Crustacean larva stop after a single copepodid stage. Once the gonads develop, there are no further moults. Chalimus (plural chalimi) is a stage of development of a copepod parasite of fish, such as the salmon louse ("Lepeophtheirus salmonis"). "Chalimus" Burmeister, 1834 is also a synonym for "Lepeophtheirus" Nordmann, 1832. The single genus in the Facetotecta, "Hansenocaris", is only known from its larvae. They were first described by Christian Andreas Victor Hensen in 1887, and named "y-nauplia" by Hans Jacob Hansen, assuming them to be the larvae of barnacles. The adults are presumed to be parasites of other animals. Crustacean larva Crustaceans may
Branta rhuax determining the affinities so precisely and that the relationships of the bird would remain doubtful until further specimens were obtained. Branta rhuax Branta rhuax is an extinct goose endemic to the Hawaiian Islands. It was initially described into the monotypic genus "Geochen" but assigned to "Branta" by Storrs L. Olson in 2013 after reexamination of the subfossil material. The bird was described in 1943 by Alexander Wetmore from subfossil remains originally discovered in 1926, in the course of a public works excavation of a water supply tunnel. The bones were found at a depth of 25 m beneath a prehistoric