Redescription and molecular phylogeny of Trochilia sigmoides Dujardin, 1841 (Ciliophora, Cyrtophoria) collected from South Korea

During a survey of Korean marine ciliates, Trochilia sigmoides, the type species of the genus Trochilia, was collected and examined using in vivo observation and protargol impregnation. Moreover, scanning electron microscopy and 18S rRNA gene sequencing have been applied for the first time to study...

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Bibliographic Details
Published in:European journal of protistology 2024-04, Vol.93, p.126067-126067, Article 126067
Main Authors: Choi, Ji Hye, Omar, Atef, Jung, Jae-Ho
Format: Article
Language:English
Subjects:
18S rRNA gene
Dysteriidae
Kyaroikeidae
Marine ciliates
Type species
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Summary:During a survey of Korean marine ciliates, Trochilia sigmoides, the type species of the genus Trochilia, was collected and examined using in vivo observation and protargol impregnation. Moreover, scanning electron microscopy and 18S rRNA gene sequencing have been applied for the first time to study this species. Morphologically, T. sigmoides is characterized by the small body size, the oval body outline, and the spiral dorsal ridges. The Korean population of T. sigmoides shows only minute differences to other populations reported in the literature, mainly in body size and the number of dorsal ridges. Phylogenetic analyses based on 18S rRNA gene sequences show that T. sigmoides and T. petrani are placed together with two members of the family Kyaroikeidae, causing the family Dysteriidae to be non-monophyletic. The present new data increase the knowledge about the morphology and phylogeny of the genus Trochilia and would assist in understanding the phylogenetic relationship between the free-living Dysteriidae and the parasitic Kyaroikeidae.
ISSN:0932-4739
1618-0429
DOI:10.1016/j.ejop.2024.126067