Plectonotum leymebamba, 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 : 13

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
DOI	https://doi.org/10.5281/zenodo.4637519
persistent identifier	https://treatment.plazi.org/id/03BD8143-FF9B-DA23-FEB7-B07AFB0EFAC7
treatment provided by	Carolina
scientific name	Plectonotum leymebamba
status	sp. nov.

Treatment

Plectonotum leymebamba sp. nov.

( Figs. 12 View Figures 9-16 , 35 View Figures 24-35 , 69-70 View Figures 63-78 , 104 View Figures 93-109 , 119 View Figure 119 )

Type material: Holotype ♂ ( MUSM): Peru, Amazonas, provincia de Chachapoyas, Leymebamba 2 km SW, flowering shrubs, 06°42′53″S, 77°49′06″W, alt. 2,700 m, 08.V.2018, leg. R. Constantin. GoogleMaps Paratypes: 3♂, 2♀, same locality and date as the holotype, leg. R. Constantin. Holotype and two paratypes deposited in the collection of the MUSM, other paratypes preserved in author’s collection ( CCo) .

Description: Holotype. Length 4.0 mm. Head black, the clypeus and the genae orange yellow in front of the antennal sockets. Antennae black, the first two antennomeres with orange yellow ventral side. Mandibles yellow. Labial and maxillary palpi black, their first joint yellow. Prothorax, elytra, abdomen and legs black. Head 0.76 times as wide as pronotum, the clypeus triangularly protruding. Eyes developed, bulging, the interocular space 0.6 times as wide as the head. Frons broad, flattened between the eyes with a median longitudinal depression and two small oblique bumps behind the antennal sockets. Temples short, narrowing backwards. Cephalic surface smooth, very thinly punctate, with thin whitish setae. Antennae 0.8 times as long as the body, the first two antennomeres smooth, the following parallel sided, dull, covered with erected brownish setae. Pronotum 1.47 times wider than long, feebly transversally convex. Front edge slightly arched, rear edge angular, lateral edge moderately narrowing frontwards, rounded with a long narrow bead and a short emargination in front of the basal corners.Pronotal surface shiny, thinly punctate, the punctations twice smaller than the intervals. Elytra 2.8 times longer than combined width at the base, the punctations shallow, rugulose and irregularly disposed, covered with long, thin, obliquely erected pale yellow setae. Aedeagus: tegmen with apex of the lateral lobes parallel sided in dorsal view, forming a rectangular lamina with dense and very long apical setae in lateral view; apico-ventral apophysis slender, their tips with a minute hook; lateral sclerites narrow, straight, the tooth at mid-length minute; median lobe with a narrow styliform projection.

Dimensions of the holotype: TL =4.0 mm;AL = 3.25mm; HW = 0.83 mm; IOW = 0.50 mm; OL = 0.29 mm; IAW = 0.19 mm; PL = 0.74 mm; PW = 1.09 mm; EL = 3.0 mm; EW = 1.06 mm. Length of the antennomeres, in mm: aI = 0.32; aII = 0.13; aIII = 0.31; aIV = 0.35; aV = 0.35; aVI = 0.35 × 0.09; aVII = 0.32; aVIII = 0.32; aIX = 0.27; aX = 0.25; aXI = 0.28. Paratypes ♂: length 3.9-4.1 mm.

Paratypes ♀: Differs from the males by the less convex eyes, shorter antennae and pronotum narrower anteriorly. Dimensions of one paratype ♀. TL = 4.2 mm; AL = 2.6 mm; HW = 0.75 mm; IOW = 0.50 mm; OL = 0.24 mm; IAW = 0.21 mm; PL = 0.72 mm; PW = 1.06 mm; EL = 3.3 mm; EW = 1.1 mm. Other paratype ♀: length 4.5 mm.

Variability: The two female paratypes have yellow genae and reddish-brown clypeus.

Differential diagnosis: Plectonotum leymebamba sp. nov., resembles P. oxapampa sp. nov., and P. bicoloricolle sp. nov., by the pronotal bead. It differs from these two other species by the mostly black colour pattern, thicker antennae, subseriate elytral punctation and the aedeagus shape.

Etymology: Specific name refers to Leymebamba village, close to the type-locality. Noun in apposition.

Natural history: Collected by beating shrubs, on the edge of the road in the morning.