Iacra seychellarum (A. Adams, 1856)

Albano, Paolo G., Steger, Jan, Bakker, Piet A. J., Bogi, Cesare, Bosnjak, Marija, Guy-Haim, Tamar, Huseyinoglu, Mehmet Fatih, LaFollette, Patrick I., Lubinevsky, Hadas, Mulas, Martina, Stockinger, Martina, Azzarone, Michele & Sabelli, Bruno, 2021, Numerous new records of tropical non-indigenous species in the Eastern Mediterranean highlight the challenges of their recognition and identification, ZooKeys 1010, pp. 1-95 : 1

Iacra seychellarum (A. Adams, 1856) Figure 43

New records.

GREECE • 3 vv; Kos Island; 2005-2010; A. Storm leg.; RMNH.MOL.342632; size: L 12.1 mm, H 9.8 mm.

Remarks.

We here report the finding of three beached valves of Iacra seychellarum in Kos, Greece. Iacra seychellarum can be readily distinguished from any Mediterranean semelid by its thick valves, large chondrophore and different sculpture in three zones: anterior with fine incised concentric lirations, median to posterior slope of fine incised oblique lines becoming strongly divaricate over the posterior slope, posterior area with closely spaced concentric incised lirations ( Oliver 1992; Zuschin and Oliver 2003). It has been recorded from the northern Red Sea by Blatterer (2019) but has a broader distribution in the Indian Ocean ( Oliver 1992). Because to our knowledge the finding has not been followed by others, we suggest that living individuals are needed to confirm the introduction and establishment of this species in the Mediterranean Sea.

Figures

Figure 43. Iacra seychellarum (A. Adams, 1856), Kos Island, Greece, RMNH. MOL. 342632: left valve outer (A) and inner (B) views, hinge (C). Photograph courtesy T. van Haaren. Scale bar: 2 mm (A, B); 1 mm (C).