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Polyptychoceras (Polyptychoceras) obstrictum

Cephalopoda - Ammonitida - Diplomoceratidae

Taxonomy
Hamites obstrictus was named by Jimbo (1894).

It was recombined as Diplomoceras obstrictum by Anderson (1958); it was recombined as Polyptychoceras obstrictum by Matsumoto (1959); it was recombined as Polyptychoceras (Polyptychoceras) obstrictum by Wright et al. (1996).

Sister species lacking formal opinion data
P. haradanum, P. mihoense, P. subquadratum

Synonymy list
YearName and author
1894Hamites obstrictus Jimbo p. 38 figs. Pl. VIII [XXIV], Fig. 1, 1a, 1b
1958Diplomoceras obstrictum Anderson p. 199
1959Polyptychoceras obstrictum Matsumoto p. 165
1996Polyptychoceras (Polyptychoceras) obstrictum Wright et al. p. 253 figs. Fig. 197, 3e

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
subclassAmmonoidea()
RankNameAuthor
orderAmmonitida
suborderAncyloceratinaWiedmann 1966
superfamilyTurrilitoidea(Gill 1871)
familyDiplomoceratidaeSpath 1926
subfamilyPolyptychoceratinaeMatsumoto 1938
genusPolyptychocerasYabe 1927
subgenusPolyptychocerasYabe 1927
speciesobstrictum(Jimbo 1894)

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.

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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragoniteo
Environment: marinec
Locomotion: fast-movingo
Life habit: nektonico
Diet: carnivoreo
Vision: well-developedc
Created: 2005-01-28 02:27:03
Modified: 2009-10-08 14:14:55
Source: o = order, c = class
References: Kiessling 2004, Kiessling 2003

Age range: base of the Early/Lower Santonian to the top of the Maastrichtian or 85.80000 to 66.00000 Ma

Collections (6 total)


Time interval Ma Country or state Original ID and collection number
Santonian86.3 - 83.6USA (California) Polyptychoceras obstrictum (86954)
Santonian86.3 - 83.6Antarctica Polyptychoceras obstrictum (83371 83372 83373)
Early/Lower Santonian85.8 - 83.5Japan (Hokkaido) Polyptychoceras obstrictum (94682)
Maastrichtian72.1 - 66.0Russian Federation (Sakhalin) Diplomoceras obstrictum (64608)