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Richardsonella
Taxonomy
Richardsonella was named by Raymond (1924) [Sepkoski's age data: Cm Fran-u Cm Trep Sepkoski's reference number: 16,484].
It was assigned to Remopleurididae by Robison and Pantoja-Alor (1968), Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
It was assigned to Remopleurididae by Robison and Pantoja-Alor (1968), Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1924 | Richardsonella Raymond |
| 1968 | Richardsonella Robison and Pantoja-Alor p. 794 |
| 2002 | Richardsonella Jell and Adrain p. 440 |
| 2002 | Richardsonella 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. †Richardsonella Raymond 1924
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†Richardsonella convexa Rasetti 1944
†Richardsonella cristata Billings 1860
†Richardsonella elongata Rasetti 1944
†Richardsonella kainelliformis Shergold 1971
†Richardsonella megalops Billings 1860
†Richardsonella unisulcata Rasetti 1944
†Richardsonella variagranula Robison and Pantoja-Alor 1968
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Aberhan et al. 2004, Hendy et al. 2009 | |||||
Age range: base of the Paibian to the top of the Tremadocian or 497.00000 to 477.70000 Ma
Collections (19 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cambrian | USA (Alaska) | R. sp. (114979) | |
| Paibian | USA (Alaska) | R. sp. 2 (233750) | |
| Franconian - Trempealeauan | Australia (Queensland) | R. kainelliformis (198279) R. sp. (198277 198278) | |
| Merioneth | USA (Vermont) | R. arctostriata (8976) | |
| Iverian | Australia (Queensland) | R. sp. (198297) | |
| Dolgellian | Canada (Quebec) | R. convexa (8933) | |
| Trempealeauan | USA (Nevada) | R. eurekensis (233789) | |
| Trempealeauan | Canada (Quebec) | R. elongata (224133) R. megalops, R. cristata, R. convexa (224138) R. unisulcata (224136) | |
| Niuchehean | China (Jilin Provence) | R. lilia (156921 156922 156924) R. sp., R. lilia (156928) | |
| Tremadoc | Mexico (Oaxaca) | R. variagranula (9845) | |
| Tremadoc | Bolivia | R. sp. (8838) | |
| Tremadocian | Canada (Newfoundland) | R. sp. (198242) |