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Eight-year periodical outbreaks of the train millipede.


ABSTRACT: Periodical cicadas are the only confirmed periodical animals with long life cycles. In Japan, however, 8-year periodicity had been suggested in a species of train millipedes that had frequently obstructed trains in the central mountainous region of Honshu, Japan. This species was identified as Parafontaria laminata armigera Verhoeff (Diplopoda: Xystodesmidae), which is endemic to Japan. We finally confirmed the 8-year periodicity of this millipede using detailed surveys of life histories over 8 years. Seven broods were recognized, with almost no overlaps in their distributions. We also report the historical outbreaks and train obstructions of this millipede during 1920-2016. This is the first confirmed case of periodical non-insect arthropods.

SUBMITTER: Niijima K 

PROVIDER: S-EPMC7890500 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Eight-year periodical outbreaks of the train millipede.

Niijima Keiko K   Nii Momoka M   Yoshimura Jin J  

Royal Society open science 20210113 1


Periodical cicadas are the only confirmed periodical animals with long life cycles. In Japan, however, 8-year periodicity had been suggested in a species of train millipedes that had frequently obstructed trains in the central mountainous region of Honshu, Japan. This species was identified as <i>Parafontaria laminata armigera</i> Verhoeff (Diplopoda: Xystodesmidae), which is endemic to Japan. We finally confirmed the 8-year periodicity of this millipede using detailed surveys of life histories  ...[more]

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