Trimeroceratidae

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m (Protected "Trimeroceratidae" ([move=sysop] (indefinite)))
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[[Trimeroceratidae|<==]]Trimeroceratidae
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<u>Systematic Paleontology</u> <br/>
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    |--''Clathroceras'' Foerste 1926 S64
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Class: [[Cephalopoda]] <br/>
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    |    `--*''C. sulcatum'' (Barrande 1865) [=''Phragmoceras sulcatum''] S64
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Subclass: [[Nautiloidea]] <br/>
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    |--''Eotrimeroceras'' Foerste 1928 S64
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Order: [[Oncocerida]]  <br/>
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    |    `--*''E. jupiterense'' Foerste 1928 S64
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Family: Trimeroceratide
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    |--''Pentameroceras'' Hyatt 1884 S64
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    |    `--*''P. mirum'' (Barrande 1865) [=''Gomphoceras mirum''] S64
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    |--''Trimeroceras'' Hyatt 1884 S64
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    |    |--*''T. staurostoma'' (Barrande 1865) [=''Gomphoceras staurostoma''] S64
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    |    `--''T. gilberti'' Kindle & Breger 1904
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    |--''Inversoceras'' Hedström 1917 S64
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    |    |--*''I. perversum'' (Barrande 1865) S64 [=''Phragmoceras perversum'' S64; incl. ''I. constrictum'' T64]
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    |    `--''I. percurvatum'' [incl. ''I. barrandei''] T64
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    `--''Stenogomphoceras'' Foerste 1930 S64
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        |--*''S. chadwicki'' Foerste 1930 S64
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        |--''S. contractum'' Foerste 1930 P68
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        |--''S. gracile'' Foerste 1930 P68
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        `--''S. inflatum'' Foerste 1930 P68
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<nowiki>*</nowiki> Type species of generic name indicated
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The Trimeroceratidae is a family of Middle [[Silurian]] [[Oncocerida|oncocerids]] characerized in general by compressed exogastric breviconas with a slender, empty siphucle, visored aperture, and a mature peristome with a median dorsal sinus.
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==References==
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Trimeroceratidae superficially resemble the [[Hemiphragmoceratidae]] but instead have slender siphuncles without actinosiphonate deposits and shell curved exogastrically upward contrasting with the downward endogastric curvature characterisitc of the Hemiphramoceratidae
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[P68] Purnell, L. R. 1968. Catalog of the Type Specimens of Invertebrate Fossils. Part I: Paleozoic Cephalopoda. ''United States National Museum Bulletin'' 262: 1-198.
 
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[S64] Sweet, W. C. 1964. Nautiloidea Oncocerida. In ''Treatise on Invertebrate Paleontology'' pt. K. ''Mollusca 3. Cephalopoda – General Features – Endoceratoidea – Actinoceratoidea – Nautiloidea – Bactritoidea'' (R. C. Moore, ed.) pp. K277-K319. The Geological Society of America and the University of Kansas Press.
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==References==
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Walter C. Sweet, 1964. Nautiloidea- Oncocerida. Treatise on Invertebrate Paleontology, Part K, Mollsca 3. Geological Society of America and University of Kansas Press.  
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[T64] Teichert, C. 1964. Morphology of hard parts. In ''Treatise on Invertebrate Paleontology'' pt. K. ''Mollusca 3. Cephalopoda – General Features – Endoceratoidea – Actinoceratoidea – Nautiloidea – Bactritoidea'' (R. C. Moore, ed.) pp. K13-K53. The Geological Society of America and the University of Kansas Press.
 
'''Credits'''
'''Credits'''
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[[User:Christopher|Christopher]] 00:23, 16 January 2011 (UTC)
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[[User:Christopher|Christopher]] 16 January 2011 <br/>
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[[User: John M|John M]]  30 Sept 2014

Latest revision as of 14:37, 30 September 2014

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