Peltariosilis major, Biffi & Geiser, 2020

Biffi, Gabriel & Geiser, Michael, 2020, A revision of Peltariosilis Wittmer (Coleoptera: Cantharidae), a surprisingly diverse Amazonian radiation, Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60 (16), pp. 1-26 : 7-9

publication ID	https://doi.org/ 10.11606/1807-0205/2020.60.special-issue.16
publication LSID	lsid:zoobank.org:pub:3C128243-07E3-4435-A496-D8F50F68389E
DOI	https://doi.org/10.5281/zenodo.4985731
persistent identifier	https://treatment.plazi.org/id/03CA7502-163D-3671-A916-FC29DC8031E4
treatment provided by	Carolina
scientific name	Peltariosilis major
status	sp. nov.

Treatment

Peltariosilis major sp. nov.

( Figs. 4 View Figure4 E-H, 5F, 10F, 12F, 13C, 14C, 15I-L)

Type series: HOLOTYPE ♂ ( INPA):“ BRASIL, Amapá, Serra do Navio, / Estrada Lagoa Azul, / 0˚52′52″N–51˚58′49″W, / Varredura , 18.iv.2014, J. T. / Câmara, A. Plant & J.A. Rafael // Peltariosilis / n. sp. / det. M. Geiser 2018” ( Fig. 5F View Figure 5 ).

Diagnosis: Pronotum with laterobasal lobe flattened, apex curved downwards, with acute lateral spine; dorsal projections very small, sharp, distal margins sinuous, with acute lateral apex acute, pointing posteriorly; scutellar projection lamellar, long, triangular, nearly symmetrical, regularly narrowing apically. Peltariosilis major sp. nov. differs from all other species by the very small dorsal projections of pronotum and by laterobasal lobes flattened dorsally with apex acute curved downwards.

Description: Head mostly black, slightly lighter at anterior margin of clypeus; maxillae and labium testaceous yellow; mandibles light brown, darker apically; antennae mostly black, antennomeres I-II orange brown, X-XI dark brown; pronotum and scutellum light orange brown, slightly translucent; elytra dark brown, lighter at lateral margins; legs light orange brown; thorax and abdomen dark brown.

Male: ( Fig. 5F View Figure 5 ): Antennae short; antennomere I elongate, slightly wider apically,II short, cylindrical,III-VIII nearly fusiform,slightly swollen,IX-XI slender.Pronotum ( Fig.10F View Figure 10 ): anterior margin broadly arched, continuous with frontolateral lobes; laterobasal lobe with one small acute lateral spine, dorsal surface flattened, posterior margin sharp, oblique, apex acute, strongly curved downwards; dorsal projections very small, posterior margin sharp, sinuous, with small acute lateral spine pointing posteriorly. Scutellum ( Fig. 12F View Figure 12 ) with a long, nearly symmetrical, triangular lamellar projection, regularly narrowing apically. Elytra nearly parallel,slightly wider posteriorly;apex truncate. Abdominal tergite VIII ( Fig. 13C View Figure 13 ) very broad, trapezoidal, lateral margins broadly rounded, wider medially; glandular pores not protruding; distal margin concave, with a small, shallow rounded median notch. Ventrite VII ( Fig. 14C) wide, lateral margins slightly convergent posteriorly, wider anteriorly; posterior margin arched; internal margins of median incision nearly parallel, halves broadly separated. Aedeagus ( Fig. 15 View Figure 15 I-L): ventral plaque of tegmen lateroventral, as long as internal sac, flattened laterally, broad, apex oblique with an acute dorsal pointing tip; parameres fused at base and broadly divergent apically and curved dorsally, apex rounded with small tip pointing dorsally; median lobe membranous, translucent; internal sac tubular, very elongate, slightly curved dorsally, moderately sclerotised, apex membranous; one pair of median dorsal sclerites sinuous, divergent at base than convergent at apex,apex acute, slightly curved ventrally; one pair of short, acute, sclerotised lateral sclerites; paramedian dorsal sclerites elongate, slightly curved internally narrowing at apex, flanking median dorsal sclerites; ventral sclerites not flanking internal sac, parallel to dorsal sclerites and paramedian dorsal sclerites, very elongated, slender, sinuous, curved internally, apex acute, convergent, directed ventrally.

Female: Unknown.

Etymology: The specific epithet major (Latin for“larger”) refers to the larger size of the species in comparison with the others.

Distribution: Brazil (Amapá state) ( Fig. 18 View Figure 18 ).