Balanoid barnacles from the Miocene of the Alaska Peninsula, and their relevance to the extant boreal barnacle fauna

The barnacle fauna of the Miocene Bear Lake Formation of the Alaska Peninsula includes Chirona ( Chirona ) alaskana n. sp., and three species of Balanus Da Costa conspecific with or related to the extant species Balanus balanus (Linnaeus), B. nubilus Darwin, and B. crenatus (Bruguière). Although the...

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Bibliographic Details
Published in:Journal of Paleontology
Main Authors: Zullo, Victor A., Marincovich, Louie
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1990
Subjects:
Paleontology
Arctic
Pacific
North Atlantic
Alaska
Online Access:http://dx.doi.org/10.1017/s002233600004230x
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002233600004230X
Description
Summary:The barnacle fauna of the Miocene Bear Lake Formation of the Alaska Peninsula includes Chirona ( Chirona ) alaskana n. sp., and three species of Balanus Da Costa conspecific with or related to the extant species Balanus balanus (Linnaeus), B. nubilus Darwin, and B. crenatus (Bruguière). Although the Bear Lake fauna lived in warm temperate waters, its modern counterparts are found primarily in boreo-arctic and cool temperate regions of the North Pacific and North Atlantic Oceans. Miocene barnacle faunas in Japan are similar to those of the Alaska Peninsula, lacking relatives of B. nubilus , but including Semibalanus Pilsbry, which does not appear until the Pleistocene in the eastern Pacific. Elements of this boreo-Arctic fauna do not appear in the North Atlantic basin until the Pleistocene, suggesting migration of the fauna into the Atlantic with the opening of the Bering Straits.

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