Journal
ZOOSYSTEMATICS AND EVOLUTION
Volume 96, Issue 2, Pages 431-447Publisher
PENSOFT PUBLISHERS
DOI: 10.3897/zse.96.52484
Keywords
Molecular phylogeny; taxonomy; histochemistry; acetylcholinesterase (AChE)
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Funding
- Special Funds for the Cultivation of Guangdong College Students' Scientific and Technological Innovation (Climbing Program Special Funds) [pdjh2020b0509]
- Shenzhen Science and Technology Application Demonstration project [KJYY20180201180253571]
- China Undergraduate Training Program for Innovation and Entrepreneurship [201910590033]
- Shenzhen University Innovation Development Fund [2019272]
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By means of an integrated approach, including molecular, morphological, anatomical and histological data, we describe a new species of freshwater flatworm of the genus Dugesia from southwest China, representing the third species recorded for the country. Morphologically, the new species, Dugesia umbonata Song & Wang, sp. nov., is particularly characterised by the presence of a muscularised hump immediately antero-dorsally to a knee-shaped bend in its bursal canal and by an ejaculatory duct that opens subterminally through the dorsal side of the penis papilla. Four molecular datasets (18S rDNA; ITS-1; 28S rDNA; COI) facilitated determination of the phylogenetic position of the new species, which belongs to a clade comprising other species from the Australasian and Oriental regions. We also analysed the structure of its major nervous system by means of the acetylcholinesterase (AChE) histochemical method and compared these results with data available for three other species of Dugesia.
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