{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,7]],"date-time":"2026-09-07T13:07:41Z","timestamp":1788786461175,"version":"build-2803163510"},"reference-count":44,"publisher":"Pensoft Publishers","license":[{"start":{"date-parts":[[2021,9,8]],"date-time":"2021-09-08T00:00:00Z","timestamp":1631059200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ZK"],"abstract":"<jats:p>Two new species of the genus <jats:italic>Dugesia<\/jats:italic> (Platyhelminthes, Tricladida, Dugesiidae) from the tropical monsoon forest in southern China are described on the basis of an integrative taxonomic study involving morphology, karyology, histology, and molecular analyses. The new species <jats:italic>Dugesia circumcisa<\/jats:italic> Chen &amp;amp; Dong, <jats:bold>sp. nov.<\/jats:bold> is characterised by asymmetrical openings of the oviducts; right vas deferens opening at anterior portion of the seminal vesicle and the left one opening at mid-lateral portion of the seminal vesicle; two diaphragms in ejaculatory duct, the latter being ventrally displaced and opening at the tip of the penis papilla, which is provided with a nozzle; wide duct connecting male atrium and common atrium; chromosome complement triploid with 24 metacentric chromosomes. The other new species, <jats:italic>Dugesia verrucula<\/jats:italic> Chen &amp;amp; Dong, <jats:bold>sp. nov.<\/jats:bold>, is characterised by the large size of the living worm, usually exceeding 3.5 cm in length; asymmetrical openings of the oviducts; subterminal opening of ventrally displaced ejaculatory duct; vasa deferentia symmetrically opening into the postero-lateral portion of the seminal vesicle; well-developed duct between the seminal vesicle and diaphragm; single dorsal bump near the root of the penis papilla; bursal canal with pleated wall and spacious posterior section; unstalked cocoons; chromosome complement diploid with 16 metacentric chromosomes. Inter-specific molecular distances and their positions in the phylogenetic tree reveal that <jats:italic>D. circumcisa<\/jats:italic> and <jats:italic>D. verrucula<\/jats:italic> are clearly separated from their congeners.<\/jats:p>","DOI":"10.3897\/zookeys.1059.65633","type":"journal-article","created":{"date-parts":[[2021,9,8]],"date-time":"2021-09-08T14:14:28Z","timestamp":1631110468000},"page":"89-116","source":"Crossref","is-referenced-by-count":14,"title":["Two new species of Dugesia (Platyhelminthes, Tricladida, Dugesiidae) from the tropical monsoon forest in southern 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