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
Green pygmy goose Green pygmy goose The green pygmy goose ("Nettapus pulchellus") is a small perching duck which breeds in southern New Guinea and northern Australia. First described in 1842 by the ornithologist John Gould, its specific name is derived from diminutive of the Latin adjective "pulcher" "pretty". It is one of three species in the Afro-Asian genus "Nettapus", an ancient and unusual group of ducks. No subspecies are recognised. Ranging from in length, it is one of the smallest species of duck. It has a wingspan. It has a small bill and compact form. The breeding male has a predominantly dark green