Abstract
The ornamental aquarium trade has been responsible for several introductions of non-indigenous species in freshwater ecosystems. This report confirms the presence of an established non-native molly population in a tectonic, brackish, geothermal lagoon located in Greece (Lake Vouliagmeni near Athens). The Vouliagmeni molly was positively identified as the true sailfin molly, Poecilia latipinna (Lesueur, 1821), using the number of scales around the caudal peduncle as the principal diagnostic character within the sailfin molly species complex. To our knowledge, this is the first documented record of an established sailfin molly population in European waters.
Highlights
The ornamental aquarium trade accounts for a 1904
Several records of logically and behaviourally distinct species complexes, mollies are known to derive from misidentified specimens, which represent monophyletic evolutionary lineages: the such as the Vouliagmeni sailfin molly which was originally sailfin mollies of the Poecilia latipinna (Lesueur, 1821) identified as Poecilia sphenops
The Lake Vouliagmeni molly population occurs under In conclusion, the taxonomic identification of this several colour varieties that can be grossly grouped into molly presented acute difficulties stemming from three three main morphs: silver-greenish, black, and kinds of problems
Summary
The ornamental aquarium trade accounts for a 1904 (see Ptacek 2005). The shortfin molly complex consteadily growing number of fish introductions worldwide. tains an assemblage of at least 12 morphologically simi-. The sailfin molly the latter species that represent cases of misidentifications, complex, named after the strikingly enlarged dorsal fin of while on the other hand, we cannot not exclude the males, contains four sexually dimorphic species: Poecil- possibility that it reflects undetected occurrences due ia latipinna, Poecilia petenensis Günther, 1866, Poecilia to incorrect identifications.
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