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Dichotomites (Prodichotomites) amundensis

Cephalopoda - Ammonitida - Polyptychitidae

Taxonomy
Ringnesiceras (Ringnesiceras) amundense was named by Kemper and Jeletzky (1979) [DISTRIBUTION: Valanginian; Greenland; Arctic Canada.]. It is not a trace fossil. Its type locality is GSC Loc. 93755 - Amund Ringnes Island [Deer Bay Fm], which is in a Valanginian marine siliciclastic in the Deer Bay Formation of Canada.

It was synonymized subjectively with Polyptychites (Polyptychites) polyptychus by Bogomolov (1989); it was recombined as Dichotomites (Prodichotomites) amundensis by Alsen (2006).

Sister species lacking formal opinion data
D. giganteus, D. tardescissus, D. triptychoides, D. bidichotomites

Synonymy list
YearName and author
1979Ringnesiceras (Ringnesiceras) amundense Kemper and Jeletzky figs. pl. 1, figs. 2a-b
1988Ringnesiceras (Ringnesiceras) amundense Jeletzky and Kemper p. 200 figs. Pl 57, fig. 3; Pl 58, figs. 2A-2C; Pl 58, figs. 3A-3B; text-fig 61a
2006Dichotomites (Prodichotomites) amundensis Alsen p. 115

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
subclassAmmonoidea()
RankNameAuthor
orderAmmonitida
suborderAmmonitinaHyatt 1889
superfamilyPerisphinctaceaeSteinman 1890
familyPolyptychitidaeWedekind 1918
subfamilyPolyptychitinaeWedekind 1918
genusDichotomitesKoenen 1909
subgenusProdichotomites(Kemper 1971)
speciesamundensis()

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.

†Dichotomites (Prodichotomites) amundensis Kemper and Jeletzky 1979
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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 2003, Kiessling 2004

Age range: Late/Upper Valanginian or 140.20000 to 136.40000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Valanginian140.2 - 136.4Canada (Northwest Territories) Ringnesiceras amundense (type locality: 87554)
Late/Upper Valanginian140.2 - 136.4Canada (Northwest Territories) Ringnesiceras amundense (87552)