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Matthevia walcotti
Taxonomy
Matthevia walcotti was named by Runnegar et al. (1979). Its type specimen is USNM 258989 (valves) and is not a trace fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1979 | Matthevia walcotti Runnegar et al. pp. 1390 - 1391 figs. pl. 1 f. 5-30 |
| 2005 | Matthevia walcotti Pojeta et al. p. 1023 figs. 3.4, 3.8 |
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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.
†Matthevia walcotti Runnegar et al. 1979
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. Runnegar et al. 1979 | The species is described from four body valves, two of which are incomplete. Each valve is very tall and conical, and apparently tapered to a sharp apex. The anterior and posterior distal edges of the valves are deeply embayed; the lateral distal edges seem to be evenly curved. Ventrally, each valve has a single deep hole on the posterior side that continues inwards to near the valve apex. |
Measurements
No measurements are available
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| Source: g = genus, c = class | |||||
| References: d'Eichwald 1840, Kiessling 2003 | |||||
Age range: Gasconadian or 485.40000 to 477.70000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Gasconadian | USA (Missouri) | Matthevia walcotti (98348) |