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

Abato, Jamael C., Hookabe, Natsumi & Kajihara, Hiroshi, 2025, Species Diversity of Tetranemertes (Nemertea: Monostilifera) in Japan, Species Diversity 30 (1), pp. 71-83 : 78

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 ).

Figures

Fig. 6. Tetranemertes unistriata Cherneva et al., 2023, drawings made by Svetlana A. Maslakova based on three specimens collected from among calcareous algae taken at Engetsu Island, Shirahama, Wakayama, Japan in July 1999. Reproduced from Cherneva et al. (2023: fig. 7A–E). © 2023 Irina Cherneva et al. (CC BY 4.0).