Taxonomic revision of Microdaiphron Pic, 1926 (Coleoptera: Cantharidae: Chauliognathinae)

Abstract

<jats:p>The genus <jats:italic>Microdaiphron</jats:italic> Pic, 1926 is revised. Ten species are recognized as valid: <jats:italic>Microdaiphron polemioides</jats:italic> (Kirsch, 1889), <jats:italic>M. implicitus</jats:italic> (Erichson, 1847) <jats:bold>comb. nov.</jats:bold>, <jats:italic>M. pauloensis</jats:italic> (Pic, 1926), <jats:italic>M. peruvianus</jats:italic> Pic, 1938, <jats:italic>M. mendesensis</jats:italic> (Pic, 1926), <jats:italic>M. tapuruquara</jats:italic> <jats:bold>sp. nov.</jats:bold>, <jats:italic>M. geodesicus</jats:italic> <jats:bold>sp. nov.</jats:bold>, <jats:italic>M. batasitensis</jats:italic> (Pic, 1926), <jats:italic>M. guyanensis</jats:italic> Constantin, 2016, and <jats:italic>M. brevehumeralis</jats:italic> Pic, 1938. Other 23 names within <jats:italic>Microdaiphron</jats:italic> are synonymized with the currently valid species, whilst <jats:italic>Microdaiphron bicoloricornis</jats:italic> Pic, 1947 is transferred to <jats:italic>Malthesis</jats:italic> Motschulsky, 1853. The taxonomic status of three primary homonyms is also discussed. <jats:italic>Daiphron polemioides</jats:italic> var. <jats:italic>atripenne</jats:italic> Pic, 1927 (=<jats:italic>Microdaiphron implicitus</jats:italic> <jats:bold>comb. nov.</jats:bold>) is the senior homonym of <jats:italic>Daiphron atripenne</jats:italic> Pic, 1934 and <jats:italic>Daiphron atripenne</jats:italic> var. <jats:italic>bipartitum</jats:italic> Pic, 1934. The later is synonymized and reinstated as a valid species under the name <jats:italic>D. bipartitus</jats:italic> Pic, 1934. Descriptions, distribution maps and illustrations of diagnostic features are presented for all valid taxa, including the photographs of primary types in all available names within <jats:italic>Microdaiphron</jats:italic>.</jats:p>

Rediscovery of <i>Malthesis ater</i> Motschulsky, 1853 and a catalog of the genus <i>Malthesis</i> Motschulsky, 1853 (Coleoptera, Cantharidae)

“…Brancucci (1981) produced an identification key to genera of Chauliognathini, but grouped all the long-elytra genera in the same couplet due to their weak definition. Although some of these problems have been tackled with the recent taxonomic revisions of Psilorrhynchus (Biffi 2017 and Microdaiphron (Biffi 2019), the classification of the remaining genera remains confusing, with numerous species incorrectly assigned to each one of them. presented a key to Chauliognathinae genera occurring in French Guiana, part of which is recorded for Colombia.…”

“…Psilorrhynchus can be distinguished by the head forming an elongate rostrum in front of the eyes, the typical trapezoidal pronotum, the last abdominal ventrite of females with lyriform notches, and the aedeagus, particularly the shape of left paramere and the digitiform and flap-like projections in the apex of the median lobe (Biffi 2017. The genus Daiphron groups species with Lycidae-like features, such as serrate antennae, elytra widening posteriorly, sometimes with costae, and especially the yellow-and-black aposematic coloration (Biffi 2019, Biffi andRosa 2019). The study of the circumscribed species suggests Daiphron as a heterogeneous and artificial group in need of revision.…”

“…The taxonomy of Malthesis remained stable for almost 70 years, with no taxonomic work being published between last species description and Constantin's (2016) revision of French Guiana Chauliognathinae, in which new species, synonyms, and combinations were proposed in the genus. Later, Biffi (2019) transferred Malthesis bicoloricornis from Microdaiphron . The genus is currently considered valid, with 38 species and subspecies.…”

Capítulo 31: Coleoptera Linnaeus, 1758

“…Está dividida em cinco subfamílias, apenas a primeira não está registrada no Brasil: Cantharinae, Chauliognathinae, Dys-morphocerinae, Malthininae e Silinae. Referências: Delkeskamp (1977), Brancucci (1980Brancucci ( , 1981, Constantin (2008Constantin ( , 2010Constantin ( , 2020, Biffi (2015Biffi ( , 2016Biffi ( , 2017Biffi ( , 2019, Biffi & Casari (2017), Biffi & Constantin (2018a, b) e Biffi & Geiser (2020).…”

Morphology of bromeliad-associated immature stages of Daiphron bipartitus and its adults confirms the non-monophyly of the genus (Coleoptera: Cantharidae)

“…The species is tentatively allocated to Daiphron Gorham, 1881, a genus characterised by lycid-like traits, such as elongate head, serrate antennae, elytra widening posteriorly, and yellow-black aposematic colouration (BIFFI 2019). However, a morphology-based phylogeny of the Chauliognathinae shows that those characters are homoplastic and the genus is currently polyphyletic, with species arising from several clades within the highly diverse and heterogeneous Chauliognathus Hentz, 1830(BIFFI 2017a. A morphological study of immatures of D. bipartitus may bring further evidence for a reassessment and a more accurate positioning of the species within Chauliognathinae genera.…”