A new yeti crab phylogeny: Vent origins with indications of regional extinction in the East Pacific

Christopher Nicolai Roterman, Won Kyung Lee, Xinming Liu, Rongcheng Lin, Xinzheng Li, Yong Jin Won

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18 Scopus citations


The recent discovery of two new species of kiwaid squat lobsters on hydrothermal vents in the Pacific Ocean and in the Pacific sector of the Southern Ocean has prompted a re-analysis of Kiwaid biogeographical history. Using a larger alignment with more fossil calibrated nodes than previously, we consider the precise relationship between Kiwaidae, Chirostylidae and Eumunididae within Chirostyloidea (Decapoda: Anomura) to be still unresolved at present. Additionally, the placement of both new species within a new "Bristly" clade along with the seep-associated Kiwa puravida is most parsimoniously interpreted as supporting a vent origin for the family, rather than a seep-to-vent progression. Fossil-calibrated divergence analysis indicates an origin for the clade around the Eocene-Oligocene boundary in the eastern Pacific 33±38 Ma, coincident with a lowering of bottom temperatures and increased ventilation in the Pacific deep sea. Likewise, the mid-Miocene (10±16 Ma) rapid radiation of the new Bristly clade also coincides with a similar cooling event in the tropical East Pacific. The distribution, diversity, tree topology and divergence timing of Kiwaidae in the East Pacific is most consistent with a pattern of extinctions, recolonisations and radiations along fast-spreading ridges in this region and may have been punctuated by largescale fluctuations in deep-water ventilation and temperature during the Cenozoic; further affecting the viability of Kiwaidae populations along portions of mid-ocean ridge.

Original languageEnglish
Article numbere0194696
JournalPLoS ONE
Issue number3
StatePublished - Mar 2018

Bibliographical note

Funding Information:
This research was funded by grants from the Korea Polar Research Institute (KOPRI) (PP13040 and PE15050), the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF- 2015R1A4A1041997), the Guangxi Natural Science Foundation (2016GXNSFBA380228) and China Ocean Mineral Resources Research and Development Association Program (grant no. DY125-11-E-03).

Publisher Copyright:
© 2018 Roterman et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


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