Xystodesmus amoenus

Xystodesmus amoenus (Takakuwa, 1942) Figs 3A, 15 Koreoaria amoena Takakuwa, 1942a: 362–363, 366, fig. 5. Koreoaria amoea (recte amoena) – Tanabe & Shinohara 1996: 1487 (“species possibly belonging to Xystodesmus ”). — Marek et al. 2014: 71. Koreoaria amoena – Lim 2001: 129–131, fig. 145. Xystodesmus amoenus – Korsós & Nakamura 2025: 218, fig. 15a. Diagnosis A species of Xystodesmus as defined by Tanabe & Shinohara (1996) and Korsós & Nakamura (2025) by its small size and colouration already described by Takakuwa (1942a). Without fresh material, the shape of the gonopods can only be studied based on the figure provided by Takakuwa (1942a: 362, fig. 5, redrawn here as Fig. 3A, and in Korsós & Nakamura 2025: 218, fig. 15a). Acropodite (Fig. 3A: a) amidst with a broad, leaflike lamina ending in a small point (Fig. 3A: b), its distal part bent at almost right angle back to prefemoral process, which is slender and curved. Type material (not examined) SOUTH KOREA • 1 ♂; “Taikyu (Süd-Korea)” (= Daegu, South Korea); Takakuwa’s private collection, including type material of many species, considered lost (Tanabe & Shinohara 1996; Chao & Chang 2008). Description Without the type material and fresh specimens, we can only rely on Takakuwa’s (1942a: 366) description: “Rücken graulich, Kopf, Antennen und Bauch gelb, Bein proximal etwas graulich, distal gelb. Seitenflügel mit einem deutlich rötlichen Fleck.” (= “Back greyish, head, antennae and belly yellow, legs proximally somewhat greyish, distally yellow. Paranota with a clear reddish spot.” – translated from German). Female unknown. Distribution Known only from its type locality (Daegu, South Korea; Takakuwa 1942a) (Fig. 15). Remarks In our present material we did not find any Xystodesmus in or around Daegu, which is now a huge metropolis. The original figure is quite schematic, and the description is short (Takakuwa 1942a: 362, fig. 5), but other somatic characters, such as size and colouration, are definitely implying the species’ position in Xystodesmus, as already stated by Korsós & Nakamura (2025).