Plectonotum huariaca, Constantin, 2020

Constantin, Robert, 2020, A contribution to the genera Plectonotum Gorham and Hyponotum Wittmer, with the description of sixteen new species from Peru (Coleoptera, Cantharidae), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60 (34), pp. 1-27 : 7-11

publication ID	https://doi.org/ 10.11606/1807-0205/2020.60.special-issue.34
publication LSID	lsid:zoobank.org:pub:27019209-D6C3-47EA-8B16-213EC117A891
persistent identifier	https://treatment.plazi.org/id/03BD8143-FF91-DA25-FC42-B43AFE39FEE7
treatment provided by	Carolina
scientific name	Plectonotum huariaca
status	sp. nov.

Treatment

Plectonotum huariaca sp. nov.

( Figs. 8 View Figures 1-8 , 31 View Figures 24-35 , 61-62 View Figures 47-62 , 100 View Figures 93-109 , 119 View Figure 119 )

Type material: Holotype ♂ ( MUSM): Peru, provincia de Pasco, 30 km N de Cerro de Pasco, Huariaca 5 km S, 10°30′07″S, 76°10′50″W, alt. 3,290 m, 31.III.2017, leg. R. Constantin. GoogleMaps Paratypes: 1♂, 8♀, same locality and date as the holotype GoogleMaps ; – 1♂, 3♀,provincia de Huanuco, 30 km W de Huanuco, Huancapallac 2 km W, 09°53′43″S, 76°26′27″W, alt. 3,055 m, 01.IV.2017, leg. R. Constantin. GoogleMaps Holotype and six paratypes deposited in the collection of MUSM, other paratypes preserved in the author’s collection ( CCo) .

Description: Holotype. Length 2.9 mm. Head black, clypeus rufous. Mandibles yellow with brown tip. Palpi brown. Antennomeres I-II fulvous, III-XI black. Pronotum, elytra and abdomen black. Legs brown. Head 0.76 times as wide pronotum. Eyes small, feebly bulging. Frons flattened between the eyes, the vertex slightly convex. Temples long, convex. Cephalic surface glossy, without visible punctation, covered with long, thin yellowish setae, directed toward the base of the eyes. Antennae slen- der, the first antennomere elongate, feebly arched, three times longer than wide, II short, III slightly wider apically and twice longer than wide, the following subparallel-sided. Pronotum 1.62 times wider than long. Front edge right, rear edge weakly arched, both thinly bordered, lateral edges right in the middle part with a nar- row bead, apical corner obliquely bevelled, basal corner right angled. Disc convex, glossy with thin punctation and long adpressed yellowish setae. Elytra 2.6 times longer than their combined width at the base, not costate, the apex widely rounded. Elytral surface weakly subseriate and roughly punctate, the punctations 1.5 times wider than their intervals, covered with long yellowish setae, obliquely directed backwards. Legs simples, tarsi rather elongate, the metatarsi about three-fifths of metatibial length, the claws thin, without basal denticles. Abdominal sternite VIII subquadrate with rounded apical corners. Aedeagus: tegmen as long as wide; apices of lateral lobes subquadrate; apico-ventral apophysis long, narrow. Lateral sclerites narrow, denticulate in their centre. Median lobe short, with narrow recurved tip.

Dimensions of the holotype: TL = 2.9 mm;AL = 2.15mm; HW = 0.64 mm; IOW = 0.41 mm; OL = 0.19 mm; IAW = 0.14 mm; PL = 0.52 mm; PW = 0.84 mm; EL = 2.12 mm; EW = 0.82 mm. Length of the antennomeres, in mm: aI = 0.26; aII = 0.1; aIII = 0.19; aIV = 0.24; aV = 0.27; aVI = 0.27; aVII = 0.28; aVIII = 0.26; aIX = 0.25; aX = 0.23; aXI = 0.26. Paratypes ♂: length 2.4-3.1 mm, mean 2.7 mm.

Paratypes ♀: Differ from the males by the smaller eyes, shorter antennae, pronotal width broader than elytral base, complete lack of metathoracic wing, weakly-marked humeral calli, and shorter elytra covered with shorter pubescence. Dimensions of a medium sized specimen ♀. TL = 2.7 mm; AL = 1.9 mm; HW = 0.61 mm; IOW = 0.45 mm; OL = 0.17 mm; IAW = 0.16 mm; PL = 0.54 mm; PW = 0.9 mm; EL = 2.0 mm; EW = 0.84 mm. Paratypes ♀: length 2.5-3.1 mm, mean 2.8 mm.

Differential diagnosis: Plectonotum huariaca sp. nov., is similar to the Ecuadorian species P.nigricorne Constantin, 2008 by the habitus, colour pattern and pronotal shape. It differs from the latter in the shape of the aedeagus and the peculiar apterism of the females.

Etymology: The specific epithet is the locality name, which could mean “locality with warm air”, or as a homage to the General Inca Inti-Waraca. Noun in apposition.

Natural history: Collected beating low Asteraceae bushes among pastured meadows.