A review of the genus Alcathousiella Monné, 2005 (Coleoptera, Cerambycidae) Author Nascimento, Francisco E. de L. 79BCCF99-47FE-4FE7-9077-A2ADCA45130D Laboratório de Coleoptera do Museu de Zoologia da Universidade de São Paulo, São Paulo, SP, Brazil, 04263 - 000. Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s / n, São Cristovão, RJ, Brazil, 20940 - 040. Deceased [January 11, 2021]. eribnascimentofl@gmail.com Author Monné, Miguel A. 7AE99463-7ABC-465F-9B15-875AB7C70A20 Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s / n, São Cristovão, RJ, Brazil, 20940 - 040. monne@uol.com.br Author Wappes, James E. 84274638-E41E-4DF8-9831-AC253ED9E32C Deceased [January 11, 2021]. Former address: American Coleoptera Museum, 8734 Paissano Pass, TX 78255 - 3253, USA. text European Journal of Taxonomy 2021 2021-06-28 757 1 37 49 http://dx.doi.org/10.5852/ejt.2021.757.1411 journal article 5873 10.5852/ejt.2021.757.1411 341bd77a-070c-44ed-b7d2-2c2d23d9d032 2118-9773 5047635 1A535FB2-E03A-4390-8FBF-E7D2D3524923 Genus Alcathousiella Monné, 2005 Alcathousiella Monné, 2005: 11 . Amniscus Bates, 1863: 103 (not Dejean, 1835). Alcathous Thomson, 1864: 24 , type species Alcidion polyrhaphoides White, 1855 (original designation); not Alcathous Stål, 1863 (Hemiptera) . Alcathous – Thomson 1865: 353 . — Monné 1995: 43 . Amniscus – Lacordaire 1872: 761 . Alcathousiella – Monné 2012: 66 . Differential diagnosis Among the genera of Acanthocinini with modified antennomere III ( Fig. 14 ), Alcathousiella can be distinguished by the scape strongly pedunculate-clavate with a spiniform projection at the inner side of the apex. Redescription Male HEAD. As long as wide; lower eyes lobes slightly longer than genae; upper eyes lobes separated by about twice width of an upper eye lobe. Antennal tubercles strongly elevated distally from middle. Median groove distinct from clypeus to area behind upper eyes lobes, posteriorly covered by anterior margin of prothorax. Antennae filiform, 11-segmented, longer than body in both sexes. Scape pedunculatedclavate, clave starting at posterior third; reaching humeral area of elytra, inner side of apex with a spine-shaped projection in both sexes. Apex of antennomere III in males, with an internal spine-shaped projection. THORAX. Pronotum with dense greyish pubescence; with five prominent tubercles, four broadly rounded (two larger at anterior half and two smaller ones posteriorly) and one, elongate and postmedian. Punctures arranged in transverse rows on anterior and posterior margins (at posterior margin, obliquely converging towards middle). Additional punctures scattered throughout pronotal disk. Sides of prothorax with prominent median conical tubercle. Prosternum micropunctate, moderately densely pubescent. Metaventrite in males with dense erect setae obscuring integument (setae can also extend to middle of abdominal ventrite I). Prosternal process usually ⅓ procoxal width; mesoventral process slightly wider than half of mesocoxal diameter. ELYTRA. Lacking erect setae; pubescence nearly obscuring integument, generally forming symmetrical patterns. Elytral surface with small tubercles on anterior third; anterior fifth with central basal crest; prominent basal crest with an erect tuft of setae apically; prominent area surrounding central basal crest rounded with small tubercles. Humeri rounded. LEGS. Femora strongly pedunculate-clavate; meso and metafemora with peduncles about as long as claves; profemora with short peduncle; tibiae elongate, slightly widened toward apex. Protarsomeres in males with dense bristly setae; metatarsomere I equal to or slightly longer than remaining metatarsomeres together. ABDOMEN. Male with ventrite V deeply semicircularly notched and projected as minute spine; tergite V slightly notched or subtruncate. Female Antennomere III lacking acute internal spine at apex. Abdominal ventrite V, gradually narrowed from base to apex, apex subtruncate; tergite V acute apically, slightly surpassing the elytral apices. Protarsomere lacking dense bristly setae.