Algon daweishanus, Li & Tang, 2023

Li, Chong & Tang, Liang, 2023, New species and records of Algonina Schillhammer & Brunke, 2018, mainly from China, Zootaxa 5256 (5), pp. 457-482 : 464-466

Algon daweishanus sp. n. kUƜŴÑḃffm

( Figs 24–26 , 84–89)

Type material. Holotype. China: Yunnan: ♁, glued on a card with labels as follows: “ China: Yunnan Prov. , Hong-He Pre., Ping-Bian County, Daweishan , mixed forest, leaf litter, wood, sifted. 2000 m, 25.V.2012, Peng & Yin leg. ( SHNU) [red handwritten label]” ( SHNU) . Paratypes. 2♁♁, same data as holotype ( SHNU) .

Description. (Habitus: Figs 24–26 ) Body 17.1–17.4 mm long (8.7–8.8 mm, abdomen excluded). Black, rather dull; palpi dark reddish brown, antennae dark reddish with basal three segments brown, gradually becoming paler distally, tarsi dark brown proximally, gradually becoming paler reddish distally.

Head subquadrangular, weakly convex at sides, 1.1 times as wide as long, eyes very small, tempora 1.6 times as long as eyes; sparsely punctate, dorsal surface with fine reticulate microsculpture (Type I), with 3 or 4 large punctures arranged in an oblique row from medio-apical margin of eye to medio-basal portion of head; an area from supra-orbital margin through postogenae to the basal angles with large setiferous punctures. Antennae long, with each segment conspicuously oblong.

Pronotum ( Fig. 26 ) almost as wide as long, widest at midlength, slightly narrowed toward base, more strongly narrowed toward anterior margin; with a dorsal row of punctures varying from 2 to 4 punctures, in addition, with an inconspicuous sublateral row of indistinct punctures; microsculpture as on head. Scutellum finely and sparsely punctate and with fine setae. Elytra ( Fig. 26 ) trapezoidal, transversal, lateral margin with inconspicuous emargination next to shoulders, posterio-lateral angles subtruncate; with distinct and broad depression at base, disc of elytra thus appearing semicircularly elevated around suture; surface relatively smooth, without oblique creases; entire elytra covered with regularly spaced setiferous punctures, setae as long as spaces between punctures, punctation on disc slightly sparser than along sides and base, base with a pair of conspicuous bigger setiferous punctures next to scutellum; entire elytra covered with very dense isodiametrical microsculpture (type IIIa).

Abdomen slightly wider than elytra, widest at 4th segment; tergites moderately densely but coarsely punctate and pubescent, punctures with distinctly visible, drop-shaped punctural grooves, sternites with punctures smaller than those on tergites, and grooves also smaller; posterior margin of tergite VII without whitish seam.

Aedeagus ( Figs 84–89 ) large, median lobe in lateral view slender, bent toward paramere, apical piece long and sharp, with distinct subapical tooth; paramere slender, parallel-sided in apical half, apex subtruncate, exceeding level of apical tooth but not reaching apex of median lobe ( Fig. 50 ), with several setae of various length at the apex, without peg-setae ( Fig. 51 ).

Distribution. China (Yunnan).

Diagnosis. This is the largest species in the A. kaiserianus species group, and the aedeagus of the species is also the largest in this species group. The geographically closest species is A. fansipanicus Assing, 2015 from northern Vietnam, which differs from A. daweishanus sp. n. in the relatively parallel lateral margin and different punctation. The only species sharing the character of fully setose elytra is A. hubeiensis Schillhammer, 2006 , which differs in its smaller body size and the more arcuate margin of the elytra, and also the smaller aedeagus without subapical tooth. The trapezoidal elytra more resemble those of A. kaiserianus and A. tronqueti Schillhammer, 2006 , however, the elytra of the latter two have a broad glabrous area ( Figs 13–15 ).

Etymology. The species is named after the type locality in southern Yunnan.

Figures

FIGURES 21–26. 21–23—Algon kuankuoshuiensis; 24–26—A. daweishanus; 21, 22, 24, 25—habitus; 23, 26—pronotum and elytra (right side).

FIGURES 78–89. Aedeagal characters. 78–83—Algon kuankuoshuiensis; 84–89—A. daweishanus; 78, 79, 84, 85—aedeagus in lateral view; 80, 81, 86, 87—aedeagus in ventral view; 82, 83, 88, 89—inner side of apical parameral portion.

FIGURES 43–50. 43–45—Barypalpus chinensis; 46–48—B. maoershanus; 49, 50—Rientis sp.; 45, 48—left elytra.

FIGURES 51–59. Aedeagal characters. 51–53—Algon sphaericollis; 54, 55—A. atronitidus; 56, 57—A. atroviridis; 58, 59—A. fukienensis; 51, 54, 56, 58—aedeagus in ventral view; 52, 55, 57, 59—aedeagus in lateral view; 53—inner side of apical parameral portion. Scale bars: 0.5 mm.

FIGURES 7–14. Habitus. 7—Algon atroviridis; 8—A. fukienensis; 9—A. cf. pergrandis; 10—A. cf. semiaeneus; 11—A. malayanus; 12–14—A. bramlettorum. Scale bars: 3 mm.

FIGURES 15–20. 15, 18—Algon grebennikovi; 16, 19—A. reuteri; 17, 20—A. doupengshanus; 15–17—habitus; 18–20—pronotum and elytra (right side). Scale bars: 15–17—3 mm; 18–20—1 mm.