Calleida yunnanensis Shi & Casale

Shi, Hongliang & Casale, Achille, 2018, Revision of the Oriental species of Calleida Latreille (sensu lato). Part 2: the C. discoidalis species group (Coleoptera, Carabidae, Lebiini), ZooKeys 806, pp. 87-120 : 100-104

[4] Calleida yunnanensis Shi & Casale sp. n. Figs 22-31, Map 2

Type locality.

Yunnan, Pu’er city, Caiyanghe (22.60N, 101.12E, 1700 m).

Type materials.

Holotype: Male, "Yunnan, Simao, Caiyanghe national reserve, 1700 m, 2007.VII.28, leg. Zhao Yongshuang" (IZAS, Fig. 22). Paratypes (a total of 8 specimens): Yunnan: 2 females, same data as holotype (IZAS and CCA). 1 female, "Yunnan, Simao, Caiyanghe national reserve, Liechang, 2009.III.7, leg. Zhu Xiaoyu" (CCCC). 1 male, "Yunnan, Ruili, Mengxiu, 2150 m, 2005.VIII.3, leg. Mao Benyong" (HBUM). 1 female, "Yunnan, Ruili, Nongdao, Dengga, 1000 m, 2006.VIII.1, leg. Liu Biao" (IZAS). 1 female, "Yunnan, Ruili, Nongdao, Dengga to Mafengshan, 23.95285N, 97.59808E - 23.94485N, 97.55647E ", “927– 1207 m, 2009.VIII.10, leg. Shi Hongliang, beating" (IZAS). 1 female, "Yunnan, Ruili, Nongdao, Wudianshan, 920m, 2015-IX-11, beating on vegetation, Yang Xiaodong leg." (CCCC). Laos: 1 female, "Haut Mekong. Pou Lan. 13.V.1918. R.V. de Salvaza", “1961”, "Brit. Mus. 1921-89" (BMNH).

Specific epithet.

The name of the new species refers to its type locality: Yunnan, China.

Diagnosis.

With the character states of the C. discoidalis species group, but different from all other known species by the combination of: (1) elytra metallic green, with evident lustre of cupreous red or purple; (2) elytral discal reddish patch not well defined; (3) head, disc of pronotum and legs brownish, markedly darkened; (4) elytra with several very small additional setae on odd intervals; (5) abdominal sternite VII with two (seldom three) setae on each side in males, four or more in females; (6) median lobe of aedeagus with a cuneiform projection on the ventral side.

In this species group, C. yunnanensis sp. n. is somewhat similar to the two species ( C. discoidalis and C. luzonensis ) from the Philippines based on the presence of a reddish patch on elytral disc. But from the other two, C. yunnanensis can be distinguished by: (1) the darker color on head, pronotum, legs and ventral side; (2) the presence of cupreous reddish hue on elytra; (3) narrower pronotum and elytra; and (4) the characters of aedeagus which has a peculiar projection on the median lobe ventral surface.

In southern Yunnan, C. yunnanensis sp. n. is sympatric with C. quadricollis Straneo and one undescribed species belonging to the C. splendidula species group. These three species are similar in general features and coloration, but C. yunnanensis sp. n. can be readily distinguished by its higher number of setae on the terminal ventrite in both sexes.

Description.

General features as in Figs 22-24. Medium-sized: L = 9.4-9.8 mm.

Colour: Head dark reddish brown, vertex distinctly darker, approximate piceous; mouth parts and antennae yellowish brown, terminal palpomere with light yellow apex. Pronotum dark brown, with lateral expansions yellowish brown and disc slightly lighter along the median furrow; scutellum reddish brown. Elytra metallic green with marked cupreous reddish or purplish reflection, more evident in the apical area; metallic reflection gradually fainter toward the suture, forming a vague discal reddish brown patch almost without metallic lustre on the apical half or two thirds, not reaching elytral base, widest near elytral apical third or fourth, occupying the inner three or four intervals, sometimes the fifth interval also partly brownish; lateral margins, elytral suture, and epipleura brownish with faint metallic reflection. Ventral side reddish brown to dark brown, with metacoxae and adjacent metasternal area generally lighter; legs brown, femora gradually darker to apex, tibiae infuscate at base, tarsomeres yellowish brown.

Lustre and microsculpture: Dorsal surface moderately shiny and polished; head and pronotum with vanished microsculpture; elytra with faint microsculpture in isodiametric meshes, more evident in females.

