Najaceras (original) (raw)
Najaceras is a genus of straight, slender endocerid known only from the Whiterockian age Oil Creek Limestone of Oklahoma, introduced and named by Rousseau Flower in 1971 and further described by him in 1976. The genus Najaceras is based on Najaceras triangulatum (Flower, 1971) which comes from the Oil Creek Limestone on West Spring Creek, 3 miles east of Pooleville, Oklahoma. The holotype and paratype are at the U.S. National Museum. Two other species from the same area have been identified and named: N. bilobatum, and N. chevroniferum (Flower, 1976).
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| dbo:abstract | Najaceras is a genus of straight, slender endocerid known only from the Whiterockian age Oil Creek Limestone of Oklahoma, introduced and named by Rousseau Flower in 1971 and further described by him in 1976. Najaceras is characterized by a longitudinal mound of material that runs forward from the apical region along the inside of the top of the siphuncle known as a dorsal process. This process, which is somewhat broad in aspect, is concave ventrally. The opening between the dorsal process and the forms a dorsally concave crescent shape. The process is bisected in the lower port by which is known as a blade which bifurcates upwardly from about the middle. The genus Najaceras is based on Najaceras triangulatum (Flower, 1971) which comes from the Oil Creek Limestone on West Spring Creek, 3 miles east of Pooleville, Oklahoma. The holotype and paratype are at the U.S. National Museum. Two other species from the same area have been identified and named: N. bilobatum, and N. chevroniferum (Flower, 1976). Najaceras probably gave rise to the similar Meniscoceras which also has a dorsal process. Based on that unique feature the two are placed in their own family, the . Najaceras comes from "naja", the word for the crescent at the bottom of the Navajo squash blossom or wedding necklace. (en) |
| dbo:wikiPageID | 14461081 (xsd:integer) |
| dbo:wikiPageLength | 2279 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1010379758 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Meniscoceras dbc:Nautiloids dbr:Genus dbr:Endocerida dbc:Taxa_named_by_Rousseau_H._Flower dbr:Paratype dbc:Ordovician_animals_of_North_America dbc:Prehistoric_cephalopod_genera dbr:Holotype dbr:Pooleville,_Oklahoma dbr:Navajo_people dbr:Ordovician dbr:Siphuncle dbr:Rousseau_Flower dbr:Whiterockian dbr:Najaceratidae dbr:Endocone |
| dbp:authority | Flower, 1971 (en) |
| dbp:fossilRange | Middle Ordovician (en) |
| dbp:subdivision | * N. bilbatum * N. chevroniferum (Flower, 1976) (en) |
| dbp:subdivisionRanks | Other species (en) |
| dbp:taxon | Najaceras (en) |
| dbp:typeSpecies | Najaceras triangulatum (en) |
| dbp:typeSpeciesAuthority | Flower, 1971 (en) |
| dbp:wikiPageUsesTemplate | dbt:Automatic_taxobox dbt:Reflist dbt:Short_description dbt:Taxonbar |
| dcterms:subject | dbc:Nautiloids dbc:Taxa_named_by_Rousseau_H._Flower dbc:Ordovician_animals_of_North_America dbc:Prehistoric_cephalopod_genera |
| gold:hypernym | dbr:Endocerid |
| rdf:type | dbo:Mollusca yago:Animal100015388 yago:Cephalopod101968315 yago:Invertebrate101905661 yago:LivingThing100004258 yago:Mollusk101940736 yago:Object100002684 yago:Organism100004475 yago:PhysicalEntity100001930 yago:Whole100003553 yago:WikicatPrehistoricCephalopods umbel-rc:Mollusk |
| rdfs:comment | Najaceras is a genus of straight, slender endocerid known only from the Whiterockian age Oil Creek Limestone of Oklahoma, introduced and named by Rousseau Flower in 1971 and further described by him in 1976. The genus Najaceras is based on Najaceras triangulatum (Flower, 1971) which comes from the Oil Creek Limestone on West Spring Creek, 3 miles east of Pooleville, Oklahoma. The holotype and paratype are at the U.S. National Museum. Two other species from the same area have been identified and named: N. bilobatum, and N. chevroniferum (Flower, 1976). (en) |
| rdfs:label | Najaceras (en) |
| owl:sameAs | freebase:Najaceras yago-res:Najaceras wikidata:Najaceras https://global.dbpedia.org/id/4sRuL |
| prov:wasDerivedFrom | wikipedia-en:Najaceras?oldid=1010379758&ns=0 |
| foaf:isPrimaryTopicOf | wikipedia-en:Najaceras |
| is dbo:wikiPageWikiLink of | dbr:Meniscoceras dbr:Arenig dbr:List_of_prehistoric_nautiloid_genera dbr:Allocotoceras dbr:Allotrioceras |
| is foaf:primaryTopic of | wikipedia-en:Najaceras |