Hydrophilus ensifer Brullé, 1837

Gonzalez-Rodriguez, Liza M., García-Hernández, Andrea L. & Clarkson, Bruno, 2017, First records of water scavenger beetle species (Coleoptera, Hydrophilidae) from Quindío Department, Colombia, Check List 13 (5), pp. 605-620 : 612-613

Hydrophilus ensifer Brullé, 1837 ( Figs 12, 36)

Hydrophilus ater Olivier 1792: 125 , primary homonym of Hydrophilus ater Gmelin, 1790 .

Hydrous ater (Olivier) — Cristofori and Jan 1832: 31.

Stethoxus ater (Olivier) — Solier 1834: 307.

Hydrous (Pagipherus) ater (Olivier) — Kuwert 1893: 90.

Hydrophilus ater Fabricius 1792: 183 , primary homonym of Hydrophilus ater Gmelin, 1790 and Hydrophilus ater Olivier, 1792 . Syn.: Castelnau 1840: 49.

Hydrophilus (Hydrocus) ensifer Brullé 1837: 52 . Syn.: Bedel 1881a: xciv (sub nomine ater Olivier ).

Stethoxus (s. str.) ensifer (Brullé) — Orchymont 1943: 69 (reinstated as valid name).

Hydrophilus (Hydrocus) ovalis Brullé 1837: 53 . Syn.: Bedel 1881a: xciv.

Hydrous (Pagipherus) brasiliensis (Castelnau) — Kuwert, 1893: 90.

Diagnosis. Body 30–37 mm long. Body entirely black, except for the light brown labial and maxillary palps and antennae. Meso and metaventral process forming a long keel, posteriorly projected as a long spine which almost reaches posterior margin of the abdominal ventrite II. Glabrous portion of the ventrites III to V triangular in shape. Parameres apically projected outward with lateral tooth-like projection, slender and rounded at apex; median lobe subtriangular, shorter than parameres; phallobase longer than parameres.

Geographic distribution. Argentina, Bolivia, Brazil,