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22 February 2019 Acanthocephalans from Marine Fishes from Patagonia, Argentina
Jesús S. Hernández-Orts, Gema Alama-Bermejo, Néstor A. García, Enrique A. Crespo, Francisco E. Montero, Juan A. Raga, Francisco J. Aznar
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Abstract

In this study, 542 individual fish from 20 species from the Patagonian continental shelf of Argentina were examined for acanthocephalans. A total of 1,547 acanthocephalans belonging to 5 species were collected from 18 species of fish. Adult forms were represented by 2 species: Aspersentis johni (Baylis, 1929) (Heteracanthocephalidae) from longtail southern cod, Patagonotothen ramsayi (Regan) (new host record), and Breizacanthus aznari Hernández-Orts, Alama-Bermejo, Crespo, García, Raga and Montero, 2012 (Arhythmacanthidae) from raneya, Raneya brasiliensis (Kaup). Immature worms of B. aznari were also collected from the intestine of pink cusk-eel, Genypterus blacodes (Forster) (new host record). Cystacanths of 3 species of Corynosoma Lühe, 1904 (Polymorphidae) were found encapsulated in the mesenteries of fish. Corynosoma australe Johnston, 1937 was the most abundant acanthocephalan in our study, infecting 18 species of fish and accounting for >89.9% of all specimens collected. A cystacanth of Corynosoma bullosum (Linstow, 1892) was found in “castan˜ eta”, Nemadactylus bergi (Norman) (new host record), and cystacanths of Corynosoma cetaceum Johnston and Best, 1942 were collected from red searobin, Prionotus nudigula Ginsburg, and flounders Paralichthys isosceles Jordan (new host record) and Xystreurys rasile (Jordan). The Patagonian shelf of Argentina represents a new locality record for A. johni and C. bullosum. This survey is a starting point for understanding the diversity of marine acanthocephalans in Patagonian waters.

© American Society of Parasitologists 2019
Jesús S. Hernández-Orts, Gema Alama-Bermejo, Néstor A. García, Enrique A. Crespo, Francisco E. Montero, Juan A. Raga, and Francisco J. Aznar "Acanthocephalans from Marine Fishes from Patagonia, Argentina," Journal of Parasitology 105(1), 162-169, (22 February 2019). https://doi.org/10.1645/18-125
Published: 22 February 2019
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KEYWORDS
Acanthocephala
Argentina
Arhythmacanthidae
Aspersentis johni
Breizacanthus aznari
Corynosoma australe
Corynosoma bullosum
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