Gortyna guizhouensis, Wu & Yang & Han, 2022

Wu, Jun, Yang, Mao-Fa & Han, Hui-Lin, 2022, A new species of the genus Gortyna Ochsenheimer, 1816 from China, with notes on the larval feeding habits (Lepidoptera, Noctuidae, Noctuinae: Apameini), Zootaxa 5092 (5), pp. 587-592 : 588-591

Gortyna guizhouensis sp. n.

(Figs 1–4, 7–9, 11, 13–16)

Type-material. Holotype: ♂, China, Guizhou Province, Weining County, Zhejue Countryside , N 26.534273, E 103.916394, 6 IX 2021, legs. MF Yang, HY Zhao and M Leng, genit. slide no. hhl-4877-1, in NEFU . Paratypes: 2 ♂, 2 ♀, same data as for holotype, genit. slide no. hhl-4874-1, 4875-1, 4876-2, in NEFU .

Diagnosis. The new species is very similar to G. plumbitincta Hreblay & Ronkay, 1997 , but can be diagnosed with the latter by the following characters (character states for G. plumbitincta are parenthesized): G. guizhouensis sp. n. (Figs 1–4) is smaller, with a wingspan of only 34–37 mm in the type materials (that of the larger G. plumbitincta is 42–47 mm; Figs 5–6); the ground color is golden-red and veins indistinct (in G. plumbitincta is golden-orange, with veins appearing very distinct); the M 3 vein is common at the outer margin (in G. plumbitincta slightly bulge); the dark streak between the orbicular and reniform spots is present (in G. plumbitincta without). In the male genitalia, the cucullus of the new species (Figs 7–9) is nearly rectangular (in G. plumbitincta the cucullus is triangular, with the apex finely pointed; Fig. 10); the costal process is narrow, finger-shaped, reduced, bluntly round at apex (in G. plumbitincta the costal process is shorter, bifurcated, slightly curved); transtilla small (in G. plumbitincta large and triangle-shaped); the juxta with ventral-medial protrusion (in G. plumbitincta the ventral-medial protrusion is lacking); the vesica is strongly enlarged dorsad, with a long cornutus on the small submedial diverticulum, and with a row of long cornuti at the terminus (in G. plumbitincta the vesica is only slightly enlarged dorsad, and the median diverticulum is sclerotized apically, bears a cornutus, with 3–4 fine spinules close to the median diverticulum); the carina process bears 2–6 spines (in G. plumbitincta there are more than six spines). In the female genitalia, the new species (Fig. 11) has a large appendix bursae, and the corpus bursae is long and ovoid (in G. plumbitincta the corpus bursae is small and spherical; Fig. 12); the apophysis anteriores is approximately 4/7 the length of the apophysis posteriores (in G. plumbitincta it is almost 6/7 as long).

Description. Adult (Figs 1–4). Wingspan 34–37 mm, length of forewing 15–18 mm in male for three individuals; 36 mm and 16 mm in female for two individuals. Head and labial palpus dark greyish brown; antennae filiform in both sexes, dark brown to ochreous. Thorax dark greyish brown, collar and tegulae mixed with golden-orange scales. Forewing broadly triangular with acute apex, slightly concaved subapically at outer margin; ground color of forewing deep golden-red; cell, subterminal and terminal line areas, lower third of the basal part of inner margin area suffused with plumbeous grey to dark brown; basal patch distinct, dark brown, with a conspicuous white posterior spot; basal line dark, light red, doubled, excurved; antemedial line red, doubled, weakly excurved, and obviously bending at 2A, outer line of antemedial line darker and broader than inner line; median line red and thin, strongly excurved below the cell; postmedial line doubled, excurved at M 3 then almost straight reaching the inner margin ca. 2/3 from wing base, inner line of postmedial line black, distinct, outer line of postmedial line smokebrown, indistinct; subterminal line doubled, smoke-brown, waved, with more or less golden-orange scales between the inner and outer lines of the subterminal line, much larger in apex region whereas the rest narrow; terminal line greyish-white, narrow; fringe dark brown; orbicular spot large, rounded, golden-red encircled with black; reniform spot irregularly rectangle-shaped, golden mixed with orange, surrounded by black, with three white patches of different sizes on the posterior part; the dark streak between the orbicular and reniform spots is present. Hindwing ground color brownish grey, terminal line lighter than ground color; veins indistinct; terminal line cream color; discal spot indistinct. Abdomen brownish grey.

Male genitalia (Figs 7–9). Uncus narrow and weakly arc-shaped; pointed, hooked-shaped apically. Tegumen broad, with small square-shaped penniculi, hairy apically. Valva elongate, rounded at base then narrower; costa strongly sclerotized, reduced at middle part, swollen and protruded apically, with a slender, finger-shaped process that extending beyond ventral margin of valva; ampulla finger-shaped, slightly recurved; cucullus nearly rounded rectangular; sacculus triangular, strongly sclerotized, as wide as valva at its base; clasper sclerotized, straight, barshaped; harpe small, triangle-shaped. Vinculum robustly V-shaped. Juxta with a ventral-medial protrusion. Saccus broad, tongue-shaped. Aedeagus tube-shaped, distally weakly ventrad curved; caecum swollen, ca. 1/3 the length of aedeagus; carina sclerotized, with a row of 2–6 spines. Vesica membranous, obviously wrinkled, swollen at middle, and tapering to terminus; small submedial diverticulum with a long robust cornutus (lost in genit. prep. no. hhl- 4874-1 of a paratype, Fig 9), and with a row of long cornuti at terminus.

Female genitalia (Fig. 11). Ovipositor lobes strong, sclerotized conical, acute; apophysis posteriores rather narrow; apophysis anteriores robust, pointed terminally, approximately 4/7 the length of apophysis posteriores; ostium bursae broad, strongly sclerotized, funnel-shaped; ductus bursae long, wrinkled, strongly sclerotized, tapering from anterior to posterior part, with a medial protuberance; corpus bursae long oval-shaped, with four signa bands in central position; appendix bursae sclerotized, oval-shaped, densely covered with wrinkles.

Biology. Larvae attack the tender leaves and stalks of maize, and the attacked stalks always with distinct borer holes. The unnormal streaks, notches, holes, and the excreted frass can be seen when the infested stalks are unfolded, and they also are appearing in the growing tender leaves of affected plants (Figs 13–15).

Eight larvae were collected on 20 VI 2021 and reared on maize stalks in the laboratory. They began pupating on 20 VIII 2021; adults began to emerge from 6 IX 2021, giving three males and two females (Fig. 16).

Distribution. China (Guizhou Province).

Etymology. The specific name is named after the type locality in Guizhou Province, China.