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Platyostoma
Taxonomy
Platyostoma was named by Conrad (1842).
It was reranked as Platyceras (Platyostoma) by Knight et al. (1960).
It was assigned to Gastropoda by Waagen (1880); to Platyostomatidae by Miller (1889); to Platyceras by Knight et al. (1960); and to Platyceratidae by Wagner (2023).
It was reranked as Platyceras (Platyostoma) by Knight et al. (1960).
It was assigned to Gastropoda by Waagen (1880); to Platyostomatidae by Miller (1889); to Platyceras by Knight et al. (1960); and to Platyceratidae by Wagner (2023).
Species
P. (Platyostoma), P. adstrictum, P. allardycei, P. antiquuis, P. boggsi, P. brownsportense, P. cliftonensis, P. cornutum, P. daytonense (syn. Diaphorostoma niagarense), P. deforme, P. delicata, P. desmatum, P. euomphaloides, P. gebhardi, P. grayvillensis, P. hemispherica, P. humile, P. humilis, P. incisum, P. indica, P. insolita, P. invictus, P. irrasum, P. lineata, P. lutheri, P. minutissima, P. modesta, P. muitissima, P. naticoides, P. niagarensis, P. pastillus, P. perceense, P. perforatum, P. plebeium, P. pleurotoma, P. rotundatum, P. rowei, P. speciosum, P. strophius, P. subglobosa, P. triangularis, P. tumidum, P. turbinata, P. unisulcata, P. ventricosum
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1842 | Platyostoma Conrad p. 275 |
| 1868 | Exogyroceras Meek and Worthen |
| 1880 | Platystoma Waagen p. 103 |
| 1885 | Diaphorostoma Fischer |
| 1889 | Platycerina Miller |
| 1889 | Platyostoma Miller p. 395 |
| 1956 | Ostlerina Talent and Philip p. 59 |
| 1960 | Platyceras (Platyostoma) Knight et al. |
| 2023 | Platyostoma Wagner p. G0164 |
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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.
G. †Platyostoma Conrad 1842
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†Platyceras (Platyceras) cornutum loricatum Lindström 1884
Subg. †Platyostoma (Platyostoma) Conrad 1842
†Platyostoma adstrictum Lindström 1884
†Platyostoma allardycei Clarke 1913
†Platyostoma antiquuis Webster 1905
†Platyostoma boggsi Rohr et al. 1981
†Platyostoma brownsportense Foerste 1903
†Platyostoma cliftonensis Foerste 1909
†Platyostoma cornutum Hisinger 1837
†Platyostoma daytonense Foerste 1923
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Invalid names: Diaphorostoma niagarense Foerste 1887 [replaced]
†Platyostoma deforme Sedgwick and Murchison 1840
†Platyostoma delicata Talent and Philip 1956
†Platyostoma desmatum Clarke 1904
†Platyostoma euomphaloides Hall 1879
†Platyostoma gebhardi Conrad 1840
†Platyostoma grayvillensis Worthen 1882
†Platyostoma hemispherica Hall 1843
†Platyostoma humile Billings 1866
†Platyostoma humilis Clarke and Swartz 1913
†Platyostoma incisum Chapman 1916
†Platyostoma indica Waagen 1880
†Platyostoma insolita Webster 1906
†Platyostoma invictus Whidborne 1891
†Platyostoma irrasum Fenton and Fenton 1924
†Platyostoma lineata Conrad 1842
†Platyostoma lutheri Clarke 1904
†Platyostoma minutissima Clarke 1885
†Platyostoma modesta Webster 1906
†Platyostoma muitissima Clarke 1903
