80 years of research on planarians (Platyhelminthes, Tricladida) from Sardinia, Italy: an annotated checklist Author Stocchino, Giacinta Angela text Zootaxa 2018 2018-12-20 4532 4 539 552 journal article 27733 10.11646/zootaxa.4532.4.5 38d5db9a-4c71-408d-84d2-5b98fd8afa0d 1175-5326 2615649 807B317B-D883-439F-97B9-B0C0F09D9666 Girardia tigrina ( Girard, 1850 ) Among Dugesiidae the allochthonous American species Girardia tigrina , introduced into Europe in the first half of the last century, was recently found in the Rio Cuga basin in the northwestern part of the island, representing the first record for Sardinia ( Fig. 2 ). The population is characterized by only fissiparous individuals. At the same sampling site of these G. tigrina animals specimens of S. mediterranea were also found ( Fig. 2 ).