On a new species of Hysterothylacium (Nematoda: Anisakidae) from Cauque mauleanum (Pisces: Atherinidae) by brightfield and scanning electron microscopy
Mem. Inst. Oswaldo Cruz
;
93(6): 745-52, Nov.-Dec. 1998. ilus
Article
in English
| LILACS
| ID: lil-223877
ABSTRACT
Hysterothylacium geschei n. sp. (Nematoda, Anisakidae) is described from the intestine of Cauque mauleanum (Steindachner) (Pisces Atherinidae) from Lake Panguipulli (39º43'S; 72º13'W), Chile. Eleven (78.6 per cent) out of 14 fish were infected, with a mean intensity (range) of 14.4 (1-55) worms. The new species can be differentiated from the two previously described species of freshwater fishes from South America by the presence of lateral alae, the number of caudal papillae, and the length of the spicules, oesophagus, intestinal caecum, distance vulva-anterior extremity and the length ratio intestinal caecum ventricular appendix. From the fishes examined in Lake Panguipulli, including the introduced salmonid species Oncorhynchus mykiss (Walbaum) and the authochthonous species Basilichthys australis Eigenmann (Atherinidae) and Percichthys trucha (Valenciennes) (Percichthyidae), only one specimen of P. trucha was found parasitized by a third-stage larva of this species.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Microscopy, Electron, Scanning
/
Anisakis
/
Fishes
Limits:
Animals
Country/Region as subject:
South America
/
Chile
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
1998
Type:
Article
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