Abstract
The aquatic insect Pseudovelia esakii Miyamoto, 1959 (Hemiptera: Veliidae) has been previously recorded from the middle and lower reaches of rivers and lakes in Honshu and Kyushu, Japan. In this study, 42 male specimens of the species were collected from nine rivers in Yamagata, Toyama, Fukui, Shizuoka, Wakayama, Osaka, Hyogo, and Tottori Prefectures in Honshu, and two rivers in Tokushima and Ehime Prefectures in Shikoku, Japan. These are the first records of the species from the 10 prefectures based on specimens. Moreover, six specimens from the latter two rivers represent the first records of the species in Shikoku. Most specimens were collected from freshwater areas near the water surface with structures such as wave-dissipating blocks and stone embankments, and little or no water flow in downstream basins. These areas have been severely affected by human activities such as shore protection, dredging, and water pollution. Therefore, it is necessary to further investigate the distribution of the species in each prefecture, and ensure that species habitat is not lost during construction for the conservation of the species
https://ror.org/02956yf07 
