First morphological and molecular characterization of cystacanths of Corynosoma evae Zdzitowiecki, 1984 (Acanthocephala: Polymorphidae) from Antarctic teleost fishes

0562603 - BC 2023 RIV NL eng J - Journal Article
Hernández-Orts, Jesús S. - Lisitsyna, O. - Kuzmina, T.A.
First morphological and molecular characterization of cystacanths of Corynosoma evae Zdzitowiecki, 1984 (Acanthocephala: Polymorphidae) from Antarctic teleost fishes.
Parasitology International. Roč. 91, DEC (2022), č. článku 102616. ISSN 1383-5769. E-ISSN 1873-0329
R&D Projects: GA MŠMT(CZ) LM2015062
Grant - others:AV ČR(CZ) NASU-20-05
Program: Bilaterální spolupráce
Institutional support: RVO:60077344
Keywords : Syndermata * Fish paratenic hosts * ssu * lsu * cox 1 * Antarctica
OECD category: Genetics and heredity (medical genetics to be 3)
Impact factor: 1.9, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S1383576922000800?via%3Dihub

Cystacanths of the polymorphid acanthocephalan Corynosoma evae Zdzitowiecki, 1984 were examined and redescribed based on newly collected material from teleost fishes from coastal waters of the Galindez Island (Argentine Islands, West Antarctica). Detailed morphological data, measurements and photomicrographs, including scanning electron microscopy images, are presented. Our morphological and morphometrical analyses confirmed the validity of C. evae, however, three key characteristics of taxonomic importance (i.e., the number of rows of hooks on the proboscis, and the number and arrangement of genital spines in males) showed significant morphological variability. In addition, a genital spine in the posterior body end of a female is reported for the first time. This study provides the first sequences of the small and large subunits nuclear ribosomal RNA genes (SSU and LSU) and the mitochondrial cytochrome c oxidase subunit 1 (cox1) for C. evae. Maximum likelihood and Bayesian inference analyses of the SSU + LSU + cox1 and the cox1 datasets placed C. evae as a sister lineage to a clade formed by C. validum Van Cleave, 1953 and C. villosum Van Cleave, 1953, although with low support. In contrast, the position of C. evae in the phylogenetic analysis of the SSU + LSU dataset remained unresolved. Finally, C. arctocephali Zdzitowiecki, 1984 from pinnipeds from the subantarctic and Antarctic regions is considered as a valid species.
Permanent Link: https://hdl.handle.net/11104/0339125