Inventory of the Carabid Beetle Fauna of the Gaoligong Mountains, Western Yunnan Province, China: Species of the Tribe Broscini (Coleoptera: Carabidae).
Creators: name: Kavanaugh, David H.
name: Liang, Hongbin
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy

description: Key for identification of adults of broscine species of the Gaoligong Shan Region
1 Size large, BL of male or female greater than 15.0 mm............................ 2
1’ Size moderate, BL of male or female less than 13.0 mm........................... 3
2(1) Head (Fig. 5a) with very deep, sharply defined and impunctate cleft on vertex between tempora; male with protarsomeres 1 and 2 and mesotarsomeres 1 and 2 with ventral pads of adhesive setae … Genus Eobroscus Kryzhanovskij. ............ Eobroscus bhutanensis Morvan
2’ Head (Fig. 5b) with shallower, broader, and distinctly punctate transverse sulcus between tempora; male protarsomeres 1 to 3 with ventral pads of adhesive setae, all male mesotarsomeres lacking ventral pads of adhesive setae … Genus Broscus Panzer. Broscus punctatus (Dejean)
3(1’) Pronotum (Figs. 5 c-d) with basolateral setae present; antennomere 3 with sparse pubescence in apical one-third to one half, antennomere 4 pubescent; male protarsomeres and mesotarsomeres 1 and 2 with small ventral pads of adhesive setae … Genus Broscodera Lindroth subgenus Sinobrosculus Deuve. .................................................. 4
3’ Pronotum (Figs. 6, 7) with basolateral setae absent; antennomeres 3 and 4 glabrous except for apical whorl of setae; male protarsomeres 1 to 3 with larger ventral pads of adhesive setae, mesotarsomeres 1 and 2 with larger ventral pads … Genus Broscosoma Rosenhauer. ..... 5
4 (3) Size larger, BL = 10.0 mm or more; body color piceous or dark brown; head (Fig. 5d) with eyes more convex and slightly larger, their diameter equal to length of tempora, vertex with post-temporal transverse sulcus densely, coarsely and, more widely punctate; hindwings full-sized, functional for flight; hind trochanter asetose (Fig. 8a); male genitalia as in Fig. 14 ....................................................... Broscodera gaoligongensis sp. nov.
4’ Size smaller, BL = 9.5 mm or less; body color reddish brown; head (Fig. 5c) with eyes flatter and smaller, their diameter less than length of tempora, vertex with post-temporal transverse sulcus narrowly punctate only along bottom of sulcus; hindwings slightly reduced, non-functional for flight; hind trochanter unisetose (Fig. 8b); male genitalia as in Fig. 12 .................................................................... Broscodera chukuai sp. nov.
5 Elytral silhouette subparallel to subovoid, with humeri (shoulders) more (Figs. 24a, 28a, 32a) or less (Figs. 17a, 26a, 30a) distinct............................................. 6
5’ Elytral silhouette ovoid, with humeri indistinct (Figs. 15a, 18a, 20a, 22a, 34a)......... 11
6 (5’) Pronotum with lateral margination (lateral bead) complete (Fig. 9a) between apical and basal margins; dorsal surface with distinct blue or blue-green luster, legs pale rufous; elytral microsculpture distinct, comprised of isodiametric to slightly longitudinally stretched sculpticells, elytral striae distinctly punctate; male genitalia as in Fig. 25 .................................................................. Broscosoma holomarginatum sp. nov.
6’ Pronotum with lateral margination absent or incomplete (Figs. 9 b-d)................. 7
7 (6’) Pronotum with lateral margination complete anterior to midlateral seta, interrupted briefly in basal half (Fig. 9b); elytral humeri as in Fig. 30; dorsal surface of head and pronotum vivid metallic green, elytra darker blue-green, legs pale rufous; vertex with post-temporal transverse sulcus relatively shallow and broadly and densely punctate (Fig. 6d); elytral microsculpture effaced; metatrochanter asetose (Fig. 8c); male genitalia as in Fig. 29 ...................................................................... Broscosoma resbecqi sp. nov.
7’ Pronotum with lateral margination absent, present only posterior to sub-basal constriction, or also present in area of midlateral seta (in a few specimens of B. ribbei extended almost to anterior margin (Fig. 9c), but these specimens have the metatrochanter unisetose)........... 8
8(7’) Elytral microsculpture distinct, comprised of moderately impressed isodiametric sculpticells; metatrochanters unisetose (Fig. 9d) (except asetose unilaterally in some specimens); elytral silhouette as in Fig. 32a; size larger, BL = 8.9 mm or more; pronotum globose anterior to sub-basal constriction as in Fig. 6b, in most specimens with lateral margination present in region of midlateral seta (Fig. 9c) and also basal to sub-basal constriction and/or extended further anterior to midlateral seta in some specimens (absent entirely from a few specimens); vertex with post-temporal transverse sulcus relatively shallow and narrowly and sparsely punctate (Fig. 6b); entire dorsum of body bright metallic golden-green, green (Fig. 32a), or blue-green; male genitalia as in Fig. 33 ............................................. Broscosoma ribbei Putzeys
8’ Elytral microsculpture faintly impressed or effaced; metatrochanters asetose (Fig. 8c) (although a few specimens of B. purpureum have one or both metatrochanters unisetose); size generally smaller, BL = 8.5 mm or less (except BL of B. danzhuense holotype = 9.3 mm); pronotum of different shape (Figs. 6c,e,f), with lateral margination absent or present only at or posterior to sub-basal constriction (Fig. 9d); dorsum of body bright metallic blue, blue-green, or darker and duller green................................................................ 9
9 (8’) Dorsum of body bright metallic blue or bluish-purple, head with greenish hue in some specimens, legs (including femora) pale rufous; elytral humeri distinct (Fig. 28a), angulate, elytral striae coarsely punctate, elytral microsculpture effaced; shape of pronotum as in Fig. 6c; male genitalia as in Fig. 29 .............................. Broscosoma purpureum sp. nov.
