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Isorthoceras
Taxonomy
Isorthoceras was named by Flower (1962) [Sepkoski's age data: O Cara O Ashg-m Sepkoski's reference number: 298]. Its type is Orthoceras sociale.
It was assigned to Pseudorthoceratidae by Frey (1995); to Orthocerida by Sepkoski (2002); and to Proteoceratidae by Teichert et al. (1964), Crick (1981), Niko (2007), Kröger (2013), Kröger and Aubrechtova (2017), Kröger and Aubrechtová (2019).
It was assigned to Pseudorthoceratidae by Frey (1995); to Orthocerida by Sepkoski (2002); and to Proteoceratidae by Teichert et al. (1964), Crick (1981), Niko (2007), Kröger (2013), Kröger and Aubrechtova (2017), Kröger and Aubrechtová (2019).
Species
I. albersi, I. angelini, I. cavi, I. curvilineatum, I. dalecarlense, I. elongatocinctum, I. heintzi, I. heroyense, I. hudsonicum, I. junceum, I. maris, I. nikwis, I. padisense, I. rogersensis (syn. Treptoceras praenuntium), I. sociale, I. strigatum, I. suave, I. subcostatum, I. sylphide, I. urdr, I. vexilli, I. wahlenbergi
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Isorthoceras Flower pp. 32-33 |
| 1964 | Isorthoceras Teichert et al. p. 256 |
| 1981 | Isorthoceras Crick p. 228 |
| 1995 | Isorthoceras Frey p. P36 |
| 2002 | Isorthoceras Sepkoski |
| 2007 | Isorthoceras Niko |
| 2013 | Isorthoceras Kröger |
| 2017 | Isorthoceras Kröger and Aubrechtova |
| 2019 | Isorthoceras Kröger and Aubrechtová |
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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. †Isorthoceras Flower 1962
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†Isorthoceras albersi Miller and Faber 1894
†Isorthoceras angelini Kröger 2013
†Isorthoceras cavi Kröger and Aubrechtova 2017
†Isorthoceras curvilineatum Kröger 2013
†Isorthoceras dalecarlense Kröger et al. 2011
†Isorthoceras elongatocinctum Portlock 1843
†Isorthoceras heintzi Strand 1934
†Isorthoceras heroyense Strand 1934
†Isorthoceras hudsonicum Ruedemann 1912
†Isorthoceras junceum Hall 1877
†Isorthoceras maris Kröger and Aubrechtova 2017
†Isorthoceras nikwis Kröger and Aubrechtová 2019
†Isorthoceras padisense Kröger and Aubrechtova 2017
†Isorthoceras rogersensis Foerste 1914
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Invalid names: Treptoceras praenuntium Flower 1942 [synonym]
†Isorthoceras sociale Hall in Miller 1877
†Isorthoceras strigatum Hall 1847
†Isorthoceras suave Angelin and Lindström 1880
†Isorthoceras subcostatum Portlock 1843
†Isorthoceras sylphide Kröger and Aubrechtová 2019
†Isorthoceras urdr Kröger and Aubrechtová 2019
†Isorthoceras vexilli Kröger and Aubrechtova 2017
†Isorthoceras wahlenbergi Niko 2007
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Aberhan et al. 2004 | |||||
Age range: base of the Burrellian to the top of the Telychian or 456.60000 to 432.90000 Ma
Collections (59 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Turinian | USA (Missouri) | Orthoceras sociale (175724) | |
| Blackriveran | USA (Illinois, Iowa, Wisconsin) | Orthoceras junceum (23753 23756 23757 23758) | |
| Blackriveran - Rocklandian | USA (Minnesota) | Orthoceras junceum (23691) | |
| Kirkfieldian | USA (Illinois, Iowa, Wisconsin) | Orthoceras junceum (23766 23767) | |
| Kirkfieldian | USA (Kentucky) | I. albersi (87821 87825) | |
| Rocklandian - Kirkfieldian | USA (Illinois, Iowa, Wisconsin) | Orthoceras junceum (23762) | |
| Rocklandian - Kirkfieldian | USA (Minnesota) | Orthoceras junceum (23708) | |
| Shermanian | USA (Illinois, Iowa, Wisconsin) | Orthoceras junceum (23768 23769 23770 23771 23773 23775 23776 23777) | |
| Shermanian | USA (Ohio) | I. albersi (88134) | |
| Shermanian | USA (Kentucky) | I. albersi (87813 87822 87839) Orthoceras albersi (87974) | |
| Shermanian | USA (Minnesota) | Orthoceras junceum (23711 23717) | |
| Longvillian | Ireland (Leinster) | I. sp. (89132) | |
| Burrellian | Ireland (Leinster) | I. sp. (89135) | |
| Keila | Estonia (Harju) | I. cavi (188680) I. cavi, I. maris (169041) I. cavi, I. vexilli (87273) I. maris (188683) | |
| Keila | Estonia (Vasalemma) | I. cavi, I. padisense, I. vexilli (188677) | |
| Keila - Oandu | Sweden (Dalarne) | I. nikwis (161744) I. sp., I. sylphide (73855) I. sp., I. verdandi, I. cavi, I. maris, I. nikwis, I. sylphide, I. urdr (73411) | |
| Chatfieldian | USA (Kentucky) | I. albersi (87820) | |
| Katian | Sweden (Dalarna) | I. dalecarlense, I. junceum, I. wahlenbergi, I. angelini, I. elongatocinctum, I. heroyense, I. suave (124939) I. wahlenbergi (155421) | |
| Katian - Hirnantian | Sweden (Dalarne) | I. wahlenbergi, I. curvilineatum, I. elongatocinctum, I. suave (73413) | |
| Edenian | USA (Illinois, Iowa, Wisconsin) | Orthoceras junceum (23778) | |
| Edenian - Maysvillian | USA (Minnesota) | I. sociale (23741) | |
| Edenian - Maysvillian | USA (Illinois, Iowa, Wisconsin) | I. sociale (23783) | |
| Maysvillian | USA (Iowa) | I. sociale (13261 13262) | |
| Maysvillian | USA (Minnesota) | I. sociale (23744) | |
| Richmondian | USA (Michigan) | Orthoceras sociale (353) | |
| Richmondian | USA (Ohio) | I. sp. (367 368) | |
| Richmondian | USA (Iowa) | I. sp. (13204) | |
| Richmondian | United Kingdom (Northern Ireland) | Orthoceras subcostatus (89260) | |
| Pusgillian - Rawtheyan | Norway (Ringerike) | Geisonoceras heroyense (163026) | |
| Pusgillian - Rawtheyan | Norway (Langesund-Skien) | Geisonoceras heroyense (159336) | |
| Pirgu - Hirnantian | Sweden (Dalarne) | I. leptaenarum, I. suave (73409) | |
| Pirgu - Porkuni | Sweden (Dalarne) | I. wahlenbergi, I. suave (73462) | |
| Rawtheyan | Ireland (Leinster) | Geisonocerina elongatocinctum (87631) | |
| Hirnantian | Sweden (Dalarna) | I. dalecarlense, I. junceum (101023) | |
| Telychian | United Kingdom (Scotland) | Geisonocerina elongatocinctum (159986) |