Fig. 2. Larval Crassicauda spp. a, b in Morphological and molecular characterization of adults and larvae of Crassicauda spp. (Nematoda: Spirurida) from Mediterranean fin whales Balaenoptera physalus (Linnaeus, 1758)

Fig. 2. Larval Crassicauda spp. a, b) Cephalic and caudal end of larvae from intestinal nodules (a, bar = 40 μm; b, bar = 60 μm). c, d. Cephalic and caudal end of larvae isolated from mesenteric arteries wall (c, bar = 25 μm; d, bar = 65 μm). In a and c the black arrow indicates lips with terminal tooth, while in b and d black arrow indicates the anus. e, f) Cephalic and caudal end of larvae isolated from intestinal lumen, with caudal papillae visible in f (black arrow) (e, bar = 60 μm; f, bar = 70 μm).