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Orthoceras expansum

Cephalopoda - Orthocerida - Orthoceratoidea

Taxonomy
Orthoceras expansum was named by Blake (1882). It is not extant. Its type specimen is GSM 103511, a shell. Its type locality is Killey Bridge Fm. locality 1, NE of Pomeroy, which is in a Richmondian offshore mudstone/siltstone in the Killey Bridge Formation of the United Kingdom.

It was recombined as Michelinoceras expansum by Evans (1993).

Sister species lacking formal opinion data
Michelinoceras bullatum, Michelinoceras ibex, Michelinoceras imbricatum, O. abruptum, O. agassizi, O. alcyon, O. alienum, O. allumettense, O. alticola, O. amoenum, O. anguliferas, O. annulatum, O. antenor, O. arcitenens, O. arcuoliratum, O. argus, O. aristides, O. bassleri, O. beltrami, O. bifoveatum, O. bokkeveldense, O. bokkeveldensis, O. bonum, O. carnosum, O. cavum, O. centrale, O. chemungense, O. clavatum, O. consolans, O. constrictum, O. costellatum, O. decipiens, O. deletum, O. dimidiatum, O. discrepans, O. dulce, O. equisetum, O. expectans, O. explorator, O. fractum, O. fusiforme, O. gamkaense, O. gaspense, O. gregarium, O. importunum, O. indianense, O. kindlei, O. laevigatum, O. lamellosum, O. lativentrum, O. limulurus, O. luxum, O. mackenzicum, O. martinianum, O. minimum, O. minnesotense, O. morresi, O. multicameratum, O. multilobiatum, O. percense, O. pictum, O. planicanaliculatum, O. potens, O. proprinquum, O. rectiannulatum, O. regulara, O. regulare, O. renovatum, O. rex, O. richteri, O. sacrum, O. salutatum, O. sayi, O. scabridum, O. sollasi, O. speciosum, O. tenuilineatum, O. tenuistriatum, O. teres, O. tiro, O. trecentesium, O. trusitum, O. virgulatum, O. winnipegense, O. woodwardi, O. wrighti, O. tyrrelli, Spyroceras anellus

Synonymy list
YearName and author
1882Orthoceras expansum Blake
1993Michelinoceras expansum Evans p. 166 fig. 7

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classCephalopodaCuvier 1797
familyOrthoceratoidea()
orderOrthoceridaKuhn 1940
familyOrthoceratidae
genusOrthocerasBreynius 1832
speciesexpansumBlake 1882

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Orthoceras expansum Blake 1882
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragoniteo
Environment: marineo
Locomotion: actively mobileo
Life habit: nektonico
Diet: carnivoreo
Vision: well-developedc
Created: 2005-10-06 14:35:22
Modified: 2009-04-13 11:56:59
Source: o = order, c = class
References: Aberhan et al. 2004, Kiessling 2004

Age range: Richmondian or 449.60000 to 445.50000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Richmondian449.6 - 445.5United Kingdom (Northern Ireland) Orthoceras expansum (type locality: 89260)