Plectonotum costae, 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

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-DA29-FEED-B63AFB6AF8E7
treatment provided by	Carolina
scientific name	Plectonotum costae
status	sp. nov.

Treatment

Plectonotum costae sp. nov. ( Figs. 6 View Figures 1-8 , 29 View Figures 24-35 , 57-58 View Figures 47-62 , 98 View Figures 93-109 , 119 View Figure 119 )

Type material: Holotype ♂ ( MUSM): Peru, Cajamarca, provincia de Celendin, Punre 500 m S, flowering shrubs, 06°59′53″S, 78°17′07″W, alt. 3,460 m, 05.V.2018, leg. R. Constantin. GoogleMaps Paratypes: 5♂, 2♀, same locality and date as the holotype, leg. R. Constantin. Holotype and three paratypes deposited in the collection of the MUSM, oth- er paratypes preserved in author’s collection ( CCo) .

Description: Holotype. Length 3.7 mm. Head, pronotum and elytra black. Antennae black, the ventral face of the second antennomere orange-yellow. Legs black, the apical half of tibiae and tarsi brown. Abdomen brown. Head 0.77 times as wide as pronotum, the clypeus feebly arched. Eyes short, bulging, the interocular space 0.66 times as wide as the head. Frons feebly convex between the eyes. Temples short and convex. Cephalic surface smooth, markedly punctate, with thin whitish setae. Antennae shorter than the body, the first antennomere smooth, the following parallel sided, slightly dull, covered with thin fulvous setae. Pronotum 1.5 times wider than long, longitudinally and transversally convex. Front edge feebly arched; front corners bevelled; lateral edge rounded with a convex bead, wider at mid-length and narrowing frontwards and backwards and a notch in front of the basal corners; basal edge feebly bi-sinuous, strongly punctate. Pronotal surface shiny, strongly punctate on the disc, more thinly near the sides with punctations 0.66 times as wide as intervals. Elytra 2.55 times longer than combined width at the base, markedly punctate, the punctations irregularly seriate, covered with long, thin, recumbent whitish setae. Aedeagus: tegmen with apico-ventral edges reduced and extended dorsally by a long, slender apophysis; lateral sclerites with a long tooth at mid-length, their tips folded ventrally; median lobe with thin tip.

Dimensions of the holotype: TL = 3.7 mm;AL = 2.85mm; HW = 0.85 mm; IOW = 0.58 mm; OL = 0.25 mm; IAW = 0.21 mm; PL = 0.75 mm; PW = 1.12 mm; EL = 2.6 mm; EW = 1.02 mm. Length of the antennomeres, in mm: aI = 0.30; aII = 0.17; aIII = 0.25; aIV = 0.28; aV = 0.29; aVI = 0.27; aVII = 0.25; aVIII = 0.25; aIX = 0.25; aX = 0.24; aXI = 0.26. Paratypes ♂: length 3.3-3.5 mm.

Paratypes ♀: Differ from the males by smaller and less bulging eyes, the shorter antennae, and the more transverse pronotum. Dimensions of one paratype ♀. TL = 3.7 mm; AL = 1.9 mm; HW = 0.8 mm; IOW = 0.58 mm; OL = 0.21 mm; IAW = 0.24 mm; PL = 0.77 mm; PW = 1.18 mm; EL = 2.7 mm; EW = 1.1 mm. Other paratypes ♀: length 3.8-3.9 mm.

Differential diagnosis: Plectonotum costae sp. nov., is similar to P. amazonas sp. nov., by the size and body colour, but differs in the lateral bead, convex and dilated in its centre, the shorter antennae and the aedeagus with the latero-apical parts of tegmen projecting dorsally,and a slender and acute apophysis.

Etymology: Respectfully dedicated to honor Doutora Cleide Costa, prominent specialist of the immatures and adults of the Coleoptera Elateroidea , and also for her major investment in the training of a new generation of entomologists.

Natural history: Collected beating the foliage of wet trees, after a short midday rain, on the hedge of the earth road, 500 m before reaching Punre village, togeth- er with the cantharids Plectonotum huertoae sp. nov., Chauliognathus cf. nigronotaticeps Pic,1947 and Discodon humeropictum Wittmer, 1954 .