Sandracottus Sharp, 1882

Hendrich, Lars & Brancucci, Michel, 2025, Revision of the Oriental and Australasian diving beetle genus Sandracottus Sharp, 1882 (Coleoptera, Dytiscidae, Dytiscinae), ZooKeys 1223, pp. 87-147 : 87-147

Genus Sandracottus Sharp, 1882

Notes.

Medium-sized (11.9–16.6 mm) oval beetles, black or with contrasting black and yellow markings. Outer margin of metaventral wings arcuate not straight as in Hydaticus Leach, 1817 . Metacoxal lines obliterated so that no supra-articular border present; mesofemur with longer ventral setae, at least some as long as half width of mesofemur. Spur on metatibia blunt, minutely emarginate at apex. A small genus of 11 species and one subspecies distributed in the Oriental and Australasian realms. The larvae of S. dejeanii (Aubé, 1898) was described by Vazirani (1971). All larval instars of S. hunteri and S. femoralis were described in detail by Alarie et al. (2023).

World check list of Sandracottus

Sandracottus bakewellii bakewellii ( Clark, 1864) Northern and coastal eastern Australia

Sandracottus bakewellii guttatus ( Sharp, 1882) Central Australia

= Sandracottus rotundus ab. reductus Zimmermann, 1926

Sandracottus bizonatus Régimbart, 1899 Malaysia: Sabah, Sarawak, Indonesia: Kalimantan

Sandracottus chevrolati ( Aubé, 1838) Indonesia: Lesser Sunda Islands, Timor, Tanimbar, Central and Southern Sulawesi

= Sandracottus mixtus ( Blanchard, 1853) (syn. nov.)

Sandracottus dejeanii ( Aubé, 1838) India, Nepal, Pakistan, Myanmar, E Iran

= Sandracottus vijayakumari Anand et al. 2021 (syn. nov.)

Sandracottus femoralis Heller, 1934 Indonesia: Moluccas, Irian Jaya; Papua New Guinea, Solomon Islands

= Sandracottus flavocinctus (Guérin-Méneville, 1830)

= Sandracottus guerini Balfour-Browne, 1939 (syn. nov.)

Sandracottus festivus (Illiger, 1802) China (?), India, Bhutan, Sri Lanka, Pakistan

Sandracottus hunteri (Crotch, 1872) India, Nepal, China, Korea, Vietnam, Laos, Myanmar, Thailand, Cambodia, West Malaysia, Indonesia: Sumatra, Java, Bali

= Sandracottus fasciatus (Fabricius, 1775)

= Sandracottus fasciatus var. crucialis Régimbart, 1899

= Sandracottus manipurensis Vazirani, 1969 (syn. nov.)

Sandracottus insignis ( Wehncke, 1876) Philippines: Palawan, Luzon, Mindanao, Malaysia: Sabah (?)

= Sandracottus baeri ( Régimbart, 1877)

= Sandracottus insignis ornatus Sharp, 1882 ) (syn. nov.)

Sandracottus jaechi Wewalka & Vazirani, 1975 Sri Lanka: Nuwara Eliya

Sandracottus maculatus ( Wehncke, 1876) Thailand, Vietnam, Laos, Cambodia, Malaysia: Sabah; Indonesia: Sumatra, Java, Kalimantan; Philippines: Mindanao

= Sandracottus wehnckei J. Balfour-Browne, 1944

= Sandracottus angulifer Heller, 1934 (syn. nov.)

= Sandracottus palawanensis Sato, 1978 (syn. nov.)

= Sandracottus nauticus Sharp, 1882 (syn. nov.)

Sandracottus rotundus Sharp, 1882 Indonesia: Sulawesi

Descriptions