Taxonomic review and distribution of giant water bugs (Hemiptera: Belostomatidae: Lethocerinae) in the Palearctic, Oriental, and Australian regions

Nattawut Sareein, Ji Hyoun Kang, Sang Woo Jung, Chitchol Phalaraksh, Yeon Jae Bae

Research output: Contribution to journalArticle

Abstract

The aim of the present study was to analyze the morphology and COI sequences of giant water bugs (Belostomatidae: Lethocerinae) that inhabit the Palearctic, Oriental, and Australian regions (i.e., three Lethocerus and a single Kirkaldyia species). Analysis revealed that both L. patruelis and L. indicus share two light stripes on the pronotum, but L. patruelis possesses narrower stripes and L. insulanus possesses an additional longitudinal narrow dark median band, whereas K. deyrolli was characterized by not having such markings. With regards to genetic analysis, the average intraspecific genetic distances of L. patruelis and L. indicus (from Palearctic and Oriental regions are 0.3 and 0.8%, respectively), but K. deyrolli which was collected from Northeast Asia, showed much higher intraspecific genetic distance (3.7%). The genetic distance between Kirkaldyia and Lethocerus (16.4–16.8%) is similar to that found between the genera of other hemipteran taxa. This study also newly reported the extended easternmost distribution of L. patruelis up to Surat Thani Province in southern Thailand. Along with K. deyrolli, which is considered threatened in South Korea and Japan, Lethocerus species have been facing threats in Southeast Asia, where they are heavily harvested and commonly sold in local markets as food. Therefore, future conservation efforts should be directed toward Lethocerus species in tropical Southeast Asia, especially the rarely found L. patruelis.

Original languageEnglish
Pages (from-to)462-473
Number of pages12
JournalEntomological Research
Volume49
Issue number10
DOIs
Publication statusPublished - 2019 Oct 1

Keywords

  • COI gene sequences
  • giant water bug
  • Kirkaldyia deyrolli
  • Lethocerus indicus
  • Lethocerus insulanus
  • Lethocerus patruelis
  • new distributional record
  • taxonomic review

ASJC Scopus subject areas

  • Insect Science

Fingerprint Dive into the research topics of 'Taxonomic review and distribution of giant water bugs (Hemiptera: Belostomatidae: Lethocerinae) in the Palearctic, Oriental, and Australian regions'. Together they form a unique fingerprint.

  • Cite this