cephalochordate, any of more than two dozen species belonging to the subphylum Cephalochordata of the phylum Chordata. Small, fishlike marine invertebrates, they probably are the closest living relatives of the vertebrates.

The lancelets (/ ˈ l æ n s l ɪ t s, ˈ l ɑː n-/ LA(H)N-slits), also known as amphioxi (sg.: amphioxus / ˌ æ m f i ˈ ɒ k s ə s / AM-fee-OK-səs), consist of 32 described species of "fish-like" benthic filter feeding chordates [9] in the subphylum Cephalochordata, class Leptocardii, and family Branchiostomatidae.

Nov 28, 2023 · Cephalochordata (Gr., kephale, head; chorde, cord) is a sub-phylum within the phylum Chordata. The animals in this group are small, marine invertebrates. They are commonly called lancelets or amphioxi. Cephalochordates show many typical chordate features, including a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.

Known as lancelets or as amphioxus (from the Greek for "both [ends] pointed," in reference to their shape), cephalochordates are small, eel-like, unprepossessing animals that spend much of their time buried in sand.

Cephalochordata (or lancelets, traditionally known as amphioxus, plural amphioxi) is a subphylum of marine invertebrates of the phylum Chordata. They are usually found in shallow parts of temperate or tropical seas.

Cephalochordata, also called Lancelets or Amphioxus, is marine invertebrates, like a small fish, and maybe the closest living relative to a vertebrate. They are marine animals who bury themselves completely in fine sand, coarse sand, and gravel but in finer sand, their anterior end protrudes in the shallow water.

Cephalochordata is a subphylum in the phylum chordata. The animals belonging to this subphylum are known as cephalochordates, lancelets or amphioxus. They are marine animals that possess a segmented and elongated body. They also contain a notochord that extends from the head to the tail.