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Dielasma subcirculare
Taxonomy
Dielasma subcirculare was named by Cooper and Grant (1976). Its type specimen is USNM 153338a, a shell (Articulated shell), and it is not a trace fossil.
Sister species lacking formal opinion data
D. acutangulum, D. angulata, D. arkansana, D. arkansanum, D. burlingtonensis, D. corcula, D. corculum, D. coriformes, D. crawfordsvillensis, D. crowfordsvillensis, D. elongatum, D. elongatum, D. formosa, D. formosum, D. globosa, D. hastaeforme, D. hastata, D. hochstetteri, D. hochstetteri, D. hochstetteri, D. illinoisense, D. illinoisensis, D. inflata, D. julicum, D. kingi, D. netschajewi, D. oklahomensis, D. picketti, D. sacculus, D. shumardanum, D. truncatum, D. vesicularis, D. burlingtonensis, D. formosum, D. sinualum, D. sinuatum, D. biplex, D. biplex
Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Dielasma subcirculare Cooper and Grant p. 2888 figs. Pl 755, figs 1-18; pl 757, figs 62-66 |
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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.
†Dielasma subcirculare Cooper and Grant 1976
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 6.25 | 6.10 | 6.40 | 6.25 | 0.212 |
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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 Wordian to the top of the Capitanian or 266.90000 to 259.51000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wordian | USA (Texas) | Dielasma subcirculare (101867 106138) | |
| Capitanian | USA (New Mexico) | Dielasma subcirculare (102628) | |
| Capitanian | USA (Texas) | Dielasma subcirculare (81593 101798 105894) |