This paper reports the first observation of a tanaidacean crustacean in the gut of a chaetognath. The female tanaidacean was identified as Pseudotanais sp. in Pseudotanaidae and the arrow worm was a member of Sagittidae. The chaetognath was collected with a small plankton net attached inside a larger beam trawl. The net included bottom sediments, and female pseudotanaids are generally benthic whereas chaetognaths are planktonic, this case of predation thus may have been the result of cod-end feeding in the net.
The type-specimens of one-hundred and twenty taxa of the tribe Adoliadini from Philippines are examined and the classification of species-subspecies relations is revised. With information of the type locality and the current repository of the type or syntypes all of the taxonomic names are shown alphabetically in part 1. The annotated synonymic list is present in part 2.