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FREE-LIVING STAGES OF THE PARASITIC COPEPOD, GANGLIOPUS PYRIFORMIS GERSTAECKER, 1854 (SIPHONOSTOMATOIDA, PANDARIDAE) REARED FROM EGGS BY KUNIHIKO IZAWA 1 ) Izawa Marine Biological Laboratory, 795-16 Kannonji, Tsu, Mie 514-0062, Japan ABSTRACT Five naupliar stages and the infective copepodid stage of the parasitic copepod, Gangliopus pyriformis Gerstaecker, 1854 are described based on free-living larvae reared from eggs detached from ovigerous females infecting the branchial lamellae of the thresher shark, Alopias vulpinus (Bontarr, 1788). Among Siphonostomatoida parasitic on fish, G . pyriformis is the first representative known to have five, and not three or fewer naupliar stages in its life cycle. The infective copepodid bears a resemblance to the encysted copepodid 1 of Amaterasia amanoiwatoi Izawa, 2008. RÉSUMÉ Chez le copépode parasite Gangliopus pyriformis Gerstaecker, 1854, cinq stades nauplius et le stade copépodite infestant, sont décrits sur des larves vivantes élevées à partir d’œufs détachés de femelles ovigères infestant les lamelles branchiales du requin Alopias vulpinus (Bontarr, 1788). Parmi les Siphonostomatoidés parasites de poissons, G. pyriformis est le premier représentant connu à avoir cinq et non trois ou moins, stades nauplius dans son cycle de vie. Le copépodite infestant ressemble au copépodite 1 enkysté de Amaterasia amanoiwatoi Izawa, 2008. INTRODUCTION Following
Crustaceana – Brill
Published: Jan 1, 2010
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