†Platyostoma naticoides Etheridge, Jr. 1878
†Platyostoma niagarensis Hall 1852
†Platyostoma pastillus Clarke 1909
†Platyostoma perceense Clarke 1908
†Platyostoma perforatum Whiteaves 1904
†Platyostoma plebeium Hall 1876
†Platyostoma pleurotoma Hall 1879
†Platyostoma rotundatum Clarke 1904
†Platyostoma rowei Clarke and Swartz 1913
†Platyostoma speciosum Sedgwick and Murchison 1840
†Platyostoma strophius Hall 1862
†Platyostoma subglobosa Stauffer 1909
†Platyostoma triangularis Talent and Philip 1956
†Platyostoma tumidum Whiteaves 1892
†Platyostoma turbinata Hall 1861
†Platyostoma unisulcata Conrad 1842
†Platyostoma ventricosum Conrad 1842
Invalid names: Diaphorostoma Fischer 1885 [synonym], Exogyroceras Meek and Worthen 1868 [synonym], Ostlerina Talent and Philip 1956 [synonym], Platycerina Miller 1889 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 31.1 | 26.0 | 40.0 | 29.0 | 7.37 | |
| shell diameter | 3 | 56.0 | - | - | 56.0 | - |
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| Source: f = family, superf = superfamily, c = class | |||||
| References: Batten 1984, Knight et al. 1960, Kiessling 2004 | |||||
Age range: base of the Rhuddanian to the top of the Capitanian or 443.40000 to 259.51000 Ma
Collections (231 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Silurian | USA (California) | Diaphorostoma sp. (229258) Diaphorostoma sp., P. sp. (229253) P. sp. (229254) | |
| Silurian | USA (Indiana) | P. niagarense, P. brownsportense (75266) | |
| Rhuddanian | Russian Federation (Siberia) | Platyceras cornutum (3342 3343) | |
| Rhuddanian | Canada (Nova Scotia) | Platyceras cornutum (49822) | |
| Rhuddanian | Canada (Ontario) | Naticonema niagarense (173185) P. hemispherica (173224) | |
| Juuru | Estonia | Platyceras sp. (172929) | |
| Alexandrian | Canada (Québec) | Diaphorostoma humile, Diaphorostoma niagarense (63786) | |
| Alexandrian | Canada (Quebec) | Diaphorostoma humile (63558) | |
| Llandovery | Canada (Ontario) | Naticonema niagarensis (75225) Naticonema sp. (446) Platystoma sp. (444) | |
| Llandovery | Greenland (Washington Land) | Platyceras cornutum (49828) | |
| Llandovery | USA (New York) | Diaphorostoma sp. (459) Naticonema niagarensis (75224) | |
| Llandovery | USA (Indiana) | P. daytonense, P. clintonensis (13291) | |
| Llandovery - Ludlow | USA (Maryland) | Diaphorostoma niagarense (41101) | |
| Raikkula | Estonia | P. sp. (172928) | |
| Aeronian | Norway (Oslo) | P. cornutum (49984) | |
| Telychian | Norway (Oslo) | P. cornutum (49985) | |
| Telychian | USA (New York) | Diaphorostoma hemisphericum (83098) Strophostylus ventricosus (82506 82518) | |
| Telychian | Canada (Ontario) | Diaphorostoma perforatum (77332) | |
| Niagaran | USA (Ohio) | Diaphorostoma sp. (475) | |
| Jaani | Estonia (Saare) | Platyceras cornutum (195595) | |
| Sheinwoodian | Sweden (Gotland) | Platyceras cornutum (13592 13594 13597 13598 13669 13670 13672) | |
| Sheinwoodian | USA (Indiana) | P. sp. 1, P. sp. 2, P. sp. 3 (26805) | |
| Sheinwoodian | Sweden | Platyceras cornutum (233125) Platyceras cornutum, Platyceras sp. a (233124) | |
