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Johndearia magna
Taxonomy
Ingelarella magna was named by Campbell (1960). Its type specimen is GSQ F2051, a shell (Articulated shell), and it is not a trace fossil. Its type locality is Marine Gully M137, which is in a Wuchiapingian marine siliciclastic in the Blenheim Formation of Australia.
It was recombined as Tomiopsis magna by Waterhouse (1971), Waterhouse (1983), Waterhouse (1987) and Clarke (1987); it was recombined as Martiniopsis magna by Clarke (1973); it was recombined as Johndearia magna by Waterhouse (1998).
It was recombined as Tomiopsis magna by Waterhouse (1971), Waterhouse (1983), Waterhouse (1987) and Clarke (1987); it was recombined as Martiniopsis magna by Clarke (1973); it was recombined as Johndearia magna by Waterhouse (1998).
Synonymy list
| Year | Name and author |
|---|---|
| 1960 | Ingelarella magna Campbell p. 1117 figs. Pl 140, figs 1-4 |
| 1971 | Tomiopsis magna Waterhouse p. 77 figs. Pl 17, figs 1,2,4,5,9,10 |
| 1973 | Martiniopsis magna Clarke p. 59 |
| 1978 | Ingelarella magna McClung p. 47 figs. Pl 8, fig 8 |
| 1983 | Tomiopsis magna Waterhouse p. 245 figs. Pl 2, figs 6,7,13 |
| 1987 | Tomiopsis magna Clarke p. 273 figs. 9A-G |
| 1987 | Tomiopsis magna Waterhouse p. 35 figs. Pl 11, fig 2 |
| 1998 | Johndearia magna Waterhouse |
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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.
†Johndearia magna Campbell 1960
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Waterhouse 1971 | Large transverse specimens, sulcus and fold arising well in front of umbones, sulcus with median swelling, but no subplicae; fold with median depression. Plicae low and few. Adminicula well spaced, of moderate length. Tabellae well spaced, also of moderate length. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 32.9 | 30.0 | 36.0 | 33.0 | 4.24 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Roadian to the top of the Capitanian or 272.30000 to 259.51000 Ma
Collections (23 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Roadian | Australia (New South Wales) | Ingelarella magna (136291) | |
| Roadian | Canada (Nunavut) | Tomiopsis magna (52143) | |
| Wordian | Australia (Tasmania) | Tomiopsis magna (51326) | |
| Wordian - Capitanian | Australia (Queensland) | Tomiopsis magna (104741 104742 105131) | |
| Wuchiapingian | Australia (Queensland) | Ingelarella magna (105013 type locality: 105014) Tomiopsis magna (104740 104762 104763 104766 104771 105132 120332) | |
| Wuchiapingian | Australia (Tasmania) | Martiniopsis magna (82836 83176 86153 105429 105430 105431 105434) Tomiopsis magna (51324) |