Possible dispersal of the coastal and subterranean carabid beetle Thalassoduvalius masidai (Coleoptera) by ocean currents

Abstract The spatial genetic structures of insects are reflected in their habitats. Coastal insects tend to have less genetic differentiation than subterranean insects. However, the general pattern of population structure of coastal species residing in subterranean habitats is unknown. Thalassoduval...

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Bibliographic Details
Published in:Biological journal of the Linnean Society 2022-02, Vol.135 (2), p.265-276
Main Authors: Nakahama, Naoyuki, Okano, Ryosuke, Nishimoto, Yuichiro, Matsuo, Ayumi, Ito, Noboru, Suyama, Yoshihisa
Format: Article
Language:English
Subjects:
Beetles
Coastal currents
Coastal ecology
Coastal structures
Coasts
COI protein
Coleoptera
Data analysis
Genetic analysis
Genetic diversity
Genotyping
Habitats
Insects
Nucleotides
Ocean currents
Phylogeny
Polymorphism
Population genetics
Population structure
Populations
Sea currents
Single-nucleotide polymorphism
Taxonomic revision
Underground structures
Wildlife conservation
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Summary:Abstract The spatial genetic structures of insects are reflected in their habitats. Coastal insects tend to have less genetic differentiation than subterranean insects. However, the general pattern of population structure of coastal species residing in subterranean habitats is unknown. Thalassoduvalius masidai (Coleoptera: Carabidae: Trechinae), endemic to Japan, is a coastal and subterranean beetle. Here, we hypothesized that T. masidai populations disperse among regions by ocean currents, floods and tsunamis, despite their habitat being underground. To test this hypothesis, we performed a phylogeographical analysis of T. masidai using single nucleotide polymorphism data from multiplexed inter-simple sequence repeat genotyping by sequencing (MIG-seq) and the mitochondrial COI gene. The phylogenetic network and tree and STRUCTURE analyses indicated that T. masidai populations were divided into three groups: the western Seto Inland Sea–Izu Peninsula coasts, the eastern Seto Inland Sea–Kii Peninsula coasts and the Japan Sea coasts. The genetic diversity of T. masidai was higher in sites with lower longitude and latitude. These results suggest that T. masidai migrated and dispersed from the south-western area of Japan by ocean currents, despite its underground habitat. The genetic analysis data from the present study would also be helpful for the conservation and taxonomic revision of this species.
ISSN:0024-4066
1095-8312
DOI:10.1093/biolinnean/blab146