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The distribution, origins and taxonomy of Tricellaria inopinata d'Hondt and Occhipinti Ambrogi, 1985, an invasive bryozoan new to the Atlantic
Dyrynda, P.E.J.; Fairall, V.R.; Occhipinti-Ambrogi, A.; d'Hondt, J.-L. (2000). The distribution, origins and taxonomy of Tricellaria inopinata d'Hondt and Occhipinti Ambrogi, 1985, an invasive bryozoan new to the Atlantic. J. Nat. Hist. 34(10): 1993-2006. https://dx.doi.org/10.1080/00222930050144828
In: Journal of Natural History. Taylor & Francis: London. ISSN 0022-2933; e-ISSN 1464-5262
Peer reviewed article  
Available in  Authors 
Keywords
    Classification > Taxonomy
    Distribution > Geographical distribution
    New records
    Taxa > Species > Introduced species
    Tricellaria inopinata d'Hondt & Occhipinti Ambrogi, 1985 [WoRMS]
    ANE, British Isles, England [Marine Regions]
    Marine/Coastal
Authors  Top 
  • Dyrynda, P.E.J.
  • Fairall, V.R.
  • Occhipinti-Ambrogi, A.
  • d'Hondt, J.-L., more
Abstract
    Populations of the invasive cellularine bryozoan Tricellaria inopinata d'Hondt and Occhipinti Ambrogi have recently (August 1998) been identified from the coast of southern England, representing the first Atlantic records for this taxon. Although first named from material collected in the Venice Lagoon in 1982, T. inopinata was subsequently identified as invasive there and of unspecified Pacific origin. An appraisal of samples and literature from various global regions suggests that Atlantic and Adriatic T. inopinata correspond with a morphospecies known to be invasive in New Zealand, and cryptogenic in Pacific North America, Japan and Australia. The morphospecies in question has usually been referred to as T. occidentalis (Trask, 1857) and in at least one instance as T. porteri (MacGillivray, 1889). Morphological comparisons, however, indicate that Adriatic, Atlantic and putative T. inopinata from the Pacific differs morphologically from early descriptions and specimens of T. occidentalis from Pacific North American waters and T. porteri from Australia. This study confirms the Pacific origins of Adriatic and Atlantic T. inopinata. Its widespread Pacific distribution and the possibility of anthropogenic dispersal there in historical times precludes the more precise identification of its source region. There is also a possibility that T. inopinata represents a hybrid between Pacific morphospecies united by anthropogenic translocation.
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