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Gastropoda - Euomphalina - Platyceratidae

Platyceras was named by Conrad (1840) [Sepkoski's age data: O Cara-l Tr Anis Sepkoski's reference number: 797]. It is not extant. It is the type genus of Platyceratidae.

It was assigned to Capulidae by Ulrich and Scofield (1897); to Archaeogastropoda by Sepkoski (2002); and to Platyceratidae by Hall (1859), Knight et al. (1960) and Bouchet et al. (2005).

P. (Euthyrachis), P. (Platyceras), P. (Platyostoma) (syn. Diaphorostoma, Ostlerina, Exogyroceras, Platycerina), P. (Tubomphalus), P. (Visitator) (syn. Aulopea, Saffordella, Distemnostoma, Cowwarrella), P. abundans (syn. Capulus deformis), P. ammon, P. angulatum, P. angustum, P. argo, P. attenuatum, P. auriculatum, P. billingsi, P. bistrami, P. bucculentum, P. callossum, P. canalicatum, P. carinatum, P. chapmani, P. colonus, P. columbinus, P. compressum, P. compressum, P. compressus, P. contortum, P. contortus, P. cordatus, P. crassum, P. cymbium, P. decorum, P. dilatans, P. dilatatum, P. disciforme, P. dormitans, P. duriculatum, P. eberti, P. echinatum, P. edmundi, P. elongatum, P. encloides, P. erectum, P. evolutus, P. expansus, P. fecundum, P. galeritus, P. gaspense, P. gibbosum, P. glenparkensis, P. gracilis, P. guesnini, P. hainensis, P. haliotis, P. haliotoides, P. hebes, P. holzapfeli, P. humulus, P. kahlebergensis, P. laevicostatum, P. latum, P. leboutillieri, P. lejeunii, P. magnificum, P. mansfieldense, P. marylandicum, P. minutum, P. multiplicatus, P. munsteriana, P. nasutum, P. nettersheimensis, P. niagarensis, P. nodosum, P. oehlerti, P. oxynotum, P. paralium, P. patelliforme, P. pericompsus, P. perneri, P. platystomum, P. plicatile, P. priscum, P. producti, P. pulcherrimum, P. rarispinum, P. reflexum, P. richtum, P. rictum, P. robustum, P. sigmoidale, P. sinuatum, P. spirale, P. squamosus, P. steinmanni, P. subrotundum, P. subumbonatum, P. symmetricum, P. terminalis, P. thetis, P. trilobatum, P. trojani, P. uncinatus, P. undata, P. unicus, P. ussheri, P. verrucosum, P. vetusta, P. villmarensis, P. yochelsoni, P. zinkeni
Species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1840Platyceras Conrad
1841Acroculia Phillips
1844Actita Fahrenkohl
1859Platyceras Hall
1897Platyceras Ulrich and Scofield
1960Platyceras Knight et al. p. 240
2002Platyceras Sepkoski, Jr.
2005Platyceras Bouchet et al. pp. 134, 246

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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
shell height615.24.5040.023.014.1
shell diameter656.0--56.0-

Composition: low Mg calcitef
Composition 2: aragonitef
Entire body: yesg
Adult length: 10 to < 100g
Adult width: 10 to < 100g
Adult height: 10 to < 100g
Folds: noneg
Ribbing: noneg
Spines: noneg
Internal reinforcement: noneg
Ontogeny: accretionsuperf
Environment: marinef
Locomotion: facultatively mobileg
Epibiont: yesg
Life habit: epifaunalg
Diet: parasiteg
Vision: limitedc
Comments: BODY SIZE: Data from Knight et al. (1960).g
Created: 2004-02-29 18:30:08
Modified: 2009-06-06 09:13:53
Source: g = genus, f = family, superf = superfamily, c = class
References: Kiessling 2004, Knight et al. 1960, Aberhan et al. 2004, Batten 1984

Age range: base of the Rhuddanian to the top of the Carnian or 443.40000 to 228.00000 Ma

Collections (562 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Rhuddanian443.4 - 440.8Canada (Ontario) Naticonema niagarense (173185) Platyostoma hemispherica (173224)
Rhuddanian443.4 - 440.8Russian Federation (Siberia) P. cornutum (3342 3343)
Rhuddanian443.4 - 440.8USA (Illinois) P. sp. (26692)
Rhuddanian443.4 - 440.8Canada (Nova Scotia) P. cornutum (49822)
Juuru443.4 - 439.0Estonia P. sp. (172930) P. sp., P. sp. (172929)
Rhuddanian - Aeronian443.4 - 438.5USA (Iowa) P. sp. (26691)
Alexandrian443.4 - 436.0Canada (Quebec) Diaphorostoma humile (63558)
Alexandrian443.4 - 436.0Canada (Qu├ębec) Diaphorostoma humile, Diaphorostoma niagarense (63786) P. sp. (24441 24442)
Raikkula443.4 - 436.0Estonia Platyostoma sp. (172928)
Llandovery443.4 - 433.4Greenland (Washington Land) P. cornutum (49828)

Youngest occurrences

Time interval Ma Country or state PBDB collection number
Wordian268.8 - 265.1USA (Texas) P. sp. (43550)
Wordian268.8 - 265.1Pakistan Diaphorostoma indicum (125843)
Wordian268.8 - 265.1China (Nei Mongol) Strophostylus indicus (109091 109209 109211 109257)
Capitanian265.1 - 259.9Pakistan Diaphorostoma indicum (125882 127032)
Wuchiapingian259.9 - 254.17Pakistan Diaphorostoma indicum (126302) Platystoma indicum (95279)
Wuchiapingian259.9 - 254.17USA (Wyoming) P. yochelsoni (61948 61951 82181)
Lopingian259.9 - 252.17China (Jiangxi) P. producti (109628)
Wuchiapingian - Changhsingian259.9 - 252.17Pakistan Orthonychia abundans (126707)
Carnian237.0 - 228.0USA (Alaska) P. sp. (112343)
Late/Upper Triassic237.0 - 201.3USA (Alaska) P. sp. (112288)