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Revision of Southern Hemisphere taxa referred to Fosterella (Crustacea: Cirripedia), and their extinction in response to Pleistocene cooling
Author(s) -
BUCKERIDGE John
Publication year - 2015
Publication title -
integrative zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.904
H-Index - 34
ISSN - 1749-4877
DOI - 10.1111/1749-4877.12161
Subject(s) - pleistocene , early pleistocene , extinction (optical mineralogy) , barnacle , fauna , genus , taxon , paleontology , southern hemisphere , ecology , predation , geology , northern hemisphere , plio pleistocene , neogene , temperate climate , oceanography , biology , crustacean , climatology , structural basin
Extensive barnacle coquinas (barnamols) formed around New Zealand's North and Chatham Islands during the late Pliocene to early Pleistocene. The inner‐shelf megabalanine Fosterella is the primary constituent of these lithofacies, which also include epifaunal bivalves, bryozoans and less modified balanids like Notobalanus and Notomegabalanus . The status of genus Fosterella is reviewed, 3 species are retained and a new genus, Porobalanus , is proposed for Fosterella hennigi , a species restricted to the Early Pliocene of Cockburn Island, Antarctica. Significantly, Fosterella did not survive the New Zealand Pleistocene, although Notobalanus and Notomegabalanus , which have fossil records extending back to the Early Miocene, remain important components of present day cool‐temperate Southern Hemisphere faunas. Extinction of Fosterella , in shelf waters off Argentina, is explained through a combination of changing circulatory and sedimentary regimes, competition for food and space, predation and physiological constraints. The driver of these factors was rapid regional cooling. Zoobank registration: urn:lsid:zoobank.org:pub:DBB1CB34‐83E4‐48BA‐AA10‐81823017F37A