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Fletcherithyris biundata
Taxonomy
Atrypa biundata was named by M'Coy (1847). It is a 3D body fossil. Its type locality is Black Head, Gerringong (W.B. Clarke coll), which is in a Wordian marine sandstone in the Gerringong Formation of Australia.
It was synonymized subjectively with Terebratula amygdala by Campbell (1965); it was recombined as Fletcherithyris biundata by Waterhouse (1982), Waterhouse (1987), Clarke (1987) and Lee et al. (2023).
It was synonymized subjectively with Terebratula amygdala by Campbell (1965); it was recombined as Fletcherithyris biundata by Waterhouse (1982), Waterhouse (1987), Clarke (1987) and Lee et al. (2023).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1847 | Terebratula amygdala Dana p. 152 |
| 1847 | Atrypa biundata M'Coy p. 20 figs. Pl 13, figs 9-9a |
| 1849 | Terebratula amygdala Dana p. 682 figs. Pl 1, figs 2a-d |
| 1961 | Fletcherina amygdala Stehli p. 453 figs. Pl 61, figs 7,10,11,14,15,19-22 |
| 1965 | Fletcherithyris amygdala Campbell p. 26 figs. Pl 3, figs 1-6; pl 6, figs 11-34; text-figs 7-9 |
| 1982 | Fletcherithyris biundata Waterhouse p. 62 figs. Pl 15e,j,17a,c |
| 1987 | Fletcherithyris biundata Clarke p. 284 figs. 19A-Z |
| 1987 | Fletcherithyris biundata Waterhouse p. 46 figs. Pl 13, figs 12-16 |
| 2023 | Fletcherithyris biundata Lee et al. p. 101 figs. 16R-AH, 17 |
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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.
†Fletcherithyris biundata M'Coy 1847
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Invalid names: Terebratula amygdala Dana 1847 [replaced]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Waterhouse 1987 | Medium-sized shells with broadly sinuate or sulciplicate anterior commissure, and low anterior ventral fold and dorsal sulcus in many specimens. Septalium high and only 0.18 to 0.22 of length of valve. Crural points very high. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 10 | 11.8 | 5.60 | 16.6 | 14.0 | 3.88 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: base of the Kungurian to the top of the Capitanian or 279.30000 to 259.51000 Ma
Collections (16 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kungurian | Australia (New South Wales) | Fletcherithyris biundata (103676 103843 230246 230251 230253) | |
| Wordian | Australia (New South Wales) | Atrypa biundata (133344 133357) Fletcherina amygdala (118117) Fletcherithyris amygdala (98110 105142 133293 133294) Terebratula amygdala (83172) | |
| Capitanian | New Zealand (Southland) | Fletcherithyris biundata (41777) | |
| Wuchiapingian | Australia (Tasmania) | Fletcherithyris amygdala (86153) Fletcherithyris biundata (51314) |