Fig. 12

Displays a semithin section of the gill filament and secondary gill lamella of the Ruby-Red-Fin Shark, formally identified as Epalzeorhynchos frenatum, a species belonging to the Teleostei: Cyprinidae family. The gill arch is upheld by cartilage containing chondrocytes, situated within a lacuna surrounded by a cartilage matrix (asterisk). Telocyte-like cells (shown by the arrow) are present in the epithelia of the gill arch. These cells are generated within the wall of the lymph space (L). Granular rodlet cells, shown by arrowheads, are situated within the lymphatic space. The secondary gill lamella comprises pillar cells between the blood capillaries. The secondary gill lamella is enveloped by pavement cells