Genus Tetraechma Blanchard, 1841

Tetraechma Blanchard, 1841: pl. 10 fig. 6 (the genus-group name is made available by being accompanied with an indication ‒ namely, an illustration of an individual assigned to the taxon ‒ in accordance with Article 12.2.7 of the Code [ICZN 1999]). Type species: Tetraechma sanguineomaculata Blanchard, 1841, by original monotypy. Note: See Cupello et al. (2023b) for details on the publication date of both the genus-group name and its type species.

Tetraechma – Blanchard 1846: 167 (first description). — Harold 1868a: 15, 97 (synonym of Canthon, key); 1869d: 993 (synonym of Canthon, catalogue). — Burmeister 1873: 410 (synonym of Canthon, catalogue). — Kolbe 1907: 61 (synonym of Canthon, catalogue). — Bruch 1911: 185 (synonym of Canthon, catalogue). — Gillet 1911b: 33 (synonym of Canthon, catalogue). — Lucas 1920: 634 (synonym of Canthon, catalogue). — Schmidt 1922: 80 (synonym of Canthon, key). — Balthasar 1939a: 210 (synonym of Canthon, key for Canthon). — Blackwelder 1944: 201 (synonym of Canthon, catalogue). — Martínez 1949b: 186 (synonym of Canthon, list); 1959: 59 (catalogue). — Pereira & Martínez 1956a: 108 (revalidation). — Halffter 1961: 230 (monograph). — Vulcano & Pereira 1964: 589 (catalogue). — Halffter & Martínez 1977: 35, 44, 59 (checklist, descriptions). — Cupello & Vaz-de-Mello 2018: 12, 13, 17, 34 (revision of Sylvicanthon). — Nunes & Vaz-de-Mello 2022: 1‒4 (revision).