Kurzfassung
Die GattungPisotrigonia Van Hoepen hat Seitenpriorität über die besser bekannte GattungRinetrigonia Van Hoepen; sie ist daher ihr älteres Synonym. Es wird gezeigt, daß die GattungPisotrigonia aus einem Komplex eng verwandter Arten besteht, die vom unteren Tithon bis zum Maastricht reichen. Sie ist daher phyletisch von ihrem SchwestertaxonPterotrigonia getrennt. WährendPterotrigonia kosmopolitisch verbreitet ist, hatPisotrigonia eine ausgeprägt gondwanische Verbreitung. Die Unterfamilie Pterotrigoniidae wird neu analysiert; eine neue Art,Pisotrigonia laevkosta, wird aus dem Ober-Alb (cristatum-Zone) von Zululand beschrieben.
Abstract
The genusPisotrigonia Van Hoepen has page priority over the better-knownRinetrigonia Van Hoepen, of which it is thus a senior synonym. It is shown to comprise a closely allied plexus of species, ranging from Lower Tithonian to Maastrichtian, and thus phyletically distinct from its sister taxonPterotrigonia. Moreover, whereasPterotrigonia is cosmopolitan,Pisotrigonia has a distinctly Gondwanic distribution. The subfamily Pterotrigoniinae is reassessed and a new species,Pisotrigonia laevkosta, is described from the Upper Albian (Cristatum Zone) of Zululand.
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Cooper, M.R. The Gondwanic bivalvePisotrigonia (family Trigoniidae), with description of a new species. Paläont. Z. 63, 241–250 (1989). https://doi.org/10.1007/BF02989512
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DOI: https://doi.org/10.1007/BF02989512