Gilbert Rahm and the Status of Mesotardigrada Rahm , 1937

Grothman, Gary T., Johansson, Carl, Chilton, Glen, Hagoshima, Hiroshi, Tsujimoto, Megumu, and Suzuki, Atsushi C. (2017) Gilbert Rahm and the Status of Mesotardigrada Rahm , 1937. Zoological Science, 34. pp. 5-10.

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The tardigrade class Mesotardigrada was erected on the basis of the description of Thermozodium esakii by Gilbert Rahm in 1937. In some characteristics, T. esakii is intermediate between members of the classes Eutardigrada and Heterotardigrada. The class Mesotardigrada is known only from Rahm's published drawings of T. esakii; no voucher specimens are known, and subsequent attempts to collect it at the locus typicus have been unsuccessful. Among the possible explanations for this situation are that Rahm may have collected specimens of a more typical tardigrade, but misinterpreted what he saw. Alternatively, changes in habitat in the area may have led to the tardigrade's extirpation. Perhaps T. esakii is a rare species, such that recent sampling efforts have been insufficient to rediscover it. Finally, Rahm's 1937 description may be an attempt at deception. Until physical evidence of T. esakii is found, the species, and by extension the class Mesotardigrada, should be considered nomen dubium.

Item ID: 48073
Item Type: Article (Research - C1)
ISSN: 2212-3830
Keywords: hot spring; Mesotardigrada; Thermozodium; nomen dubium; Tardigrada
Date Deposited: 27 Jun 2018 05:16
FoR Codes: 31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310401 Animal systematics and taxonomy @ 100%
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