Chlaenius (Lithochlaenius) formosensis Lorenz, 1998

Valim, Ye, Kavanaugh, David H., Shi, Hongliang & Liang, Hongbin, 2011, A key to species of subgenus Lithochlaenius (Coleoptera, Carabidae, Chlaeniini, Chlaenius), with descriptions of three new species, ZooKeys 128, pp. 15-52 : 27-28

Chlaenius (Lithochlaenius) formosensis Lorenz Figs 24-25 56 70 84 101-102 125-126 158

Chlaenius noguchii formosanus Habu, 1965: 86 (nec Jedlička, 1935:5)

Chlaenius formosanus Morita, 1993:161

Chlaenius formosensis Lorenz, 1998:339 (replacement name); Kirschenhofer, 2005:491

Specimens examined.

Total 24 specimens: China: 8 males and 12 females (CCCC), "Taiwan Prov., Hsinchu, Wufeng, 1996.08.03, Chen C.C. coll."; 3 males and 1 female (CCCC), "Taiwan Prov., Hsinchu, Wufeng, 1998.4.11, Chen C.C. coll.

Diagnosis.

Antennomere 1 cylindrical ( Fig. 56 ); antennomeres 1-3 brown; intervals 1-7 convex, glabrous medially, with one row of pubescence laterally ( Fig. 84 ); apex of sternum VII rounded ( Figs 101-102 ); lamella of aedeagus slightly truncate at apex ( Fig. 125 ), thick, bent ventrally ( Fig. 126 ).

Description.

Total length = 16.0-17.0 mm (mean = 16.45), width = 5.87-6.40 mm (mean = 5.99); HW = 2.90-3.00 mm (mean = 2.96), EYL = 1.10-1.15 mm (mean = 1.12), ratio Ant3/Ant1 = 1.71-1.88 (mean = 1.76), PL/PW = 0.81-0.88 (mean = 0.85), EL/EW = 1.68-1.86 (mean = 1.76), EL/ PL = 1.32-1.48 (mean = 1.39).

Head and pronotum black, with green or coppery metallic luster; elytra black; ventral surface black; mandibles, trochanters, and tarsomeres dark brown; antennae, palpomeres, femora, and tibiae yellow to brown.

Head with vertex nearly glabrous, very sparsely punctate and pubescent near eyes; Antennomere 1 cylindrical ( Fig. 56 ); labrum slightly emarginate at apex. Pronotum with disk convex, nearly smooth, glabrous; basal foveae small, deep, finely punctate, sparsely pubescent. Elytra with intervals convex, intervals 1-7 glabrous medially, with a row of pubescence laterally near striae ( Figs 24 , 84 ), intervals 8 and 9 with decumbent pubescence throughout; striae deep, punctate; humeral angle obtuse ( Fig. 70 ). Abdominal sterna IV-VI nearly glabrous medially, densely pubescent laterally; sternum VII broadly rounded at apex in both sexes ( Figs 101-102 ). Aedeagus with lamella subtruncate at apex ( Fig. 125 ), thick and bent laterally ( Fig. 126 ).

Geographical distribution.

Fig. 158 . Known only from Taiwan.

Remarks.

Mensural data cited in the description were based on measurements obtained from 5 males and 5 females selected for maximum variation.

This species was first described as a subspecies of Chlaenius noguchii . Later, Morita (1993) upgraded it to a distinct species. However, the name Chlaenius formosanus was preoccupied by another Chlaenius species of Jedlička, and therefore Lorenz (1998) renamed it Chlaenius formosensis .

Kirschenhofer (2005: 491) considered Chlaenius formosensis Lorenz to be a junior synonym of Chlaenius formosanus Jedlička (= Chlaenius rambouseki Lutshnik, see below) with no comparison. Based on Habu"s original description (type unavailable according to Morita), named specimens of Chlaenius formosensis in Morita's collection (corresponding author and checked by HBL in 2009), and specimens in Chen Chanchin's collection, we treat Chlaenius formosensis as a distinct species. Its members differ from those of Chlaenius rambouseki in having the vertex of the head and pronotal disk glabrous (both sparsely punctate and pubescent in Chlaenius rambouseki ), intervals 1-7 glabrous medially (wholly pubescent in Chlaenius rambouseki ), and the male aedeagus stout (slender in Chlaenius rambouseki ).

Chlaenius formosensis adults are similar to those of Chlaenius noguchii in elytra pubescence, but differ from the latter in having antennomere 1 cylindrical (coniform in Chlaenius noguchii ), pronotal disk smooth (finely punctate in Chlaenius noguchii ), and male aedeagus stout (slender in Chlaenius noguchii ).

Figures

Figure 158. Map showing the known geographical distributions of Chlaenius (Lithochlaenius) spp.

Figures 22 - 27. Habitus of Chlaenius (Lithochlaenius) spp 22 Chlaenius agilis Chaudoir, holotype, dorsal view 23 Chlaenius agilis Chaudoir, holotype, ventral view 24 Chlaenius formosensis Lorenz, male, in CCCC, dorsal view 25 Chlaenius formosensis Lorenz, ventral view 26 Chlaenius leishanensis Kirschenhofer, male, in IZCAS, dorsal view 27 Chlaenius leishanensis Kirschenhofer, male, in IZCAS, ventral view. Scale line = 5.0 mm.