Head: Slightly convex, almost impunctate; frons with oblique wrinkles aside, weakly defined or very faint; supraorbital furrows moderately deep, vanished at half of the inner edge of eyes; temporae moderately swollen, gradually narrowed towards the neck; genae longer than the half length of eyes; antennae reaching the basal fifth of elytra; terminal labial palpomere strongly securiform with truncate apex in males, also dilated but less so in females; mentum lateral lobes with outer margins straight, inner margins oblique; mentum tooth obtuse with apex truncate or slightly rounded, with two short setae inserted at the base of tooth.

Pronotum: Sub-quadrate (ratio PW/PL = 1.07-1.13), with its maximum width near anterior third; lateral expansions moderately wide; lateral margins arcuate at the middle, more or less sinuate before the posterior angles; posterior angles rectangular or obtuse, sometimes slightly pointed at apex; disc weakly convex, sometimes with very faint transverse wrinkles and a few punctures along the median furrow; median furrow distinct, but not reaching anterior nor posterior margins.

Elytra: Elongate (ratio EL/EW = 1.72-1.75), with basal border complete, extended to the parascutellar stria; striae distinct, finely punctate, with punctures gradually weakened in the apical part; intervals flat, finely and sparsely punctate; the third, fifth and seventh intervals each with more than 10 very small additional pores, slightly larger than interval punctures, each bearing one short seta, setae a little longer in the basal area of intervals; the eighth interval distinctly tumid near apex; umbilicate series of 15-16 pores along the eighth stria; apical truncation straight or very weakly concave; lateral margins distinctly thickened at the outer apical angles, which are obtusely rounded.

Ventral side: Mostly glabrous, lateral areas of prosternum at apex and metasternum with a few short setae; abdominal sternites sparsely pubescent. Abdominal sternite VII with two (the holotype bearing three setae on the right side) setae on each side in males, the inner seta placed a little forward; with four to six setae on each side in females, with the outer second seta placed a little forward; apical margin of abdominal sternite VII distinctly notched in males, straight in females.

Male genitalia (Figs 25-28): Median lobe of aedeagus pleuropic left, peculiarly shaped, with a conspicuous cuneiform projection near the middle of the ventral side (Fig. 25); apical surface of the projection bearing numerous fine setae (Fig. 26), almost perpendicular to the surface of the ventral margin; right lateral surface finely and longitudinally wrinkled before the apical orifice; apical lamina flat, a little longer than the basal width, rounded at apex. Endophallus with two chitinized copulatory pieces, close to the left lateral side of the median lobe, adjacent to each other at base, nearly V-shaped. Left paramere rounded, longitudinally depressed on the dorsal side, raised at base, about one and a half times longer than wide; right paramere slightly emarginate.

Female genitalia (reproductive tract Fig. 31 and gonocoxa Figs 29, 30): Spermatheca digitiform, not so straight as in the species treated above, nearly as long as the pedicel, with a stout triangular basal projection (much shorter than in C. fukiensis ); surface distinctly whorled; spermathecal pedicel markedly dilated at the basal two thirds, apical third slender; spermathecal gland duct laterally inserted at base of the projection, very long and slender, about 1.5 times as long as spermatheca; glandular area barely incrassate, about same length as gland duct, base with atrium not protuberant. Gonocoxite I wide, with microsculpture; gonocoxite II narrow, approximate subulate, three times as long as wide at base; inner margin setose in the apical fourth; both outer and inner margins straight; apex obliquely truncate with membranous setose extension.

Geographical distribution and habitat.

Known from two localities of southern and southwest Yunnan, and northern Laos (Luang Namtha) (Map 2). In southern Yunnan, this species was found in a mountain rainforest and an evergreen broad-leaf forest at middle elevation (ca 1000 m). One specimen was collected by beating shrubs along a dirt path.

Remarks.

We examined one female from northern Laos (Fig. 24), labeled as "Haut Mekong. Pou Lan." (R.V. de Salvaza) (BMNH) probably referring to Ban Phou Lan (20.555N, 101.001E, 890 m) in Luang Namtha Province. Different from other specimens in Yunnan, this specimen from Laos has the elytra almost completely greenish, only with very faint reddish hue, 12 setae in female abdominal sternite VII, and a little wider gonocoxite II. Besides the above minor differences, all characters including the female reproductive tract have no significant difference from the typical C. yunnanensis from Yunnan, China. So at moment we attribute this specimen to C. yunnanensis , although its distribution is a little distant.