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Digenea of fishes of the Weddell Sea. V. Two new species of the genus Steringophorus [Fellodistomidae]

100%

Zdzitowiecki K.

Acta Parasitologica

1997

tom 42

nr 3

Steringophorus arntzi sp. n. is described from notothenioid fishes, Bathydraco marri (type-host, Bathydraconidae) and Dolloidraco longedorsalis (Artedidraconidae). This species resembles S. furciger (Olsson, 1868), but it is distinguished from that by eggs with a short filament, entire ovary (only with irregular margins), less elongate body and a post-bifurcal genital pore. Its area of distribution, the Antarctic, is distant from that of S. furciger (in the north hemisphere). Steringophorus liparidis sp. n. is described from Paraliparis antarcticus (Liparididae). This species resembles S. thulini Bray et Gibson, 1980, but it is distinguished by eggs with a spine on the anopercular pole, longer intestinal caeca, vitelline fields situated more anteriorly in relation to the ventral sucker, different hosts (liparidids contrary to gadiforms) and area of distribution (the Antarctic contrary to the north Atlantic). Occurrence of fellodistomid digeneans in the Antarctic subcontinental waters is recorded for the first time.

Digenea of fishes of the Weddell Sea. IV. Three opecoelid species of the genera Neolebouria, Helicometra and Stenakron

100%

Zdzitowiecki K.

Acta Parasitologica

1997

tom 42

nr 3

The following opecoelid digeneans are described from bony fishes of the Weddell Sea: Neolebouria terranovaensis Zdzitowiecki, Pisano et Vacchi, 1993 from Paraliparis antarcticus (Liparididae, new host family); Helicometra rakusai sp. n. from Trematomus loennbergi (Nototheniidae); Stenakron glacialis Zdzitowiecki, 1989 from Racovitzia glacialis (Bathydraconidae) and Pogonophryne marmorata (Artedidraconidae, new host family). H. rakusai sp. n. has terminal oral sucker (similarly to the second Antarctic species, H. antarcticae Holloway et Bier, 1968), but its ventral sucker is considerably smaller than the oral sucker - sucker ratio based on mean diameter 1:0.71-0.87 (mean 1:0.81), that based on width 1:0.65-0.99 (mean 1:0.83). Both other species are recorded in the Weddell Sea for the first time.

Ograniczanie wyników

2 Acta Parasitologica

2 Zdzitowiecki K.

2 1997

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Digenea of fishes of the Weddell Sea. V. Two new species of the genus Steringophorus [Fellodistomidae]

Digenea of fishes of the Weddell Sea. IV. Three opecoelid species of the genera Neolebouria, Helicometra and Stenakron