Loncovilius barclayi, Reyes-Hernández & Hansen & Shaw & Solodovnikov, 2024

Reyes-Hernández, José L., Hansen, Aslak Kappel, Shaw, Josh Jenkins & Solodovnikov, Alexey, 2024, Phylogeny-based taxonomic revision and niche modelling of the rove beetle genus Loncovilius Germain, 1903 (Coleoptera: Staphylinidae: Staphylininae), Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 202 (1), pp. 1-42 : 33-34

Loncovilius barclayi sp.nov.

( Figs 6D, 11D–F, 12H, 13H, 14D)

Zoobank registration: urn:lsid:zoobank.org:act:B426E064-0842-4911-A48A-C7A73A73B5E0 .

Type material. Holotype: male, pinned, with genitalia in a separate microvial, with labels as follows: CHILE: Valdivia : Purulón [-39.47, -72.69], 10.I.1986 L.E. Peña, leg. FIELD MUS. NAT. HIST./ ♂ / FMNH-INS 0000 023 665 / HOLOTYPE Loncovilius barclayi des. Reyes-Hernández, Hansen, Jenkins Shaw et Solodovnikov 2022. Deposited at FMNH. Paratypes: CHILE: Valdivia: Purulón [-39.47, -72.69], 10.I.1986 L. E. Peña, leg. FIELD MUS. NAT. HIST./ ♂ / FMNH-INS 0000 023 667 / Loncovilius barclayi J. L. Reyes-Hernández [1♀ FMNH]; CHILE: Valdivia: Purulón [-39.47, -72.69], 10.I.1986 L. E. Peña, leg. FIELD MUS. NAT. HIST./ ♂ / FMNH-INS 0000 023 666 / Loncovilius barclayi J. L. Reyes-Hernández [1♂ NHM ex. FMNH]; Nahuelbuta IX Region-Chile , 20-I-1993, Coll. T Curkovic / Loncovilius? semiflavus det. Newton 2000 [1♂]; [ CHILE:] COLL. CERDA MNHN CHILE/ Nahuelbuta Parque [-37.80, -73.01] 22.1.1981. P. [illegible] B/Santiago Mus [ MNNC 1♂] ; CHILE, IX r., 25-31.i.2005, P.N. Nahuelbula [Araucanía, Nahuelbuta National Park ] 37°48 ʹ 530 73°00 ʹ 954 [-37.80, -73.01], 1200 m, Sv Bíly lgt./ NHMD 916914 [1♂ NMPC]; [ CHILE: no exact location] col. Fairmaire /1251/ Quedius semiflavus n.sp. / FMNH-INS 0000 024 190 [1♂ MNNC ex. FMNH]. All paratypes with label: PARATYPE Loncovilius barclayi des. Reyes-Hernández, Hansen, Jenkins Shaw et Solodovnikov 2022.

Diagnosis: Elytra yellow or yellowish-brown with black marks around mesoscutellum and on suture. Male tergite X trilobed ( Fig. 12H); female tergite X deeply emarginate medio-apically ( Fig. 13H). Aedeagus as in Figure 11D–F.

Description: Measurements ♂ [min–max (average); N = 6]: FBL = 2.42–3.86 (3.56); TL = 7.13–7.5 (7.32); HW = 0.9– 0.98 (0.95); HL = 0.9–0.98 (0.95); HW/HL = 0.99–1.03 (1); PW = 1.19–1.31 (1.25); PL = 1.25–1.3 (1.28); PW/ PL = 0.93–1.02 (0.98); EW = 1.54–1.75 (1.64); EL = 1.45– 1.65 (1.56); PW/HW = 1.28–1.34 (1.31).

Measurements ♀ (N = 1): FBL = 4.03; TL = 7.5; HW = 1.05; HL = 1; HW/HL = 1.05; PW = 1.38; PL = 1.38; PW/PL = 1; EW = 1.7; EL = 1.65; PW/HW = 1.31.

Head and pronotum yellow-orange; antennae, mouthparts, and legs yellow or yellowish-brown; elytra yellow or yellowish-brown with dark mark around mesoscutellum and on suture; meso- and metasternum, all coxae, femora and abdomen dark reddish-brown; abdominal tergites and sternites with pale posterior margin.

Head from slightly wider than long, to slightly longer than wide; dorsally and ventrally glossy with few micropunctures and very fine microsculpture of transverse waves, without coarse non-setiferous punctures; posterior angles indistinct with sparse setiferous punctures of medium and small-size. Eyes medium size (EYL/HL = x = 0.52), from 1.4 to 1.55 times longer than length of temples (in lateral view); distance between eyes about equal to length of eye. Antennomeres 2 and 3 subequal in length; antennomeres 4 to 6 subequal in length; antennomeres 6 to 10 gradually reduced in length; a11 1.75 to 1.88 times as long as a 10 in males and 1.69 in females. Basal and parocular punctures usually single; posterior frontal puncture located anterior to temporal puncture; ventral basal ridge more or less straight in checkmark shape, almost united with gular sutures; postgenal ridge reduced; postmandibular ridge reaching close to eye margin; PMP greatly reduced; nuchal ridge present only laterally, fused with infraorbital ridge; gular sutures moderately separated. Mandibles without dorsolateral groove; labrum with trapezoidal sclerotized region and entire apical margin; mentum with seta alpha only; penultimate labial palpomere only weakly dilated apicad, subequal in width with more or less subconical apical palpomere.

Pronotum about as wide as long, strongly convex, evenly curved, with two PPDS, without APP, with one SLSP; flexible postcoxal hypomeral extension (or process) not interrupted by inferior line. Elytra evenly punctate, interspaces from about as long as, to two or four times as long as, diameter of punctures. Mesosternum with four macrosetae arranged in a row medially.

Protibiae not sexually dimorphic, without laterodorsal row of thick spines in both sexes. In males, mesotarsomeres 1–4 with pale adhesive setae, mesotarsomeres 1–3 with terminal plate. In females, mesotarsomeres 2–4with pale adhesive setae without terminal plate. In both sexes, metatarsomeres 2–4 with pale adhesive setae, without terminal plate; metatarsomere 1 shorter than 5, metatarsomere 4 ventrally with apical margin straight or slightly sinuate.

Abdominal tergites III and IV with only a few rows of coarse punctures of moderate density, with large impunctate area; tergite VIII distinctly emarginate medio-apically. Sternite III with basal transverse carina descending medially at a sharp point; lateral tergal sclerites IX not dorsoventrally or laterally flattened. Male sternite VIII with strong, V-shaped emargination medially ( Fig. 14H); female sternite VIII with weak apical medial emargination; male sternite IX not emarginate medio-apically, its basal portion distinctly longer than distal portion; male tergite X trilobed ( Fig. 12H); female tergite X deeply emarginate medio-apically ( Fig. 13H); ovipositor, its second gonocoxite with one macroseta medially ( Fig 9G).

Aedeagus as in Figure 11D–F, its length ~ 1.46; median lobe rod-like, in parameral view apex deeply emarginate; internal sac with pair of long I-shaped copulatory sclerites. Paramere slightly produced over apex of median lobe, wider than median lobe, its sides converging into a deeply emarginate apex, with dark peg setae, in lateral view almost straight and slightly concave apically.

Etymology: The species epithet is a patronym in recognition of Maxwell V.L.Barclay, in particular for his earlier mentoring of J.J.S..

Distribution and habitat: Loncovilius barclayi is known only from Chile, from the Araucanía and Los Ríos regions, in the north-central portion of the Valdivian temperate forest ecoregion. It is unknown how it was collected.