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Megabalanus tintinnabulum
''Megabalanus tintinnabulum'' is a species of large barnacle in the family Balanidae. It is the type species of the genus. The specific name comes from the Latin ''ラテン語:tintinnabulum'' meaning a handbell and probably refers to the fact that small groups of barnacles resemble clusters of miniature bells.
==Taxonomy==
When Carl Linnaeus first described this species in 1758, he named it ''Balanus tintinnabulum''. The lectotype was depicted by Georg Eberhard Rumphius in 1705, the type locality being Ambon, Indonesia. In a monograph on barnacles in 1854, Charles Darwin described the species as being very variable and assigned it to Section A of the genus ''Balanus'', characterised by having the parietes, basis, and radii (different plates in the shell wall) permeated by minute pores. In 1916, Henry Augustus Pilsbry elevated ''Balanus tintinnabulum'' to subspecies rank and in subsequent years a number of varieties were described. Later it was placed in the subgenus ''Megabalanus'' and in 1976, Newman and Ross elevated ''Megabalanus'' to generic rank, giving species rank to each of the 22 subspecies of what had previously been known as ''Balanus (Megabalanus) tintinnabulum''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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