Xystodesmus amoenus (Takakuwa, 1942), 2025

Xystodesmus amoenus (Takakuwa, 1942) comb. nov.

Fig. 15 A View Figure 15

Koreoaria amoena Takakuwa, 1942 b: Daegu, South Korea ( Takakuwa 1942 b: 362 –363, fig. 5) View in CoL

Koreoaria amoea (sic!): Tanabe and Shinohara 1996: 1487: (“ species possibly belonging to Xystodesmus View in CoL ”)

Koreoaria amoea (sic!): Marek et al. 2014: 71

Descriptive notes

based on Takakuwa (1942 b: 366). Body length 22 mm, width 4 mm. Male gonopod with two processes (Fig. 15 A View Figure 15 , redrawn from Takakuwa 1942 b:. 362, fig. 5), the femoral process continues in tibiotarsus (a) with a small tooth (b), taking the seminal groove all along to the end bending backwards (acropodite); whereas the other shorter and thinner process is the prefemoral process (“ Prefemoralfortsatz ”).

Colouration.

Without the type material and fresh specimens, we can only rely on Takakuwa’s description (1942 b: 366): “ 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 clearly reddish spot.] The important part is the last sentence, which is again in total agreement of Xystodesmus characters.

Remarks.

Type material could not be studied since Takakuwa’s private collection, including type material of many species, is considered lost ( Tanabe and Shinohara 1996; Chao and Chang 2008).