Tetranemertes unistriata Cherneva, Ellison, Zattara, Norenburg, Schwartz, Junoy, and Maslakova 2023

Tetranemertes unistriata Cherneva, Ellison, Zattara, Norenburg, Schwartz, Junoy, and Maslakova, 2023 (Fig. 6A–E) Tetranemertes unistriata Cherneva et al., 2023: 188, fig. 7A–H. Remarks. Tetranemertes unistriata was established based on specimens from Oman and Japan (COI p -distance is 3.3%) (Table 2), the latter was found among calcareous algae taken on Engetsu Island, Shirahama, Japan (Cherneva et al. 2023). It is one of two congeners that has a mid-dorsal reddish stripe (Fig. 6A, D, E), the other being T. rubrolineata. The body color in life varies from pale yellowish orange to pale pink. A pair of ventral anterior cephalic furrows nearly fused mid-ventrally to form a shallow ‘Λ,’ with the corner directing anteriorly (Fig. 6B). The central stylet basis is cylindrical and deeply forked posteriorly (Fig. 6C).