Yuracarus cosnipatensis, Chani-Posse & Rodríguez-Melgarejo & Ramírez-Salamanca, 2025

Chani-Posse, Mariana Raquel, Rodríguez-Melgarejo, Maryzender Erceliz & Ramírez-Salamanca, José Manuel, 2025, Systematics and phylogeny of the Andean genera Konradus Chani-Posse & Ramírez-Salamanca and Yuracarus gen. nov. (Coleoptera: Staphylinidae), Arthropod Systematics & Phylogeny 83, pp. 331-352 : 331-352

Yuracarus cosnipatensis sp. nov.

Figures 2 D , 5 Q , 6 F , 7 , 8 , 9

Type material.

Holotype ♂, with labels: [printed white label] “ PERU: CU, Kosñipata, Wayqecha , / Wayqecha Trocha / Canopy 13°11’32.8’’S, / 71°35’16.0’’W, 2931 m ”, “ 02.xi.2017, cloud forest, / sifting of leaf litter, M. / Rodríguez & L. Pérez leg ”, [red label] “ Holotype Yuracarus / cosnipatensis Chani-Posse / et al. 2025 ” ( MUSM) . Three paratypes: 1 ♀ with white handwritten label “ PERU: CU, Cosñipata / Valley Centro / Investigación Wayqecha , / 2837 m, 13°11’20.9’’S, / 71°35’4.08’’W ”, 20.x.2007, / árboles caídos, C. Castillo ” ( MUSM) , 1 ♀ with printed white label “ PERU: CU, Kosñipata, / Wayqecha , trocha Canopy / I, 2986 m, 13°11’10.20’’S, / 71°35’17.28’’W, 27-30 / x. 2019, trampas amarillas, / M. Rodríguez et al. leg ” ( MUSM) and 1 ♀ (Fig. 2 D ) with white printed label “ PERU: CU, Cosñipata / Valley Centro / Investigación Wayquecha , / 2837 m, 13°11’20.9’’S, / 71°35’4.8’’W 20.x.2007, árboles caídos, C. Castillo ” ( MUSM) . All paratypes with additional red label: “ Paratype Yuracarus / cosnipatensis Chani-Posse / et al. 2025 ”

Diagnosis.

Yuracarus cosnipatensis can be identified among other species of Yuracarus by the following combination of characters: antennomeres 8–10 quadrate, eyes at least 0.6 × the length of the temples, the distance separating the medial interocular punctures on the frons at least 2.5 × distance separating the medial punctures from the lateral punctures, and the head as wide as the pronotum (HW / PW = 1.0).

Description.

Body length 8.8–9.0 mm (4.8–5.0 mm, abdomen excluded), body overall scarcely setose, almost glabrous. — Colouration: Head and thorax dark metallic green, elytra goldish metallic green, abdomen shiny black to piceous-black; antennae, palpi and legs piceous to piceous-black. — Head: about as long as wide (HW / HL = 0.9–1.0), as wide as pronotum at widest point (HW / PW = 1.0); epicranium with medial interocular punctures separated by distance 2.5 × as large as distance separating medial punctures from lateral punctures. Eyes distinctly shorter than temples (EL / TL = 0.7) seen from above. Antennae with first antennomere moderately to distinctly shorter than second and third combined, third 1.2–1.3 × as long as second, fourth-seventh longer than wide, eighth-tenth about as long as wide. Labial palpus with third palpomere 1.5 × as long as second. Maxillary palpus with fourth palpomere (apical) 1.5 × as long as third. Neck about 0.4–0.5 x as wide as head at widest point. — Pronotum: moderately to slightly longer than wide (PW / PL = 0.8–0.9), dorsal rows of punctures each with 4 punctures. Legs: Mesotarsi as long as mesotibiae, metatarsi slightly shorter than metatibiae, first metatarsomere shorter than fifth (S 1 / S 5 = 0.8). — Elytra: at sides distinctly longer than pronotum at midline (EtL / PL = 1.3). — Male sexual characters: Sternum 8 deeply emarginate medio-apically. Aedeagus with median lobe distinctly narrowed at its apical fourth into a subacute apex, internal sac with one pair of elongate and sclerotized structures (Fig. 6 F ). — Female sexual characters: As described for the genus, with tergum 10 arcuate apically.

Geographical distribution.

Yuracarus cosnipatensis sp. nov. is currently recorded only from the locality of Cosñipata (Cosñipata district, Paucartambo province) in Cuzco department, from the Tropical Andes of Peru, at 2837 and 2931 m of altitude (Figs 7 , 9 ).

Etymology.

The specific name cosnipatensis is a Latinized adjective referring to the locality of Cosñipata, where this species was collected.

Figures

Figure 2. A Konradus leehermani Chani-Posse & Ramírez-Salamanca [NHMUK ©]; B Konradus cuscensis sp. nov. (HT, male) [FMNH ©]; C Konradus trescrucensis sp. nov. (PT, male) [MUSM ©]; D Yuracarus cosnipatensis sp. nov. (PT, female) [MUSM ©]; E Yuracarus napoensis sp. nov. (PT, female) [CNC ©]; F Yuracarus yunguensis sp. nov. (PT, female) [FMNH ©]. Scale bar: 5 mm.

Figure 5. Konradus actinus (Bernhauer): A male sternum 8; B sternum 9; C female tergum 8; D female tergum 10. Konradus trescrucensis sp. nov.: E sternum 9. Konradus cuscensis sp. nov: F male tergum 8; G sternum 9; H male tergum 10; I gonocoxites of female genital segment; J accessory sclerite. Yuracarus napoensis sp. nov.: K male sternum 8; L sternum 9. Yuracarus yunguensis sp. nov.: M sternum 9; N male tergum 10; O gonocoxites of female genital segment; P female tergum 10. Yuracarus cosnipatensis: Q female tergum 8. Yuracarus diamantinus (Bernhauer): R female tergum 10; S gonocoxites of female genital segment; T accessory sclerite. Scale bars: 0.5 mm (A – I, K – S); 0.2 mm (J, T).

Figure 6. Aedeagus, dorsal and lateral views: A Konradus actinus (Bernhauer), B Konradus cuscensis sp. nov., C Konradus trescrucensis sp. nov., D Yuracarus diamantinus (Bernhauer), E Yuracarus yunguensis sp. nov., F Yuracarus cosnipatensis sp. nov., G Yuracarus napoensis sp. nov. Scale bars: 0.5 mm.

Figure 7. Distribution map for the species of Konradus Chani-Posse & Ramírez-Salamanca and Yuracarus gen. nov.

Figure 8. Phylogenetic reconstructions indicating relationships of Konradus Chani-Posse & Ramírez-Salamanca and Yuracarus gen. nov. within the Andean clade: A most parsimonious tree with black circles as exclusive (non-homoplastic) synapomorphies and white circles as non-exclusive (homoplastic) synapomorphies. Numbers in bold below the branches are absolute Bremer support values; B maximum Likelihood tree with support values SH-aLRT / UFB; C fifty percent majority consensus tree with posterior probabilities.

Figure 9. Habitat of Yuracarus cosnipatensis sp. nov.: Peru, Cuzco, Cosñipata, Estación Biológica Wayqecha, 2837–2931 m. A Panoramic view of the cloud forest of the Cosñipata Valley; B Canopy trail; C, D Sifting of leaf litter along the Canopy trail.