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Avonia walcottiana costata
Taxonomy
Avonia walcottiana costata was named by King (1931) [Avonia walcottiana costata]. Its type specimen is T10282a and is a 3D body fossil. Its type locality is University of Texas T240, Hill 5801, Glass Mountains, which is in a Roadian carbonate limestone in the Word Formation of Texas.
It was recombined as Avonia costata by Cloud (1944); it was recombined as Costispinifera costata by Cooper and Grant (1975).
It was recombined as Avonia costata by Cloud (1944); it was recombined as Costispinifera costata by Cooper and Grant (1975).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1931 | Avonia walcottiana costata King p. 83 figs. Pl 21, figs 8-13 |
| 1944 | Avonia costata Cloud p. 53 figs. Pl 17, figs 11,12 |
| 1960 | Costispinifera texana Muir-Wood and Cooper |
| 1975 | Costispinifera costata Cooper and Grant p. 992 |
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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.
†Avonia walcottiana costata King 1931
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Williams et al. 2000, Aberhan et al. 2004 | |||||