Light- and Electron-microscopical Study of Belonocystis marina sp. nov. (Eukaryota: incertae sedis)

V. I Klimov, V. V. Zlatogursky

Research output: Contribution to journalArticle

Abstract

Belonocystis Rainer, 1968 is an enigmatic protist genus, which currently lacks any supergroup affiliation. The spherical cells of this organism move on the substratum using fine non-branching pseudopodia. The cell surface is surrounded with a spiky covering. Belonocystis marina sp. nov. was studied using light- and electron microscopy. It was clearly shown that the surface structures of Belonocystis were scales, not a capsule. The new species could be distinguished by the morphology of the scales, which had a bulbous base with three “skirts” (circular latticed structures) and a spike consisting of many twisted fibrils. Each scale was associated with a short cytoplasmic outgrowth. The organic nature of these scales was confirmed by energy-dispersive X-ray microanalysis. Large multinucleated stages were discovered in the life-cycle of this organism. A survey of the cell ultrastructure revealed all the common eukaryotic organelles, including mitochondria with tubular cristae. No microtubules were detected in ult
Original languageEnglish
Pages (from-to)479–489
JournalProtist
Volume167
Issue number5
DOIs
StatePublished - 2016

Keywords

  • Belonocystis
  • Luffisphaera
  • protists
  • scales
  • ultrastructure

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