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Protaraea diffluens
According to Mõtus and Y. Zaika (2012), the species which occurred in Rakvere was first described by Eichwald in 1854. Later two type specimens of the species from Rakvere were illustrated as Diplastraea diffluens by Eichwald (1860, fig. 11a-b). Bondarenko (1980)redescribed one specimen (fig. 11b) as Diplastraea diffluens. The other specimen turned out to be another taxon (Paramongoliolites spiralis). The first specimen was selected as the lectotype of D. diffluens by Bondarenko and Gataulina (1986), but that lectotype specimen is not preserved. The only thin section of the specimen was damaged in a fire. Only a small piece of it has survived. Therefore Mõtus and Y. Zaika (2012) designated a neotype for this species redescribing it as Protaraea diffluens (Eichwald, 1854).
| Year | Name and author |
|---|---|
| 1854 | Protaraea diffluens Eichwald |
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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.
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: Oandu or 452.80000 to 451.80000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Ordovician | Estonia | Protaraea diffluens (144637 144639 144641) | |
| Late/Upper Ordovician | Russian Federation | Protaraea diffluens (144644) | |
| Oandu | Estonia | Protaraea diffluens (144640) |