FIGURE 17 in New fossil mussels (Bivalvia: Mytilidae) from Miocene hydrocarbon seep deposits, North Island, New Zealand, with general remarks on vent and seep mussels

FIGURE 17. Diagram comparing relative maximum sizes reported* in modern species of the genus Gigantidas Cosel and B. Marshall, 2003 (thin-lined boxes), against the largest specimen** of G. c o s e li sp. nov. (specimen L4212). Mean maximum size (H = 43.7 mm, L = 197.7 mm) and H/L ratio (0.22) for genus shown by dashed lines. Faded background images are of largest specimen of both described modern species, G. gladius Cosel and B. Marshall, 2003 (H = 54.1 mm, L = 316.0 mm) and G. horikoshii Hashimoto and Yamane, 2005 (H = 49.1 mm, L = 177.8 mm). These holotype images are slightly distorted to fill the dimensions of the largest specimen of each species reported, modified from Cosel and Marshall (2003: fig. 25) and Hashimoto and Yamane (2005: fig. 8). H: shell height; L: shell length.