Calleida gressittiana, Casale, Achille & Shi, Hongliang, 2018

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

1. Calleida gressittiana species group

Diagnostic characters: With the character states of Calleida (in the widest sense, see above), restricted or amplified as follows: Medium-sized species (L: 8.2–8.8 mm). Dorsal side bicolor: head and pronotum reddish, elytra bluish, without reddish patch. Antennomeres 1–3 with numerous fine setae in addition to the primary ones ( fig. 7 ); pronotal lateral margins setose through full length ( fig. 11 ). Abdominal sternum VII with one seta on each side in males, two setae in females. Endophallus of aedeagus with a long and bent chitinized flagellum ( fig. 21 ), which is the modified ventral copulatory piece.

Taxonomic note: One only species, C. gressittiana sp. n. from Borneo ( map 1 ), is attributed to this group. The phylogenetic position of this species group is questionable and isolated in the Asiatic fauna for its peculiar endophallus characters and the unique setation of antennae and lateral margins of pronotum. This is the only Asiatic species with a long, bent flagellum in endophallus, a feature widely represented amongst the Neotropical Calleida species. On the contrary, all other Asiatic species have in endophallus two smaller (rarely only one in the C. terminata species group), linear copulatory pieces, as in all Calleida species from Africa and Madagascar, or unarmed (only in C. puncticollis ).

This only character, which could be a result of homoplasy (evolutionary convergence), does not indicate any relationship with Neotropical Calleidina . It allows us, however, to isolate C. gressittiana sp. n. in a separate species group.

Figures

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

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].

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.