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Digenea of fishes of the Weddell Sea. III. The Lepocreadiidae [genera Neolepidapedon and Lepidapedon], parasites of Notothenioidea

100%

Zdzitowiecki K., Cielecka D.

Acta Parasitologica

1997

tom 42

nr 2

Three lepocreadiid digenean species of two genera, Neolepidapedon Manter, 1954 and Lepidapedon Stafford, 1904, occur in notothenioid fishes of the genera Trematomus (Nototheniidae), Artedidraco and Pogonophryne (both Artedidraconidae), Bathydraco and Prionodraco (both Bathydraconidae) in the Weddell Sea. Descriptions of all species, including a new one and two previously recorded in the high Antarctic, are given. Neolepidapedon trematomi Prudhoe et Bray, 1973 is recorded in 4 host species, three of the genus Trematomus (2 new host species) and Pogonophryne permitini (new host species and family), for the first time in the Weddell Sea and south to 70°S. Lepidapedon garrardi (Leiper et Atkinson, 1914) and L. balgueriasi sp. n. belong to the “Beveridgei subgroup” of Bray and Gibson (1995). L. garrardi has the excretory vesicle reaching to the level of the border between the testes and it is transferred to this subgroup from the “Garrardi subgroup”, which is renamed to the “Zubchenkoi subgroup”. This species is recorded in 9 host species (7 new hosts), for the first time in the Weddell Sea. L. balgueriasi sp. n. is recorded in 4 species of the genus Trematomus, including T. loennbergi (type-host). This species has eggs similar in number and size to L. garrardi (egg length exceeding 0.1 mm), but it has relatively smaller suckers and pharynx, and vitelline follicles confluent in the forebody and dorsally to the testes; its site is in the pyloric caeca and anterior part of the small intestine. A key to species of the “Beveridgei subgroup” of the genus Lepidapedon is given.

Occurrence of Digenea in fishes of the family Bathydraconidae in the Weddell Sea and other areas of Antarctica

100%

Zdzitowiecki K.

Acta Parasitologica

2002

tom 47

nr 4

Four digenean species, Stenakron glacialis, Lepidapedon garrardi, Steringophorus arntzi and Otodistomum cestoides (metacercariae) were recorded in three of four bathydraconid species (59 specimens) examined in the Weddell Sea. The only previously reported species, Elytroplicilloides oatesi, was found there only in other hosts. The total number of digenean species known as occurring in Bathydraconidae in Antarctica increased to 13. They were recorded in eight of ten host species examined. However, only a few specimens of most of bathydraconid species were investigated. Most of digenean species are more abundant in other fishes, especially in Nototheniidae and Channichthyidae. S. arntzi and S. glacialis normally occur in Bathydraco marri and Racovitzia glacialis respectively, but they were occasionally found also in Artedidraconidae; the latter was reported also from a liparidid. Intensities of infections are usually low, except in three large predatory species, Parachaenichthys charcoti, P. georgianus and Cygnodraco mawsoni, which can be parasitized by about 100 or more digeneans in some single hosts.

Ograniczanie wyników

2 Acta Parasitologica

2 Zdzitowiecki K.

1 Cielecka D.

1 2002

1 1997

Wyniki wyszukiwania

Digenea of fishes of the Weddell Sea. III. The Lepocreadiidae [genera Neolepidapedon and Lepidapedon], parasites of Notothenioidea

Occurrence of Digenea in fishes of the family Bathydraconidae in the Weddell Sea and other areas of Antarctica