About: Hemiphragmoceratidae

An Entity of Type: Mollusk, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

Hemiphragmoceratidae is a family of endogastrically brevconic oncocerids characterized by elaborately visored apertures in which the hyponomic sinus in mature specimens is on a spout-like process and there may be lateral and dorsal salients. (Sweet 1964, Flower 1950). Shells are compressed with the apical portion curved and the anterior straight. Siphucles are nummuloideal with expanded spheroidal segments and continuously actinosiphonate interiors. Some five genera have been described; , , Hexameroceras, Octamerella, and .

Property Value
dbo:abstract
  • Hemiphragmoceratidae is a family of endogastrically brevconic oncocerids characterized by elaborately visored apertures in which the hyponomic sinus in mature specimens is on a spout-like process and there may be lateral and dorsal salients. (Sweet 1964, Flower 1950). Shells are compressed with the apical portion curved and the anterior straight. Siphucles are nummuloideal with expanded spheroidal segments and continuously actinosiphonate interiors. The Hemiphragmoceratidae are probably descended from the Oncoceratidae and are known from the middle and upper Silurian but may range into the middle Devonian (Sweet 1964). They are similar with regards to their constricted and ornate apertures to the middle Silurian exogastric Trimeroceratidae and the Siluro-devonian discosorid Phragmoceratidae (Teichert 1964) Some five genera have been described; , , Hexameroceras, Octamerella, and . (en)
dbo:wikiPageID
  • 24539731 (xsd:integer)
dbo:wikiPageLength
  • 2088 (xsd:nonNegativeInteger)
dbo:wikiPageRevisionID
  • 1095567108 (xsd:integer)
dbo:wikiPageWikiLink
dbp:authority
  • Foeste (en)
dbp:fossilRange
  • Mid Silurian -?Mid Devonian (en)
dbp:subdivision
  • *Hemiphragmoceras *Contradoceras *Hexameroceras *Octamerella *Tetrameraoceras (en)
dbp:subdivisionRanks
  • Genera (en)
dbp:taxon
  • Hemiphragmoceratidae (en)
dbp:wikiPageUsesTemplate
dcterms:subject
gold:hypernym
rdf:type
rdfs:comment
  • Hemiphragmoceratidae is a family of endogastrically brevconic oncocerids characterized by elaborately visored apertures in which the hyponomic sinus in mature specimens is on a spout-like process and there may be lateral and dorsal salients. (Sweet 1964, Flower 1950). Shells are compressed with the apical portion curved and the anterior straight. Siphucles are nummuloideal with expanded spheroidal segments and continuously actinosiphonate interiors. Some five genera have been described; , , Hexameroceras, Octamerella, and . (en)
rdfs:label
  • Hemiphragmoceratidae (en)
owl:sameAs
prov:wasDerivedFrom
foaf:isPrimaryTopicOf
is dbo:family of
is dbo:wikiPageWikiLink of
is dbp:familia of
is foaf:primaryTopic of
Powered by OpenLink Virtuoso    This material is Open Knowledge     W3C Semantic Web Technology     This material is Open Knowledge    Valid XHTML + RDFa
This content was extracted from Wikipedia and is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License