Yuracarus, Chani-Posse & Rodríguez-Melgarejo & Ramírez-Salamanca, 2025
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https://doi.org/10.3897/asp.83.e150304 |
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publication LSID |
lsid:zoobank.org:pub:4DE64D12-8127-4F6C-95C0-14CD6FFF21E5 |
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DOI |
https://doi.org/10.5281/zenodo.16280361 |
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https://treatment.plazi.org/id/1F4A7E60-28DF-5732-BF88-23775ACDBA89 |
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scientific name |
Yuracarus |
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gen. nov. |
Genus Yuracarus gen. n.
Figures 1 C, D View Figure 1 , 2 D – F View Figure 2 , 3 A – D, F View Figure 3 , 4 C View Figure 4 , 5 K – T View Figure 5 , 6 D – G View Figure 6 , 7 View Figure 7 , 8 View Figure 8 , 9 View Figure 9
Species composition (four species):
Yuracarus cosnipatensis sp. nov. ( Peru); Yuracarus diamantinus (Bernhauer) comb. nov. ( Bolivia); Yuracarus napoensis sp. nov. ( Ecuador); Yuracarus yunguensis sp. nov. ( Bolivia, Peru)
Type species.
Philonthus diamantinus Bernhauer, 1917 , here designated.
Diagnosis.
The most distinctive characters of Yuracarus are its slender body shape, as well as its predominantly metallic-colored habitus (excluding the abdomen), in addition to the profemur distinctly angulate medially, the protarsomeres 1–4 enlarged, sub-bilobed, and rather flattened, with a patch of striate and petiolate discal setae, also present on the meso- and metatarsomeres, although less distinct due to the meso- and metatarsomeres being distinctly narrower than the protarsomeres, as well as the hind margin of tergum 8 truncate and angulate medially in both sexes. In addition to these characters, it differs from other Neotropical genera with enlarged protarsomeres and discal setae currently known (i. e., Delgadobius , Konradus , Inesius , Rhaegalius and Atopocentrum ) by the gular sutures being joined anteriorly, whereas in Delgadobius , Konradus , Inesius , and Rhaegalius , the gular sutures are either joined posteriorly ( Konradus , Inesius , Rhaegalius and Atopocentrum ) or not joined ( Delgadobius ).
Description.
Length 8.8–10.7 mm. Body elongate, more or less parallel sided, slightly widening toward elytra and tapering toward sixth visible abdominal segment, scarcely punctate (Fig. 1 D View Figure 1 ). — Colouration: Head, thorax and elytra of metallic colour, abdomen shiny black to piceous-black; antennae, palpi and legs piceous to piceous-black. — Head: subrectangular shape with distinct hind angles (Figs 1 D View Figure 1 , 2 D – F View Figure 2 ); about as long as to moderately longer than wide, as wide as to slightly narrower than pronotum at widest point; infraorbital ridge present, slightly extending beyond postgenal ridge; postgenal and ventral basal ridges present, well developed; postmandibular ridge present (Fig. 3 A View Figure 3 ); epicranium with two pairs of interocular punctures, one medial puncture between interocular punctures; tempora with three to four postocular punctures arranged in line at each side; dorsal and ventral surface of head with distinctly sparse, fine punctuation and dense, wave-like microsculpture. Gular sutures joined anteriorly before neck (Fig. 3 A View Figure 3 ). Eyes distinctly convex, moderately to distinctly shorter than temples seen from above. Antennae inserted closer to anterior margin of frontoclypeus than to eyes, separated from each other by at least 3.0 × distance to eye, first antennomere less than one third of head length and distinctly shorter than antennomeres second and third combined, antennomere third slightly to distinctly longer than second, first three segments with rather scarce long setae, pubescence starting on segment fourth. Maxillary palpus with fourth palpomere longer than third (Fig. 3 A View Figure 3 ). Labrum subtriangular, distinctly emarginate and completely sclerotized with numerous and long macrosetae at apical margin. Mentum with anterior margin slightly emarginate and about as long as submentum (Fig. 3 A View Figure 3 ). Labial palpus moderately long, second palpomere about twice as long as first, third fusiform and distinctly longer than second (Fig. 3 A View Figure 3 ). — Thorax: Pronotum subcylindrical, slightly to distinctly longer than wide, parallel-sided, slightly constricted before reaching posterior angles (Fig. 4 C View Figure 4 ); front margin subtruncate, hind margin arcuate, anterior obtusely rounded, posterior angles obtuse; lateral puncture of pronotum bearing long macroseta separated from superior line of pronotal hypomeron by distance no more than 3.0 × as large as diameter of puncture; disc with dorsal rows of punctures sub-parallel to each other. Prosternum glabrous, without distinct mid-longitudinal carina; basisternum longer than furcasternum, with a rudimentary transverse carina (Fig. 3 A View Figure 3 ). Mesoventrite somewhat elongate, with sternopleural suture distinctly oblique; mesoventral intercoxal process narrowly pointed forming sharp (subacute) angle and intercoxal ridge straight (Fig. 3 B View Figure 3 ). — Legs: Profemora enlarged and rather flattened, angulate medially, with scarce setae (Fig. 3 D View Figure 3 ); protibiae setose, with 1–2 medio-apical spines; protarsi with first four segments subequal in length, moderately (female) to distinctly (male) widened and sub-bilobed apically, flattened dorsoventrally, ventral surface with both discal and marginal striate setae, discal setae striate and petiolate, forming a patch (Fig. 3 C, D, F View Figure 3 ); meso- and metatibiae distinctly spinose; meso- and metatarsomeres narrower than protarsomeres, discal setae present. — Elytra: at sides longer than pronotum at midline; punctuation fine and sparse (Figs 1 D View Figure 1 , 2 D – F View Figure 2 ). — Abdomen: Terga 3–6 with both anterior and posterior basal transverse carinae complete and straight (Figs 2 E, F View Figure 2 ). Hind margin of tergum 8 truncate and angulate medially in both sexes. — Male sexual characters: Sternum 8 emarginate medio-apically (Fig. 5 K View Figure 5 ). Genital segment with lateral tergal sclerites 9 (styli) elongate and subcylindrical; tergum 10 truncate at apex with 3–4 apical setae and two subapical setae (Fig. 5 N View Figure 5 ); sternum 9 with basal portion asymmetrical, distinctly shorter than distal portion and emarginate apically, distinctly setose at each side of emargination (Fig. 5 L, M View Figure 5 ). Aedeagus with parameres fused as one short sclerite, completely fused to median lobe and without sensory peg setae; median lobe elongate, with apical part variably shaped (Fig. 6 D – G View Figure 6 ). — Female sexual characters: Sternum 8 with hind margin straight; tergum 10 truncate to arcuate at apex with 4–6 apical setae (Fig. 5 P, R View Figure 5 ); second gonocoxites each with a long macroseta basally, with minute stylus (Fig. 5 O, S View Figure 5 ) bearing one long macroseta and one distinctly short and fine seta. Accessory sclerite absent, or if present, horseshoe-shaped. — Immature stages: Unknown.
Distribution.
Yuracarus is currently known from the Tropical Andes of Ecuador, Peru and Bolivia (Fig. 7 View Figure 7 ), at altitudes ranging from 2800 to 4100 meters.
Etymology.
Yuracarus is a masculine, Latinized generic name derived from Yuracaris, the type locality of this new genus. The root “Yura-” is combined with the Latin suffix “-carus”, denoting its association with the locality.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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