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Description of Vahlkampfia signyensis n. sp (Heterolobosea), based on morphological, ultrastructural and molecular characteristics
Garstecki, T.; Brown, S.; De Jonckheere, J.F. (2005). Description of Vahlkampfia signyensis n. sp (Heterolobosea), based on morphological, ultrastructural and molecular characteristics. Eur. J. Protistol. 41(2): 119-127. dx.doi.org/10.1016/j.ejop.2005.01.003
In: European Journal of Protistology. Elsevier: Jena. ISSN 0932-4739, more
Peer reviewed article  

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Keywords
    Vahlkampfia signyensis Garstecki & De Jonckheere, 2005 [WoRMS]; Vahlkampfiidae [WoRMS]; Marine
Author keywords
    Antarctica; Vahlkampfiidae; phylogeny; temperature; 5.8S rDNA;Vahlkampfia signyensis

Authors  Top 
  • Garstecki, T.
  • Brown, S.
  • De Jonckheere, J.F., more

Abstract
    Vahlkampfia signyensis n. sp. was isolated from two soil sites at Signy Island, South Orkney Islands, maritime Antarctic. Trophozoites of the species had a typical vahlkampfiid morphology, showed eruptive movement and did not form flagellates. However, Vahlkampfia signyensis differs from other described species of the genus in a range of morphological and ultrastructural characters, as well as in its 5.8S rDNA sequence. According to its 5.8S rDNA sequence, the new species is most closely related to Vahlkampfia avara. An isolate of the new species had a temperature growth optimum of only 10 °C, and did not grow at either 30 °C or 37 °C. The low optimal growth temperature is adaptively significant for life in the maritime Antarctic.

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