|
Tetrameridae is a family of spirurian nematodes. It is the smallest of the large genera making up the bulk of the superfamily Habronematoidea. Like all nematodes, they have neither a circulatory nor a respiratory system. They are parasites, chiefly of birds and cetaceans. This family contains the largest known nematode: ''Placentonema gigantissima'' is several meters long and has been found in the placenta of the Sperm Whale (''Physeter catodon''). ==Systematics== The Tetrameridae number about half a dozen genera only, but some are rather speciose; the type genus ''Tetrameres'' contains a lot of species even by nematode standards. While it might be overlumped, as presently delimited about half of the more than 100 species of Tetrameridae are placed in it. Subfamily Crassicaudinae Yorke & Maplestone, 1926 * ''Crassicauda'' Leiper & Atkinson, 1914 * ''Placentonema'' Gubanov, 1951 Subfamily Geopetitiinae Chabaud, 1951 * ''Geopetitia'' Chabaud, 1951 [Diagnostic; French, Todd, Zachary & Meehan 1992 Subfamily Tetramerinae Travassos, 1914 * ''Microhadjelia'' Jogis, 1965 * ''Microtetrameres'' Travassos, 1915 * ''Tetrameres'' Creplin, 1846 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tetrameridae」の詳細全文を読む スポンサード リンク
|