9’ Dorsum of body green or blue-green, legs with femora darker, reddish-brown to piceus; elytral humeri (Figs. 17a, 26a) less distinct, more rounded, elytral striae more finely punctate, elytral microsculpture faint but evident; shape of pronotum as in Figs. 6e,f ............... 10
10 (9’) Body larger, BL = 9.3 mm; elytral silhouette (Fig. 17a) with greatest width distinctly posterior to midlength; eyes (Fig. 6e) moderately convex; elytra with only stria 1 impressed, all other striae represented only be punctures diminishing in size and depth laterally and posteriorly, elytral intervals flat; entire dorsum of body dark green; male unknown................................................................ Broscosoma danzhuense sp. nov.
10’ Body smaller, BL 8.5 mm or less; elytral silhouette (Fig. 26a) with greatest width at or near midlength; eyes (Fig. 6f) less convex, slightly flattened in some specimens; elytra with two or more striae impressed, all striae punctate with punctures diminishing in size and depth laterally and posteriorly, at least medial two or more elytral intervals very slightly to moderately convex; dorsum with head green, elytra blue-green and pronotum either green or blue-green; male genitalia as in Fig. 27 .................................... Broscosoma parvum sp. nov.
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11 (5’) Metatrochanter unisetose (Fig. 8d)........................................ 12
11’ Metatrochanter asetose (Fig. 8c) (except unilaterally unisetose in very few specimens of B. bicoloratum)............................................................ 13
12 (11’) Dorsum of body piceous, without any trace of metallic reflection (Fig. 18a); antennomeres 3 and 4 distinctly darker than antennomeres 1 and 2; pronotum anterior to sub-basal constriction (Fig. 7a) longitudinally slightly ovoid in dorsal view; genal ridge evident, extended from base of head to ventral margin of eye (Fig. 10a); male genitalia as in Fig. 19, with median lobe longer and more slender and with apical lamella distinctly expanded ventrally in lateral view.......................................................... Broscosoma furvum sp. nov.
12’ Dorsum of head and pronotum black or dark piceous, elytra with bright metallic green or blue-green reflection (Fig. 20a); antennomeres 1 through 4 concolorous, pale rufous; pronotum anterior to sub-basal constriction (Fig. 7d) globose in dorsal view; genal ridge evident basal to post-temporal constriction but extended only to or slightly anterior to the constriction (Fig. 10b); male genitalia as in Fig. 21, with median lobe slightly shorter and thicker and apical lamella more symmetrically rounded in lateral view... Broscosoma gaoligongense Deuve and Wrase
13 (11’) Head and pronotum black to piceous but with distinct metallic green band across anterior part of pronotum (Fig. 7b) anterior to anterior transverse impression; head with tempora slightly inflated, sharply convex or vaguely angulate; pronotum anterior to sub-basal constriction slightly to moderately longitudinally ovoid in dorsal view; elytral microsculpture distinct, comprised of moderately impressed isodiametric sculpticells; male genitalia as in Fig. 35, with median lobe slightly longer and apical lamella broader in lateral view................................................................... Broscosoma viridicollare sp. nov.
13’ Head and pronotum black to piceous, without metallic reflection (except a few specimens of B. bicoloratum have faint a metallic green band across anterior part of pronotum); head with tempora only slightly (Fig. 7e) or distinctly (Fig. 7c) convex; pronotum either globose or slightly longitudinally ovoid in dorsal view; elytral microsculpture indistinct, effaced or only extremely faintly evident in some areas............................................... 14
14 (13’) Pronotum globose anterior to sub-basal constriction as in Fig. 7c; head with tempora distinctly convex behind eyes; male genitalia as in Fig. 16 ... Broscosoma bicoloratum sp. nov.
14’ Pronotum anterior to sub-basal constriction slightly longitudinally ovoid in dorsal view (Fig. 7e); head with tempora straight or only slightly convex behind eyes; male genitalia as in Fig. 23 .............................................. Broscosoma gongshanense sp. nov.
description: Published as part of Kavanaugh, David H. & Liang, Hongbin, 2021, Inventory of the Carabid Beetle Fauna of the Gaoligong Mountains, Western Yunnan Province, China: Species of the Tribe Broscini (Coleoptera: Carabidae)., pp. 85-182 in Proceedings of the California Academy of Sciences 67 (4) on pages 90-92, DOI: 10.5281/zenodo.11067355