Chilocoris birmanus Lis

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), Zootaxa 3012, pp. 31-47 : 34-36

publication ID	https://doi.org/ 10.5281/zenodo.206103
DOI	https://doi.org/10.5281/zenodo.6182564
persistent identifier	https://treatment.plazi.org/id/039CCB09-FFEC-9D2C-439A-706B954BEDAF
treatment provided by	Plazi
scientific name	Chilocoris birmanus Lis
status

Treatment

( Figs. 4–5 View FIGURES 1 – 10 , 15–16 View FIGURES 15 – 20 , 23–25 View FIGURES 21 – 30 , 34–36 View FIGURES 31 – 42 , 43–44 View FIGURES 43 – 46 )

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 View FIGURES 1 – 10 ). 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 View FIGURES 1 – 10 ).

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 View FIGURES 21 – 30 ); opening narrowed at upper 1/3 ( Fig. 23 View FIGURES 21 – 30 ). Phallus ( Fig. 15 View FIGURES 15 – 20 ): 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 View FIGURES 15 – 20 ). Paramere ( Fig. 34–36 View FIGURES 31 – 42 ) similar to that of C. monticola , but more slender. Proctiger ( Fig. 25 View FIGURES 21 – 30 ) somewhat elongate, 1.25× as long as wide.

♀ terminalia —Similar to C. monticola , but 2nd valvifer not distinctly angular in lower side ( Fig. 44 View FIGURES 43 – 46 ). Spermatheca ( Fig. 45 View FIGURES 43 – 46 ): 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 View FIGURES 43 – 46 ) (NIAES). Mt. Taihei-zan, 2300 m alt., North Taiwan: 23, 28.vi.1941, T. Satô leg. (13, Figs. 5–6 View FIGURES 1 – 10 ) (NIAES). Mt. Taihei-zan, Taihoku: 13, 3.viii.1932, K. Satô leg. ( Figs. 16–17 View FIGURES 15 – 20 , 24–26 View FIGURES 21 – 30 , 35– 37 View FIGURES 31 – 42 ) (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.