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The adult barnacle bears no resemblance to an acorn barnacle, but the larval development is typical of a barnacle, with four nauplius larval stages and one cyprid larval stage. [2] The female cyprid larva of L. panopaei has a spear-like stylet.
A fertilised egg hatches into a nauplius: a one-eyed larva comprising a head and a telson with three pairs of limbs, lacking a thorax or abdomen. This undergoes six moults, passing through five instars , before transforming into the cyprid stage.
Examination of the animal's gut contents show that it feeds on copepods, amphipods, barnacle larvae, small clams, polychaete worms and hydrozoans as well as detritus and algae. [8] Predators on gooseneck barnacles include the glaucous-winged gull ( Larus glaucescens ), the black oystercatcher ( Haematopus bachmani ), the ochre sea star ...
Nauplius of A. modestus. A. modestus is a suspension feeder. It has feathery appendages which beat rhythmically to draw plankton and other organic particles into the shell for consumption. [6] Eggs are laid and develop into nauplius larvae which are released into the phytoplankton.
Sacculina carcini, the crab hacker barnacle, [2] is a species of parasitic barnacle in the family Sacculinidae, in particular a parasitic castrator, of crabs. The crab that most often is used as a host is the green crab , the natural range of which is the coasts of Europe and North Africa. [ 2 ]
The female cypris larva in Kentrogonida settles on a host and metamorphoses into a specialized juvenile form, a kentrogon. This has no visible segmentation and no appendages except the antennules . These are used to attach the larva to the host; their only purpose is to inject a cell mass, the vermigon , into the host's hemolymph through a ...
The genus name Nauplius was published posthumously by Otto Friedrich Müller in 1785 for animals now known to be the larvae of copepods. The nauplius stage (plural: nauplii) is characterised by consisting of only three head segments, which are covered by a single carapace. The posterior body, when present, is unsegmented.
A dwarf male is sometimes found attached to the mantle or wall of a female's burrow. The developing larva may omit the nauplius stage, which is always non-feeding (lecithotrophic), [6] but always has a cyprid stage. This has chitinous teeth which are used after the larva has settled to abrade the surface and commence a burrow. [4]
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