Rodelfis [2] ( lat. Rhodelphis ) is a genus of predatory single-celled plant organisms related to red algae and isolated into a new section of Rhodelphidia eukaryotes . 2 species.
| Rodelphis |
| Scientific classification |
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| Department: | Rhodelphidia Tikhonenkov, Gawryluk, Mylnikov, & Keeling, 2019 |
| Class: | Rhodelphea Tikhonenkov, Gawryluk, Mylnikov, & Keeling, 2019 |
| Order: | Rhodelphida Tikhonenkov, Gawryluk, Mylnikov, & Keeling, 2019 |
| Family: | Rhodelphidae Tikhonenkov, Gawryluk, Mylnikov, & Keeling, 2019 |
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| International Scientific Name |
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Rhodelphis
Tikhonenkov, Gawryluk, Mylnikov , & Keeling , 2019 [1] |
| Typical view |
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Rhodelphis limneticus |
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Content
Found in Vietnam and Ukraine . One species was found in a small freshwater lake Trubin in the Chernihiv region in the Desna River basin, and another was found in sea sand off the coast of the Vietnamese island Con-Dao, located in the South China Sea [2] [3] .
Unicellular predatory plant with two flagella , again lost the ability to photosynthesis. Cells are oval or conical, 10–13 µm, slightly flattened with two subapical heterodynamic flagella. Predators eating other protists. In the back of the cell has a pseudopodia with which it absorbs not only bacteria, but also other eukaryotes. Colorless predatory flagellates, related to red algae . These chloroplasts could not be detected even by electron microscopy. But at the molecular level, there are several proteins associated with chloroplasts (for example, ferredoxin , usually involved in photosynthesis). Perhaps they still have some kind of colorless, small and rudimentary primary chloroplast. Mitochondria have tubular cristae , while lamellar cristae are generally characteristic of plants [2] [3] .
Known 2 species. The genus was first described in 2019 by a group of Russian (Denis Tikhonenkov and Alexander Mylnikov ; Institute of Biology of Inland Waters RAS, Russia ), Canadian ( Ryan Gawryluk , Filip Husnik , Patrick J. Keeling ; University of British Columbia , Canada ) and German ( Elisabeth Hehenberger ; GEOMAR - Helmholtz Center for Ocean Research Kiel, Kiel , Germany ) protistologov . Using molecular genetic analysis of transcriptomes , it was proved that on the evolutionary tree of eukaryotes, rodelphis are a sister group in relation to all red algae . Moreover, rodelphis are located on the phylogenetic tree of the Archaeplastida supergroup at its very foundation, although not at the very root. Their discovery puts forward a hypothesis about the common myxotrophic unicellular ancestor of red algae and green plants, which was fed by both photosynthetic plastids and phagotrophic. The genus Rhodelphis in 2019 was allocated to a new section of eukaryotes (Rhodelphidia nom. Nov .; as well as the class Rhodelphea; order Rhodelphida; Rhodelphidae family) [2] [3] .
- Rhodelphis limneticus Tikhonenkov, Gawryluk, Mylnikov & Keeling, 2019 [4] - Ukraine [3]
- Rhodelphis marinus Tikhonenkov, Gawryluk, Mylnikov & Keeling, 2019 [5] - Vietnam [3]
The Latin name of the genus Rhodelphis ( ancient Greek ῥόδον + δελφύς ) reflects the sisterly position in relation to red algae. It comes from the combination of the Greek words ῥόδον (rose, pink) and δελφύς (uterus) [3] .