| Petralca Temporal range: Oligocene - Miocene, 23.03–20.43 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ | |
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| Holotype specimen | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Gaviiformes |
| Family: | Gaviidae |
| Subfamily: | †Petralcinae Mlíkovský & Kovar, 1987 |
| Genus: | †Petralca Mlíkovský & Kovar, 1987 |
| Type species | |
| †Petralca austriaca Mlíkovský, 1987 | |
Petralca is an extinct genus of loon found in Oligocene and Miocene deposits of Austria. The type and only species, Petralca austriaca, was described in 1987. It is the only member of the Petralcinae subfamily. Originally thought to be the oldest representative of auk in Europe, it was reinterpreted as a member of Gaviiformes by Göhlich & Mayr (2018).
References
- Jiří Mlíkovský (1987). "Eine Neue Alkenart (Aves: Alcidae) aus dem Ober-Oligozän Österreichs" (PDF). Annalen des Naturhistorischen Museums in Wien. Ser. A. 88: 131–147. Archived from the original (PDF) on 2016-03-03. Retrieved 2018-03-05.
- Ursula B. Göhlich; Gerald Mayr (2018). "The alleged early Miocene Auk Petralca austriaca is a Loon (Aves, Gaviiformes): restudy of a controversial fossil bird". Historical Biology: An International Journal of Paleobiology. 30 (8): 1076–1083. Bibcode:2018HBio...30.1076G. doi:10.1080/08912963.2017.1333610. S2CID 90729728.
| Genera of loons and their extinct allies | |||||||||||||
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| Gaviiformes |
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| Taxon identifiers | |
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| Petralca | |
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