. Breviora. 1971 BRAZILIAN CHARACIN FISH 11 premaxillary and maxillary firmly embedded in a tough connective tissue that binds them to tip of ethmoid although they do not con- tact it. Maxillary with dorsoposterior corner expanded and con- nected by a broad, strong ligament to palatine (Fig. 2). Maxillary bearing a short segment of cephalic sensory canal (Fig. 5). Dentary with a slender, median symphyseal process, round in cross section, blunt at the tip which approximates and is strongly joined by ligaments to its opposite fellow. Tooth-bearing portion of dentary elevated; rictal membrane att
. Breviora. 1971 BRAZILIAN CHARACIN FISH 11 premaxillary and maxillary firmly embedded in a tough connective tissue that binds them to tip of ethmoid although they do not con- tact it. Maxillary with dorsoposterior corner expanded and con- nected by a broad, strong ligament to palatine (Fig. 2). Maxillary bearing a short segment of cephalic sensory canal (Fig. 5). Dentary with a slender, median symphyseal process, round in cross section, blunt at the tip which approximates and is strongly joined by ligaments to its opposite fellow. Tooth-bearing portion of dentary elevated; rictal membrane attaches maxillary to lateral surface of elevated portion of dentary. Portion of dentary pos- terior to gape gradually diminishing in width, about twice as long as portion anterior to rictus; articulation with quadrate beneath infraorbitals supraorbital antorbital premaxillary. ope re Ie subopercle maxillary interopercle preopercle quadrate angular articular dentary Figure 5. Jaws and facial bones of Micromischodiis siigiUatiis (lateral view). middle of eye. Elevated portion of dentary with a peculiar fenestra below part of the tooth rows (Figs. 5-7); a fenestra identical in shape and position occurs in the toothless dentary of Hemiodus but is lacking in chilodontids. Premaxillary with about 14 minute moveable teeth. Maxillary toothless. Dentary with two coextensive rows of minute moveable teeth. The 125-mm specimen has about 54 teeth in outer row and about 60 (slightly smaller) teeth in inner row, uppermost ten. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
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