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

Kód výsledku v 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>

Nalezeny alternativní kódy

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

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10601 - Cell biology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Protist

ISSN

1434-4610

e-ISSN

1618-0941

Svazek periodika

177

Číslo periodika v rámci svazku

JUN

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

19

Strana od-do

126090

Kód UT WoS článku

001434900900001

EID výsledku v databázi Scopus

2-s2.0-85218911815