Lucanus collardi, Sato & Ngoc & Zilioli, 2024

Lucanus collardi View in CoL sp.n. ( Fig. 2 View Fig a-d)

urn:lsid:zoobank.org:pub:D3BD5AF4-9D2F-47EB-A9D1-15CAC0C6F075

Type material

Holotype ♂: VIETNAM, Nghe An Province, Ki Son , 1500 m a.s.l., VII/2023, local collectors leg. ( MSNM).

Paratypes. 2 ♂♂, same locality as the holotype ( MZC) ; 1♀, same locality as the holotype ( MZC) ; 1 ♂, LAOS, Xieng Khouang Province, Phu SamSoum , 2300 m a.s.l., 15.X.2023, Steeve Collard leg. ( JSC) .

Description. Male Holotype ( Fig. 2a View Fig ). Length, including mandibles: 48.6 mm. Length without mandibles: 31.1 mm. Maximum head width, excluding mandibles: 13.7 mm.

Body slender, mainly reddish brown, densely and finely punctate throughout, covered with appressed, moderately long yellowish pubescence. Antenna and palpi black. Elytra reddish brown, black along the suture and lateral edges. Legs with tarsi and coxae dark castaneous brown to black; femora and tibiae ferruginous with black margins.

Head. Transverse (W/L: 1.63), matt, punctate-granulate, covered by a dense yellowish appressed pubescence. Frons subtrapezoidal, slightly concave, fused with the clypeolabrum. Clypeolabrum subpentagonal, with a prominent narrowly pointed apex and fringed with yellowish hairs; clypeal ridge obsolete medially, laterally projecting as two very small blunt teeth. Frontal ridge bisinuate, distinctly raised medially. Lateral cephalic ridges strongly sinuate, with rounded, apically raised posterior lobes. Head with projecting antero-lateral corners, whose lateral margins are dorsally produced as a strong, slightly backward directed tooth. Ocular canthus shorter than half eye’s diameter. Mandibles long and slender, about 3.5 times as long as the head, strongly curved basally, then almost straight up to their slightly curved apex; surface, especially basally, granulate-puntate and covered with yellowish appressed pubescence, which is denser and much longer proximally and becomes sparser and very short apically. Median tooth strong, triangular, sharp, hardly tilted backwards and upwards, placed a little before the midlength. Inner mandibular margin with 6 (right) and 7 (left) proximal and 5 (right) and 7 (left) distal denticles, some of which are just little visible bumps. Upper apical tooth bent upwards, with a feebly marked dorsolateral carina; lower apical tooth shorter, conical, slightly downward directed.

Antennal club 6-jointed with scattered short setae; joints 6-10 with a long lamella; joint 5 with a shorter and thinner one. Lamellae covered with dense, short, raised pubescence (lamella of joint 5 pubescent only anteriorly). Mentum wide, trapezoidal, matt, finely and irregularly granulate, covered with long dense yellowish pubescence; anterior margin medially downward bent, convex and with broadly rounded lateral corners.

Thorax. Pronotum transverse (W/L: 1.80), matt, finely granulate-punctate, covered with moderately dense, appressed yellowish pubescence; anterior margin bisinuate, widely and weakly convex medially; anterior angles sharp and feebly directed forwards. Lateral margins strongly convex behind their midlength. Posterior margin weakly bisinuate, posterior corners as obtuse angles. Median longitudinal depression hardly visible, anteriorly more developed. Prosternal apophysis strong, prominent, forming a blunt right angle inside view, laterally covered with yellowish pubescence. Scutellum transverse, rounded, slightly pointed posteriorly, finely punctate and granulate except its margins that are superficially reticulate, covered with appressed yellowish pubescence.

Elytra finely and densely punctate throughout, superficially microreticulate, covered with sparse (because mostly abraded) yellowish pubescence. Shoulders forming slight, rounded obtuse angles. Legs slender, femora fairly shining, sparsely punctate with a superficial ground reticulation, and with sparse, short yellowish pubescence, even shorter on protibiae. Protibia with three spines on its outer edge, apex sharply bifurcated, mesotibia with three spines increasing in size from base to apex, metatibia with two weak lateral teeth, the proximal hardly visible.

