Peltariosilis parviscutellaris, 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 : 20-21

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/03CA7502-1628-366D-ADDB-FF69DC633564
treatment provided by	Carolina
scientific name	Peltariosilis parviscutellaris
status	sp. nov.

Treatment

Peltariosilis parviscutellaris sp. nov.

( Figs. 1B View Figure 1 , 7A View Figure 7 , 10M View Figure 10 , 11C View Figure 11 , 12M View Figure 12 , 13J View Figure 13 , 14J, 17 View Figure 17 I-L) Type series: HOLOTYPE ♂ ( MPEG):“Icoraci / 19.12.1961 // Brasil, PA / J. & B. Bechyné ” ( Fig. 7A View Figure 7 ) . PARATYPES (16 specimens):“ Icoraci / 19.12.1961 // Brasil, PA / J. & B. Bechyné ” (3 ♂, MPEG, 3 ♂, MZUSP 31244-31246 View Materials ) ; “ Icoraci , Belém / PA, Brasil / 3.VIII.1962 / J. Bechyné col.” (3 ♂, MZUSP 31247-31249 View Materials ) ; “ Marituba / 7.11.1961 // Brasil, PA / J. & B. Bechyné ” (1 ♂, MPEG) ; “ Benevides / 20.11.1961 // Brasil,PA / J. & B.Bechyné ” (1 ♂, MPEG) ; “ Utinga / 7.12.1961 // Brasil, PA / J. & B. Bechyné ” (1 ♂, MPEG) ; “ Utinga / 30.12.1960 // Brasil, PA / J. & B. Bechyné ” (1 ♀, MPEG) ; “ Belém , Utinga / 24.III.1977 // Brasil Pará / M F Torres” (2 ♀, MZUSP 31250- 31251 View Materials ) ; “ Benfica / 31.5.1961 // Brasil, PA / J. & B. Bechyné ” (1 ♀, MPEG) .

Diagnosis: Antennae slightly swollen at middle antennomeres, ventral surface slightly flattened; antennomeres I-II testaceous brown, III-IX light to dark brown. X-XI orange brown; pronotum and scutellum orange brown, slightly translucent; elytra dark brown, lighter at lateral margins and along suture; apex of laterobasal lobe of pronotum rounded, split, forming juxtaposed dorsal and ventral flaps; dorsal projections well-projected, transverse, distal margin arcuate, sharp, very wide and acute lateral peaks surpassing sides of pronotum; scutellum with very slender lamellar projection, narrower near base and slightly wider distally, apices slightly projected, not forming well-defined fork. Peltariosilis parviscutellaris sp. nov. is similar to P. mitarakaemontis and P. brunneoapicalis sp. nov. by the shape of scutellar projection not forming distinct fork. It differs from these species by the sharp, broad and transversal dorsal projections of pronotum.

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

Male: ( Fig. 7A View Figure 7 ): Antennae rather long; antennomere I elongate, slightly wider apically, II short, cylindrical, 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. 10M View Figure 10 ): anterior margin arched, slightly projected; frontolateral lobe broad, continuous with anterior margin, sides rounded; angles of laterobasal lobe broadly rounded, indistinct; laterobasal lobe directed posteriorly and dorsally, apex rounded, split, forming juxtaposed dorsal and ventral flaps; dorsal projections well-projected, transverse, directed postero-dorsally, distal margin arcuate, sharp, forming an inner dull peak and very wide and acute lateral peaks surpassing sides of pronotum. Scutellum ( Fig. 12M View Figure 12 ) with very slender lamellar projection, narrower near base and slightly wider distally, apices acute, slightly projected, not forming well-defined fork. Elytra nearly parallel, apex rounded. Abdominal tergite VIII ( Fig. 13J View Figure 13 ) quadrate, lateral margins nearly parallel, glandular pores not protruding; posterior margin broadly concave. Ventrite VII ( Fig. 14J) small, lateral margins sinuate, wider anteriorly, with a small constriction at middle; posterior margin with a small rounded projection near middle. Aedeagus ( Figs. 17 View Figure 17 I-L): ventral plaque of tegmen lateroventrally, elongated, as long as internal sac, flattened laterally, curved internally at middle and divergent at apex, margins sinuated, narrower at middle, wider at apex, apex broadly rounded with a dorsally curved acute tip; parameres fused at base and nearly parallel, slightly divergent, regularly and strongly curved dorsally, apex rounded with a small acute tip; median lobe membranous, translucent; internal sac elongated, narrow, straight, nearly as long as ventral, median and paramedian dorsal sclerites; median dorsal sclerite indistinct or absent; paramedian dorsal sclerites slender, strongly sclerotised, elongated, parallel, nearly straight, slightly curved dorsally, apex abruptly narrowed, sharp, pointing dorsally; ventral sclerites slender, as long as internal sac, apex acute, slightly divergent; lateral sclerites indistinct or absent.

Female: General appearance and colouration similar to males; antennae shorter, antennomeres slightly conical, more densely pubescent, middle antennomeres not swollen; clypeus ( Fig. 1B View Figure 1 ) projected anteriorly in a conical beak; pronotum ( Fig. 11C View Figure 11 ) rather transverse, wider than long, frontolateral lobes very broad and short; laterobasal lobe short, slightly projecting, dorsal projections absent; median and basal grooves shallow; scutellum simple, without projection; ventrite VII with a deep and broad median notch on distal margin, entire, not divided in two halves.

Etymology: The specific epithet parviscutellaris is formed from the Latin word parvus (small, weak) + scutellum, referring to the small size of scutellar fork in comparison with closely related species.

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