Figures 1-4 from: Isola TE, Varisco MA, Cazzaniga NJ (2018) Implanted byssal hairs on postlarval shells of Mytilus edulis platensis (Bivalvia: Mytilidae) from Patagonia. Zoologia 35: 1-5. https://doi.org/10.3897/zoologia.35.e21978

Figures 1-4 Postlarvae of Mytilusedulisplatensis: (1) outer view of a postlarva 400 µm long, with an eye spot (ES) and naturally deprived of adventitious hairs; (2) inner view of a postlarval shell; (3) general view of an 850 µm long shell – a marked growth line delimits the prodissoconch II; (4) close up of the umbo of an 850 µm long shell. (LI) Larval ligament, (Pr) provinculum (hinge), (PrT) provincular or primary teeth, (PTI) posterior teeth I. Figures 2–4 are SEM micrographs; the periostracum was previously removed.