Protistology 11 (4), 238–247 (2017) |
Korotnevella novazelandica n. sp. (Amoebozoa, Discosea, Dactylopodida) — a new freshwater amoeba with unusual combination of scales |
1 Department of Invertebrate Zoology, Faculty of Biology, St. Petersburg State University, St. Petersburg, Russia
| Submitted November 25, 2017 | Accepted December 6, 2017 | Summary A new freshwater species of naked lobose amoebae, Korotnevella novazelandica n. sp. (Amoebozoa, Discosea, Flabellinia, Dactylopodida), from New Zealand was studied and described. This species has sombrero-shaped as well as dish-shaped scales, a combination previously not known in Korotnevella. Phylogenetic analysis based on 18S rRNA gene placed it in a clade along with Korotnevella species possessing uniform sombrero-shaped scales: K. pelagolacustris, K. jeppesenii and K. fousta. At the level of light microscopy, K. novazelandica lacks clear distinctions from the above-mentioned species, but it could be easily distinguished from them in electron microscopy by the presence of dish-shaped scales. The presence of dish-shaped scales may be considered as a primitive character for the K. pelagolacustris + K. jeppesenii + K. fousta + K. novazelandica clade, which were secondarily lost in the most of species in this clade. The sombrero-shaped scales could have evolved from basket scales or developed de novo after the loss of basket scales.
Key words: 18S rRNA gene, Korotnevella, molecular phylogeny, scales, systematics, ultrastructure
Address for correspondence: Ilya A. Udalov. Department of Invertebrate Zoology, Faculty of Biology, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia; e-mail: chlamydophrys@gmail.com |
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