Description of a new species of Auriculostoma (Digenea: Allocreadiidae) from Characidium heirmostigmata (Characiformes: Crenuchidae) from Argentina, using morphological and molecular data
Autor: | G. Pérez-Ponce de León, Yasmin Croci, Sergio Roberto Martorelli, Dario Balcazar, Martin Miguel Montes, Adriana Edith Almirón, Jorge Adrian Barneche |
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Rok vydání: | 2021 |
Předmět: |
0303 health sciences
Phylogenetic tree Zoology General Medicine Biology Characiformes biology.organism_classification Crenuchidae Digenea 030308 mycology & parasitology 03 medical and health sciences Sister group Genus 28S ribosomal RNA Animal Science and Zoology Parasitology Characidium 030304 developmental biology |
Zdroj: | Journal of Helminthology. 95 |
ISSN: | 1475-2697 0022-149X |
Popis: | During a parasitological survey of fishes at Iguazu National Park, Argentina, specimens belonging to the allocreadiid genus Auriculostoma were collected from the intestine of Characidium heirmostigmata. The erection of the new species is based on a unique combination of morphological traits as well as on phylogenetic analysis. Auriculostoma guacurarii n. sp. resembles four congeneric species – Auriculostoma diagonale, Auriculostoma platense, Auriculostoma tica and Auriculostoma totonacapanensis – in having smooth and oblique testes, but can be distinguished by a combination of several morphological features, hosts association and geographic distribution. Morphologically, the new species can be distinguished from both A. diagonale and A. platense by the egg size (bigger in the first and smaller in the last); from A. tica by a shorter body length, the genital pore position and the extension of the caeca; and from A. totonacapanensis by the size of the oral and ventral sucker and the post-testicular space. Additionally, one specimen of Auriculostoma cf. stenopteri from the characid Charax stenopterus (Characiformes) from La Plata River, Argentina, was sampled and the partial 28S rRNA gene was sequenced. The phylogenetic analysis revealed that A. guacurarii n. sp. clustered with A. tica and these two as sister taxa to A. cf. stenopteri. The new species described herein is the tenth species in the genus and the first one parasitizing a member of the family Crenuchidae. |
Databáze: | OpenAIRE |
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