Journal
ZOOLOGICAL SCIENCE
Volume 25, Issue 12, Pages 1261-1267Publisher
ZOOLOGICAL SOC JAPAN
DOI: 10.2108/zsj.25.1261
Keywords
colonia; ascidian; Diplosoma; photosymbiosis; stigma pattern; taxonomy
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Funding
- Japan Society for the Promotion of Science [20570092]
- 21st Century COE Program of the University of the Ryukyus
- Grants-in-Aid for Scientific Research [20570092] Funding Source: KAKEN
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Diplosoma variostigmatum sp. nov. is a photosymbiotic ascidian in the family Didemnidae. This species is characterized by the unique pattern of its stigma number, which is often variable within the same zoold, as well as within the same colony. The total number of stigmata per half branchiall sac varies from 22 (five, six, six, and five stigmata from the top to bottom rows) to 27 (seven, seven, seven, and six). In contrast, the stigma patterns are constant In D. ooru, D. simile, D. simileguwa, and D. virens. Thus, the stigma number and its stability (or variability) seem to be important as characters for the taxonomy of the photosymbiotic Diplosoma species.
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