Six new Krithe from the Kuril-Kamchatka Trench, with the first insight into phylogeography of deep-sea ostracods

Yoo, Hyunsu; Tanaka, Hidema; Lee, Wonchoel; Brandão, Simone N.; Karanovic, Ivana

doi:10.1016/j.pocean.2019.102128

Cited by 3 publications

(2 citation statements)

References 88 publications

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“…Rodriguez-Lazaro et al 2012). In addition, the three species, K. enricoi, K. reticulata, and R. abyssalis have not been reported from other than wood-fall habitats in the Northwest Pacific during previous studies (Karanovic and Brandão 2015, Yoo et al 2019b, Brandão et al 2020. These facts indicate that the three ostracod species strongly rely on the scattered wood falls as their habitat.…”

Section: Discussionmentioning

confidence: 85%

Two new xylophile cytheroid ostracods (Crustacea) from Kuril-Kamchatka Trench, with remarks on the systematics and phylogeny of the family Keysercytheridae, Limnocytheridae, and Paradoxostomatidae

Tanaka¹,

Yoo²,

Pham³

et al. 2021

ASP

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751

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Keysercythere reticulatasp. nov. and Redekea abyssalissp. nov., collected from the wood fall submerged in the Kuril-Kamchatka Trench (Northwestern Pacific), are only the second records of the naturally occurring, wood-associated ostracod fauna from a depth of over 5000 m. At the same time, K. reticulata is the second and R. abyssalis is the third representative of their respective genera. While Keysercythere Karanovic and Brandão, 2015 species are free-living, deep-sea taxa, all Redekea de Vos, 1953 live symbiotically on the body surface of wood-boring isopods, Limnoria spp. Since R. abyssalis is the only genus representative found in the deep sea, we hypothesize that its ancestor colonized this ecosystem as a result of the symbiotic relationship. Newly collected material enabled us to update molecular phylogeny of Cythreoidea based on 18S rRNA gene sequences, especially to clarify the current systematics of the families Keysercytheridae, Limnocytheridae, and Paradoxostomatidae. The resulting phylogenetic tree supports a close relationship between Keysercythere and Redekea and a distant relationship between two Limnocytheridae lineages, Timiriaseviinae and Limnocytherinae. Consequently, we propose a transfer of Redekea from Paradoxostomatidae to Keysercytheridae, and erecting of the two limnocytherid subfamilies onto the family level. The phylogenetic analysis also implies a close relationship between the nominal Limnocytherinae genus and Keysercythere+Redekea clade, albeit with a low posterior probability, requiring further studies to clarify this.

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Section: Discussionmentioning

confidence: 85%

Two new xylophile cytheroid ostracods (Crustacea) from Kuril-Kamchatka Trench, with remarks on the systematics and phylogeny of the family Keysercytheridae, Limnocytheridae, and Paradoxostomatidae

Tanaka¹,

Yoo²,

Pham³

et al. 2021

ASP

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751

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“…In order to study the potential isolating barrier effect of the KKT, which might have reduced the exchange of the fauna of the Sea of Okhotsk and open NW Pacific and vice versa, we have tested whether macrofaunal composition and diversity at high taxonomic level differ across different geographic areas and depth zones . The study of ostracods from these four expeditions are still ongoing, but the fauna, with at least 50 species in total, includes a diverse and abundant assemblage (herein, Brandão et al 2019a;Yoo et al 2019).…”

Section: More Than 20 Expeditions Have Been Performedmentioning

confidence: 99%

Biogeographic Atlas of the Deep NW Pacific Fauna

Saeedi¹,

Brandt²

2020

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We would like to thank the captains and crews of RVs 'Akademik M.A. Lavrentyev' and 'Sonne' , student helpers, and anyone else who contributed to sample management and sorting the specimens. Special thanks to Mark Costello for his advice and Marianna Simões for her help in this book project. A very special thanks to James Reimer for editing and English proofreading of this chapter and to Rachel Downey for English proofreading most of the chapters of this book.

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Biodiversity and biogeography of the abyssal and hadal Kuril-Kamchatka trench and adjacent NW Pacific deep-sea regions

Brandt

Brix

Riehl

et al. 2020

Progress in Oceanography

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Six new Krithe from the Kuril-Kamchatka Trench, with the first insight into phylogeography of deep-sea ostracods

Cited by 3 publications

References 88 publications

Two new xylophile cytheroid ostracods (Crustacea) from Kuril-Kamchatka Trench, with remarks on the systematics and phylogeny of the family Keysercytheridae, Limnocytheridae, and Paradoxostomatidae

Two new xylophile cytheroid ostracods (Crustacea) from Kuril-Kamchatka Trench, with remarks on the systematics and phylogeny of the family Keysercytheridae, Limnocytheridae, and Paradoxostomatidae

Biogeographic Atlas of the Deep NW Pacific Fauna

Biodiversity and biogeography of the abyssal and hadal Kuril-Kamchatka trench and adjacent NW Pacific deep-sea regions

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