Description of new diplonemids (Diplonemea, Euglenozoa) and their endosymbionts: Charting the morphological diversity of these poorly known heterotrophic flagellates

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F25%3A00618251" target="_blank" >RIV/60077344:_____/25:00618251 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/25:43909819 RIV/00216208:11310/25:10497366

Result on the web

<a href="https://doi.org/10.1016/j.protis.2025.126090" target="_blank" >https://doi.org/10.1016/j.protis.2025.126090</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.protis.2025.126090" target="_blank" >10.1016/j.protis.2025.126090</a>

Result language

angličtina

Original language name

Description of new diplonemids (Diplonemea, Euglenozoa) and their endosymbionts: Charting the morphological diversity of these poorly known heterotrophic flagellates

Original language description

Diplonemids are a hyperdiverse group of flagellated protists, but with less than two dozen formally described representatives. Here, we describe four new species of cultured diplonemids, identified on the basis of their 18S rRNA sequences, light-, fluorescence-, scanning- and transmission electron microscopy. Three new species belong to the genus Rhynchopus (R. asiaticus sp.n., R. granulatus sp.n., and R. valaseki sp.n.), while the fourth species is an unusual representative of the genus Lacrimia (L. aflagellata sp.n.). The latter organism is the first diplonemid outside the genus Rhynchopus (as defined previously) to show a gliding trophic stage with flagellar stubs concealed inside the flagellar pocket and a highly motile dispersive swimming stage. Since this character is thus no longer a genus-specific apomorphy, we provide a taxonomic revision of the genus Rhynchopus with separation of the new genus Natarhynchopus gen. n. We also identify bacterial endosymbionts of L. aflagellata and R. asiaticus as Ca. Syngnamydia medusae (Chlamydiales, Simkaniaceae) and Ca. Cytomitobacter rhynchopi sp. n. (Alphaproteobacteria, Holosporaceae), respectively, and discuss their potential functions. This is the first report of a chlamydial symbiont within a diplonemid host. We also propose that diplonemids may serve as vectors for chlamydial pathogens of marine fish.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10601 - Cell biology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Protist

ISSN

1434-4610

e-ISSN

1618-0941

Volume of the periodical

177

Issue of the periodical within the volume

JUN

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

19

Pages from-to

126090

UT code for WoS article

001434900900001

EID of the result in the Scopus database

2-s2.0-85218911815