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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Davidonia
Taxonomy
Davidonia was named by Parkhaev (2017). It is not extant. Its type is Mellopegma rostratum.
It was assigned to Helcionellidae by Claybourn et al. (2019), Ebbestad et al. (2024).
It was assigned to Helcionellidae by Claybourn et al. (2019), Ebbestad et al. (2024).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Davidonia Parkhaev p. 574 |
| 2019 | Davidonia Claybourn et al. |
| 2024 | Davidonia Ebbestad et al. p. 1868 |
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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. †Davidonia Parkhaev 2017
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†Davidonia puppis Høyberget et al. 2015
†Davidonia rostrata Zhou and Xiao 1984
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Invalid names: Davidonia anhuiensis Zhou and Xiao 1984 [synonym], Davidonia costata Zhou and Xiao 1984 [synonym], Davidonia obliqua Landing and Bartowski 1996 [synonym], Mackinnonia davidi Bengtson et al. 1990 [synonym]
†Davidonia taconica Landing and Bartowski 1996
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy 2009, Hendy et al. 2009 | |||||
Age range: base of the Nemakit-Daldynian to the top of the Dyeran or 538.80000 to 509.70000 Ma
Collections (54 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Nemakit-Daldynian | China (Shaanxi) | Bemella costa (86566) | |
| Atdabanian | Australia (South Australia) | Mackinnonia davidi (97749) Mackinnonia rostrata (96454 96919 96920 96966 97722) | |
| Nangaoian | China (Henan) | Mellopegma rostratum (96525) Mellopegma rostratum, Bemella costa (49532) | |
| Atdabanian - Botomian | China (Anhui) | Mellopegma rostratum, Bemella anhuiensis, Bemella costa (107632) | |
| Botomian | Antarctica | D. corrugata, D. rostrata (199524) D. rostrata (199520 199522 199523) | |
| Botomian | Australia (South Australia) | Mackinnonia davidi (97751 97770 97773) Mackinnonia rostrata (50793 96914 96915 96916 96917 96932 96958 96959 96965 97700 97723 97726 97730 156332) | |
| Dyeran | Canada (Newfoundland and Labrador) | Mackinnonia taconica (50783) | |
| Dyeran | Greenland | Mackinnonia rostrata (67781) Mackinnonia taconica (49456 49459 49461 49462 49464) Mackinnonia taconica, Mackinnonia rostrata (49458 49471) | |
| Dyeran | Greenland (Peary Land) | D. rostrata, D. taconica (210618) | |
| Dyeran | Canada (Quebec) | Mackinnonia obliqua (78755) Stenotheca taconica (78754) | |
| Dyeran | USA (New York) | Mackinnonia obliqua (78763) Stenotheca taconica (78762 78764) Stenotheca taconica, Mackinnonia obliqua (78765 78766 78767 171821) | |
| Dyeran | Greenland (Lauge Koch Land) | D. rostrata, D. taconica (220278) | |
| Stage 4 | Sweden | D. puppis (236573) D. rostrata, D. puppis (236571) | |
| Toyonian | Norway (Mjøsa) | Mackinnonia puppis (174259) |