Heterocypris spadix sp. nov. (Crustacea: Ostracoda: Cypridoidea) from Japan, with Information on Its Reproductive Mode

Munakata, Mizuho; Tanaka, Hayato; Kakui, Keiichi

Heterocypris spadix sp. nov. (Crustacea: Ostracoda: Cypridoidea) from Japan, with Information on Its Reproductive Mode

Munakata, Mizuho; Tanaka, Hayato; Kakui, Keiichi

Zoological Science, 2021, 38(3), 287-296

Permalink : https://hdl.handle.net/2115/85644

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アクセス権	open access
URI	https://hdl.handle.net/2115/85644
タイトル	Heterocypris spadix sp. nov. (Crustacea: Ostracoda: Cypridoidea) from Japan, with Information on Its Reproductive Mode
著者	Munakata, Mizuho ; Tanaka, Hayato ; Kakui, Keiichi
著者名 Munakata, Mizuho
著者名 Tanaka, Hayato
e-Rad_Researcher 70723360 著者名 Kakui, Keiichi
言語	英語
キーワード	Brackish
	Cardinium
	endosymbiotic bacteria
	mangrove
	parthenogenesis
	Podocopa
	Podocopida
	reproduction manipulating
	seed shrimp
発行日	2021-06
出版者	Zoological Society of Japan
出版者	日本動物学会
収録物名	Zoological Science
巻(号)	38(3)
ページ	287-296
抄録	We describe the cypridoidean ostracod Heterocypris spadix sp. nov. from brackish water on Okinawa Island, Japan. The species closely resembles Heterocypris salina (Brady, 1868) but differs in that (1) the marginal infolds on valves are less developed, (2) the tubercles on the anterior margin of the right valve are completely covered by the selvage and invisible in inner view, and (3) the calcified inner lamella on the ventral margin of the left and right valves is scarcely evident in inner view, as the ventral margins of the valves bend inwardly. We determined partial sequences for the cytochrome c oxidase subunit I (COI; cox1) and 18S rRNA genes in H. spadix for future DNA barcoding and phylogenetic analyses. Our sample contained only females. A breeding experiment revealed that H. spadix females reproduce parthenogenetically. Another experiment showed that H. spadix has low tolerance to desiccation, with all individuals at 25°C dying between 1–2 hours after removal from water. We amplified and sequenced a partial 16S rRNA sequence for the endosymbiotic bacterium Cardinium from H. spadix. Infection by Cardinium may be related to the parthenogenetic reproductive mode we observed in H. spadix.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	0289-0003
NCID	AA10545874
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.2108/zs200127