The myxozoan genus Davisia Laird 1953 is preoccupied by Davisia Del Guercio 1909 (Insecta: Hemiptera). Here, Myxodavisia nomen novum is proposed to replace the preoccupied name, and a new species is described. Myxodavisia sebastisca n. sp. was found in the urinary bladder of Sebastiscus marmoratus, collected from coastal waters off Xiamen in the East China Sea. The parasite is characterized by a disporous trophozoite; spherical to subspherical spore, 13.1 ± 0.3 (12.7–13.6) by 12.3 ± 0.9 (10.9–13.5) μm in size; curved sutural line; 2 shell valves each with a long lateral appendage 119.4–335.2 μm in length; and 2 spherical or subspherical polar capsules, equal in size, 4.6 ± 0.6 (3.2–4.6) μm in diameter. Traditionally, Myxodavisia is distinguished from Ceratomyxa, Sinuolinea, and Sphaerospora spp. by having spores that possess a distinct central chamber and lateral appendages. A review of the literature reveals that the presence or absence of a clear septum between these spore components is open to interpretation. Indeed, in immature spores of M. sebastisca n. sp., there was an indication of a demarcated appendage, but in some mature spores, no clear separation was apparent. Our findings suggest that future revision of this genus is warranted, particularly once DNA sequence data become available.
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February 2008
Research Article|
February 01 2008
Replacement of the Preoccupied Name Davisia Laird 1953 and Description of a New Myxozoan Species (Myxosporea: Sinuolineidae) from Sebastiscus marmoratus (Cuvier, 1829) in the East China Sea
Yuanjun Zhao;
Yuanjun Zhao
The Key Laboratory of Animal Biology of Chongqing, Chongqing Normal University, Chongqing 400047, China
* Center for Fish Disease Research, Department of Microbiology, 220 Nash Hall, Oregon State University, Corvallis, Oregon 97331-3404
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Yang Zhou;
Yang Zhou
The Key Laboratory of Animal Biology of Chongqing, Chongqing Normal University, Chongqing 400047, China
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Michael L. Kent;
Michael L. Kent
The Key Laboratory of Animal Biology of Chongqing, Chongqing Normal University, Chongqing 400047, China
* Center for Fish Disease Research, Department of Microbiology, 220 Nash Hall, Oregon State University, Corvallis, Oregon 97331-3404
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Christopher M. Whipps
Christopher M. Whipps
The Key Laboratory of Animal Biology of Chongqing, Chongqing Normal University, Chongqing 400047, China
* Center for Fish Disease Research, Department of Microbiology, 220 Nash Hall, Oregon State University, Corvallis, Oregon 97331-3404
† To whom correspondence should be addressed
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J Parasitol (2008) 94 (1): 269–279.
Citation
Yuanjun Zhao, Yang Zhou, Michael L. Kent, Christopher M. Whipps; Replacement of the Preoccupied Name Davisia Laird 1953 and Description of a New Myxozoan Species (Myxosporea: Sinuolineidae) from Sebastiscus marmoratus (Cuvier, 1829) in the East China Sea. J Parasitol 1 February 2008; 94 (1): 269–279. doi: https://doi.org/10.1645/GE-1232.1
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