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Pisidium conventus Clessin, 1877 | ||
| Familia | Sphaeriidae | |
| Ordo | Veneroida | |
| Classis | Bivalvia | |
| Typus | Mollusca | |
| Summary | Pisidium conventus belongs to the rarest mussels occurring in Poland. It is a Holarctic, circumpolar species. In Poland it is known from 6 localities, of which 5 have not been confirmed for several tens of years. They were located in the Masurian Lakes, Suwałki Lake District and in the Pomerania Lake District. It lives in the profundal of large lakes. P. conventus is a stenotopic species and its optimum temperature conditions are 3.86°C-6.85°C. The populations of this mussel are threatened because of its susceptibility to environmental changes and a small number of localities, situated in lakes endangered with degradation due to water pollution and increasing eutrophication. The species is not protected by law but some localities are within protected area (Suwałki Landscape Park, Tuchola Forest National Park). | |
| Literature | Berger L. 1960. Badania nad mięczakami (Mollusca) Pojezierza Mazurskiego. Bad. Fizjogr. Pol. Zach. 4: 7-49.  Ellis A.E. 1978. British freshwater bivalve mollusca. The Linnean Society of London. Academic Press, London, New York, San Francisco, 109 pp., 39 figs., XV pl. Feliksiak S. 1938. Pisidium subtruncatum Malm v. tenuilineatiformis v. n. oraz kilka nowych lub rzadkich dla Polski groszkówek (Pisidium C. Pfeiffer). Fragm. faun. Mus. Zool. Pol. 3: 485-493. Glöer P., Meier-Brook C., Ostermann O. 1992. Süßwassermollusken. DJN, 5. Aufl. Hamburg, 81. Heard W.H. 1963. The biology of Pisidium (Neopisidium) conventus Clessin (Pleycypoda: Sphaeridae). Papers of the Michigan Academy of Science, Arts, and Letters 48: 77-85. Kuiper J.G.J. 1974. Een pleistocene vondst van Pisidium conventus Clessin in Nederland en de huidige geografische verspreiding van deze sort in Europa. Basteria, Leiden, 38: 27-40. Meier-Brook C. 1970. Untersuchungen zur Biologie einiger Pisidium-Arten. Arch. Hydrobiol., Suppl. (Stuttgart) 38: 73-150. Meier-Brook C. 1975. Der ökologische Indikatorwert mitteleuropäischer Pisidium-Arten (Mollusca, Eulamellibranchiata). Eiszeitalter u. Gegenwar, Öhringen, 26: 190-195. Piechocki A. 1989. The Sphaeridae of Poland (Bivalvia, Eulamellibranchiata). Ann. Zool. 42: 249-320. Piechocki A. 2002. Zasięg pionowy i liczebność groszkówek (Pisidium C. Pfeiffer) (Bivalvia, Heterodonta) w Jeziorze Ostrowite, Park Narodowy "Bory Tucholskie". W: XVIII Krajowe Seminarium Malakologiczne, Szczecin-Lubin, 24-26 kwietnia 2002. Zakład Paleooceanologii Uniwersytetu Szczecińskiego, Szczecin: 27-28. Piechocki A., Dyduch-Falniowska A. 1993. Mięczaki (Mollusca). Małże (Bivalvia). W: Fauna Słodkowodna Polski, z. 7A, Polskie Towarzystwo Hydrobiologiczne. Wyd. Nauk. PWN, Warszawa, 200 ss. Urbański J. 1957. Krajowe ślimaki i małże. Klucz do oznaczania wszystkich gatunków dotąd w Polsce wykrytych. PZWS, Warszawa, 247 ss. Zeissler H. 1971. Die Muschel Pisidium Bestimmungstabelle für die mitteleuropäischen Sphaericeae. Limnologica 8, 2: 453-503. | |
| Author | Anna Dyduch-Falniowska & Katarzyna Zając | |
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