e/Lissodus

Information
has gloss	eng: Lissodus is an extinct genus of freshwater shark. It lived about 225 million years ago during the late Triassic period. It was about 15 cm long (6 inches) and had flat teeth that it used for eating clams .
lexicalization	eng: Lissodus
instance of	(noun) any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales shark