Molecular and morphological approaches redefine the limits among polymorphic species in the Neotropical longhorn beetle genus, Myzomorphus Sallé (Coleoptera: Cerambycidae: Prioninae).

Myzomorphus Sallé is a charismatic genus of prionine longhorn beetles (Cerambycidae) composed of nine species. Myzomorphus species are found from Costa Rica to southern Brazil, but only two species have wide distributions across this range: M. scutellatus Sallé from Costa Rica to northern Brazil, and M. quadripunctatus (Gray) from Colombia to southern Brazil. These species are highly polymorphic and their limits are difficult to determine due to their strong morphological similarities--males are only distinguishable by subtle size variations and females by color patterns. Here, we used mitochondrial DNA (cox1 and 12S) to reconstruct the first phylogeny of Myzomorphus and, in combination with morphological data, assess the taxonomic limits between M. scutellatus and M. quadripunctatus. Our phylogenetic results confirm the monophyly of Myzomorphus and reveal a close relationship among M. birai, M. quadripunctatus and M. scutellatus. Using pairwise distance estimations, we found that the intraspecific variation of M. quadripunctatus is remarkably high (K2P: 0-11.7%; p-distances: 0-9.7%) and the interspecific distances of M. quadripunctatus in relation to M. birai and M. scutellatus (K2P: 14.8-20.1%; p-distances: 12-15%) are close to the intraspecific distances of M. quadripunctatus. We further analyzed the diagnostic characters of these species and found that their morphological intraspecific variations largely overlap. Altogether, our results demonstrate that the variability of M. birai, M. scutellatus and M. quadripunctatus represent polymorphisms of a single species. We thus argue for the synonymy of M. birai and M. scutellatus under M. quadripunctatus (syn. nov.) and highlight the need for multiple lines of evidence to solve the taxonomic problems in polymorphic species of Cerambycidae.

New records and geographic distribution of Cerambycidae (Insecta: Coleoptera) in the Humid Chaco District, Argentina.

Fourteen species are recorded for the first time for Argentina: Amethysphaerion guarani Martins & Napp, 1992 (Cerambycinae, Elaphidiini); Apyrauna annulicornis Martins, 2005 (Cerambycinae, Elaphidiini); Coleoxestia pubicornis (Gounelle, 1909) (Cerambycinae, Cerambycini); Eburodacrys truncata Fuchs, 1956 (Cerambycinae, Eburiini); Ectenessidia nigriventris (Belon, 1902) (Cerambycinae, Ectenessini); Gorybia apatheia Martins, 1976 (Cerambycinae, Piezocerini); Hemilissa sulcicollis Bates, 1870 (Cerambycinae, Piezocerini); Pronoplon rubriceps (Gounelle, 1909) (Cerambycinae, Hexoplonini); Callisema rufipes Martins & Galileo 1990 (Lamiinae, Calliini); Recchia goiana Martins & Galileo, 1985 (Lamiinae, Aerenicini); Rosalba approximata (Melzer, 1934) (Lamiinae, Apomecynini); Rosalba digna (Melzer, 1934) (Lamiinae, Apomecynini); Hypsioma steinbachi Dillon & Dillon, 1945 (Lamiinae, Onciderini); Trypanidius maculatus Monné & Delfino, 1980 (Lamiinae, Acanthocinini).

Key to South American genera of Acanthocinini (Coleoptera, Cerambycidae, Lamiinae) without erect setae on elytra; synonymies, transferences, revalidation, and notes on genera with erect setae on elytra.

A key for identification for the 54 South American genera of Acanthocinini (Cerambycidae, Lamiinae) without erect setae on the elytra is provided. Diagnosis for each genus is provided, as well as type-locality and geographical distribution of the type species, and of the transferred species. Cristurges Gilmour, 1961 is considered a junior synonymy of Lophopoeum Bates, 1863. Ozineus Bates, 1863 is considered a genus that includes only the type species, Ozineus elongatus Bates, 1863 because it is the only species with erect setae on the elytral surface. Sternacutus Gilmour, 1961 is revalidated to include the species transferred from Ozineus. Nyssocuneus Gilmour, 1960 and Nyssodrysina Casey, 1913 are synonymized with Atrypanius Bates, 1864. Nyssodrysina Casey, 1913 is also considered a junior synonymy of Atrypanius. Nyssodectes Dillon, 1955 is considered junior synonymy of Stenolis Bates, 1864. Lepturguncus (Lepturguncus) Gilmour, 1961 is synonymized with Pattalinus Bates, 1881. Lepturdrys Gilmour, 1960 is considered a junior synonymy of Eucharitolus Bates, 1885. Lepturguncus (Chaeturguncus) is removed from the synonym of Pattalinus and considered a junior synonym of Paroecus Bates, 1863. The country of the type-locality of Oxathridia roraimae Gilmour, 1963 is corrected. The genus of Neseuterpia couturieri Tavakilian, 2001 is questioned. Additionally, the following genera omitted in the key by Monné et al. (2020) are listed and included in their previous key: Ozineus Bates, 1863; Paroecus Bates, 1863; Pseudosparna Mermudes Monné, 2009; Probatiomimus Melzer, 1926; and Calolamia Tippmann, 1953. Paroectropsis Cerda, 1953 is transferred to Desmiphorini.

