| Pisidium conventus | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Subclass: | Heterodonta |
| Order: | Sphaeriida |
| Family: | Sphaeriidae |
| Genus: | Pisidium |
| Species: | P. conventus |
| Binomial name | |
| Pisidium conventus Clessin, 1877 | |
Pisidium conventus, the arctic-alpine pea clam, is a species of freshwater bivalve from the family Sphaeriidae.
The small (2.2–2.8 mm.) shell is oval in shape and thin and fragile. It is broad and flattened (laterally compressed) with flattened umbos near the midpoint. The colour is yellowish-white and the periostracum (surface) is silky with fine, concentric striation.
P. conventus is a relict of colder climatic periods found only in deep, cold, upland lakes.
Sphaerium corneum, also known as the European fingernailclam, is a very small freshwater clam, an aquatic bivalve mollusk in the family Sphaeriidae, the fingernail clams.
Pisidium casertanum, the pea cockle or pea clam, is a minute freshwater bivalve mollusc of the family Sphaeriidae.
Pisidium tenuilineatum, the fine-lined pea mussel, is a species of very small freshwater bivalve in the family Sphaeriidae.
Musculium lacustre is a species of small freshwater clam, an aquatic bivalve mollusc in the family Sphaeriidae, the fingernail clams and pea clams.
Pisidium amnicum is a species of very small freshwater clam, sometimes known as the greater European peaclam or the River pea shell. It is an aquatic bivalve in the family Sphaeriidae.
Pisidium hibernicum is a species of freshwater bivalve from the family Sphaeriidae.
Pisidium moitessierianum is a species of minute freshwater clam. It is an aquatic bivalve mollusc in the family Sphaeriidae.
Pisidium milium is a species of very small freshwater bivalve in the family Sphaeriidae, the fingernail clams and pea clams.
Pisidium supinum is a species of minute freshwater clam, a pea clam, an aquatic bivalve mollusc in the family Sphaeriidae
Pisidium pseudosphaerium is a species of freshwater bivalve from family Sphaeriidae.
Pisidium subtruncatum is a species of pill clam, a minute freshwater bivalve in the family Sphaeriidae.
Pisidium henslowanum is a species of very small freshwater clam or pea clam, an aquatic bivalve mollusc in the family Sphaeriidae. It is commonly referred to as the Henslow peaclam.
Pisidium nitidum, the shining pea clam, is a species of minute freshwater clam, an aquatic bivalve mollusc in the family Sphaeriidae, the pea clams and fingernail clams.
Pisidium personatum is a species of freshwater bivalve from the family Sphaeriidae.
Pisidium obtusale is a species of freshwater bivalve from family Sphaeriidae.
Pisidium is a genus of very small or minute freshwater clams known as pill clams or pea clams, aquatic bivalve molluscs in the family Sphaeriidae, the pea clams and fingernail clams.
Pisidium lilljeborgii is a species of freshwater bivalve from the family Sphaeriidae.
Pisidium pulchellum, the iridescent pea mussel, is a minute species of pea clam, a freshwater bivalve in the family Sphaeriidae.
The Nordic countries, or the Nordics, are a geographical and cultural region in Northern Europe and the North Atlantic, where they are most commonly known as Norden. The region includes the sovereign states of Denmark, Finland, Iceland, Norway and Sweden, as well as the autonomous countries of the Faroe Islands and Greenland, which are both part of the Kingdom of Denmark. The Åland Islands, an autonomous region of the Republic of Finland; Jan Mayen island and the archipelago of Svalbard, both unincorporated areas of Metropolitan Norway, are also included. Bouvet Island, a dependency of the Kingdom of Norway, is sometimes not considered a part of the Nordic countries due to its remote geographical location. Several regions in Europe such as Ireland, the Northern Isles of Scotland, and Estonia share cultural and ethnic ties with the Nordic nations, but are not considered to be part of the Nordic countries today. Scandinavians, who comprise over three quarters of the region's population, are the largest group, followed by Finns, who comprise the majority in Finland; other ethnic groups are the Greenlandic Inuit, the Sámi people, and recent immigrants and their descendants. The native languages Danish, Norwegian, Swedish, Icelandic, and Faroese are all North Germanic languages rooted in Old Norse. Native non-Germanic languages are Finnish, Greenlandic languages and several Sámi languages. The main religion is Lutheran Christianity.
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