Trichonia trichonica Radoman, 1973

Radea, Canella, Parmakelis, Aristeidis, Papadogiannis, Vassilis, Charou, Despoina & Triantis, Kostas A., 2013, The hydrobioid freshwater gastropods (Caenogastropoda, Truncatelloidea) of Greece: new records, taxonomic re-assessments using DNA sequence data and an update of the IUCN Red List Categories, ZooKeys 350, pp. 1-20 : 13

Trichonia trichonica Radoman, 1973 Figure 3

New records.

Nom. AITOLOAKARNANIAS: Lake Trichonis, N shore close to Dougri, ca 15 m asl, 38°36'01"N, 21°34'10"E, three specimens on leaves and stems of Myriophyllum sp. and Potamogeton sp., depth 2-4 m, 09.iii.2012, Radea, Charou, Papadogiannis, Parmakelis.

Remarks.

Trichonia trichonica was described by Radoman (1973) from Lake Trichonis, by the NE rocky bank near Myrtia but Schütt (1980) states that the species had previously been found in the sub-littoral zone of the stony southern shore of this lake. It seems that the species was found alive and collected from Lake Trichonis for the last time in 1985 ( Szarowska 2006). Albrecht et al. (2006, 2009) referred that they did not find alive specimens of this species in Lake Trichonis in 2005, 2007 and 2008. However, a few specimens of Trichonia trichonica were discovered close to the new locality by Radea in 2009.

Frogley and Preece (2007) found that Trichonia trichonica lives on stones and aquatic vegetation at the mouth of Krya’s spring discharging at the northern bank of another ancient Greek lake, Lake Pamvotis, Ioannina, Ipirus. The fieldwork of the latter authors was carried out in 1994, 1998 and 2005. Recently, Szarowska and Falniowski (2011b) reported that in 2003 there was no trace of the spring on the northern bank of Lake Pamvotis. During our sampling in Lake Pamvotis, we were not able to relocate the species and, additionally, we ascertained that the Krya’s spring was destroyed since a water intake was built on it.