Revision of Khawia spp. (Cestoda: Caryophyllidea), parasites of cyprinid fish, including a key to their identification and molecular phylogeny

Title:

Revision of Khawia spp. (Cestoda: Caryophyllidea), parasites of cyprinid fish, including a key to their identification and molecular phylogeny

Creator:

Scholz, Tomáš, Brabec, Jan, Kráľová-Hromadová, Ivica, Oros, Mikuláš, Bazsalovicsová, Eva, Ermolenko, Alexey, and Hanzelová, Vladimíra

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:0f4e6a2d-2b56-4419-ae97-390042c69995
uuid:0f4e6a2d-2b56-4419-ae97-390042c69995
doi:10.14411/fp.2011.020

Subject:

tapeworms, freshwater fish, comparative morphology, taxonomy, phylogenetic relationships, identification, DNA sequences, and Holarctic Region

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Monozoic cestodes of the genus Khawia Hsü, 1935 (Caryophyllidea: Lytocestidae), parasites of cyprinid fish in Europe, Asia, Africa and North America, are revised on the basis of taxonomic evaluation of extensive materials, including recently collected specimens of most species. This evaluation has made it possible to critically assess the validity of all 17 nominal species of the genus and to provide redescriptions of the following seven species considered to be valid: Khawia sinensis Hsü, 1935 (type species); K. armeniaca (Cholodkovsky, 1915); K. baltica Szidat, 1941; K. japonensis (Yamaguti, 1934); K. parva (Zmeev, 1936); K. rossittensis (Szidat, 1937); and K. saurogobii Xi, Oros, Wang, Wu, Gao et Nie, 2009. Several new synonyms are proposed: Khawia barbi Rahemo et Mohammad, 2002 and K. lutei Al-Kalak et Rahemo, 2003 are synonymized with K. armeniaca; K. coregoni Kritscher, 1990 with Caryophyllaeus laticeps (Pallas, 1781) (family Caryophyllaeidae); K. cyprini Li, 1964 and K. iowensis Calentine et Ulmer, 1961 with K. japonensis; K. dubia (Szidat, 1937) (syn. Bothrioscolex dubius Szidat, 1937) with K. rossittensis; and Tsengia neimongkuensis Li, 1964 and T. xiamenensis Liu, Yang et Lin, 1995 with K. sinensis. Khawia prussica (Szidat, 1937) (syn. Bothrioscolex prussicus Szidat, 1937) is considered to be species incertae sedis, but its morphology indicates it may belong to Caryophyllaeus Gmelin, 1790 (Caryophyllaeidae). The molecular analysis of all seven valid species, based on comparison of sequences of two nuclear ribosomal and two mitochondrial genes, has shown that the species form three major groups clustered according to their fish hosts. Five species from common and crucian carp and goldfish were grouped together, whereas K. armeniaca from barbels (Barbinae) and K. baltica from tench (Tinca) formed separate clades. In contrast, geographical distribution does not seem to play a crucial role in grouping of individual taxa. A phylogenetic tree based on morphological characters was incongruent with that inferred from molecular data, which indicates that some morphological traits may be homoplastic. A key to identification of all species of Khawia based on morphological characteristics is provided.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

197-223

Source:

Folia parasitologica | 2011 Volume:58 | Number:3

Harvested from:

CDK

Metadata only:

false