Calleida gressittiana Casale & Shi

Casale, Achille & Shi, Hongliang, 2018, Revision of the Oriental species of Calleida Latreille (sensu lato). Part 1: Introduction, groups of species, and species of six species groups (Coleoptera: Carabidae: Lebiini), Zootaxa 4442 (1) : 10-12

[1] Calleida gressittiana Casale & Shi sp. n.

Type locality: Malaysia, N Borneo: Sabah, Kinabalu Mountain.

Type material: Holotype, male, “ Nord Bornéo Mont Kina Balu 5-8-1903 John Waterstradt ” (MNHN, fig. 19 ). Paratypes: one female “ Malaysia: Borneo (Brit. N.) Sandakan Bay (NW) Sepilok For. Res. 1-10 m, X-27-1957 ” NHML); one female, same data, “J.L. Gressitt Malaise trap J.L. Gressitt collector Bishop Museum” ( NHML, fig. 20 ); one female, “ Malaysia, Kalimantan, Kota Kinabalu, Gunung Emas Nat. Park– Raflesia (sic!) 6- 10.2.1999 ” ( CCA).

Specific epithet. We are pleased to dedicate this new, handsome species to Judson Linsley Gressitt, who devoted much effort and time to developing knowledge of the insect fauna of SE Asia, New Guinea and Micronesia and collected two specimens of this species in Borneo. J. L. Gressitt was born in Tokyo on 16 June 1914 and as professional entomologist and zoologist spent his academic activity among U.S. A, China and Japan, with many biological explorations in remote areas, mountains climbed, and countless flights in small planes in several dangerous countries. He and his wife Margaret were aboard a regular commercial flight that crashed in south China on April 26, 1982 ( Radovsky, 1983).

Diagnosis. With the character states of the genus Calleida in the widest sense, but from all Asiatic species known so far markedly characterized by the peculiar combination of the following morphological characters: medium sized (L: 8.2–8.8 mm); antennomeres 1–3 with several additional fine setae besides the primary ones ( fig. 7 ); pronotum markedly cordiform, its anterior angles and lateral margins setose ( fig. 11 ); elytra elongate-ovate; elytral striae very deep, punctate, intervals convex. Dorsal surface markedly bicolor: head and pronotum reddish, contrasting with the metallic, dark blue-violet elytra; legs bicolor: femora and tibiae blackish, tarsomeres reddishbrown. Abdominal sternum VII with one seta on each side in males, two in females. Male genitalia with a long and bent chitinized flagellum on the endophallus ( fig. 21 ).

This species is similar to some representatives of the C. chloroptera species group in general appearance, but can be easily distinguished by the presence of additional setae on the lateral margins of pronotum and the three basal antennomeres. Only one other species, C. excelsa Bates ( fig. 8 ), have accessory setae on the first three antennomeres among all Asiatic Calleida , but is markedly different from the new species by its densely pubescent body (see below, C. lativittis species group).

Description. General features as in figures 19, 20 . Medium sized: L: 8.2–8.8 mm; TL: 8.0– 8.4 mm.

Colour: head and pronotum reddish; basal two antennomeres and base of the third reddish; following antennomeres dark piceous. Pterothorax and abdominal sterna blackish. Elytra metallic dark blue-violet, with a touch of metallic cupreous-green at base and apex. Femora and tibiae dark piceous to black, tarsomeres reddishbrown.

Lustre and microsculpture: head, pronotum and elytra shiny, with generally effaced microsculpture on head and pronotum, more evident on the elytral intervals for females, in form of transverse mesh pattern, effaced on pronotum for males. Pronotal disc and elytral intervals with fine, hardly visible micro-punctuation.

Head: wide, with evident neck constriction; genae swollen, contiguous with the posterior margin of eyes; eyes very large and prominent. Antennomeres 1–3 with several additional fine setae besides the primary setae.

