Back to Search
Start Over
Molecular Phylogenetic Positions and Ultrastructure of Marine Gregarines (Apicomplexa) Cuspisella ishikariensis n. gen., n. sp. and Loxomorpha cf. harmothoe from Western Pacific scaleworms (Polynoidae).
- Source :
-
The Journal of eukaryotic microbiology [J Eukaryot Microbiol] 2018 Jul; Vol. 65 (5), pp. 637-647. Date of Electronic Publication: 2018 Feb 21. - Publication Year :
- 2018
-
Abstract
- Marine gregarines are unicellular parasites of invertebrates commonly found infecting the intestine and coelomic spaces of their hosts. Situated at the base of the apicomplexan tree, marine gregarines offer an opportunity to explore the earliest stages of apicomplexan evolution. Classification of marine gregarines is often based on the morphological traits of the conspicuous feeding stages (trophozoites) in combination with host affiliation and molecular phylogenetic data. Morphological characters of other life stages such as the spore are also used to inform taxonomy when such stages can be found. The reconstruction of gregarine evolutionary history is challenging, due to high levels of intraspecific variation of morphological characters combined with relatively few traits that are taxonomically unambiguous. The current study combined morphological data with a phylogenetic analysis of small subunit rDNA sequences to describe and establish a new genus and species (Cuspisella ishikariensis n. gen., n. sp.) of marine gregarine isolated from the intestine of a polynoid host (Lepidonotus helotypus) collected from Hokkaido, Japan. This new species possesses a set of unusual morphological traits including a spiked attachment apparatus and sits on a long branch on the molecular phylogeny. Furthermore, this study establishes a molecular phylogenetic position for Loxomorpha cf. harmothoe, a previously described marine gregarine, and reveals a new group of gregarines that infect polynoid hosts.<br /> (© 2018 The Author(s) Journal of Eukaryotic Microbiology © 2018 International Society of Protistologists.)
- Subjects :
- Animals
Apicomplexa classification
Apicomplexa genetics
Apicomplexa ultrastructure
DNA, Protozoan genetics
Intestines parasitology
Japan
Phylogeny
Trophozoites genetics
Trophozoites growth & development
Trophozoites isolation & purification
Trophozoites ultrastructure
Apicomplexa isolation & purification
Polychaeta parasitology
Subjects
Details
- Language :
- English
- ISSN :
- 1550-7408
- Volume :
- 65
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- The Journal of eukaryotic microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 29399925
- Full Text :
- https://doi.org/10.1111/jeu.12509