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Third-stage larvae emerge from eggs of Contracaecum osculatum (Nematoda, Anisakidae). 1993

M Køie, and H P Fagerholm
Marine Biological Laboratory, University of Copenhagen, Helsingør, Denmark.

In Contracaecum osculatum Rudolphi, 1802 (Nematoda, Anisakidae) the first and the second ecdyses occur inside the egg. Larvae forced out from the eggs by coverslip pressure are surrounded by 2 cuticles, revealing 2 previous ecdyses. It is thus the third-stage larva that emerges from the hatched egg and not the second-stage larva as previously believed. The cuticle of the first-stage larva is thin, smooth, and remains in the egg, whereas the cuticle of the second-stage larva is thick, striated, and, serving as a cover, loosely ensheaths the released larva.

UI MeSH Term Description Entries
D007814 Larva Wormlike or grublike stage, following the egg in the life cycle of insects, worms, and other metamorphosing animals. Maggots,Tadpoles,Larvae,Maggot,Tadpole
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001199 Ascaridoidea A superfamily of polymyarian nematode worms. An important characteristic of this group is the presence of three prominent lips around the mouth of the organism. Ascaroidea,Baylisascaris,Parascaris,Ascaridoideas,Ascaroideas,Baylisascari,Parascari
D017191 Ascaridida Infections Infections with nematodes of the order ASCARIDIDA. Baylisascaris Infection,Baylisascaris procyonis Infection,Infections, Ascaridida,Raccoon Roundworm Encephalitis,Raccoon Roundworm Infections,Ascaridida Infection,Baylisascaris Infections,Baylisascaris procyonis Infections,Encephalitis, Raccoon Roundworm,Infection, Ascaridida,Infection, Baylisascaris,Infection, Baylisascaris procyonis,Infection, Raccoon Roundworm,Infections, Baylisascaris,Infections, Baylisascaris procyonis,Raccoon Roundworm Encephalitides,Raccoon Roundworm Infection,Roundworm Encephalitides, Raccoon,Roundworm Encephalitis, Raccoon,Roundworm Infection, Raccoon,Roundworm Infections, Raccoon
D046048 Seals, Earless The family Phocidae, suborder PINNIPEDIA, order CARNIVORA, comprising the true seals. They lack external ears and are unable to use their hind flippers to walk. It includes over 18 species including the harp seal, probably the best known seal species in the world. Halichoerus grypus,Mirounga,Pagophilus groenlandicus,Seal, Elephant,Seal, Harp,Seals, True,Phoca groenlandica,Phocidae,Seal, Gray,Earless Seal,Earless Seals,Elephant Seal,Elephant Seals,Gray Seal,Gray Seals,Harp Seal,Harp Seals,Seal, Earless,Seal, True,Seals, Elephant,Seals, Gray,Seals, Harp,True Seal,True Seals

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