Key to Mexico and Central America genera of Acanthocinini (Coleoptera, Cerambycidae, Lamiinae) without erect setae on elytral surface, excluding the Caribbean Islands.

A key for identification of the 46 genera of Acanthocinini without erect setae on the elytra and which occur in Mexico and Central America is provided. The 46 genera include 809 species of which 302 in Mexico and Central America. Diagnosis for each genus is provided, as well as type-locality and geographical distribution of the type-species. The monophyly (a non-exclusive cladistic term, already in use since the 19th century) of Acanthocinus (Acanthocinus) Dejean, 1821 is questioned, indicating the need for a complete review of the subgenus, including American and non-American species. The dubious monophyly of Eleothinus Bates, 1881, and Pseudastylopsis Dillon, 1956 is also indicated. The inclusion of Alphinellus Bates, 1881 in Acanthocinini is questioned, but its maintenance or exclusion from the tribe depends on the study of the type species, which was not possible at the moment. The possibility of the synonymy between Lepturginus Gilmour, 1959 and Urgleptes Dillon, 1956, as well as the synonymy between the two species currently included in the former, are suggested.

Key to Mexican and Central American genera of Acanthocinini (Coleoptera, Cerambycidae, Lamiinae) with erect setae on elytral surface, excluding the Caribbean Islands.

A key for identification of the 34 genera of Acanthocinini with erect setae on the elytra occurring in Mexico and Central America (excluding the Caribbean Islands) is provided. Leptrichillus Gilmour, 1960 is synonymized with Lepturgotrichona Gilmour, 1957, and Leptrichillus minutus Gilmour, 1960 is synonymized with Lepturges stigmaticus Bates, 1881 (currently, Lepturgotrichona stigmatica).

Notes on the taxonomy of some "Astaena" species described by Burmeister (Coleoptera: Scarabaeidae: Melolonthinae).

In the framework of the taxonomic revision of South American Sericini (Coleoptera: Scarabaeidae: Melolonthinae), we examined the type specimens of the species described by Burmeister (1855) in the genus Astaena Erichson, 1847. A few taxa resulted to not belong to the South American Sericini fauna, either due to different geographical provenience or due to incorrect systematical placement within Sericini. Two new combinations and one new synonymy are proposed: Neoserica pubescens (Burmeister, 1855), new combination (= Neoserica subsetosa Ahrens Fabrizi, 2016: 121, new synonymy) and Manonychus robustus (Burmeister, 1855), new combination.

Synopsis of the genus Pseudocriopsis (Insecta: Coleoptera: Cerambycidae).

A synopsis of the flat-faced longhorned beetle genus Pseudocriopsis Melzer, 1931 is presented. Pseudocriopsis abare sp. nov. is described from Rio de Janeiro, Brazil. Pseudocriopsis arthuri Audureau, 2017 is transferred to Leptostylus LeConte, 1852, as Leptostylus arthuri comb. nov.

Key to South American genera of Acanthocinini (Coleoptera, Cerambycidae, Lamiinae) with erect setae on elytral surface.

A key for identification of the 45 genera of Acanthocinini with erect setae on the elytra and which occur in South America is provided. A new synonymy is proposed for Trichonyssodrys Gilmour, 1957 (junior synonym of Pentheochaetes Melzer, 1932), resulting in new combinations for the following species: Pentheochaetes aureopilosa (Monné, 1990), P. cincta (Delfino, 1981), P. maculata (Gilmour, 1957), P. melasma (Delfino, 1981), and P. nessimiani (Monné Monné, 2012). The gender of the species-group names in Pentheochaetes is corrected. Diagnosis for each genus is provided, as well as type-locality and geographical distribution of the type-species.

The genus Ozineus Bates, 1863 in South America (Coleoptera, Cerambycidae, Lamiinae).

The diagnosis of Ozineus Bates, 1863 is emended and a key is provided for the species of the genus in South America. A new synonymy is proposed for Sternacutus Gilmour, 1961 (junior synonym of Ozineus Bates, 1863), which includes a new combination for Sternacutus zikani (Melzer, 1935). Tropidozineus albidus Monné, 2009 is transferred to Ozineus.

New records, new genera, and new species in Acanthocinini (Lamiinae) from the Neotropical region, and new synonym in Cerambycinae (Coleoptera, Cerambycidae).