Pronotum: transverse-cordiform (ratio PW/PL: 1.18–1.23), with lateral margins deeply sinuate and constricted to the base; anterior angles setose, lateral margins densely setose on anterior half, sporadically setose on posterior half. Lateral furrows wide, lateral reflection moderate. Disc depressed, with superficial, scarce transverse wrinkles. Anterior angles not prominent; basal angles acutely prominent outside, basal foveae wide and deep. Base straight, slightly oblique and beaded at sides only. One mid-lateral seta and one basolateral seta on each side present.

Elytra: elongate-ovate (ratio EL/EW: 1.55–1.64), sub-convex, slightly widened at the apical third; humeral angles rounded; striae deeply impressed, punctate; intervals convex. Post-humeral sinuation inconspicuous, preapical callosity small, slightly distinct at apex of the sixth and seventh intervals. Apex beaded, oblique, with the outer angles fully rounded, not thickened. The third interval with two discal and one apical setiferous punctures; umbilicate series of 16 deep, foveate punctures along eighth stria, interrupted in the middle.

Legs: basal two metatarsomeres with distinct dorsal groove; the fourth tarsomere deeply bilobed, its lobes long and widened. Tarsal claws denticulate, each with six long teeth on the inner side.

Abdominal sterna: sternum VII with one seta on each side in males, two setae in females; apex notched in males, straight in females.

Male genitalia: median lobe of aedeagus ( fig. 21 ) flattened, in lateral view slightly curved; ventral margin distinctly protruded near the middle, in ventral aspect slightly expanded before the apical orifice; apical lamina short, rounded in ventral aspect; endophallus with a long chitinized flagellum (as modification of the ventral copulatory piece), twisted and dilated at base, bent backward at apex.

Female genitalia: not examined.

Geographical distribution and habitat. Known so far only from NE Borneo (Sabah, Malaysia) in tropical rain forest ( map 1 ). Some specimens were obtained from Malaise trap and giant flowers of Rafflesia (Rafflesiaceae) .

Figures

MAP 1 Distributions for species in the C. gressittiana group: C. gressittiana sp. n. (blue).

FIGURES 19–21. Calleida gressittiana sp. n. 19 habitus and labels of holotype (male, Kinabalu, Borneo, MNHN), scale bar = 2.0 mm; 20 habitus of paratype (female, Sandakan, Borneo, NHML), scale bar = 2.0 mm; 21 median lobe of aedeagus, rightlateral, ventral, left-lateral, and dorsal views (holotype), scale bar = 0.5 mm.

FIGURES 1–18. Characters of Calleida spp. 1–3 sternum VII of males: 1 C. cf. splendidula (Guangdong, China), [apex notched, one seta on each side]; 2 C. fukiensis (Fujian, China), [apex notched, two setae on each side]; 3 C. puncticollis sp. n. (Holotype, Hubei, China), [apex straight, four setae on each side]. 4–6 sternum VII of females: 4 C. cf. splendidula (Guangdong, China), [two setae on each side]; 5 C. fukiensis (Shaanxi, China), [three setae on each side]; 6 C. puncticollis sp. n. (Hubei, China), [six and seven setae on each side]. 7–9 basal three antennomeres: 7 C. gressittiana sp. n. (Holotype), [with sparse additional setae]; 8 C. excelsa (Yunnan, China), [with dense additional setae]; 9 C. borneensis sp. n. (Sabah, Malaysia), [without additional setae]. 10 elytral shoulder, C. sultana (Yunnan, China), [humeral margins setose]. 11–14 pronotal anterior angle: 11 C. gressittiana sp. n. (Holotype), [with erect setae]; 12 C. excelsa (Yunnan, China), [with erect setae]; 13 C. sultana (Yunnan, China), [with erect setae]; 14 C. borneensis sp. n. (Sabah, Malaysia), [without setae]. 15–18 elytral outer apical angle: 15 C. corporaali (Sabah, Malaysia), [acute, forming sharp tooth]; 16 C. borneensis sp. n. (Sabah, Malaysia), [markedly widened, not forming tooth]; 17 C. doriae (Yunnan, China), [slightly widened]; 18 C. gressittiana sp. n. (Holotype), [completely round, not widened].