Eysarcoris guttigerus ( Thunberg, 1783 )

Tsai, Jing-Fu & Rédei, Dávid, 2009, The identity of shield bugs described by Francis Walker from Taiwan (Hemiptera: Heteroptera: Pentatomidae), Zootaxa 2152, pp. 43-54 : 44-45

Eysarcoris guttigerus ( Thunberg, 1783)

Cimex guttigerus Thunberg, 1783: 32 . Syntype (s): „ Iaponia ” [= Japan]; UZIU? (lost? Josifov and Kerzhner 1978: 169; Rider 2006: 299).

= Eysarcoris latus Walker, 1868: 557 . Syntype (s): „ Formosa ” [= Taiwan]; MVMA. New synonymy. = Eysarcoris pustulatus Walker, 1868: 557 . Syntype (s): „ Formosa ” [= Taiwan]; MVMA. New synonymy.

For a complete list of synonyms, see Rider (2006: 299).

Main references for Eysarcoris guttigerus . Breddin 1909: 274 (figure of pygophore); Esaki 1926: 148 (first record from Taiwan); Esaki, 1959: 193 (redescription, habitus); Kobayashi 1960: 86 (preimaginal stages); Hsiao & Zheng 1977: 134 (redescription, figure of pronotum and pygophore, photo, listed from Taiwan); Josifov & Kerzhner 1978: 168 (type material, figure of pygophore and paramere); Tomokuni 1993: 225 (redescription, colour photo, biology, listed from Taiwan); Rider 2006: 299 (catalogue, Taiwan).

References for Eysarcoris latus and E. pustulatus . Lethierry & Severin 1893: 140 (catalogue); Distant 1900: 435 (list, type depository); Kirkaldy 1909: 84, 85 (catalogue); Kirkaldy 1910: 105 (list); Esaki 1926: 148 (list); Hoffmann 1935: 55, 56 (catalogue); Rider et al. 2002: 140 (list); Rider 2006: 300 (catalogue).

Type material examined. Eysarcoris latus Walker : LECTOTYPE (sex?), by present designation: „ TYPE ” [red square, printed]; „ Eysarcoris \ latus \ Formosa ” [Walker’s handwriting]; „ HOLOTYPE \ T-20187 \ Eysarcoris \ latus \ Walker” [red square, printed + handwritten]; „ LECTOTYPUS \ Eysarcoris latus \ Walker, 1868 \ des. Tsai JF & Rédei D, 2009” [red square, printed]; MVMA. Pinned; segments III–IV of left, segments IIa–IV of right antenna, tarsal segments II–III of left fore and right mid legs, tarsus of left hind leg, right hind leg, and abdomen missing ( Fig. 1 ). — Eysarcoris pustulatus Walker : LECTOTYPE (♀), by present designation: „ TYPE ” [red square, printed]; „ Eysarcoris \ pustulatus \ Formosa ” [Walker’s handwriting]; „ HOLOTYPE \ T-20188 \ Eysarcoris \ pustulatu[s] \ Walker” [red square, printed + handwritten]; „ LECTOTYPUS \ Eysarcoris pustulatus \ Walker, 1868 \ des. Tsai JF & Rédei D, 2009” [red square, printed]; MVMA. Pinned; segment IV of right antenna, tibia and tarsus of left fore leg, tarsus of right mid leg, femora, tibiae, and tarsi of left mid leg, and both hind legs missing ( Fig. 2 ).

Discussion. The examined syntype of E. latus ( Fig. 1 ) is missing the abdomen, and that of E. pustulatus ( Fig. 2 ) is a female. However, we directly compared the holotypes to specimens of several species of Eysarcoris occurring in Taiwan and the neighbouring areas, and we are fully convinced that both of Walker’s species are conspecific with E. guttigerus [male genitalia of this species were figured by Josifov and Kerzhner (1978)]. This well-known species is widely distributed all over the Oriental Region and the temperate East Asia, and it is frequent in Taiwan too.

Walker noted the similarity between pustulatus and guttigerus , but he regarded the sculpture of the pronotum and the size of the basal callosities of the scutellum as of specific importance. By direct comparison of the examined syntype of pustulatus to several specimens of guttigerus , no significant difference could be observed in the sculpture of the pronotum. In addition, in several specimens of guttigerus examined by us, the size of the basal callosities of the scutellum shows considerable intraspecific variability from well developed to almost missing.

Figures

FIGURES 1 – 3. Holotypes and labels of 1, Eysarcoris latus Walker, 2, E. pustulatus Walker and 3, Sciocoris lugubris Walker. Scales in mm.