Chaetognatha - Wikipedia
The Chaetognatha / kiːˈtɒɡnəθə / or chaetognaths / ˈkiːtɒɡnæθs / (meaning bristle-jaws) are a phylum of predatory marine worms that are a major component of plankton worldwide. Commonly known as arrow worms, they are mostly nektonic; however about 20% of the known species are benthic, and can attach to algae and rocks.
Phylum Chaetognatha (The Arrow Worms) - Earth Life
2020年3月2日 · The Chaetognatha are a small phylum of small, active, predatory marine worms. Because of their shape they are commonly known as Arrow Worms.
ADW: Chaetognatha: INFORMATION
The phylum Chaetognatha, also known as arrow worms, contains nearly 200 species of mostly planktonic, bilaterally symmetrical, coelomate, worm-like organisms. The phylum contains two orders, Phragmophora and Aphragmophora .
A giant stem-group chaetognath | Science Advances - AAAS
2024年1月3日 · Here, we describe a large stem chaetognath, Timorebestia koprii gen. et sp. nov., from the lower Cambrian Sirius Passet Lagerstätte, which exhibits lateral and caudal fins, a distinct head region with long antennae and a jaw apparatus similar to Amiskwia sagittiformis.
Marine Microscopic Animal, Phylum Chaetognatha - Britannica
arrowworm, any member of a group of free-living wormlike marine carnivores that belong to the invertebrate phylum Chaetognatha. The bodies of arrowworms appear transparent to translucent or opaque and are arrow shaped. There are more than 120 species, most of …
Evolutionary history of Chaetognatha inferred from molecular and ...
2014年11月21日 · Chaetognatha are a phylum of marine carnivorous animals which includes more than 130 extant species. The internal systematics of this group have been intensively debated since it was discovered in the 18th century.
Chaetognatha | Marine Plankton: A practical guide to ecology ...
Chaetognatha are also known as arrow worms because of their shape and quick darting movements in the water. The chapter covers their life cycle, ecology, and general morphology.
Arrow Worms (Phylum Chaetognatha) - iNaturalist
Chaetognatha, meaning bristle-jaws, and commonly known as arrow worms, is a phylum of predatory marine worms which are a major component of plankton worldwide. About 20% of the known species are benthic, and can attach to algae and rocks.
Chaetognatha (Arrow Worms) - Encyclopedia.com
Chaetognatha have tail fins and one or two pairs of fins on the sides of the body; all fins are supported by fin rays. The alimentary structure consists of the mouth, esophagus, gut (which can have paired diverticula), and anus.
Chaetognatha - New World Encyclopedia
Chaetognatha is a phylum of small, slender, marine worms, generally characterized by a largely transparent body, fins on both the tail and the body, and grasping bristles or hooks on each side of the mouth that are used to capture prey.