Chilocoris birmanus Lis
Creators: name: Imura, Jimpei
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cydnidae
Chilocoris
Chilocoris birmanus

description: Chilocoris birmanus Lis
(Figs. 4–5, 15–16, 23–25, 34–36, 43–44)
Chilocoris (Chilocoris) birmanus Lis, 1994: 65.
Diagnosis. Total length 4.75–6.00; total width, 2.70–3.20. Arrangement of paraclypeal secondary setae, in order from mesalmost to lateralmost: 3 pegs - 1 hair - 2 pegs - 1 hair - 1 peg (Fig. 5). Ocular index 2.9–3.5; interocellar index 2.5–5.0. Antennal segment III 2.4–3.5× as long as II. Pronotum broad, each lateral border depressed in anterior 3/5, bearing 6–7 setae on lateral submargin (Fig. 4).
The broad and laterally depressed pronotum, an important characteristic of this species, has also been reported in two other species, namely C. martensi Lis and C. deplanatus Lis, although C. birmanus can readily be distinguished from the former two by the larger body size (more than 4.50 mm) and the number of setae on the lateral submargin of pronotum (6–7) (see Lis 1994, 1997a). Despite the obvious difference in the pronotal shape, this species is similar in genital structures to the new species, C. monticola. Nevertheless, several features can be found to distinguish it from the new species, not only in the male organs, but in the female as well.
3 terminalia —Pygophore: ventro-posterior margin weakly prominent at middle; median projection rounded apically (Fig. 24); opening narrowed at upper 1/3 (Fig. 23). Phallus (Fig. 15): similar to that of C. monticola; conjunctival appendage roughly 2-lobed; its dorsal lobe very small, membranous, and ventral one broad, moderately sclerotized apically (Fig. 16). Paramere (Fig. 34–36) similar to that of C. monticola, but more slender. Proctiger (Fig. 25) somewhat elongate, 1.25× as long as wide.
♀ terminalia —Similar to C. monticola, but 2nd valvifer not distinctly angular in lower side (Fig. 44). Spermatheca (Fig. 45): duct longer than in C. monticola, especially in its distal, thinner section.
Specimens examined. 432Ƥ—TAIWAN: “ Formosa ”: 1Ƥ, 28.vii.1941, A. Kira leg. (NIAES). “Hasenzan”: 1Ƥ, 8.vii.1941, A. Kira leg. (Figs. 44–45) (NIAES). Mt. Taihei-zan, 2300 m alt., North Taiwan: 23, 28.vi.1941, T. Satô leg. (13, Figs. 5–6) (NIAES). Mt. Taihei-zan, Taihoku: 13, 3.viii.1932, K. Satô leg. (Figs. 16–17, 24–26, 35– 37) (ELKU); 13, 24.x.1932, K. Satô leg., det. as Cydnus maurius [!] Dallas by R.J. Izzard in 1959 (ELKU).
Distribution. Taiwan; Myanmar (north); India (northeast).
New to Taiwan.
Biology. Two specimens were collected from a mountain as high as 2300 m in altitude; it probably has a montane habitat.
Remarks. This species was initially described from Myanmar (labeled “Mines de rubis” [Lis 1994]; probably in the northern, mountainous regions) and northeastern India (Bengal and Sikkim). Specimens from Taiwan were examined in this study. Despite the great distance between the collection sites of the first collections and Taiwan, there were no remarkable differences between the characteristics of the Taiwanese specimens and those from the original description.
description: Published as part of Imura, Jimpei, 2011, New and obscure species of the genus Chilocorus Mayr in eastern Asia, with the proposal of a " nitidus - group " concept (Hemiptera: Heteroptera: Cydnidae), pp. 31-47 in Zootaxa 3012 on pages 34-36, DOI: 10.5281/zenodo.206103