Molecular and morphological analysis of an Antarctic tardigrade, Acutuncus antarcticus

Hiroshi Kagoshima, Satoshi Imura, Atsushi C Suzuki

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We isolated a species of tardigrade from moss samples collected from Langhovde and Skarvsnes, near Syowa station, East Antarctic, from which we cultured a parthenogenetic strain in Petri dishes with co-occurring cyanobacteria or green algae. This culture was maintained at both 4 and 10°C, though the latter proved more suitable for growth. Eggs were laid free, rather than in exuviae. We isolated the 18S rRNA sequences from this tardigrade, identical to that ofacutuncus antarcticusfrom King George island, South Shetland islands. Morphological analyses via both light and scanning electron microscopy also show general agreement with characteristics of a. antarcticus: dorsal and ventral apophyses for the insertion of stylet muscles and dorsal longitudinal thickening on the anterior part of buccal tube; presence of pharyngeal apophyses, two macroplacoids and absence of a microplacoid; the surface structure of egg; and claw shape. Peribuccal lamellae were absent, but six oval swellings surrounded the mouth opening. An additional study of moss pillars from lake Hotoke-ike, Skarvsnes, proved the existence of the same tardigrade taxon living at the bottom of the lake.

Original languageEnglish
Pages (from-to)15-23
Number of pages9
JournalJournal of Limnology
Volume72
Issue numberSUPPL 1
DOIs
Publication statusPublished - 2013

Fingerprint

Tardigrada
moss
egg
mosses and liverworts
lake
pillar
green alga
swelling
cyanobacterium
lakes
muscle
stylets
scanning electron microscopy
claws
integument
Antarctica
Chlorophyta
Cyanobacteria
mouth
ribosomal RNA

Keywords

  • 18S rRNA
  • Antarctica
  • Cultivation
  • Exuviae
  • JARE (Japanese Antarctic Research Expedition)
  • Tardigrada

ASJC Scopus subject areas

  • Water Science and Technology
  • Aquatic Science
  • Ecology

Cite this

Molecular and morphological analysis of an Antarctic tardigrade, Acutuncus antarcticus. / Kagoshima, Hiroshi; Imura, Satoshi; Suzuki, Atsushi C.

In: Journal of Limnology, Vol. 72, No. SUPPL 1, 2013, p. 15-23.

Research output: Contribution to journalArticle

Kagoshima, Hiroshi ; Imura, Satoshi ; Suzuki, Atsushi C. / Molecular and morphological analysis of an Antarctic tardigrade, Acutuncus antarcticus. In: Journal of Limnology. 2013 ; Vol. 72, No. SUPPL 1. pp. 15-23.
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