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Opsidiscus
Taxonomy
Opsidiscus was named by Westergard (1949) [Sepkoski's age data: Cm uMid-u Sepkoski's reference number: 16,80]. It is not extant.
It was assigned to Eodiscidae by Whittington et al. (1997); and to Agnostida by Sepkoski (2002).
It was assigned to Eodiscidae by Whittington et al. (1997); and to Agnostida by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1946 | Aulacodiscus Westergard |
| 1949 | Opsidiscus Westergard |
| 1997 | Opsidiscus Whittington et al. p. 402 |
| 2002 | Opsidiscus Sepkoski |
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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. †Opsidiscus Westergard 1949
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†Opsidiscus bilobatus Kobayashi 1939
†Opsidiscus haimantensis Reed 1910
Invalid names: Aulacodiscus Westergard 1946 [replaced]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order | |||||
| References: Kiessling 2004, Whittington et al. 1997, Hendy 2009 | |||||
Age range: base of the Middle Cambrian to the top of the Merioneth or 506.50000 to 486.85000 Ma
Collections (16 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Amgan | Russian Federation | O. korobovi (235429 235430) | |
| Middle Cambrian | India | O. haimantensis (116463) | |
| Middle Cambrian | Greenland | O. longispinus (10484 10485) | |
| Floran | Australia (Queensland) | O. microspinus (225072) | |
| Drumian | Sweden (Jämtland) | Diplagnostus planicauda (240065 240066 240067) | |
| Mayan | Sweden (Scania) | Aulacodiscus bilobatus (225259) | |
| Mayan | Russian Federation (Gorniy Altay Republic) | O. altaicus, O. depolitus (10175) | |
| Mayan | Russian Federation | Diplagnostus planicauda (10118) | |
| Menevian | Sweden (Scania) | Diplagnostus planicauda (179691) | |
| Undillan | Australia (Queensland) | Diplagnostus bilobatus (225221) | |
| Guzhangian | Sweden (Jämtland) | Diplagnostus planicauda (240068) | |
| Merioneth | Sweden (Scania) | O. bilobatus (225141) |