FIGURE 2. The chewing organ as seen by modern workers. Images are modified from published illustrations as referenced, with revised or tentative generic assignments in brackets. A, Triebelina coronata (Brady, 1870) of Rome 1960, Fig. 2D [Glyptobairdia]; plate. B, Bairdia simuvillosa Swain, 1967, Fig. 32h [perhaps Neonesidea]; collar, plate, belt and both braces. C, Neonesidea sp. of Danielopol 1972, Fig. 2G; plate and coiled ring. D, Neonesidea manningi Maddocks, 1975, Fig. 1B; collar, plate, fragments. E, Triebelina aff. T. raripila (Müller, 1894) of Maddocks 1975, Fig. 5D; collar, plate, belt, proximal ends of braces. F, Aponesidea ifatyensis Maddocks, 1991, Fig. 2G; collar only. G, H, Mydionobairdia tulearensis Maddocks, 1991; G, Fig. 3C; H, Fig. 3B. G, collar, outer wall of ring with arched pattern, belt; H, plate with teeth and setules. I, Anchistrocheles darwini Maddocks and Iliffe, 1991, Fig. 5A; collar and outer wall of ring with arched pattern; the plate is crumpled and rotated almost 180°; it has overlapping teeth similar to those of Fig. J. J, Danipussella serpentina Wouters, 1988, Fig. 13; plate with distinctive, overlapping lamellar teeth. K, Bythocypris malyutinae Brandão, 2008, Fig. 32E; ventral view showing collar, inner wall of ring with rows of minute setules, pentagonal plate with multiple rows of marginal teeth, setules and blade ridge; part of chevron groove shows through from dorsal surface. L, Neonesidea gerda (Benson and Coleman, 1963) of Schulz 1976, Fig. 21; left lateral view of head capsule, esophagus and chewing structure. M, Bythocypris promoza Maddocks, 1973 of Schulz 1976, Fig. 26; left lateral view of head capsule. N, Anchistrocheles angulata (Brady, 1870) of Maddocks 1976, Pl. 7, fig. 1 [Orlovibairdia]; right lateral view of jawlike upper and lower lips and atrium.