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ArticleSystematic parasitology2024

A new species of the genus Paradistomum (Platyhelminthes: Trematoda) from Iwasaki's snail-eating snake Pareas iwasakii, with a note on morphological variations of Paradistomum megareceptaculum (Tamura, 1941).

Tsukasa Waki, Masaki Hoso, Masato Nitta, Harushige Seo, Misako Urabe

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Article in Systematic parasitology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Tsukasa WakiFaculty of Science, Toho University, 2-2-1, Miyama Funabashi, Chiba, 274-8510, Japan. tsukasa.waki@sci.toho-u.ac.jp.
Masaki HosoFaculty of Education and Integrated Arts and Sciences, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo, 162-0056, Japan.
Masato NittaPresent Address: Pathology Division, Nansei Field Station, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 422-1, Nakatsuhamaura, Minami-Ise, Watarai, Mie, 516-0193, Japan.
Harushige SeoFaculty of Science, Toho University, 2-2-1, Miyama Funabashi, Chiba, 274-8510, Japan.
Misako UrabeFaculty of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan.

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6 · The paper itself

Abstract

Dicrocoeliid trematodes were detected from Iwasaki's snail-eating snake Pareas iwasakii in Iriomote Island, Okinawa Prefecture, Japan, and described as a new species Paradistomum dextra n. sp. in the present study. This new species can be distinguished from the type series of the other members of the genus based on size of eggs and morphological characteristics of body, oral and ventral suckers, and reproductive organs. However, the new species was hard to distinguish from Paradistomum megareceptaculum infecting snakes in Japan, including Iriomote Island where is the type locality of the new species, because it is closely similar to some part of the broad range of morphological variations in P. megareceptaculum. On the other hand, a partial sequence of 28S ribosomal DNA clearly distinguished these two species. Moreover, the new species' host snake Pareas iwasakii is reported to exclusively feed on land snails while host snakes of P. megareceptaculum feed on small vertebrates, indicating that the new species is also ecologically different from P. megareceptaculum. We also redescribed P. megareceptaculum based on adults sampled in this study and past studies to record the morphological variations of this species.

Indexed as

Species SpecificityTrematodaAnimalsJapanPhylogenyRNA, Ribosomal, 28SSnailsSnakesRNA, Ribosomal, 28S

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