Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Neomegalodon triqueter

Bivalvia - Megalodontida - Megalodontidae

Taxonomy
Cardium triquetrum was named by Wulfen (1793). It is a 3D body fossil. Its type locality is St. Oswald adit, Bad Bleiberg, which is in a Julian lagoonal/restricted shallow subtidal packstone in the Wetterstein Formation of Austria. It is the type species of Neomegalodon.

It was recombined as Megalodus triqueter by von Wöhrmann (1889), Frech (1912), Zapfe (1972); it was recombined as Megalodon (Neomegalodon) triqueter by Cox et al. (1969); it was recombined as Neomegalodon triqueter by Yao et al. (2007).

Synonymy list
YearName and author
1793Cardium triquetrum Wulfen p. 48 figs. Pl 2, figs 1-3
1889Megalodus triqueter von Wöhrmann
1912Megalodus triqueter Frech
1969Megalodon (Neomegalodon) triqueter Cox et al. p. N743
1972Megalodus triqueter Zapfe p. 596 figs. Pl 1, fig 4
2007Neomegalodon triqueter Yao et al. p. 1334

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
—Eubivalvia
subclassAutobranchia(Groblen 1894)
infraclassHeteroconchia(Gray 1854)
RankNameAuthor
—CardiomorphiFerussac 1822
—CardioniFerussac 1822
—CardiidiaFerussac 1822
—CardiataFerussac 1822
superorderCardiiformiiFerussac 1822
orderMegalodontidaStarobogatov 1992
superfamilyMegalodontoidea(Morris 1853)
familyMegalodontidaeMorris 1853
genusNeomegalodonGuembel 1864
speciestriqueter()

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.

†Neomegalodon triqueter Wulfen 1793
show all | hide all
Diagnosis
No diagnoses are available
Measurements
partNmeanminimummaximummedians.d.
shell height226.526.027.026.50.707

Composition: aragonitef
Locomotion: stationaryf
Life habit: semi-infaunalf
Diet: suspension feederf
Vision: blindf
Created: 2025-05-16 23:42:40
Modified: 2025-05-16 23:44:10
Source: f = family
Reference: Foote et al. 2024

Age range: base of the Julian to the top of the Rhaetian or 237.00000 to 201.40000 Ma

Collections (15 total)


Time interval Ma Country or state Original ID and collection number
Julian237.0 - 233.6Austria Cardium triquetrum (138155) Neomegalodon triqueter (69264)
Julian237.0 - 233.6Italy Neomegalodon triqueter (61748)
Carnian237.0 - 227.3Austria (Steiermark) Megalodus triqueter (85239)
Carnian237.0 - 227.3Hungary Neomegalodon triqueter (70858 70883)
Julian - Tuvalian237.0 - 227.3Italy Neomegalodon triqueter (61749)
Tuvalian233.6 - 227.3Austria (Tyrol) Megalodus triqueter (203207)
Norian227.3 - 205.7Italy Neomegalodon triqueter (66412)
Norian227.3 - 205.7Hungary Neomegalodon triqueter (70989 73188 73266)
Norian227.3 - 205.7Italy (Belluno) Megalodus triqueter (203327)
Norian227.3 - 205.7Italy (Trento) Megalodon triqueter (231838)
Rhaetian205.7 - 201.4Italy (Trento) Megalodon triqueter (232113)