Pisidium
Pisidium supinum A. Schmidt, 1851
Order Veneroida
Family Sphaeriidae
Conservation status: in Bulgaria: Extinct EX.
General distribution. Europe and part of West Siberia.
Distribution and abundance in Bulgaria. Found in the surroundings of Maslen Nos Cape, about 70 years ago [1]. Stored in the National Museum in Prague. The species is reported by Czech malacologist O. Kroupa [1].
Habitat. Rheophil, related to rivers, occasionally found in lakes as well [2]. Prefer sand or poorly silt ground. Found also in pure marsh waters, attached to water vegetation [3].
Biology. No data
Similar species. A total of 12 species of genus Pisidium has been established in Bulgaria, part of that is difficulty distinguished.
Negative factors. Loss and degradation of habitats, getting dried; reasons inside the species, restricted distribution, low density.
Conservation measures taken. None.
References. 1. Angelov, 1984; 2. Korniushin, 1996; 3. Angelov, 2000.
Author: Zdravko Hubenov
