Plectonotum altomayo, 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 : 3-4

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-FF95-DA2C-FE83-B77AFEF8FE4D
treatment provided by	Carolina
scientific name	Plectonotum altomayo
status	sp. nov.

Treatment

Plectonotum altomayo sp. nov.

( Figs. 1 View Figures 1-8 , 24 View Figures 24-35 , 47-48 View Figures 47-62 , 93 View Figures 93-109 , 119 View Figure 119 )

Type material: Holotype ♂ ( MUSM): Peru, Amazonas, provincia de Bongará, 1 km East of Abra Patricia , forest edge, 05°40′39″S, 77°46′25″W, alt. 1,970 m, 11.V.2018, leg. R. Constantin. GoogleMaps Paratypes: 2♂, 5♀, same locality and same date of holotype. Holotype and three female paratypes deposited in the collection of the MUSM, other paratypes preserved in author’s collection ( CCo) .

Description: Holotype. Length 3.6 mm. Head black, the clypeus and the genae orange yellow in front of the antennal sockets. Antennae black, the first two antennomeres yellow with brown dorsal patches, the third brownish yellow. Mandibles yellow. Labial and maxillary palpi black, their first joint yellow. Legs black, the front tibiae reddish brown. Prothorax black. Elytra black, a narrow pale-yellow line along the lateral margins and the epipleura. Abdomen black. Head 0.8 times as wide as pronotum, the clypeus triangularly protruding. Eyes developed, bulging, the interocular space 0.57 times as wide as the head. Frons broad, flattened between the eyes. Temples short, narrowing backwards. Cephalic surface smooth, superficially microreticulate, thinly punctate, with thin whitish setae. Antennae two thirds as long as the body, the first two antennomeres smooth, the following parallel sided, dull, covered with thin brown setae. Pronotum ( Fig. 24 View Figures 24-35 ) 1.5 times wider than long, transversally convex. Front edge medially flat and laterally arched, rear edge angular, lateral edge rounded with a long narrow bead and a small emargination in front of the basal corners. Pronotal surface shiny,markedly punctate, with punctations as wide as the intervals. Elytra 2.8 times longer than combined width at the base, strongly and subseriately punctate, covered with long, thin, recumbent pale-yellow setae. Aedeagus ( Figs. 47-48 View Figures 47-62 , 93 View Figures 93-109 ): tegmen with apex of the lateral lobes dilated with triangular internal callus; the pair of apico-ventral apophyses narrow and recurved,as also the long lateral sclerites and the tip of the median lobe.

Dimensions of the holotype: TL = 3.6 mm; AL = 2.4 mm; HW = 0.78 mm; IOW = 0.45 mm; OL = 0.25 mm; IAW = 0.19 mm; PL = 0.63 mm; PW = 0.94 mm; EL = 2.65 mm; EW = 0.93 mm. Length of the antennomeres, in mm: aI = 0.27; aII = 0.12; aIII = 0.20; aIV = 0.24; aV = 0.25; aVI = 0.25; aVII = 0.23; aVIII = 0.23; aIX = 0.20; aX = 0.19; aXI = 0.22. Paratypes ♂: length 3.9 mm.

Paratypes ♀: Differ from males by the less convex eyes, shorter antennae, and pronotum narrowing anteriorly. Dimensions of one paratype ♀.TL = 4.3 mm; AL = 2.7 mm; HW = 0.73 mm; IOW = 0.48 mm; OL = 0.23 mm; IAW = 0.22 mm; PL = 0.72 mm; PW = 1.13 mm; EL = 3.3 mm; EW = 1.12 mm. Other paratypes ♀: length 4.2-4.7 mm, mean 4.35 mm.

Variability: The two male paratypes have uniform black elytra, and one of them has dull, markedly microreticulate cephalic and pronotal surface.

Differential diagnosis: Plectonotum altomayo sp. nov.,is similar to P.oxapampa sp.nov.,and P.bicoloricolle sp.nov., with similar pronotal bead. It differs from these latter by the mostly black colour pattern, thicker antennae, subseriate elytral punctation, and the aedeagus shape.

Etymology: Specific name refers to “Bosque de Protección Alto Mayo”, close to the Área de Conservación

Privada “Abra Patricia” on the road to Paso Pardo de Miguel. Noun in apposition.

Natural history: Collected by beating shrubs and trees, mainly Melastomataceae close to the genus Miconia , on the edge of the mountain forest, whose foliage was still wet in the morning.