A slender transparent wormlike animal with fins, having spines on the head for grasping prey. It is common in marine plankton.
箭虫。亦称CHAETOGNATH
Phylum Chaetognatha
Also called chaetognath
Example sentencesExamples
Early Cambrian ‘protoconodonts’ are currently believed to be the unrelated remains of chaetognaths (or ‘arrow worms’).
Chaetognaths (commonly named arrow worms) are transparent marine metazoans, ranging in size from 2 to 120 mm.
As mentioned, the chaetognaths (‘arrow worms’) are clearly orthodox bilaterians.
Chaetognaths, commonly called arrow worms, were considered deuterostomes based on their tripartite coelom and the retention of the blastopore to form the anus.
Chaetognaths (‘arrow worms’) were considered to be deuterostomes until quite recently, when they were relocated to the protostomes.
Definition of arrow worm in US English:
arrow worm
noun
A slender transparent wormlike animal with fins, having spines on the head for grasping prey. It is common in marine plankton.
箭虫。亦称CHAETOGNATH
Phylum Chaetognatha
Also called chaetognath
Example sentencesExamples
Early Cambrian ‘protoconodonts’ are currently believed to be the unrelated remains of chaetognaths (or ‘arrow worms’).
As mentioned, the chaetognaths (‘arrow worms’) are clearly orthodox bilaterians.
Chaetognaths (‘arrow worms’) were considered to be deuterostomes until quite recently, when they were relocated to the protostomes.
Chaetognaths, commonly called arrow worms, were considered deuterostomes based on their tripartite coelom and the retention of the blastopore to form the anus.
Chaetognaths (commonly named arrow worms) are transparent marine metazoans, ranging in size from 2 to 120 mm.