Amara (Tibetamara) validula Tschitschérine, 1898

Makarov, Kirill V. & Sundukov, Yurii N., 2021, A new subgenus of the genus Amara Bonelli, 1810 (Coleoptera: Carabidae) from northeastern Tibet, China, Zootaxa 5057 (2), pp. 228-240 : 236-238

Amara (Tibetamara) validula Tschitschérine, 1898

( Figs 1 –17)

Amara validula Tschitschérine, 1898: 214–217 . Type locality: “Nord-Est du Thibet, plateau d’Amdo: riv. Namyngug (col élevé de 12.000 pieds, entre le village Schoen-pyn et le monastère Labran); village Ndàmi; monastère Gumbum; lac Kuku-nor”, Qinghai, China.

Amara (Bradytus) breiti Baliani, 1940: 215 . Type locality: “ Tibet: Kuku-nor, 3200 m ”, Qinghai, China; synonymy by Hieke, 1975: 288.

Type material. Lectotype (designated herewith): ♂, “Kan-ssu 1886 G. Patanin.” [white rectangle with a black frame; printed]; “N. E. du Thibet., Plateau d’Amdo. G. Potanin’. 7.IV.86.” [white rectangle on a checkered notebook sheet; handwritten]; “ A. validula typ. m. Tschitscherin det.” [white rectangle; handwritten]; “Typ.?” [red rectangle; handwritten]; “1907. к. Чичерина” [two white rectangles; printed]; red rectangle (printed) “ LECTOTYPUS Amara validula Tschitschérine, 1898 design. K. Makarov et Yu. Sundukov, 2021 ”; “ Amara (Tibetamara) validula Tschitschérine, 1898 det. K. Makarov et Yu. Sundukov, 2021 ”.

Paralectotypes (designated herewith): ♀, “Kan-ssu 1886 G. Patanin.” [white rectangle with a black frame; printed]; “N. E. du Thibet., Plateau d’Amdo. G. Potanin’. 7.IV.86.” [white rectangle on a checkered notebook sheet; handwritten]; “ A. validula typ. m. Tschitscherin det” [white rectangle; handwritten]; “Typ.” [red rectangle; handwritten]; “ Amara (Brad.) validula Tschit. det. Hieke 1990 ” [white rectangle; handwritten]; red rectangle (printed) “ PARALECTOTYPUS Amara validula Tschitschérine, 1898 design. K. Makarov et Yu. Sundukov, 2021 ”; “ Amara (Tibetamara) validula Tschitschérine, 1898 det. K. Makarov et Yu. Sundukov, 2021 ”. ♂, “Kan-ssu 1885 G. Patanin.” [white rectangle with a black frame; printed]; “N. E. du Thibet., Plateau d’Amdo. G. Potanin. 15.V.85.” [white rectangle on a checkered notebook sheet; handwritten]; “ A. validula typ. m. Tschitscherin det” [white rectangle; handwritten]; “Typ.” [red rectangle; handwritten]; red rectangle (printed) “ PARALECTOTYPUS Amara validula Tschitschérine, 1898 design. K. Makarov et Yu. Sundukov, 2021 ”; “ Amara (Tibetamara) validula Tschitschérine, 1898 det. K. Makarov et Yu. Sundukov, 2021 ”.

Other material. ♂, “Kan-ssu 1885 G. Patanin.” [white rectangle with a black frame; printed]; “ Amara (Brad.) validula Tschit. det. Hieke 1990 ” [white rectangle; handwritten]; “ Amara (Tibetamara) validula Tschitschérine, 1898 det. K. Makarov et Yu. Sundukov, 2021 ”; ♀, “Kan-ssu 1885 G. Patanin.” [white rectangle with a black frame; printed]; “ Amara sp. Al.” [white rectangle; handwritten]; “ Am. validula T. Tschit. ” [white rectangle; handwritten]; “ Amara (Tibetamara) validula Tschitschérine, 1898 det. K. Makarov et Yu. Sundukov, 2021 ”; ♂, “Kan-ssu 1885 G. Patanin.” [white rectangle with a black frame; printed]; “ Amara (Tibetamara) validula Tschitschérine, 1898 det. K. Makarov et Yu. Sundukov, 2021 ”; ♂, “Kan-ssu 1885 G. Patanin.” [white rectangle with a black frame; printed]; “ Amara (Tibetamara) validula Tschitschérine, 1898 det. K. Makarov et Yu. Sundukov, 2021 ”; mouthparts, “ A. validula typ. m. Tschitscherin det” [white rectangle with a black frame; printed]; “Typ.?” [red rectangle; handwritten]; “ Amara (Tibetamara) validula Tschitschérine, 1898 det. K. Makarov et Yu. Sundukov, 2021 ”.

