Phylogenetic position and morphology of Raphidiophrys elongata sp. nov. (Haptista › Научные исследования в СПбГУ

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Phylogenetic position and morphology of Raphidiophrys elongata sp. nov. (Haptista : Centroplasthelida) with notes on cyst wall structure and evolution. / Drachko, Daria; Mikhailovskii, Vladimir; Shishkin, Yegor; Zlatogursky, Vasily V.

в: European Journal of Protistology, Том 81, 125836, 10.2021.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{b9189c2788234d7ea40655376d1e3a7c,

title = "Phylogenetic position and morphology of Raphidiophrys elongata sp. nov. (Haptista: Centroplasthelida) with notes on cyst wall structure and evolution",

abstract = "The majority of centrohelids bear external coverings consisting of organic spicules or siliceous scales. Cyst coverings are usually reinforced with additional layers of modified scales. The cyst wall of Raphidiophrys heterophryoidea has an unusual and complex structure. It consists of three different types of scales and includes the mosaic scale layer not known in other centrohelids. During excystment, the cyst wall fragments along the sutures of the mosaic layer. For other Raphidiophrys species, cyst coverings are not studied. The present paper describes a new Raphidiophrys species, R. elongata, belonging to the NC7 environmental clade. Trophozoites bore thin plate scales with reduced upper plate. Under starvation, cysts emerged in clonal cultures. Cyst coverings of R. elongata and R. heterophryoidea were studied in comparison with the use of FIB-SEM. Cyst wall of R. elongata was significantly thinner than in R. heterophryoidea and was formed with 3–5 layers of uniform overlapping scales. No mosaic scale layer was present. During excystment, trophozoite exited cyst shell through random fissure. Possible evolutionary events and driving forces behind the complication of cyst wall within Raphidiophrys were discussed.",

keywords = "Cell coverings, Cysts, Heliozoa, Phylogeny, Scales, Ultrastructure, HELIOZOEA, RAPHIDOCYSTIS",

author = "Daria Drachko and Vladimir Mikhailovskii and Yegor Shishkin and Zlatogursky, {Vasily V.}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier GmbH",

year = "2021",

month = oct,

doi = "10.1016/j.ejop.2021.125836",

language = "English",

volume = "81",

journal = "European Journal of Protistology",

issn = "0932-4739",

publisher = "Urban und Fischer Verlag GmbH und Co. KG",

}

RIS

TY - JOUR

T1 - Phylogenetic position and morphology of Raphidiophrys elongata sp. nov. (Haptista

T2 - Centroplasthelida) with notes on cyst wall structure and evolution

AU - Drachko, Daria

AU - Mikhailovskii, Vladimir

AU - Shishkin, Yegor

AU - Zlatogursky, Vasily V.

PY - 2021/10

Y1 - 2021/10

N2 - The majority of centrohelids bear external coverings consisting of organic spicules or siliceous scales. Cyst coverings are usually reinforced with additional layers of modified scales. The cyst wall of Raphidiophrys heterophryoidea has an unusual and complex structure. It consists of three different types of scales and includes the mosaic scale layer not known in other centrohelids. During excystment, the cyst wall fragments along the sutures of the mosaic layer. For other Raphidiophrys species, cyst coverings are not studied. The present paper describes a new Raphidiophrys species, R. elongata, belonging to the NC7 environmental clade. Trophozoites bore thin plate scales with reduced upper plate. Under starvation, cysts emerged in clonal cultures. Cyst coverings of R. elongata and R. heterophryoidea were studied in comparison with the use of FIB-SEM. Cyst wall of R. elongata was significantly thinner than in R. heterophryoidea and was formed with 3–5 layers of uniform overlapping scales. No mosaic scale layer was present. During excystment, trophozoite exited cyst shell through random fissure. Possible evolutionary events and driving forces behind the complication of cyst wall within Raphidiophrys were discussed.

AB - The majority of centrohelids bear external coverings consisting of organic spicules or siliceous scales. Cyst coverings are usually reinforced with additional layers of modified scales. The cyst wall of Raphidiophrys heterophryoidea has an unusual and complex structure. It consists of three different types of scales and includes the mosaic scale layer not known in other centrohelids. During excystment, the cyst wall fragments along the sutures of the mosaic layer. For other Raphidiophrys species, cyst coverings are not studied. The present paper describes a new Raphidiophrys species, R. elongata, belonging to the NC7 environmental clade. Trophozoites bore thin plate scales with reduced upper plate. Under starvation, cysts emerged in clonal cultures. Cyst coverings of R. elongata and R. heterophryoidea were studied in comparison with the use of FIB-SEM. Cyst wall of R. elongata was significantly thinner than in R. heterophryoidea and was formed with 3–5 layers of uniform overlapping scales. No mosaic scale layer was present. During excystment, trophozoite exited cyst shell through random fissure. Possible evolutionary events and driving forces behind the complication of cyst wall within Raphidiophrys were discussed.

KW - Cell coverings

KW - Cysts

KW - Heliozoa

KW - Phylogeny

KW - Scales

KW - Ultrastructure

KW - HELIOZOEA

KW - RAPHIDOCYSTIS

UR - http://www.scopus.com/inward/record.url?scp=85116446616&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/e6348bfc-5df8-3bb5-a5ac-46a1c2d24962/

U2 - 10.1016/j.ejop.2021.125836

DO - 10.1016/j.ejop.2021.125836

M3 - Article

AN - SCOPUS:85116446616

VL - 81

JO - European Journal of Protistology

JF - European Journal of Protistology

SN - 0932-4739

M1 - 125836

ER -

ID: 88712542

Phylogenetic position and morphology of Raphidiophrys elongata sp. nov. (Haptista: Centroplasthelida) with notes on cyst wall structure and evolution

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