras †Placenticeras meeki Platanus †Platecarpus †Platecarpus planifrons – type locality
List of the Mesozoic life of Kansas
List_of_the_Mesozoic_life_of_Kansas
species Pholadidea – tentative report Pholadomya Phyllodus †Pinna †Placenticeras – tentative report †Placerias †Placerias hesternus †Platecarpus †Plinthogomphodon
List of the prehistoric life of North Carolina
List_of_the_prehistoric_life_of_North_Carolina
†Phelopteria linguiformis Pholas †Pinna †Pinna laqueata †Placenticeras †Placenticeras placenta †Placenticeras syrtale †Platananthus †Platananthus potomacensis
List of the Mesozoic life of Maryland
List_of_the_Mesozoic_life_of_Maryland
Odontaspis †Osteopygis Panopea †Paralbula †Peritresius Pholas †Pinna †Placenticeras †Pleurocoelus – type locality for genus †Pleurocoelus nanus – type locality
List of the prehistoric life of Maryland
List_of_the_prehistoric_life_of_Maryland
unidentified related form or using admittedly obsolete nomenclature †Placenticeras †Placenticeras cumminsi †Plagiostoma †Planicoxa – type locality for genus †Planicoxa
List of the prehistoric life of Utah
List_of_the_prehistoric_life_of_Utah
locality for species Pholadomya †Pinna †Placenticeras †Placenticeras cumminsi †Placenticeras meeki †Placenticeras pseudoplacenta †Planolites Platanus †Platecarpus
List of the prehistoric life of New Mexico
List_of_the_prehistoric_life_of_New_Mexico
Geological formation in the United States
plerucostatum N. (Nostoceras) pulcher Oxybeloceras O. crassum Pachydiscus Placenticeras Alatacythere A. ponderosana Bairdoppilata B. rotunda Brachycythere B
Annona_Chalk
†Piestochilus curviliratus Pinna †Pinna laqueata †Placenticeras †Placenticeras placenta †Placenticeras syrtale †Plagiostoma †Plagiostoma woodsi †Platecarpus
List of the Mesozoic life of Mississippi
List_of_the_Mesozoic_life_of_Mississippi
Geologic formation in south central Utah, USA
P. shoshonensis (Meek) John Henry Member Peterson, 1969 Cephalopoda Placenticeras sp. John Henry Member Peterson, 1969 Cephalopoda Scaphites sp. John
Straight_Cliffs_Formation
Geologic formation in North America
Uppermost DeGrey Formation. Specimens associated with Globidens schurmanni. Placenticeras P. intercalere Bowman County, North Dakota. "One decorticated specimen
Pierre_Shale
†Pinuspollenites megasaccus – type locality for species †Placenticeras †Placenticeras placenta †Placenticeras syrtale – tentative report †Plagiostoma †Plagiostoma
List of the Mesozoic life of New Jersey
List_of_the_Mesozoic_life_of_New_Jersey
Geological formation in Uzbekistan
Molluscs of the Aitym Formation Genus Species Location Notes Images Placenticeras P. kyzylkumense A placenticeratid ammonite
Aitym_Formation
Genus of molluscs (fossil)
also the direct ancestor of Late Cretaceous placenticeratids such as Placenticeras and Hypengonoceras. Sepkoski, Jack (2002). "Sepkoski's Online Genus
Karamaites
protexta Phacoides †Phacoides mattiformis Pholadomya †Pinna †Placenticeras †Placenticeras benningi †Platecarpus †Pleuriocardia †Pleuriocardia eufalensis
List of the Mesozoic life of Georgia (U.S. state)
List_of_the_Mesozoic_life_of_Georgia_(U.S._state)
Pholadomya †Pholadomya coloradensis †Pholadomya coloradoensis †Pinna †Placenticeras †Placenticeras pseudoplacenta Polinices †Polinices concinna †Prionocyclus †Prionocyclus
List of the prehistoric life of Minnesota
List_of_the_prehistoric_life_of_Minnesota
eriensis †Pistia †Pistia corrugata †Placenticeras †Placenticeras intercalare †Placenticeras meeki †Placenticeras pseudoplacenta †Plagiostoma †Plagiostoma
List of the Mesozoic life of Wyoming
List_of_the_Mesozoic_life_of_Wyoming
published by Tajika et al. (2025). Description of fossil material of Placenticeras costatum and P. meeki from the Maastrichtian strata from the Raton Basin
2025_in_paleomalacology
Family of mollusc (fossil)
Albian–Turonian PreꞒ Ꞓ O S D C P T J K Pg N Herrickiceras costatus (Placenticeras costatum) Scientific classification Kingdom: Animalia Phylum: Mollusca
Coilopoceratidae
†Phyloblatta †Phyloblatta grimaldii – type locality for species †Pinna †Placenticeras – tentative report †Placerias †Placerias hesternus †Platananthus †Platananthus
List of the Mesozoic life of North Carolina
List_of_the_Mesozoic_life_of_North_Carolina
Pictonia Pimelites Pinaclymenia Pinacoceras Pinacoplacites Piriclymenia Placenticeras Placites Planammatoceras Planisphinctes Plasmatoceras Platotropites
List_of_ammonite_genera
Pholas – tentative report †Pinna †Pinna laqueata †Placenticeras †Placenticeras placenta †Placenticeras syrtale †Pleuriocardia – or unidentified related
List of the Mesozoic life of Delaware
List_of_the_Mesozoic_life_of_Delaware
or using admittedly obsolete nomenclature †Pistia corrugata †Placenticeras †Placenticeras pseudoplacenta †Platanites †Platanites marginata Platanus †Platanus
List of the Mesozoic life of South Dakota
