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The non-indigenous window shell Theora lubrica Gould, 1861 (Bivalvia: Cardiida: Semelidae) in the delta area of the Netherlands
Faasse, M.; Gheerardyn, H.; Morys, C.; van Haaren, T.; Ysebaert, T.; Nijland, R. (2019). The non-indigenous window shell Theora lubrica Gould, 1861 (Bivalvia: Cardiida: Semelidae) in the delta area of the Netherlands. Basteria 83(1-3): 52-58
In: Basteria: Tijdschrift van de Nederlandse Malacologische Vereniging. Nederlandse Malacologische Vereniging: Leiden; Lisse. ISSN 0005-6219, more
Peer reviewed article  

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Keywords
    Oxygen
    Stratification
    Abra nitida (O. F. Müller, 1776) [WoRMS]; Theora lubrica Gould, 1861 [WoRMS]
    Netherlands [Marine Regions]
Author keywords
    introduction, northwestern Europe

Authors  Top 
  • van Haaren, T.
  • Ysebaert, T., more
  • Nijland, R.

Abstract
    The non-indigenous bivalve Theora lubrica has been introduced to the southwestern delta area of the Netherlands. For several years, it has been misidentified as Abra nitida, a species with similar appearance. Theora lubrica differs from A. nitida in the presence of an internal ridge (from umbo to anteroventral margin) and a bifid cardinal tooth in the left valve. In native and newly colonised areas the bivalve is particularly a successful competitor at sites with periodical hypoxic conditions. Ecology and invasiveness are discussed.

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