Due to the scanty description of Porambonites dentata Pander, 1830 and loss of its single type specimen, the name dentata has been subsequently attributed to various Ordovician to Silurian species of the genus Platystrophia s.l. with two costae in the sulcus and three on the fold. In The Natural History Museum, London, there is a complete shell identified presumably by Christian Pander himself as Spirifer dentatus from Pulkowa. That specimen is selected here as neotype to Platystrophia dentata, i.e. to a species, which on the basis of new material is restricted to the lower Darriwilian in the St Petersburg region. Considering differences in the interior of the dorsal valve, the other species (some with subspecies) of the so-called dentata-group, especially from the stratigraphically younger strata, are discussed and excluded from the material described here of P. dentata.
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Schuchert, C. & Cooper, G. A. 1932. Brachiopod genera of the suborders Orthoidea and Pentameroidea. Peabody Museum of Natural History Memoirs (New Haven), 4(1), 1–270.
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Verneuil, E. P. 1845. Paleontologie, Mollusques, Brachiopodes. In Geologie de la Russie d'Europe et des Montagnes de l'Oural, Volume 2, Part 3 (Murchison, R. I., Verneuil, E. & Keyserling, A., eds), pp. 17–395. London, Paris.
Von Buch, C. L. 1837. Über Delthyris oder Spirifer und Orthis. Physikalische Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin, Aus dem Jahre 1871, 1–79, pls 1, 2.
Zuykov, M. A. 1999. Platystrophia (Orthida, Brachiopoda) from the Arenig and lowermost Llanvirn of northwestern Russia. Proceedings of the Estonian Academy of Sciences, Geology, 48, 195–212.
Zuykov, M. A. 2001. Platystrophia (Orthida) in the Ordovician and Early Silurian of the East Baltic. In Fourth International Brachiopod Congress, London 10–14 July 2000, Systematics Association, Vol. 63, pp. 327–334. Taylor & Francis, London and New York.
Zuykov, M. A. & Harper, D. A. T. 2004. Platystrophia King, 1850 (Brachiopoda, Orthida): proposed conservation of usage by designation of Porambonites costatus Pander, 1830 (currently Platystrophia costata) as the type species of Platystrophia. Bulletin of Zoological Nomenclature, 61, 246–250.
Zuykov, M. A. & Harper, D. A. T. 2007. Platystrophia (Orthida) and new related Ordovician and Early Silurian brachiopod genera. Estonian Journal of Earth Sciences, 56, 11–34.