Figures 52 - 65. Antennomere 1 of Chlaenius (Lithochlaenius) species 52 Chlaenius chuanqianensis sp. n., holotype 53 Chlaenius linwensini sp. n., holotype 54 Chlaenius propeagilis sp. n., holotype 55 Chlaenius agilis Chaudoir, holotype 56 Chlaenius formosensis Lorenz, CCCC 57 Chlaenius leishanensis Kirschenhofer, IZCAS 58 Chlaenius noguchii Bates, IZCAS 59 Chlaenius wrasei Kirschenhofer, IZCAS 60 Chlaenius agiloides Jedlicka, IZCAS 61 Chlaenius rambouseki Lutshnik from Ussuri region, IZCAS 62 Chlaenius anchomenoides Bates, paratype 63 Chlaenius nuristanus Jedlicka, paratype 64 Chlaenius nuristanus a. rubridipes Jedlicka, paratype 65 Chlaenius rambouseki Lutshnik from Taiwan, CCCC. Scale line = 1.0 mm.

Figures 66 - 79. Humeral region of elytra of Chlaenius (Lithochlaenius) spp 66 Chlaenius chuanqianensis sp. n., holotype 67 Chlaenius linwensini sp. n., holotype 68 Chlaenius propeagilis sp. n., holotype 69 Chlaenius agilis Chaudoir, holotype 70 Chlaenius formosensis Lorenz, CCCC 71 Chlaenius leishanensis Kirschenhofer, IZCAS 72 Chlaenius noguchii Bates, IZCAS 73 Chlaenius wrasei Kirschenhofer, IZCAS 74 Chlaenius agiloides Jedlicka, IZCAS 75 Chlaenius rambouseki Lutshnik from Ussuri region, ZCAS 76 Chlaenius anchomenoides Bates, paratype 77 Chlaenius nuristanus Jedlicka, paratype 78 Chlaenius nuristanus Jedlicka, paratype 79 Chlaenius rambouseki Lutshnik from Taiwan, CCCC. Scale line = 1.0 mm.

Figures 80 - 93. Elytral intervals of Chlaenius (Lithochlaenius) spp. 80 Chlaenius chuanqianensis sp. n., holotype 81 Chlaenius linwensini sp. n., holotype 82 Chlaenius propeagilis sp. n., holotype 83 Chlaenius agilis Chaudoir, holotype 84 Chlaenius formosensis Lorenz, CCCC 85 Chlaenius leishanensis, IZCAS 86 Chlaenius noguchii Bates, IZCAS 87 Chlaenius wrasei Kirschenhofer, IZCAS 88 Chlaenius agiloides Jedlicka, IZCAS 89 Chlaenius rambouseki Lutshnik from Ussuri region, IZCAS 90 Chlaenius anchomenoides Bates, paratype 91 Chlaenius nuristanus Jedlicka, paratype 92 Chlaenius nuristanus Jedlicka, paratype 93 Chlaenius rambouseki Lutshnik from Taiwan, CCCC. Scale line = 1.0 mm.

Figures 94 - 116. Abdominal sternum VII (ventral aspect) of Chlaenius (Lithochlaenius) species 94 Chlaenius chuanqianensis sp. n., male, holotype 95 Chlaenius chuanqianensis sp. n., female, paratype 96 Chlaenius linwensini sp. n., male, holotype 97 Chlaenius linwensini sp. n., female, paratype 98 Chlaenius propeagilis sp. n., male, holotype 99 Chlaenius propeagilis sp. n., female, paratype 100 Chlaenius agilis Chaudoir, male, holotype 101 Chlaenius formosensis Lorenz, male 102 Chlaenius formosensis Lorenz, female 103 Chlaenius leishanensis Kirschenhofer, male 104 Chlaenius leishanensis Kirschenhofer, female 105 Chlaenius noguchii Bates, male 106 Chlaenius noguchii Bates, female 107 Chlaenius wrasei Kirschenhofer, male 108 Chlaenius wrasei Kirschenhofer, female 109 Chlaenius agiloides Jedlicka, male 110 Chlaenius agiloides Jedlicka, female 111 Chlaenius rambouseki Lutshnik, from Ussuri region, male 112 Chlaenius rambouseki Lutshnik from Ussuri region, female 113 Chlaenius anchomenoides Bates, male, paratype 114 Chlaenius nuristanus Jedlicka, male, paratype 115 Chlaenius nuristanus Jedlicka, female, paratype 116 Chlaenius formosanus Jedlicka from Taiwan, male. Scale line = 1.0 mm.

Figures 117 - 130. Aedeagi of Chlaenius (Lithochlaenius) species 117 Chlaenius chuanqianensis sp. n., holotype (dorsal view) 118 Chlaenius chuanqianensis sp. n., holotype (left lateral view) 119 Chlaenius linwensini sp. n., holotype (dorsal view) 120 Chlaenius linwensini sp. n., holotype (left lateral view) 121 Chlaenius propeagilis sp. n., holotype (dorsal view) 122 Chlaenius propeagilis sp. n., holotype (left lateral view) 123 Chlaenius agilis Chaudoir, holotype (dorsal view) 124 Chlaenius agilis Chaudoir, holotype (left lateral view) 125 Chlaenius formosensis Lorenz, holotype (dorsal view) 126 Chlaenius formosensis Lorenz, holotype (left lateral view) 127 Chlaenius leishanensis Kirschenhofer (dorsal view) 128 Chlaenius leishanensis Kirschenhofer (left lateral view) 129 Chlaenius noguchii Bates (dorsal view) 130 Chlaenius noguchii Bates (left lateral view). Scale lines: A = 1.0 mm (Figs 117, 119, 121, 123, 125, 127, 129); B = 0.5 mm (Figs 118, 120, 122, 124, 126, 128, 130).