Singulus Yao & Yu 2025, gen. nov.

Overview & Synopsis

Singulus Yao & Yu gen. nov.Figs 1–6, 7–15Type species.Singulus furcatus Yao & Yu, sp. nov. here designated.Diagnosis.The new genus is similar to Alafrasca Lu & Qin, 2014, Lumicella Lu & Qin, 2013, Schizandrasca Anufriev, 1972, and Circinans Qin & Liu, 2014 in that the CuA veins of hindwings are branched (Fig. 6), but the new genus differs from the above genera by the following characters: the subgenital plate is triangular with a broad base and only one large seta (Figs 8, 10). Alafrasca Lu & Qin differs from the new genus in lacking an anal process branching at the apex (Lu and Qin 2014 b). Lumicella Lu & Qin differs from the new genus in the following aspects: the subgenital plate is not triangular, the paramere is slim, and the apophysis bears a prominent dentifer (Lu et al. 2013). Schizandrasca Anufriev, 1972 differs from the new genus in lacking a paired aedeagus processes (Anufriev, 1972 a). Circinans Qin & Liu differs by the anal process with a broad and extended caudad (Lu and Qin 2014 a).Description.Body slender (Figs 1–4). Crown nearly as wide as pronotum, middle length of crown less than distance between eyes, a black spot in middle of vertex, with ocelli. Coronal suture present and not reaching anterior margin of crown. Pronotum with anterior margin arcuate, angles on both sides of mesoscutellum are black, scutoscutellar sulcus not reaching both margins (Figs 1, 4). Face larger than wide, elevated in lateral view (Figs 2, 3). Forewing RP and MP′ veins stalked at base, arising from r cell, r cell longest, r cell and m cell subequal in width, 1 st apical cell largest, followed by 4 th apical, 3 rd apical triangular, which is about one-third of wing length (Fig. 5). Hindwing CuA vein branched, and branch point located on or at intersection of CuA and MP′ ′ veins (Fig. 6).Abdominal apodemes bursts, slender, parallel (Fig. 7). Male genitalia broad, pygofer without process, posterior margin bluntly rounded, with fine setae (Figs 8, 9). Subgenital plate triangular, broad at base, narrowing to tip, with 1 macrosetae (Fig. 10). Apex of paramere is apical, fine setae distributed in subapical, tip without teeth (Figs 12, 15). Aedeagus curved in lateral view, with paired process, without dorsal apodeme, preatrium well developed (Figs 12, 13). Anal process developed, slender, curved toward apex in an arc, exceeding posterior margin of pygofer, proximal with an indentation (Figs 9, 11). Connective not developed (Figs 12, 13).Etymology.The new genus is named after the subgenital plate of males with only 1 macroseta.Distribution.Oriental.