Pericalus (s. str.) dux Andrewes, 1920

Shi, Hongliang & Liang, Hongbin, 2018, Revision of genus Pericalus from China, with descriptions of four new species (Carabidae, Lebiini, Pericalina), ZooKeys 758, pp. 19-54: 26-28

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Pericalus (s. str.) dux Andrewes, 1920


Pericalus (s. str.) dux Andrewes, 1920  Figs 3, 32, 43, 54, 60

Andrewes 1920: 25 (type locality: Laos [Xieng Khouang]; Holotype in NHML); Csiki 1932: 1369 (catalogue); Jedlička 1963: 378.

Material examined.

1 female (SNU), "China, Yunnan Prov., Nabanhe N.R., Bengsaihe, Alt.700 m, 20-XI-2008, HU Jia-Yao & TANG Liang leg."; 1 female (SNU), "Manfei, Nabanhe conv., Yunnan Prov., 10.I.2004, Li & Tang leg".


Largest size of all species in the subgenus, body length 15.0-15.9 mm; dorsal surface black, elytra with four round yellowish spots; the anterior one in intervals 4-8, the posterior one in intervals 4-7. Pronotum transverse, PW/PL 1.47-1.50; lateral margins gently sinuate and then straight before nearly rectangular posterior angles; disc with fine wrinkles. Elytra flat; apex very faintly curved; outer apical angles rounded; sutural angles blunt or forming very short tooth; third interval with three setigerous pores, the middle one at approximately anterior third; striae shallow and impunctate; eighth and ninth interval with dense fine setae.


This species can be easily distinguished from all other known species in the subgenus by its larger size and distinctive elytral pattern (Fig. 3). Two other species P. longicollis  and P. gibbosus  also have four round spots on elytra, but P. dux  has wider spots placed laterally. This species is sympatric with P. ornatus  in south Yunnan. These two species can be distinguished by the differences in body sizes, the elytra patterns, and the outer apical angle of the elytra.

Supplemental description.

Male genitalia not studied. Female genitalia. Internal reproductive system (Fig. 54): spermatheca short and pedunculate, inserted on the bursa copulatrix; spermatheca tubular, approximately two times length of pedicel; pedicel short, branched near the joint; spermathecal gland absent. Gonocoxite 2 of ovipositor (Fig. 43) scimitar-shaped, gradually bent to the outer side after apical third; length approximately five times basal width; outer margin with two dorsolateral ensiform setae, the apical one placed near the middle, the basal one on the basal quarter, finer than the apical one; inner margin with one doromedial ensiform seta near apex.


Laos (Xieng Khouang, Pon Bai, Ban Sai, Muong Pek), China (Yunnan) (Fig. 60).