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| Eucorydia asahinai Yanagisawa, Sakamaki, Jantarit & Shimano, 2021 |
Abstract
Specimens of the genus Eucorydia Hebard, 1929 from Chiang Mai, northern Thailand, were compared with eight closely similar congeners: E. aenea (Brunner von Wattenwyl, 1865), E. dasytoides (Walker, 1868), E. yunnanensis Woo, Guo, and Feng, 1986, E. pilosa Qiu, Che, and Wang, 2017, E. guilinensis Qiu, Che, and Wang, 2017, E. tangi Qiu, Che, and Wang, 2017, E. linglong Qiu, Che, and Wang, 2017, and E. tokaraensis Yanagisawa, Sakamaki, and Shimano, 2020, and turned out to be a different species from eight congeners. This species from Thailand is characterized by the specific male genitalia shape: right phallomere 2 (R2) slightly elongated, the basal left area of R2 forming a triangular protrusion, and the basal half of left phallomere 7 (L7) protruded to the left with long spatulate distal half and with a beak-like apex. This species is also characterized by the tegmina containing three orange markings in the middle, and with a pair of orange markings at its base. Based on the above, this species is described as a new species, Eucorydia asahinai sp. nov.
Keywords: morphology, male genitalia, taxonomy, anal area of tegmen, taxonomic key, cockroach
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| 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. |
Eucorydia asahinai sp. nov.
[New Japanese name: Itsutsuboshi-rurigokiburi]
Eucorydia aenea: Asahina 1971: 258 (not Corydia aenea Brunner von Wattenwyl, 1865).
Eucorydia sp. 1: Qiu et al. 2017: 53.
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).
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 1865m (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.
Shizuma Yanagisawa, Yositaka Sakamaki, Sopark Jantarit and Satoshi Shimano. 2021. A New Species of the Genus Eucorydia (Blattodea: Corydiidae) from Chiang Mai in Northern Thailand. Species Diversity. 26(2); 191-195. DOI: 10.12782/specdiv.26.191