List_of_the_Mesozoic_life_of_South_Dakota
Pholadomya †Pholadomya occidentalis †Pholadomya tippana †Pinna †Placenticeras †Placenticeras benningi †Plagiostoma †Platecarpus Plicatula Polinices †Polycotylus
List of the prehistoric life of Alabama
List_of_the_prehistoric_life_of_Alabama
†Pholadomya occidentalis Pholas †Phymosoma †Phytosaurus †Pinna Pitar †Placenticeras †Placenticeras meeki †Planocephalosaurus †Platecarpus †Platecarpus planifrons
List of the prehistoric life of Texas
List_of_the_prehistoric_life_of_Texas
†Phlycticrioceras trinodosus †Pinna †Placenticeras †Placenticeras meeki †Placenticeras placentum †Placenticeras syrtale †Plastomenus – tentative report
List of the Mesozoic life of Colorado
List_of_the_Mesozoic_life_of_Colorado
Genus of algae (fossil)
Turonian 93.5–89.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N Herrickiceras costatus (Placenticeras costatum) Scientific classification Kingdom: Animalia Phylum: Mollusca
Herrickiceras
†Pirsila tensa Pitar †Pitar yoakumi †Placenticeras †Placenticeras interealare †Placenticeras meeki †Placenticeras syrtale Placopsilina †Placopsilina minima
List of the Mesozoic life of Texas
List_of_the_Mesozoic_life_of_Texas
locality for genus †Pecten †Permocalculus Pholadomya Physa †Pinna †Placenticeras †Placenticeras cumminsi †Placerias – type locality for genus †Placerias hesternus
List of the prehistoric life of Arizona
List_of_the_prehistoric_life_of_Arizona
Panopea †Paranomia Pecten Pholadomya †Pholadomya occidentalis Pinna †Placenticeras †Plagiostoma †Platecarpus – type locality for genus †Platecarpus tympaniticus
List of the prehistoric life of Mississippi
List_of_the_prehistoric_life_of_Mississippi
alexi – type locality for species †Pecten Pholadomya Pinus †Placenticeras †Placenticeras meeki Platanus †Platecarpus †Platecarpus planifrons – type locality
List of the prehistoric life of Kansas
List_of_the_prehistoric_life_of_Kansas
†Parviraptor †Pentaceratops †Pentaceratops sternbergii †Pinna †Placenticeras †Placenticeras meeki †Platyceramus †Platyceramus ahsenensis †Platyceramus cycloides
List of the prehistoric life of Colorado
List_of_the_prehistoric_life_of_Colorado
†Piceoerpeton Pinna Pinus Pistacia †Pistia †Placenticeras †Placenticeras intercalare †Placenticeras meeki †Placenticeras pseudoplacenta †Plagiostoma Planorbis
List of the prehistoric life of Wyoming
List_of_the_prehistoric_life_of_Wyoming
Family of molluscs (fossil)
the Early Cretaceous, starting with Hypengonoceras. The type genus, Placenticeras, appears later and is known from the upper Santonian to the lower Campanian
Placenticeratidae
Pholadomya †Pholadomya occidentalis Pholas – tentative report †Pinna †Placenticeras Plicatula †Pseudocorax †Pteranodon – tentative report †Pteria †Pterotrigonia
List of the prehistoric life of Delaware
List_of_the_prehistoric_life_of_Delaware
†Pecten †Peritresius Pholadomya †Pholadomya occidentalis Pholas †Pinna †Placenticeras †Plagiostoma †Plesiosaurus Plicatula †Plioplatecarpus †Plioplatecarpus
List of the prehistoric life of New Jersey
List_of_the_prehistoric_life_of_New_Jersey
genus Caseyella. A study on the morphological variation of specimens of Placenticeras from the Upper Cretaceous strata of the eastern Gulf Coastal Plain (mostly
2024_in_paleomalacology
Geologic formation in the western US
produce shells and casts from clams, ammonites (including possible Placenticeras), snails, and shark's teeth. Trace fossils classified as Ophiomorpha
Cliff_House_Sandstone
admittedly obsolete nomenclature †Pistia corrugata †Pityoxylon †Placenticeras †Placenticeras cumminsi Placopsilina †Plagioglypta †Plagiostoma †Plagiostoma
List of the Mesozoic life of Utah
List_of_the_Mesozoic_life_of_Utah
densicostatus Submortoniceras tequesquitense Inoceramus undulatuplicatus Placenticeras planum Eutrephoceras dekayi Eutrephoceras alcesense Baculites sp. Exogyra
Ojinaga_Formation
unidentified related form or using admittedly obsolete nomenclature †Placenticeras †Placenticeras pseudoplacenta Platanus †Platecarpus †Platecarpus somenensis
List of the prehistoric life of South Dakota
List_of_the_prehistoric_life_of_South_Dakota
Z †Pachydiscus †Pachydiscus arkansanus Panopea †Panopea subplicata †Placenticeras †Platecarpus †Pleuriocardia †Prionochelys – type locality for genus
List of the Mesozoic life of Arkansas
List_of_the_Mesozoic_life_of_Arkansas
occidentalis †Pholadomya tippana †Piestochilus †Pinna †Pinna laqueata †Placenticeras †Placenticeras benningi †Plagiostoma †Plagiostoma woodsi – tentative report
List of the Mesozoic life of Alabama
List_of_the_Mesozoic_life_of_Alabama
kauffmani – type locality for species †Pinna petrina †Pirsilia †Placenticeras †Placenticeras cumminsi †Placerias – type locality for genus †Placerias hesternus
List of the Mesozoic life of Arizona
List_of_the_Mesozoic_life_of_Arizona
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