Notes on the type material. Amara validula was originally described based on 2 males and 2 females from the Tschitschérine Collection ( ZIN) and 1 female from the Koltze Collection (Leibniz Centre for Agricultural Landscape Research, Müncheberg, Germany) ( Tschitschérine 1898: 216; Hieke 1975: 289). There are 7 specimens labeled “Kan-ssu 1885 G. Patanin” and 1 plate with glued oral organs (right maxilla and labium) which Tschitschérine labeled as “ A. validula typ. m.”, all in the ZIN collection.Among the syntypes, we selected 2 males and 1 female, the geographical and identification labels of which fully correspond to the first description ( Figs 18–20 ) and are written by Tschitschérine’s hand. Perhaps the plate with glued oral organs and labeled by Tschitschérine as “ A. validula typ. m. Tschitscherin det” is also part of the type series and represents the missing female from “village Ndami, G. Potanin! 21.V.1885 (coll. Tschitschérine)” ( Tschitschérine 1898: 216). Due to the lack of a geographical label and the inability to determine the sex of the beetle, we did not include this specimen in the type series. As the remaining 4 specimens have no labels provided by Tschitschérine’s hand, nor any was labeled by him later, they were not considered as syntypes.

Diagnosis. Body ( Figs 1 , 15) robust ((PL+EL)/PW = 2.16–2.23; M 2.19); dark brown or almost black; antennae light red or red; legs dark red completely or only tarsi red. Dorsal side glossy, without microsculpture in both sexes.

Head ( Figs 1 , 15) large, finely punctate, with rather long mandibles; mentum tooth bifid ( Fig. 3 ); submentum with one seta on each side ( Fig. 3 ).

Pronotum ( Figs 1 , 15) slightly trapezoidal (PB/PA = 1.27–1.45; M 1.39), 1.51–1.62 (M 1.57) times wider than long at median line, with greatest width slightly posterior to middle; anterior angles not protruding; lateral margin relatively narrow all along or slightly expanding in apical half; lateral sides in front of posterior angles slightly concave or rectilinear; posterior angles rectilinear or slightly obtuse, with a large sharp tooth; base slightly undulating; outer folds at basal foveae strongly diverging basad, reaching the basal margin mesal to posterior seta; basal foveae wide and deep, separated by a faint convexity; punctures everywhere large, dense at base and in front, sparse on lateral sides; outer folds at basal foveae not punctate or with separate punctures. Prothorax ventrally completely, rather densely and coarsely punctate ( Figs 5, 6 ); prosternal intercoxal process truncate, unmarginated and rather densely punctate ( Fig. 6 ).

Elytra ( Figs 1, 2 , 15) relatively short (EL/EW = 1.30–1.37; M 1.33), their lateral sides almost parallel; striae deep, finely punctate; bases of striae 1 and 2 separate, a shortened stria located in 1 st or 2 nd interval; one preapical puncture on top of stria 7; series umbilicata consisting of 12–13 setae: 5 in humeral group, 5–6 in middle, and 2 at apex ( Fig. 2 ); intervals impunctate.

Ventral sides of meso- and metasterna densely and coarsely punctate.

Abdomen: abdominal sternites III–V each with one pair of setae; sternites I–II laterally densely and coarsely punctate; middle of sternite II, lateral sides of sternites III–V, and anal sternite sparsely and finely punctate; anal abdominal sternite with 2 (2 specimens) or 4 (2 specimens) setae in males and 4 setae in females (Fig. 16).

Legs: external top corner of front tibia moderately protruding (Fig. 10); mesotibia at apex markedly widened from outside; tarsomere 5 ventrally with long and thin setae, reaching approximately 1/2 length of claw; dorsal side of protibia with 4–6 setae (Fig. 10); male front legs moderately expanded (Fig. 10); 2 setae at ventral margin of mesofemur ( Fig. 6 ); posterior coxa with 2 setae ( Fig. 6 ).

Aedeagus (Figs 7–9): median lobe rather slightly curved, with a massive basal part, without groove on right side (in many of Hieke’s articles, this fold is indicated as being on the left side); lamella long, narrow, tapering towards apex; endophallus without visible sclerotized structures; right paramere robust, short (roughly equal to length of left paramere), without apical hook.

Female genitalia with broadly oval gonostyli (Fig. 17).

Standard measurements (in mm). HW = 2.53–2.80 (M 2.63); HL = 1.15–1.45 (M 1.26); PA = 2.60–2.83 (M 2.69); PW = 3.85–4.30 (M 4.06); PB = 3.55–3.90 (M 3.73); PLt = 2.58–2.75 (M 2.65); PLm = 2.45–2.70 (M 2.59); EW = 4.55–5.05 (M 4.73); EL = 6.05–6.65 (M 6.29); Ls = 9.75–10.75 (M 10.14); L = 10.1–11.1 (M 10.6).

Sexual dimorphism. Males differ from females by forelegs moderately expanded with adhesive soles (Fig. 10), their mesotibia medially with a number of small tubercles (Fig. 11), metatibia medially with one additional row of rather long setae in apical third (Fig. 12).

Distribution. China: Gansu, Qinghai, Sichuan,? Hebei,? Jiangsu,? Zhejiang;? North Korea ( Hieke 2003a, 2017).

Comments. We have failed to find any information in the literature concerning A. validula records in the eastern provinces of China and in Korea, as indicated in the 1 st and 2 nd editions of Catalogue of Palaearctic Coleoptera ( Hieke 2003a, 2017). Perhaps the distribution of this species is restricted to northeastern Tibet.

Figures

FIGURES 1–6. Amara (Tibetamara) validula Tschitschérine, 1898, male, lectotype: 1—habitus, dorsal view, 2—habitus, dorsolateral view, 3—head, ventral view, 4—labial palpomeres, 5—prothorax, lateral view, 6—habitus, ventral view.

FIGURES 18–20. Labels of the lectotype (18) and paralectotypes (19–20).