| Sheinwoodian | Canada (Nunavut) | Platyceras boggsi (690 26009) Platyceras sp. A, Platyceras boggsi (26003) | |
| Sheinwoodian | USA (New York) | Diaphorostoma hemisphericum (82545) Naticonema niagarensis (26863 26864) | |
| Wenlock | USA (Indiana) | Naticonema niagarense (26787 26792 26794) Naticonema niagarense, P. plebium (26789) Naticonema niagarensis (26778) | |
| Wenlock | Greenland | P. sp. (188490) | |
| Wenlock | USA (Tennessee) | Naticonema niagarense (26788) Naticonema niagarense, P. plebium (26802) | |
| Wenlock | USA (New York) | Diaphorostoma hemisphericum (81920) Diaphorostoma niagarense (81783 81804 81917) Diaphorostoma niagarense, Diaphorostoma hemisphericum (81813) Diaphorostoma sp. (541) Naticonema niagarensis (12934 12936 13047 13050 13051 13052 13053 13054 26854) | |
| Wenlock | USA (Iowa) | P. sp. (25019 25032) | |
| Wenlock - Ludlow | USA (Wisconsin) | P. niagarensis (24944) | |
| Wenlock - Pridoli | Italy (Sardinia) | P. sp. (26163) | |
| Wenlock - Pridoli | Argentina | P. sp. (25058) | |
| Homerian | USA (New York) | Diaphorostoma niagarensis (155562) | |
| Homerian | Norway | Platyceras cornutum (14317) | |
| Homerian | Sweden (Gotland) | Platyceras cornutum (13599 13673) Platyceras cornutum, Platyceras spiratum (13671) | |
| Homerian - Gorstian | Sweden (Gotland) | Platyceras cornutum, Platyceras spiratum (13601) | |
| Gorstian | Sweden (Gotland) | Cyclonema adstrictum, Platyceras cornutum, Platyceras spiratum (13603) | |
| Gorstian | Canada (Nunavut) | Platyceras boggsi, Platyceras cornutum (26008) | |
| Ludlow | USA (Missouri) | P. sp. (26822) | |
| Ludfordian | Sweden (Gotland) | P. cornutum (111191) | |
| Ludfordian | Sweden | P. cornutum (79812) | |
| Ludfordian | USA (Indiana) | Platyceras cornutum (6706) | |
| Ludfordian - Pridoli | USA (Oklahoma) | P. sp. (26824) | |
| Pridoli | Canada (Nova Scotia) | Platyceras cornutum (155398) | |
| Pridoli | USA (New York) | Diaphorostoma sp. (491) | |
| Pridoli | Canada (Quebec) | Diaphorostoma niagarense (207843) | |
| Pridoli - Helderbergian | Argentina | P. sp. (25055) | |
| Lochkovian | USA (Maine) | P. ventricosum (103303) | |
| Devonian | USA (Alaska) | Diaphorostoma sp. (112232) | |
| Gedinnine | Kazakhstan (Karagandinskaya Oblast) | Platyceras sp. (69183 69194) | |
| Siegen | Australia (Victoria) | Ostlerina delicata (56698) Ostlerina delicata, P. triangularis (56699) | |
| Pragian | Canada (Quebec) | Platyceras perceense (599) | |
| Pragian | USA (New York) | Diaphorostoma desmatum, Diaphorostoma ventricosum, Platyceras gebhardi (160377) | |
| Pragian | Austria | P. varians, P. naticoides (154582) | |
| Pragian | USA (Pennsylvania) | Diaphorostoma desmatum (231623) | |
| Early/Lower Emsian | Morocco | Platyceras sp. (150360) | |
| Emsian | France | Platyceras naticoides (154581) | |
| Emsian | Canada (Quebec) | Diaphorostoma sp. (608) | |
| Emsian | USA (West Virginia) | Platyceras gebharti (70109) | |
| Emsian | South Africa | Diaphorostoma baini (35581 35584 35590) Diaphorostoma baini, Diaphorostoma sp. (a), Diaphorostoma sp. (b) (35578) | |
