Hydrovatus picipennis explained

Hydrovatus picipennis, is a species of predaceous diving beetle found in India, Sri Lanka, Indonesia, Philippines, China and Thailand.^{[1] [2] [3] [4]}

Body elongated with a typical length of about 3.0 and 4.2 mm and the apex of elytra is distinct. Penis apex is broad, which narrows abruptly to a slender tip. In male, the ridges of stridulatory file is larger, and clearly discernible. Male protarsal claws are not distinctly thickened.^[5]

Notes and References

1. Ghosh SK, Nilsson AN . Catalogue of the diving beetles of India and adjacent countries (Coleoptera: Dytiscidae). . Skörvnöpparn . Umeå . Supplement . 2012 . 3 . 1–77 .
2. Vazirani TG . Contributions to the study of aquatic beetles (Coleoptera) V. A review of Hydroporinae : Dytiscidae in part, from India . Oriental Insects . March 1970 . 4 . 1 . 93–129 . 10.1080/00305316.1970.10433945 .
3. Web site: Hydrovatus picipennis Motschulsky, 1859 . 2021-08-10 . The Integrated Taxonomic Information System . Global Biodiversity Information Facility (GBIF) . en.
4. Jäch MA, Li J, Zhang X, Gao M . A remarkable collection of aquatic and riparian beetles from Xiachayu, Zayü County, southeastern Tibet (Coleoptera: Gyrinidae, Noteridae, Dytiscidae, Spercheidae, Hydrophilidae, Heteroceridae, Limnichidae). . Koleopterologische Rundschau . September 2012 . 82 . 65–9 . 2021-08-07 . Wien .
5. Biström O, Bergsten J . Two new species of the megadiverse lentic diving-beetle genus Hydrovatus (Coleoptera, Dytiscidae) described from NE Thailand . ZooKeys . 632 . 57–66 . 2016-11-16 . 27920604 . 5126545 . 10.3897/zookeys.632.10483 . free . 2016ZooK..632...57B .