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THE TAXONOMICAL OUTLINE OF CHAETOGNATHASome of the next articles are maybe not open access.
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1950
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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2017
This chapter describes the taxonomy of Chaetognatha, a small phylum of exclusively marine organisms with approximately 150 species currently recognized, of which about 70 are pelagic. Chaetognatha are also known as arrow worms because of their shape and quick darting movements in the water.
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This chapter describes the taxonomy of Chaetognatha, a small phylum of exclusively marine organisms with approximately 150 species currently recognized, of which about 70 are pelagic. Chaetognatha are also known as arrow worms because of their shape and quick darting movements in the water.
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Photoreception in Chaetognatha
1984Chaetognaths have a pair of eyes below the epidermis on the dorsal surface of the head; an inverted type in the genus Sagitta and an everted type in the genus Eukrohnia. The inverted type is composed of capsule cells surrounding the external surface, one pigment cell at the center of the eye, photoreceptor cells extending distal processes into ...
T. Goto, M. Yoshida
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Nervous System in Chaetognatha
1987The nervous system of chaetognatha consists of 6 ganglia in the head region, one ventral ganglion in the body, nerves connecting these ganglia and peripheral nerves passing out of these ganglia. The ganglia in the head region are the cerebral ganglion, a pair of vestibular ganglia, a pair of oesophageal ganglia, and a suboesophageal ganglion.
T. Goto, M. Yoshida
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Distribution Patterns In Chaetognatha
1991Abstract Chaetognatha are holoplanktonic animals, except for the genera Spadella, Bathyspadella and Krohnittella. They are found in all oceans and seas, from coast to coast and from the surface to the bottom; they have even invaded estuarine habitats.
A C Pierrot-Bults, V R Nair
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1984
Chaetognata (arrow worms) are a hermaphroditic phylum. The male reproductive tract, consisting of paired testes, vasa deferentia and seminal vesicles, is located in the caudal region of the body. Within the seminal vesicles of mature organisms, the filiform spermatozoa are packed into aggregates which are of the same size and shapaas the seminal ...
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Chaetognata (arrow worms) are a hermaphroditic phylum. The male reproductive tract, consisting of paired testes, vasa deferentia and seminal vesicles, is located in the caudal region of the body. Within the seminal vesicles of mature organisms, the filiform spermatozoa are packed into aggregates which are of the same size and shapaas the seminal ...
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Systematics of The Chaetognatha
1991Abstract In recent years the number of species, genera, and families within the Chaetognaths has exploded. In his revision of the phylum Ritter-Záhony (1911a) recognized 27 species in six genera. In his 1965a revision, Tokioka recognized 58 species in 15 genera.
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Hair-fan patterns in the Chaetognatha
Canadian Journal of Zoology, 1978Chaetognaths are important marine predators which rely on external sensory hairs to receive prey-produced vibrations, enabling them to recognize and locate their food. Hair-fan patterns are mapped for both larvae and adults of Sagitta hispida, Sagitta enflata, and Spadella schizoptera, for several sizes of Sagitta elegans, and for adults of Spadella ...
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