Peltariosilis cleidecostae, 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 : 16-17

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/03CA7502-1634-3669-AE86-F969DAC83724
treatment provided by	Carolina
scientific name	Peltariosilis cleidecostae
status	sp. nov.

Treatment

Peltariosilis cleidecostae sp. nov.

( Figs. 4 View Figure4 A-D, 6E, 10K, 12K, 13H, 14H, 17A-D)

Type series: HOLOTYPE ♂ ( MZUSP 31239 View Materials ):“ BRASIL. Acre, Mâncio Lima / Pé da Serra / 18.iii.2006. Armadilha de luz / AR Calor Col. // MZUSP 31239 View Materials ” ( Fig.6E View Figure 6 ) . PARATYPES:“Rio Branco / Acre Bras. / 29.X.1954 // Museum Frey / Tutzing // Naturhistorisches / Museum Basel / Coll. W. Wittmer” (1 ♂, NHMB).

Diagnosis: Antennae not distinctly swollen, ventral surface slightly flattened, antennomeres I-II and X-XI

testaceous yellow, III-IX gradually infuscate; pronotum and scutellum testaceous yellow, slightly translucent; elytra dark brown, slightly lighter at lateral margins; pronotum with low, sharp dorsal projections, lateral peaks short, not reaching lateral margins of pronotum; apex of laterobasal lobes truncate, oblique, divided in two flaps; scutellum with a long forked projection strongly narrowed at middle and abruptly widened and split towards apex, forming apical fork, apices of fork acute, long, parallel, pointing anteriorly. Peltariosilis cleidecostae sp. nov. is very similar to P. brancuccii sp. nov. Both distinguish from other species by the shape of scutellar projection strongly narrowed at middle then abruptly widened, with parallel apices, and by the truncate and oblique apex of laterobasal lobes. Peltariosilis cleidecostae sp. nov. is distinguished by the more projected anterior margin of pronotum, dorsal projections wider, almost reaching lateral margins of pronotum, and shorter scutellar projection.

Description: Head black, except anterior margin of clypeus, light brown; labium, maxillae, palpi and base of mandibles pale yellow, apex of mandibles light brown; antennomeres I-II and X-XI testaceous yellow, III-IX gradually infuscate,dark brown; pronotum and scutellum testaceous yellow, slightly translucent; elytra dark brown, slightly lighter at lateral margins; legs testaceous yellow, slightly infuscate at tarsi; thorax and abdomen dark brown.

Male: ( Fig. 6E View Figure 6 ): Antennae rather long; antennomere I elongate, slightly wider apically, II short, cylindrical, 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. 10K View Figure 10 ): anterior margin arched, projected; frontolateral lobe narrow, not continuous with anterior margin, sides rounded; angles of laterobasal lobe indistinct, broadly rounded; laterobasal lobe directed posteriorly and dorsally, posterior margin rounded, apex truncate, oblique, split, forming juxtaposed dorsal and ventral flaps; apex of ventral flap with a broad membranous projection; dorsal projections low, transverse, directed postero-dorsally, distal margin arcuate, sharp, forming an inner acute peak and short lateral peaks not reaching sides of pronotum. Scutellum ( Fig. 12K View Figure 12 ) with a long forked projection anteriorly; scutellar projection strongly narrowed at middle and abruptly widened and split towards apex, forming apical fork with arched sides; apices of fork acute, long, parallel, pointing anteriorly. Elytra nearly parallel, apex rounded. Abdominal tergite VIII ( Fig. 13H View Figure 13 ) nearly as long as wide, lateral margins broadly arched, wider medially, glandular pores not protruding, distal margin with a broad and deep concave median notch. Ventrite VII ( Fig. 14H) wide, lateral margins arched, wider medially; posterior margins with broad rounded projections near middle. Aedeagus ( Fig. 17 View Figure 17 A-D): ventral plaque of tegmen laterally, elongated, nearly as long as internal sac, flattened laterally, nearly straight, broader at base, gradually narrowing at apex and slightly curved internally, with a dorsally curved acute tip; parameres fused at base and slightly divergent, slightly curved dorsally,apex narrowed, strongly curved dorsally, with acute tip; median lobe membranous, translucent; internal sac elongated, narrow, straight; one single median dorsal sclerite, elongated, narrow, apex acute, arched at base, straight from middle; paramedian dorsal sclerites robust, strongly sclerotised, elongated, apex strongly curved dorsally, before the apex with a number of irregular furrows; ventral sclerites slender, shorter than internal sac, apex acute, slightly divergent; lateral sclerites indistinct or absent.

Female: Unknown.

Etymology: The specific epithet is patronymic, named for Professor Cleide Costa (MZUSP) on the occasion of her 80 th birthday, in honour of her contributions to the systematics of Coleoptera and pioneering studies on immature stages of Neotropical beetles.

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

Remarks: Further information on the type locality: “Igarapé do Amor, near IBAMA office. Going up Moa River, first right affluent” [ca. 7˚28′S, 73˚37′W] (Adolfo Calor, personal communication).