Specimens with an Artifact Appearing as ‘Three Spines’ in Milnesium tardigradum var. trispinosa Rahm, 1931 (Tardigrada)

Atsushi C. Suzuki

doi:10.2108/zs150184

Zoological Science

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Specimens with an Artifact Appearing as ‘Three Spines’ in Milnesium tardigradum var. trispinosa Rahm, 1931 (Tardigrada)

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Author: Atsushi C. Suzuki¹

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Source: Zoological Science Volume 33, Issue 4, 431 - 433 (2016); http://dx.doi.org/10.2108/zs150184

Publisher: UniBio Press

Abstract

Milnesium tardigradum trispinosa Rahm, 1931 is characterized by its three spines at the posterior end of the animal, but has never been reported since its original description. Among mounted specimens of Milnesium sp. from Japan and M. tardigradum s. s. from France, several cases with these ‘three spines’ were observed. In these samples, the character was formed by an artifact of the fixation process. Images of these specimens show such a striking similarity to Milnesium tardigradum trispinosa that this taxon must be considered as having been erroneously established as a result of misinterpretation of an artifact and no longer valid.

DOI: http://dx.doi.org/10.2108/zs150184

Received 05 11月 2015 Accepted 29 2月 2016

Acknowledgments:

I thank Dr. Reinhardt M. Kristensen (Natural History Museum of Denmark, University of Copenhagen) for his helpful advice for the tardigrade study. I also thank Drs. Paul Bartels (Warren Wilson College, USA) and Sandra J. McInnes (British Antarctic Survey) for reading the manuscript and English revision.

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