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Gastropoda - Euomphalina

Synonymy list
YearName and author
1859Platyceratacea Hall
1960Platyceratacea Knight et al. p. 238
1975Platyceratoidea Golikov and Starobogatov p. 208
1999Platyceratoidea Bandel and Frýda p. 223
2001Nerrhenoidea Bandel and Heidelberger
2003Platyceratacea Jeffery
2005Nerrhenoidea Bouchet et al. p. 246
2005Platyceratoidea Bouchet et al. p. 246
2017Platyceratoidea Wagner

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EubilateriaAx 1987
classGastropodaCuvier 1797

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.

No diagnoses are available
No measurements are available
Composition: "calcite"superf
Composition 2: aragonitesuperf
Adult length: 10 to < 100superf
Adult width: 10 to < 100superf
Adult height: 10 to < 100superf
Ribbing: minorsuperf
Ontogeny: accretionsuperf
Locomotion: facultatively mobilesuperf
Life habit: epifaunalsuperf
Diet: parasitesuperf
Diet 2: carnivoresuperf
Vision: limitedc
Created: 2010-01-28 07:28:33
Modified: 2019-04-15 13:56:39
Source: superf = superfamily, c = class
References: Kiessling 2004, Batten 1984

Age range: base of the Costonian to the top of the Chattian or 460.90000 to 23.03000 Ma

Collections (1235 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Middle Ordovician470.0 - 458.4USA (New York) Cyclonema sp. (333 430)
Chazy466.0 - 457.5USA (New York) Eunema leptonotum (56214 171713)
Llandeilo - Caradoc466.0 - 449.5China (GanSu) Cyclonema sp. (20763)
Costonian460.9 - 457.5USA (Oklahoma) Cyclonema sp. (13815 13816)
Dobrotivian460.9 - 457.5Spain (Guadalajara) Holopea antiquata (194904)
Keila - Oandu460.9 - 452.0Sweden (Dalarna) Cyclonema inaequistriatum (155566)
Ashbyan460.9 - 449.5USA (Tennessee) Cyclonema praecipitum (5327)
Berounian460.9 - 449.5Morocco Holopea antiquata (20966 192913) Nonorios pater (56179)
Berounian460.9 - 449.5Czech Republic Naticopsis antiquata (155175)
Blackriveran460.9 - 449.5USA (Illinois, Iowa) Horiostomella aiens (23612) Trochonema percarinatum (23613 23614 23615)

Youngest occurrences

Time interval Ma Country or state PBDB collection number
Aegean247.2 - 242.0Hungary (Mecsek) Natiria spp. (197110)
Anisian247.2 - 242.0Hungary Natiria subtilistriata (203346)
Anisian247.2 - 242.0China (Guizhou) Natiria costata (98055)
Illyrian247.2 - 242.0Hungary Natiria costata (199876)
Carnian237.0 - 228.0USA (Alaska) Platyceras sp. (112343)
Carnian237.0 - 228.0China (Yunnan) Natiria costata (165315)
Late/Upper Triassic237.0 - 201.3USA (Alaska) Platyceras sp. (112288)
Julian235.0 - 232.0Italy Natiria acutecostata (69679) Natiria sublineata (69659)
Late/Upper Bathonian - Early/Lower Callovian167.7 - 161.2Madagascar (Toliara) Cyclonema zetes (98168)
Rupelian - Chattian33.9 - 23.03Italy Gibbula neglecta (180394)