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Anaspida
Taxonomy
Anaspida was named by Traquair.
It was corrected as Anaspidi by Jaekel (1911); it was reranked as the subclass Anaspida by Dineley and Metcalf (1999); it was reranked as the superclass Anaspida by Blom (2008), Long (2011); it was reranked as the class Anaspida by Nelson et al. (2016), van der Laan (2019), Reeves et al. (2023).
It was assigned to Palaeostraci by Jaekel (1911); to Agnatha by Dineley and Metcalf (1999); to Cephalaspidomorphi by Sepkoski (2002); to Vertebrata by Blom (2008); to Craniata by Long (2011); to Anaspidomorphi by Nelson et al. (2016), van der Laan (2019); and to Cyclostomata by Reeves et al. (2023).
It was corrected as Anaspidi by Jaekel (1911); it was reranked as the subclass Anaspida by Dineley and Metcalf (1999); it was reranked as the superclass Anaspida by Blom (2008), Long (2011); it was reranked as the class Anaspida by Nelson et al. (2016), van der Laan (2019), Reeves et al. (2023).
It was assigned to Palaeostraci by Jaekel (1911); to Agnatha by Dineley and Metcalf (1999); to Cephalaspidomorphi by Sepkoski (2002); to Vertebrata by Blom (2008); to Craniata by Long (2011); to Anaspidomorphi by Nelson et al. (2016), van der Laan (2019); and to Cyclostomata by Reeves et al. (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1911 | Anaspidi Jaekel p. 37 |
| 1999 | Anaspida Dineley and Metcalf p. 11 |
| 2002 | Anaspida Sepkoski |
| 2008 | Anaspida Blom p. 594 |
| 2011 | Anaspida Long p. 241 |
| 2016 | Anaspida Nelson et al. p. 29 |
| 2019 | Anaspida van der Laan p. 19 |
| 2023 | Anaspida Reeves et al. |
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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.
Cl. †Anaspida Traquair
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Or. †Anaspidiformes
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Fm. †Pharyngolepididae Kiær 1924
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G. †Pharyngolepis Kiaer 1911
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†Pharyngolepis heintzi Ritchie 1964
†Pharyngolepis oblongus Kiaer 1911
Fm. †Septentrioniidae Blom et al. 2002
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G. †Septentrionia Blom et al. 2001
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†Septentrionia dissimilis Blom et al. 2001
†Septentrionia lancifera Blom et al. 2001
†Septentrionia mucronata Blom et al. 2001
†Septentrionia seducta Blom et al. 2001
Invalid names: Rhyncholepididae Kiaer 1924 [empty]
Or. †Birkeniiformes
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Fm. †Birkeniidae Traquair 1899
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G. †Ctenopleuron Mathew 1907
G. †Rhyncholepis Kiaer 1911
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†Rhyncholepis butriangula Blom et al. 2001
†Rhyncholepis parvula Kiaer 1911
G. †Conopiscius
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Kiessling 2004, Carroll 1988 | |||||
Age range
Maximum range based only on fossils: base of the Sheinwoodian to the top of the Frasnian or 432.90000 to 372.15000 Ma
Minimum age of oldest fossil (stem group age): 430.6 Ma
Minimum age of oldest fossil (stem group age): 430.6 Ma
Collections (24 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Llandovery - Wenlock | United Kingdom (Scotland) | Birkenia sp. (26889) | |
| Telychian - Sheinwoodian | United Kingdom | Birkenia elegans (238428) | |
| Telychian - Sheinwoodian | United Kingdom (South Lanarkshire) | Birkenia elegans (195126) | |
| Sheinwoodian | United Kingdom | Birkenia elegans (238429) | |
| Wenlock | United Kingdom (Scotland) | Cowielepis richiei (26907) | |
| Wenlock | United Kingdom | Birkenia elegans (238430) | |
| Wenlock - Ludlow | Greenland | Anaspida indet. (239394) | |
| Wenlock - Ludlow | United Kingdom (Scotland) | Birkenia sp. (26906) | |
| Homerian | Norway | Rhyncholepis parvula, Pterygolepis nitida, Pharyngolepis oblonga, Pharyngolepis heintzi (239158) | |
| Homerian | Sweden | Pterygolepis nitida (179990) Rhyncholepis parvula, Pterygolepis nitida (179986 179989) Rhyncholepis parvula, Rhyncholepis butriangula, Pterygolepis nitida (179987 179988) | |
| Homerian | United Kingdom (Scotland) | Cowielepis ritchiei (84333) | |
| Rootsikula | Norway | Rhyncholepis parvulus, Pharyngolepis heintzi, Pharyngolepis oblongus (14308) | |
| Rootsikula | Estonia | Birkenia robusta (13824) | |
| Paadla | Estonia (Saaremaa) | Birkeniida sp. (195601) | |
| Ludlow | United Kingdom (Scotland) | Birkenia elegans (26896) | |
| Ludfordian | United Kingdom (Scotland) | Kerreralepis carinata (195125) | |
| Pridoli | Canada (New Brunswick) | Ctenopleuron nerepisense (161318) | |
| Ohesaare | Estonia (Saare) | Birkeniida sp. (193837) | |
| Lochkovian | Greenland | Anaspida indet. (239395) | |
| Frasnian | Canada (Quebec) | Endeiolepis aneri (179176) |