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Healdia ratra
Taxonomy
Healdia ratra was named by Gründel (1961).
Sister species lacking formal opinion data
H. absentia, H. alba, H. alveolata, H. arcuata, H. boggyensis, H. canyensis, H. ciscoensis, H. colinyi, H. cornigera, H. cypha, H. dahlgrueni, H. etaulensis, H. felsoorsensis, H. formosa, H. glennensis, H. harltoni, H. leguminoidea, H. limacoidea, H. longa, H. malotti, H. marginata, H. miranda, H. nucleolata, H. oblonga, H. oklahomaensis, H. ornata, H. overbrookensis, H. parva, H. postcornuta, H. pseudosimplex, H. quadrispinosa, H. squamosa, H. subcircinantis, H. subtriangula, H. torquata, H. unicornis
Synonymy list
| Year | Name and author |
|---|---|
| 1961 | Healdia ratra Gründel |
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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.
†Healdia ratra Gründel 1961
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 0.320 |
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| Source: o = order, c = class | |||||
| References: Jell and Adrain 2002, Kiessling 2004 | |||||
Age range: Artinskian or 290.10000 to 283.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | Canada (British Columbia) | Healdia ratra (106671) |