This dataset contains the digitized treatments in Plazi based on the original journal article Dyrynda, P. E. J., Fairall, V. R., Ambrogi, A. Occhipinti, 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. Journal of Natural History 34 (10): 1993-2006, DOI: 10.1080/00222930050144828
Populations of the invasive cellularine bryozoan Tricellaria inopinata d’Hondt and Occhipinti Ambrogi have recently (August 1998) been identi fi ed from the coast of southern England, representing the fi rst Atlantic records for this taxon. Although fi rst named from material collected in the Venice Lagoon in 1982, T. inopinata was subsequently identi fi ed as invasive there and of unspeci fi ed 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 con fi rms 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 identi fi cation 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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