Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 82. (Budapest 1990)

Nesemann, H.: Investigations on two Glossiphonia species (Hirudinea) from running waters of Central Europe with a redescription of Glossiphonia concolor (Apáthy, 1888)

Colour of the dorsal side - The ground colour may very individually from greenish-greyish to light brown. Live animals of greenish colour are easily confused with G. paludosa

. The dark pigmentation is well developed only in the adults. The basic type normally contains eight dark brown to blackish pigmented paramedian stripes which may vary during development, or they may partially be missing. The interial pair are the darkest ones. Sometimes, two further stripes may exist between them medially, when, up to ten stripes are present. The type of location and size are shown in Fig. 18. The interial pair of stripes seem irregularly interrupted, but the interruptions are dirty and not clearly bordered. The location is the same as in G. complanata

. Together with the dark stripes numerous irregular small spots also exist. Welldeveloped dark pigmentation was found at the Danubian and Ukrainian specimens (see also LUKIN 1962). Colour of the ventral side - The interial dark paramedian stripes of the dorsal side also appear on the ventral side. Sometimes there are many very small spots. Eyes - The original six eyes and the size are similar to G. verrucata

, but always present. The first pair often is reduced. Habitat - The aquatic and stagnophil species is a characteristic fauna member of the Potamal, inhabiting slowly running streams of the plains, secondary branches and dead water bodies of rivers. Distribution in Central Europe: Hungarian Great Plain, plain of the Upper Rhine, elsewhere sporadic in the mountainous regions: Hirschgartenbach (Wienerwald); Fischbach (Salzburg), an output of the Lake Wallersee (leg. 0. MODG). Records: APATHY (1888), BENNIKE (1943), DALL (1982), KALBE (1965), LUKIN (1962), NESEMANN (1989a, 1989b), SOUS (1964). FAUNISTICAL DATA The occurrence of three or more Glossiphonia species, living sympatrically in the same water bodies, is most frequent in the Danubian regions of Austria and Hungary (secondary Dranches of the river Danube, lower reaches of the rivers Schwechat, Fischa and Leitha). Only G. complanata occurs more frequently in the river Rhine and its tributaries. Therefore, three species only Figs 21-22. Distribution of Glossiphonia verrucata (O) and Glossiphonia comp lanata (•) in running waters of mountainous regions. Q = both species were found together. - 21= Taunus, 22= Wienerwald