Eucorydia asahinai, Yanagisawa & Sakamaki & Jantarit & Shimano, 2021

Yanagisawa, Shizuma, Sakamaki, Yositaka, Jantarit, Sopark & Shimano, Satoshi, 2021, A New Species of the Genus Eucorydia (Blattodea: Corydiidae) from Chiang Mai in Northern Thailand, Species Diversity 26 (2), pp. 191-195 : 192-193

Eucorydia asahinai sp. nov.

[New Japanese name: Itsutsuboshi-rurigokiburi] ( Figs 1 , 2 )

Eucorydia aenea: Asahina 1971: 258 (not Corydia aenea Brunner von Wattenwyl, 1865 ).

Eucorydia sp. 1 : Qiu et al. 2017: 53.

Material examined. Holotype: male (SY-01), elevation unknown (see Remarks section), Doi Pui (Chiang Mai), THAILAND, 17 June 1965, S. Asahina leg. Paratype: 1 fe-

male (SY-02), elevation unknown: same as holotype, Doi Pui (Chiang Mai), THAILAND, 17 June 1965, Y . Miyatake leg .

Diagnosis. The new species resembles E. aenea , E. dasytoides , E. yunnanensis , E. pilosa , E. guilinensis , E. tangi , E. linglong , and E. tokaraensis . However, it can be distinguished from other species by the combination of the following characteristics: genitalia shape of the male specimen, R2 slightly elongated and basal left protruded triangularly, basal half of L7 compressed subtrapezoidal, with its distal half long spatulate with a beak-like apex, tegmina with three orange markings in the middle and a pair of orange markings at the base of tegmina. This species can be distinguished from E. aenea by the position of the orange markings on the tegmen ( Fig. 1A ) and can also be distinguished from E. dasytoides and E. tokaraensis by R2 of the male genitalia, being slightly elongated with a triangular protrusion at the basal left ( Fig. 1O ). Additionally, it differs from E. yunnanensis , E. linglong , E. tangi , E. pilosa , and E. guilinensis by L7 of the male genitalia, that is compressed subtrapezoidal at the basal half and long spatulate with a beak-like apex at the distal half ( Fig. 1P ).

Description. Male (n=1): Body length unknown [14.5 mm in Asahina (1971)], since the abdomen had already been removed and dissected; overall length (from the head to the tip of the tegmen) 16.9 mm; pronotum length 4.0 mm×6.0 mm in width; tegmen length 13.8 mm [though 13.0 mm in Asahina (1971)] ( Fig. 1A, B ).

Head shiny, black. Antenna black with four whitish subapical segments ( Fig. 1E ). Pronotum metallic blue to metallic bluish-green. Tegmina metallic blue to metallic bluishgreen, becoming brownish toward the apex; a pair of orange pubescent blotches large, distinct at the base near scutellum; three orange spots arranged in the middle. Hindwings hyaline, pale brown, becoming darker toward the apex with an obscure orange blotch in the middle of costa ( Fig. 1F ). Sc single; RA+RP with 9–13 branches; M with 2 branches, but with some crossveins in the middle; CuA with approximately 7–9 branches; CuP single; AA+AP with 17–20 branches ( Fig. 1F ). Legs shiny black.

Dorsal side of abdomen yellow, from 6th to 8th segment with lateral black area, 9th segment black ( Fig. 1G, J ). Ventral side yellow, 5th and 6th segments becoming black laterally, 7th and 8th segments black ( Fig. 1B, H ). Supra-anal plate black ( Fig. 1J ); hind median margin concave; cercus consisting of eight segments. Subgenital plate black, trapezoidal with styli ( Fig. 1I ).

Genitalia ( Fig. 1N–Q ): Left phallomere: L3 slender and curved, gradually narrowing toward the apex with a distinct hook ( Fig. 1Q ); basal half of L7 protruded to the left, forming compressed subtrapezoid, distal half of L7 long spatulate with a beak-like apex ( Fig. 1P ). Right phallomere: R2 slightly elongated with a truncated apex and a triangular protrusion at the basal left ( Fig. 1O ).

Female (n=1): Body length unknown [14.0mm in Asahina (1971)], since the abdomen had already been removed and dissected; pronotum length 3.4mm × 6.5 mm in width. Tegmen length 9.5 mm [though 9.0 mm in Asahina (1971)] ( Fig. 1C, D ). Head, pronotum, and tegmen similar in color to the male specimen ( Fig. 1C ). Dorsal side of abdomen yellow, from 6th to 8th segment black ( Fig. 1C, K ). Ventral side of abdomen black with yellow lateral area, 7th and 8th segments black ( Fig. 1D, L ). Supra-anal plate black, semicircular in shape ( Fig. 1K ). Subgenital plate black, rounded ( Fig. 1M ).

Distribution. Until present, the new species described here has been found only from Doi Pui, Chiang Mai, northern Thailand ( Fig. 2 ).

Etymology. The new species was named in honor of Dr. Syoziro Asahina, for the outstanding contribution to the study of cockroaches.

Remarks. The elevation at which the specimens were obtained is unknown. Asahina (1971) referred it as 1685m, but specimen label gives it as 1865 m ( Fig. 3 ), since the summit of Mt. Doi Pui is actually 1685m, Asahina (1971) might have meant to say that the collection site was near the summit.

Figures

Fig. 1. Male and female of Eucorydia asahinai sp. nov. A–B, Male (holotype); C–D, female (paratype); E, antenna; F, hindwing of male (holotype); G, dorsal view of the abdominal segments of male (holotype); H, ventral view of the abdominal 7th and 8th segments of male; I, subgenital plate of male (holotype); J, dorsal view of the abdominal 8th and 9th segments and supra-anal plate of male (holotype); K, supraanal plate of female (paratype); L, ventral view of the abdominal 6th segment of female (paratype); M, subgenital plate of female (paratype); N, right phallomere with L7; O, R2; P, L7; Q, genital hook/L3. Scale bars: 5mm.

Fig. 2. Sampling locality (circle symbol) of Eucorydia asahinai in Chiang Mai, northern Thailand.

Fig. 3. Specimen labels of Eucorydia asahinai sp. nov. A, Specimen label of male (holotype); B, specimen label of female (paratype); C, identification label of male (holotype) and female (paratype) by Dr. S. Asahina (Japanese part was written as below: they have intermediate appearance between Euc. aenea and Euc. plagiata (=E. ornata), but yellow part of the abdomen is larger than those of both).