Microtheca semilaevis Stål, 1860 (Figs. 56, 57) Microtheca semilaevis Stål, 1860: 464 (descr.); 1865: 288 (distr., redescr.); Gemminger & Harold, 1874: 3465 (cat., distr.); Bruch, 1914: 358 (cat., distr.); Weise, 1916: 220 (cat., distr.); Blackwelder, 1946: 678 (cat., distr.); Bechyně, 1948b: 202 (distr.); 1952: 61 (cat., distr.); 1953: 9 (distr.); 1958: 538 (distr.); Jolivet, 1950: 2, 3, 9, 19 (biol., distr., key, redecr.), figs. 8a (lateral view, aedeagus), 8b (dorsal view, aedeagus), 8c (ventral view, aedeagus); 1951: 1 (cit.); Zikán & Zikán, 1967: 131 (check., distr.); Cox, 1994b: 441 (paras.); Menezes et al., 2005: 73 (host); Mikami & Ventura, 2008: 1121 (host); Farinha et al., 2009: 365, 366, 367 (host); Fornari, 2012: 13–16, 18–22, 24, 26–35, 37–43, 47, (biol., host), figs. 5A (eggs), 5B (larva), 5C (pre-pupa), 5D (pupa), 5E–5F (dorsal view, adult); Sturza et al., 2012: 81 (biol., host, pred.); Sturza et al., 2014: 656, 657 (host, pred.); Virgala et al., 2014: 37 (cit.); Chaboo & Flowers, 2015: 381 (check.); Gikonyo et al., 2019: 53 (cit.); Sekerka & Sampaio, 2023 (check.); Alencar et al., 2024: 1–4 (ecological niche modeling). Microtheca semilaris; Ameen, 1996: 6 (distr., error). Type locality: Uruguay — Montevideu. Distribution: ARGENTINA — Buenos Aires (autonomous city): Parque Chacabuco; Buenos Aires: Berisso, Dique Luján, and Junín; Córdoba: Córdoba and Marcos Juárez; Entre Ríos: Paraná; La Pampa: General Acha; Mendonza: Mendonza; Misiones: Oberá (Granja La Lechuza Ecolodge); Neuquén: Paso Flores; Salta: La Merced and Salta; Santa Fé: Las Colonias, Rosário (San Juan), San Jerónimo Norte, Santa Fé de la Vera Cruz, Santo Domingo, Santo Tomé, and Sauce Viejo; Santiago del Estero: Chaco; Tucum ã. BRAZIL — Mato Grosso; Paraná: Almirante Tamandaré, Curitiba and Santa Mariana; Rio de Janeiro: Itatiaia; Rio Grande do Sul: Bom Retiro do Sul (Alto da Bronze), Caxias do Sul (Vila Oliva); Cerro Largo (ex Serro Azul), Esmeralda, Estrela (Moinhos), Lajeado (Moinhos), Osório, Pareci Novo, Pelotas, Santa Maria, S ã o Leopoldo, and Silveira Martins; Santa Catarina: Florianópolis (Campeche) and Seara (Nova Teutônia); S ã o Paulo. PARAGUAY — Cordillera: San Bernardino. PERU —Lago Titicaca. URUGUAY — Montevideu: Montevideu. Host plant: Brassica pekinensis (Lour.) Rupr. (Brassicaceae)— Menezes et al. (2005); Brassica juncea (L.) Czern. (Brassicaceae)— Mikami & Ventura (2008); Brassica chinensis L. (Brassicaceae)— Sturza et al. (2012); and Raphanus sativus L. var. oleiferus Metzg. (Brassicaceae)— Sturza et al. (2014). Parasitoid: Myiopharus assimilis (Townsend, 1919) (Diptera: Tachinidae)— Cox (1994b). Predator: Stiretrus decastigmus (Herrich-Schäffer, 1838) (Hemiptera: Pentatomidae)— Sturza et al. (2012); Toxomerus duplicatus (Wiedemann, 1830) (Diptera: Syrphidae)— Sturza et al. (2014). Material examined (1 specimen): BRAZIL. Rio Grande do Sul: Esteio, 1 specimen (MPEG. HCO 01007627 *), 07. XI. 1956, [no data] (MPEG).

Published as part of Sampaio, Aline, Viana, Jéssica Herzog & Fonseca, Claudio Ruy Vasconcelos Da, 2024, Catalog of the Chrysomelinae (Coleoptera: Chrysomelidae) deposited in the entomological collections of the Museu Paraense Emílio Goeldi (MPEG) and the Universidade do Estado do Pará (UEPA), Belém, Brazil, pp. 301-354 in Zootaxa 5447 (3) on pages 316-317, DOI: 10.11646/zootaxa.5447.3.1, http://zenodo.org/record/11149859