One of the mysteries of the English language finally explained.
A small elongated marine invertebrate that resembles a fish but lacks jaws and obvious sense organs. Lancelets possess a notochord and are among the most primitive chordates.
Subphylum Cephalochordata, phylum Chordata: several species, including amphioxus
- ‘In lancelets, the trunk somites extend and fuse ventrally to give the unsegmented periviscelar coelom.’
- ‘To tease out the details of the transition, other researchers recently turned to lancelets, vertebrates' closest spineless relatives.’
- ‘Unlike lancelets, however, Haikouella possessed a small number of pharyngeal bars that may have been composed of mucocartilage, as in modern lampreys.’
- ‘Biologists could examine the many living animals (such as lancelets and sea squirts) that represented stages in the transition from the invertebrates to the earliest jawless fishes.’
- ‘As examples, she worked on lampreys in the early sixties, molluscs and lancelet in the early seventies, and teleosts in the early eighties.’
Mid 19th century: from the noun lance (because of its long narrow form) + -let.
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