Aedeagus ( Fig. 3 View Fig a-d) in dorsal view about 2.5 times longer than wide. Basal piece elongate, in lateral view thin in the feebly upturned basal part, about 1.6 times as long as parameres, without sclerotized dorsal plates; in ventral view apex of basal piece membranous. Paramere with small basal process; in lateral view feebly curved, apically slightly protruding. Penis slender, with subparallel lateral margins, distinctly shorter than parameres. Flagellum about 2.3 times as long as parameres and 0.8 times as long as aedeagus, apically widened. Two long, slender struts run almost throughout the entire length of basal piece, from base to articulation of penis, feebly enlarged on their distal third.

Description

Female Paratype: ( Fig. 2d View Fig ). Length, including mandibles: 28.1 mm. Length, without mandibles: 25.2 mm. Maximum head width: 7 mm.

Body slender; shining, blackish brown. Antennae and palpi black, mandibles black. Elytra dark reddish brown with suture and lateral edges black; femora ferruginous with base, apex and longitudinal stripe along both edges black, protibiae black with a small ferruginous apicodeorsal spot, meso and metatibiae with a median longitudinal ferruginous streak.

Head. Transverse (W/L 1.70), lacunose-foveate-punctate, covered with sparse and yellow short pubescence; frontal ridge concave. Frons punctate, tilted forwards and fused with clypeolabrum, well defined by a transverse suture. Clypeolabrum trapezoidal, short with weakly convex lateral edges and anterior corners hardly protruding as blunt teeth. Head with blunt anterior angles, backward produced into stout, punctate canthi, as long as less than half eye diameter. Eyes globular; temple short, not prominent. Mandibles short, asymmetrical, evenly curved from base to the apical tooth, dorsally grooved. Besides the apical tooth, mandibles edentate with a straight (right mandible) or weakly concave (left one), continuous masticatory margin; left mandible with a preapical indentation. External surface irregularly punctate with sparse, appressed yellow pubescence; inner one basally lacunose-foveate to distally punctate, with sparse standing hairs; masticatory edge with an ill-defined sculpturation, partially shining. Antenna with a weakly curved scape and a club formed by joints 5-10. Mentum trapezoidal, widely anterolaterally rounded, areolate, covered with sparse, long yellowish hairs. Submentum sparsely punctate, with irregular ground microsculpture, covered with sparse, mostly appressed long hairs.

Thorax. Pronotum transverse (W/L 1.64), its anterior margin distictly bisinuate, medially weakly convex and with blunt protruding anterior angles. Lateral margins anteriorly weakly convex to the postmedian angles, then almost straight and markedly convergent backwards, feebly sinuate just before the obtuse posterior corners. Posterior pronotal margin slightly bisinuate. Pronotal surface punctate, medially glabrous (because of abraded pilosity), laterally with appressed, short yellowish hairs; punctuation gradually stronger towards sides. Prosternal process distinctly prominent, blunt angled, laterally covered with yellowish pubescence. Scutellum ogival, faintly microreticulate, irregularly punctate and covered with sparse long yellowish hairs.

Elytra shining, with sublateral shallow concavities; shoulders bluntly angulate, lateral edge grooved and moderately convex from base to apex, sutural angles rounded. Elytral surface densely and finely punctate, covered with appressed yellowish pubescence, longer at sides. Protibia flattened and apically widened with two robust, sharp apical teeth and three triangular lateral ones, the apicalmost being the largest, the second smaller and the basalmost hardly distinct; mesotibia with three sharp preapical teeth, hind tibia with two preapical teeth.

Female genitalia. Hemisternite ( Fig. 4 View Fig ) elongate, moderately wide, slightly rounded apically, with long yellowish setae; inner lateral margin of sclerotized part short. Spermatheca sclerotized, J-shaped, proximally slender and slightly curved inwards. Spermathecal duct long, about 3.6 times as long as spermatheca (N.B. spermathecal gland lost during extraction). Central conjunction of 9 th tergite protruding medially and roundly narrowed at tip.

Paratype males. Consistent with the holotype except for the usual allometric differences. Small males with mandibles less curved and denticulated.