Potamon fluviatile as well as on the island of Sicily. Although it used to be found as far north as Lake Garda, "P. fluviatile" no longer occurs north of the River Po. In 1997 a population of "P. fluviatile" was discovered under the ruins of Trajan's Forum in the heart of Rome, living in canals built by the Etruscans which connect to the "Cloaca Maxima". Based on a genetic analysis, which demonstrated that these crabs were similar to those in Greece, researchers believe that they had been brought by the Greeks before the founding of the city, some 3000 years ago. The
Blechnum fluviatile associates in the mixed broadleaf/podocarp forests of Rakiura include "Blechnum blechnoides" and "Blechnum durum". It was collected by William Colenso in December 1841, at the precise locality of woods near Poverty Bay in the North Island. Blechnum fluviatile Blechnum fluviatile is a fern known in the Māori language as kiwikiwi. A herbaceous plant, "B. fluviatile" is a "hard fern" of the genus "Blechnum" in the family Blechnaceae. It was identified by Patrick Brownsey in 1979. Other common names are star fern, creek fern, kawakawa and kiwakiwa. Ladderlike fronds of "B. fluviatile" measure up to long. Growing in a distinctive ground-hugging