Comparison between Musculus aff. viridulus (H. Adams, 1871) and Musculus costulatus (Risso, 1826) A–E Musculus aff. viridulus, west of Rosh HaNikra Islands, Israel, HELM project (sample S52_3L): left valve outer (A, B) and inner (D) views, right valve inner (C) and outer (E) views F–H Musculus aff. viridulus, dive site “Caves”, Dahab, Sinai, Egypt: left valve outer (F, G) and inner (H) views I–M Musculus costulatus, west of Rosh HaNikra Islands, Israel, HELM project (sample S53_2L): left valve outer (I, J) and inner (L) views, right valve inner (K) and outer (M) views. Scale bars: 1 mm.

 
 
  Part of: Albano PG, Steger J, Bakker PAJ, Bogi C, Bošnjak M, Guy-Haim T, Huseyinoglu MF, LaFollette PI, Lubinevsky H, Mulas M, Stockinger M, Azzarone M, Sabelli B (2021) Numerous new records of tropical non-indigenous species in the Eastern Mediterranean highlight the challenges of their recognition and identification. ZooKeys 1010: 1-95. https://doi.org/10.3897/zookeys.1010.58759