Reproduction of meso- and bathypelagic chaetognaths in the genus Eukrohnia

@article{Terazaki1982ReproductionOM,
  title={Reproduction of meso- and bathypelagic chaetognaths in the genus Eukrohnia},
  author={Makoto Terazaki and C. B. Miller},
  journal={Marine Biology},
  year={1982},
  volume={71},
  pages={193-196}
}
Reproduction of meso- and bathypelagic chaetognaths, a major group of zooplankton and hermaphroditic animals, became clear after the microscopic examination of samples collected from the Pacific Subarctic Water. Species of the genus Eukrohnia carry their developing eggs in two marsupial sacs, one on each side, and the young are retained in these marsupia for at least some period after hatching. This is in line with a general trend for low fecundity, as care of the young increases. Almost all… 

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Some specimens of Eukrohnia bathyantarctica David from the collections obtained by the United States Antarctic Research Program were observed which had marsupial sacs full of eggs, and hanging from

OBSERVATIONS AND EXPERIMENTS ON METHODS OF FERTILIZATION IN THE CHAETOGNATH SAGITTA HISPIDA

TLDR
The act of copulation of a planktonic chaetognath which leads to successful insemination and fertilization consists of a behavioral sequence in which partners maintain contact at their head ends while engaging in violent movements which result in the transfer of spermatophores.

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TLDR
The taxonomic results regarding the Chaetognatha collected during a voyage to the oceanic island of Trindade made in 1950 are presented, with a new species of the genus Pterosagitta besnardi, the second known of this genus.