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Merrillina
Taxonomy
Merrillina is a genus. It is not extant.
It was assigned to Conodontophorida by Sepkoski (2002); to Ozarkodinina by Donoghue et al. (2008); and to Ellisoniidae by Wang et al. (2023).
It was assigned to Conodontophorida by Sepkoski (2002); to Ozarkodinina by Donoghue et al. (2008); and to Ellisoniidae by Wang et al. (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 2002 | Merrillina Sepkoski |
| 2008 | Merrillina Donoghue et al. p. 138 |
| 2023 | Merrillina Wang et al. pp. 102228.5-6 |
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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.
G. †Merrillina
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. Wang et al. 2023 | The breviform digyrate P1 element is small and has a distinct cusp, with two to five discrete denticles located on the relatively low blade. The angulate digyrate P2 element is twisted distinctly. The digyrate M element has an obvious cusp and curves inwardly. The alate S0 element is triramous, inclines posteriorly and has a large ultimate denticle. The strongly arched S1 element is downward curved at the posterior end. The S2 element is bipennate with a distinct cusp located near the middle part of the process. The bipennate S3 and S4 elements are similar in morphology and generally straight. The anterior process is moderately curved inward. |
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Aberhan 1992 | |||||
Age range: base of the Wordian to the top of the Wuchiapingian or 266.90000 to 254.17000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wordian | Italy | M. galeata (97875) | |
| Wordian | Oman | M. sp. (121856) | |
| Wuchiapingian | Iran (Abadeh) | M. divergens, M. inflatus (63894) |