Three new species of Dicyema (Dicyemida: Dicyemidae) from Octopus kagoshimensis (Mollusca: Cephalopoda: Octopodidae)
Furuya, H. (2005). Three new species of Dicyema (Dicyemida: Dicyemidae) from Octopus kagoshimensis (Mollusca: Cephalopoda: Octopodidae). Species Divers. 10(4): 231-247
In: Species Diversity. Japanese Society of Systematic Zoology: Sapporo. ISSN 1342-1670, more
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| Keywords |
Taxa > Species > New taxa > New species
Cephalopoda [WoRMS]; Dicyemida [WoRMS]; Dicyemidae van Beneden, 1882 [WoRMS]; Mesozoa [WoRMS]; Octopus kagoshimensis Ortmann, 1888 [WoRMS]
Marine/Coastal |
| Author keywords |
cephalopods dicyemids infusoriform embryos mesozoans parasites renal organs Octopus kagoshimensis vermiform embryos |
| Abstract |
Three new species of dicyemid mesozoan are described from Octopus kagoshimensis Ortmann, 1888 collected off Irino in Tosa Bay, sourthern Shikoku, Japan. Dicyema tosaense sp. nov. is a small species that reaches about 800µm in length. The vermiform stages are characterized by 16-18 peripheral cells, a conical calotte, and an axial cell that extends to the base of the metapolar cells. Infusoriform embryos consist of 37 cells; two nuclei are present in each urn cell and the refringent bodies are solid. Dicyema irinoense sp. nov. is a species of medium size that reaches about 1300µm in length. The vermiform stages are characterized by 22 peripheral cells, a discshaped calotte, and an axial cell that extends to the base of the propolar cells. Infusoriform embryos consist of 37 cells; a single nucleus is present in each urn cell and the refringent bodies are solid. Dicyema sphaerocephalum sp. nov. is a species of medium size and reaches about 1000µm in length. The vermiform stages are characterized by 18-20 peripheral cells, a rounded calotte, and an axial cell that extends to the base of the propolar cells. Infusoriform embryos consist of 37 cells; two nuclei are present in each urn cell and the refringent bodies are solid. This is the first report of dicyemids in the octopus O. kagoshimensis. |
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