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Pachyrisma rimosum

Bivalvia - Megalodontida - Megalodontidae

Taxonomy
Isocardia rimosa was named by Münster (1841). It is a 3D body fossil. Its type locality is St. Cassian (Munster coll), which is in a Julian carbonate limestone in the Cassian Formation of Italy.

It was recombined as Pachyrisma rimosum by Laube (1865); it was recombined as Megalodus rimosus by Hoernes (1880); it was recombined as Megalodon rimosus by Bittner (1895); it was recombined as Megalodon rimosum by Arthaber (1915).

Sister species lacking formal opinion data

Synonymy list
YearName and author
1841Isocardia rimosa Münster p. 87 figs. Pl 8, fig 22
1865Pachyrisma rimosum Laube p. 39 figs. Pl 15, fig 9
1880Megalodus rimosus Hoernes
1895Megalodon rimosus Bittner
1915Megalodon rimosum Arthaber

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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
genusPachyrismaMorris and Lycett 1850
speciesrimosum()

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.

Pachyrisma rimosum Münster 1841
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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 Pelsonian to the top of the Julian or 244.24000 to 233.60000 Ma

Collections (11 total)


Time interval Ma Country or state Original ID and collection number
Anisian246.7 - 241.464Austria (Innsbruck) Megalodon rimosus (202274)
Anisian246.7 - 241.464Hungary (Bakony) Megalodus rimosus (203264)
Middle Triassic246.7 - 237.0Austria (Innsbruck) Megalodon rimosus (202279)
Bithynian - Pelsonian244.99 - 243.33Bulgaria Megalodon rimosus (44917)
Pelsonian - Tuvalian244.24 - 227.3Türkiye (Anatolia) Megalodon rimosum (204511 204518)
Julian237.0 - 233.6Italy Isocardia rimosa (type locality: 137429) Megalodon rimosus (34692 69661 69684 144634)