Highly divergent morphology but a close molecular phylogenetic relationship between two little-known ciliate genera Actinobolina and Papillorhabdos (Protozoa : Ciliophora: Litostomatea) with description of two new species

© 2023 International Society of Protistologists..

Free-living litostomatean ciliates, prominent microeukaryote predators commonly encountered in freshwater and marine habitats, play vital roles in maintaining energy flow and nutrient cycles. Nevertheless, understanding their biodiversity and phylogenetic relationships remains challenging due to insufficient morphological information and molecular data. As a new contribution to this group, three haptorian ciliates, including two new species (Actinobolina bivacuolata sp. nov. and Papillorhabdos foissneri sp. nov.) and the insufficiently described type species, Actinobolina radians, were isolated from wetlands around Lake Weishan, China and investigated by a combination of living morphology, stained preparations, and 18S rRNA gene sequence data. An illustrated key of the valid species within the two genera is provided. In addition, we reveal the phylogenetic positions of these two genera for the first time. Although they differ in all key morphologic characters such as general appearance (ellipsoidal with numerous tentacles vs. cylindrical), extrusomes (stored in tentacles vs. anchored to pellicle), circumoral kinety (present vs. absent), composition of somatic kineties (kinetosome clusters vs. monokinetids), and number of dorsal brush rows (1 vs. 4), they both cluster in a fully supported clade in the phylogenetic tree, which indicates that the biodiversity and additional molecular markers of this group need further exploration.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:71

Enthalten in:

The Journal of eukaryotic microbiology - 71(2024), 1 vom: 04. Jan., Seite e13007

Sprache:

Englisch

Beteiligte Personen:

Chi, Yong [VerfasserIn]
Tang, Danxu [VerfasserIn]
Lei, Jingtao [VerfasserIn]
Wei, Fan [VerfasserIn]
Al-Farraj, Saleh A [VerfasserIn]
Bourland, William A [VerfasserIn]
Chen, Zigui [VerfasserIn]

Links:

Volltext

Themen:

Actinobolina bivacuolata sp. nov.
Ciliates
Journal Article
Papillorhabdos foissneri sp. nov.
Phylogeny
RNA, Ribosomal, 18S
Taxonomy

Anmerkungen:

Date Completed 05.01.2024

Date Revised 05.01.2024

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1111/jeu.13007

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM363789766