| Emsian | Brazil (Parana) | Platyceras sp. (37082) | |
| Emsian - Eifelian | Brazil (Mato Grosso) | Platyceras sp. (37115) | |
| Emsian - Eifelian | Venezuela | P. sp. (35895 35896) | |
| Emsian - Eifelian | Brazil (Para) | Platyceras sp. (37138) | |
| Emsian - Eifelian | Brazil (Piaui) | Platyceras sp. (37128) | |
| Emsian - Eifelian | Colombia | P. lineata (36017 36018) | |
| Late/Upper Emsian | Austria | P. cornutum (26220) | |
| Eifelian | Brazil (Para) | Platyceras sp. (37137) | |
| Eifelian | USA (New York) | Platyceras sp. (77056) P. lineata (9538 9542 9551 9552 9613) P. sp. (9537) P. turbinata (9548 9553 9617) P. turbinata, P. lineata (9541 9614 9615) Platystoma unisulcata, Platystoma lineata, Platystoma turbinata (9540) | |
| Eifelian | USA (Pennsylvania) | Diaphorostoma lineatum (232686) | |
| Eifelian | South Africa | Diaphorostoma sp. (35594) | |
| Eifelian | USA (Ohio) | P. lineatum, P. subglobosa (129948) | |
| Eifelian - Givetian | Brazil (Piaui) | Platyceras sp. (37170) | |
| Middle Devonian | USA (New York) | Naticonema lineatum (91091 91238 91240 91277 91278 91279 91280 91281) Platyceras sp. (75143) | |
| Middle Devonian | USA (Indiana) | Naticonema lineatum (11101) | |
| Cazenovian | USA (New York) | Platyceras sp. A, Platyceras sp. B (69461) | |
| Givetian | Canada (Manitoba) | P. tumidum (56461) | |
| Givetian | Brazil (Para) | Platyceras sp. (37173) | |
| Givetian | United Kingdom (England) | Capulus invictus (81021) Capulus invictus, P. deforme, P. speciosum (129878 130270) | |
| Givetian | USA (Illinois) | Platystoma lineata (157345) | |
| Givetian | USA (New York) | Diaphorostoma lineata (10459) Diaphorostoma lineatum (76163) Naticonema lineata (5619 5620 5661 5664 5667 5668 8717 8718 8722 8724 8726 8727 8728 8978 8979 8984 8987 8993 8996 9000 9002 9005 9006 9016 9017 9019 9020 9028) Naticonema lineatum (10101 10107 10110 10119 96209 96210 96211 96212 96213) Platystoma lineata (89688 89698 89741 89804) | |
| Givetian | USA (Ohio) | Platyceras lineatum (38450 38451 38457 38458 38459 38460 38461 38462) P. lineatum (38452 38453 38454 38455 38456) | |
| Givetian | USA (Indiana) | P. sp. (170009) | |
| Givetian | USA (Pennsylvania) | Platyceras euomphaloides (9659) Playceras sp. (9991) | |
| Frasnian | USA (Pennsylvania) | Diaphorostoma lineatum (148222) | |
| Frasnian | USA (Iowa) | Diaphorostoma antiquum (3403 3405) Diaphorostoma antiquum, Diaphorostoma insolitum (56255) Diaphorostoma irrasum (56253) Diaphorostoma sp. (3407) | |
| Frasnian | Colombia (Boyaca) | P. lineata (36012) | |
| Middle Frasnian | USA (New York) | P. minutissima (136399) | |
| Early/Lower Famennian | Germany (Rhenish Massif) | P. lineata (5960) | |
| Asselian - Sakmarian | Svalbard and Jan Mayen | P. indica (145696) | |
| Wordian | Pakistan | Diaphorostoma indicum (125843) | |
| Wordian | China (Nei Mongol) | Strophostylus indicus (109091 109209 109211 109257) | |
| Capitanian | Pakistan | Diaphorostoma indicum (125882 127032) | |
| Wuchiapingian | Pakistan | Diaphorostoma indicum (126302) Platystoma indicum (95279) |