Peltariosilis orientalis, 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 : 16

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
persistent identifier	https://treatment.plazi.org/id/03CA7502-1634-3676-ADF8-FEE9DB123584
treatment provided by	Carolina
scientific name	Peltariosilis orientalis
status	sp. nov.

Treatment

Peltariosilis orientalis sp. nov.

( Figs. 6D View Figure 6 , 10J View Figure 10 , 12J View Figure 12 , 13G View Figure 13 , 14G, 16 View Figure 16 M-P)

Type series: HOLOTYPE ♂ ( CZMA): “ Brasil (MA), C.N. Maranhão / REBIO –Res. Biol. Gurupi / 03˚14′01″S/46˚40′52″W // Armadilha Luminosa / 03- 07.v.2011, M. M. Abreu & / J. A. Silva, cols” ( Fig. 6D View Figure 6 ) . PARATYPES (5 specimens): “ Brasil (MA), C.N. Maranhão / REBIO –Res. Biol. Gurupi / 03˚14′05″S/46˚41′83″W // Arm. Luminosa Móvel / 07-15.I.2011, F.Limeira-de- / Oliveira & M. M. Abreu,cols” (2 ♂, CZMA) ; “ Brasil (MA), C.N. Maranhão / REBIO –Res. Biol. Gurupi / 03˚14′05″S/46˚41′83″W // Arm. Suspensa / 07-15. I.2011, F. Limeira-de- / Oliveira & D. W. A. Marques ” (1 ♂, CZMA) ; “ Brasil (MA), Bom Jardim / REBIO –Res. Biol. Gurupi / Armad. Luminosa Base // 05 – 15. vi. 2010, J.C. / Silva, J. A. Silva, A. A. / Santos & T. T. A. // MZUSP 31236 View Materials ” (1 ♂, MZUSP 31236 View Materials ) ; “ Brasil (MA), C.N. Maranhão / REBIO –Res. Biol. Gurupi / 03˚14′01″S/46˚40′52″W // Armadilha Luminosa / 03- 07.v.2011, M. M. Abreu & / J. A. Silva, cols // MZUSP 31237 View Materials ” (1 ♂, MZUSP 31237 View Materials ) .

Diagnosis: Antennae not distinctly swollen, ventral surface slightly flattened, antennomeres I to basal half of III testaceous yellow, the following dark brown, X-XI orange yellow; pronotum and scutellum orange brown; elytra dark brown, testaceous yellow at lateral margins and along sutures; pronotum with low, dull dorsal projections, not reaching lateral margins of pronotum; wellmarked angles at laterobasal lobe; laterobasal lobes curved, apex rounded, divided in two flaps; scutellum with a long forked projection; apices short, acute, divergent, pointing latero-anteriorly. Peltariosilis orientalis sp. nov. is similar to P. scutulata by the general body colouration and shape of scutellar projection. Peltariosilis orientalis sp. nov. differs by the less prominent anteri- or margin of pronotum, continuous with frontolateral lobes, which are broader; dorsal projection of pronotum shallower,and shorter laterally;apices of scutellar projection shorter.

Description: Head black, except anterior margin of clypeus, dark brown; labium, maxillae, palpi and base of mandibles orange yellow,apex of mandibles dark brown; antennomeres I to basal half of III testaceous yellow, the following dark brown, X-XI orange yellow; pronotum and scutellum orange brown, slightly translucent; elytra dark brown, testaceous yellow at lateral margins and along sutures; legs orange yellow, slightly infuscate at distal tarsomeres; thorax and abdomen dark brown.

Male: ( Fig. 6D View Figure 6 ): Antennae rather short; antennomere I elongate,slightly wider apically,II short,slightly wider apically, III-IX nearly oblong, narrower proximally, flattened at ventral surface, X-XI slightly narrower, slender. Anterior margin of clypeus with a broad arcuate concave notch.

Pronotum ( Fig. 10J View Figure 10 ): anterior margin broadly arched, continuous with frontolateral lobes; frontolateral lobe broad, sides rounded, sides behind frontolateral lobe rounded, slightly convergent; angles of laterobasal lobe obtuse, well-marked; laterobasal lobe directed posteriorly and dorsally, posterior margin straight, anterior margin sinuous, apex swollen, rounded,split, forming juxtaposed dorsal and ventral flaps; apex of ventral flap with a short membranous projection; dorsal projections low, transverse, directed postero-dorsally, distal margin slightly arcuate, forming an inner dull peak and short lateral peaks not reaching sides of pronotum. Scutellum ( Fig. 12J View Figure 12 ) with a long forked projection anteriorly; scutellar projection strongly narrowed at middle and gradually widened and split towards apex, forming apical fork with arched sides; apices of fork short, divergent, pointing anteriorly. Elytra nearly parallel, apex rounded. Abdominal tergite VIII ( Fig. 13G View Figure 13 ) subtrapezoidal, lateral margins broadly arched, wider anteriorly,slightly convergent posteriorly,glandular pores strongly protruding, distal margin with a broad and deep concave median notch. Ventrite VII ( Fig. 14G) wide, trapezoidal, lateral margins wider anteriorly, convergent posteriorly; posterior margins straight laterally, with a low rounded projection internally. Aedeagus ( Fig. 16 View Figure 16 M-P): ventral plaque of tegmen lateroventral,elongated,as long as internal sac,flattened laterally,curved internally,lateral margins arched, broad at base, narrowed at middle, wid- er at apex, apex broadly rounded with a dorsally curved acute tip; parameres fused at base and slightly divergent, regularly curved dorsally, apex narrowed with a small acute tip; median lobe membranous, translucent; internal sac elongated, narrow, straight, slightly sclerotised; one single median dorsal sclerite, elongated, narrow, apex acute; paramedian dorsal sclerites robust, strongly sclerotised, elongated, parallel, slightly curved dorsally, apex narrowed and divergent, pointing laterally; ventral sclerites slender,as long as internal sac,apex acute, slightly divergent; lateral sclerites indistinct or absent.

Female: Unknown.

Etymology: The specific epithet orientalis refers to the distribution of the species, in the easternmost reaches of Amazon forest.

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