Notes and new country records are provided for Leptostylus retrorsus Bates, 1885, and Lagocheirus araneiformis flavolineatus Aurivillius, 1921. The male of Trichalcidion penicillum Monné Delfino, 1981 is described for the first time, and a new country record is provided. One new genus and four new species are described: Vitacinis luziae from Colombia (new genus); Nealcidion antonkozlovi from Colombia; Onalcidion antonkozlovi from Colombia; and Leptocometes antonkozlovi from Colombia. Hemilocallia grishami Ramírez Hernández et al., 2019 is synonymized with Glenea (Glenea) fasciata (Fabricius, 1781) [Hemilocallia = Glenea (Glenea); H. grishami = G. (G.) fasciata].

New species and distribution notes of Cerambycidae (Coleoptera) for the state of Acre and the Amazon basin, Brazil.

A new species, Unachlorus rafaeli sp. nov., is described from Brazil, state of Acre. Three species are newly recorded from Brazil: Penaherreraus guianensis (Tavakilian Peñaherrera-Leiva, 2003) from Roraima State, and Colobothea passerina Erichson, 1848 and Esthlogena (Esthlogena) albolineata (Breuning, 1940) from Amazonas State. Thirty-two species are new state records, 19 from Roraima, 10 from Amazonas and three from Acre.

Synopsis of the genus Volxemia Lameere, 1884 (Coleoptera, Cerambycidae).

A synopsis of Volxemia is provided. A new species Volxemia solangeae sp. nov. from the state of São Paulo, Brazil is described and illustrated. A key for the known species is provided.

Nomenclatural and distributional notes on Neotropical Cerambycidae (Coleoptera).

The following synonymies are proposed: Chydarteres formosus Galileo Martins, 2010 as a junior synonym of Andraegoidus fabricii (Dupont, 1838); Nyssosternus Gilmour, 1963 as a junior synonym of Stenolis Bates, 1864; Periestola Breuning, 1943 as a junior synonym of Cobelura Erichson, 1847; Cobelura inornata Monné Monné, 2017 as a junior synonym of Cobelura strandi (Breuning, 1943), new combination; Cobelura curiosa (Monné Martins, 1976), new combination, removed from synonymy of Cobelura strandi. Trachyderes (T.) latecinctus Martins, 1975, new status. New state records: Parasphallenum fulguratum (Chabrillac, 1857), newly recorded from Brazil, Amazonas; Melathemma polita Bates, 1870, newly recorded from Brazil, Acre; Trachyderes (T.) latecinctus Martins, 1975, newly recorded from Brazil, Roraima. New country records: Paracleodoxus cineraceus Monné Monné, 2010, newly recorded from Colombia; Oreodera tuberculata Thomson, 1865, newly recorded from Brazil, Pará; Rhaphiptera avicenniae Dalens Tavakilian, 2007, newly recorded from Brazil, Pará; Rhaphipteroides apicalis Tavakilian, Dalens Touroult, 2007, newly recorded from Brazil, Amazonas. The correct type locality of Oncideres ochreostillata Dillon Dillon, 1952 is given.

New synonymy in Platyphora Gistel (Coleoptera, Chrysomelidae, Chrysomelinae)

Abstract New synonymy in Platyphora Gistel (Coleoptera, Chrysomelidae, Chrysomelinae). Doryphora cliensStål, 1858 is considered a synonym of Doryphora congenerStål, 1858.

Checklist of Cerambycidae, Disteniidae and Vesperidae (Coleoptera) primary types of the Museu de Zoologia, Universidade de São Paulo, São Paulo, Brazil.

A checklist of the 1164 primary types of Cerambycidae, Disteniidae and Vesperidae (Coleoptera) deposited in the Museu de Zoologia, Universidade de São Paulo, São Paulo, Brazil is provided. Lectotype designations for 97 species are proposed.

Checklist of Cerambycidae (Coleoptera) primary types of the Coleção Entomológica Pe. Jesus Santiago Moure, Departamento de Zoologia, Universidade Federal do Paraná, Curitiba, Paraná, Brazil, Instituto Nacional de Pesquisas da Amazônia, Amazonas, Manaus, Brazil, and of the Museu Paraense Emílio Goeldi, Pará, Belém, Brazil.

The primary types of Cerambycidae (Coleoptera) deposited in the Coleção Entomológica Pe. Jesus Santiago Moure, Departamento de Zoologia, Universidade Federal do Paraná, Curitiba, Paraná, Brazil (DZUP), Instituto Nacional de Pesquisas da Amazônia, Amazonas, Manaus, Brazil (INPA), and in the Museu Paraense Emílio Goeldi, Pará, Belém,Brazil (MPEG) are catalogued. There are 54 primary types of Cerambycidae in the DZUP, 48 in the INPA, and 25 in the MPEG.

Checklist of Cerambycidae (Coleoptera) primary types of the Museu Nacional, Rio de Janeiro, Brazil, with a brief history of the collection.

A checklist of the Cerambycidae (Coleoptera) primary types deposited in the Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil is given. There are 1,044 primary types. Lectotype designation for Megacyllene castroi (Prosen, 1947) is proposed. A brief history of the collection of Cerambycidae of the Museu Nacional is presented.