Comparison of the Nasal Olfactory Organs of Various Species of Lizardfishes (Teleostei: Aulopiformes: Synodontidae) with Additional Remarks on the Brain

Figure 2

Olfactory rosettes and their lamellae with olfactory neurons. (a) The olfactory rosette of Saurida macrolepis, scale bar = 0.8 mm; (b) lateral aspect of isolated lamellae of Synodus variegatus, scale bar = 100 𝜇m; (c) longitudinal section of lamellae of S. gracilis, featuring olfactory fibers and nerve in the raphe, scale bar = 60 𝜇m; (d) exposed brain, olfactory nerves and rosettes of S. tumbil, scale bar = 2.4 mm (inset 1, longitudinal section of the ON; inset 2, cross section of the same; scale bars = 100 𝜇m, LM); (e) olfactory rosette of S. gracilis, scale bar = 1 mm; (f) the rim of an olfactory lamella of Sy. variegatus, scale bar = 8 𝜇m; (g) rows of ciliated cells on lamellae of the same, scale bar = 4 𝜇m. (h) mosaic of ORN on a lamellae of S. tumbil, scale bar = 12 𝜇m; (i) isolated ORN of Trachinocephalus myops, scale bar = 2.6 𝜇m; (j) Kinocilia-cells at the base of olfactory lamellae of S. macrolepis, scale bar = 4 𝜇m. b, boundless of neural filaments; c, cilia of ORN; kl, kinocilia; l,olfactory lamellae; ll, largest lamella; mi, microvillar cells; mr, microridges on cell surfaces; nf, neural fibrille; nl, nerve-bundles in olfactory lamellae; nr, nerve branch in the raphe; on, olfactory nerve; or, olfactory rosettes; osn, cilia of olfactory sensory neurons; sl, smallest lamellae; ra, raphe of rosette; triangles, sensory epithelium (C and insets, LM; all other SEM).