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Dielasma gracile
Taxonomy
Dielasma gracile was named by Cooper and Grant (1976). Its type specimen is USNM 153319a, a shell (Articulated shell), and it is not a trace fossil. Its type locality is USNM706b, Hess Canyon, Glass Mtns., which is in a Wordian offshore shelf packstone/wackestone in the Word Formation of Texas.
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 gracile Cooper and Grant p. 2876 figs. Pl 750, figs 1-22 |
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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 gracile Cooper and Grant 1976
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 9 | 5.95 | 3.70 | 10.5 | 6.50 | 2.11 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||