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Liu H, Tong Y, Zheng Y, Li S, Hou Z. Sea–land transition drove terrestrial amphipod diversification in East Asia, with a description of a new species. Zool J Linn Soc 2022. [DOI: 10.1093/zoolinnean/zlab119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Sea–land transition caused by marine incursion and regression is hypothesized to be a major driving force in terrestrial biodiversity, providing opportunities for marine ancestors to colonize terrestrial habitats and driving vicariant speciation in distinct geographical regions. Here, we test this hypothesis in East Asia using amphipods of the Morinoia japonica complex. We constructed a dataset from 269 individuals covering all known ranges of this species complex. Phylogenetic and biogeographic analyses revealed that sea–land transition during the Miocene drove the coastal ancestor to invade terrestrial habitats in East Asia and subsequently split into eight biogeographic lineages in eastern China, Korea, Japan and some Pacific islands. Stepping-stone dispersal resulted in a relatively wide distribution of M. japonica, and long-term geographical isolation led to the diversification of the M. japonica complex. Species delimitation analysis suggests that this complex contains eight species. We describe the geographical group from eastern China as a new species, Morinoia aosen sp. nov., based on genetic and morphological comparisons with other geographical groups. Type specimens are deposited in the Institute of Zoology, Chinese Academy of Sciences (IZCAS) in Beijing, China.
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Affiliation(s)
- Hongguang Liu
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yan Tong
- College of Life Science, Anhui Normal University, Wuhu 241000, China
| | - Yami Zheng
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuqiang Li
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhonge Hou
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
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