エーギロカシスは海中に住んだ？
Aegirocassis is an extinct genus of anomalocarid arthropod belonging to the family Hurdiidae that lived 480 million years ago during the early Ordovician. It is known by a single species, Aegirocassis benmoulai. A fossil of "A. benmoulai" from the Fezouata biota, Morocco was discovered by and named after Mohamed Ben Moula, a fossil collector who recognized its rare characteristics and brought it to the notice of a professional paleontologist, Peter Van Roy, at the Ghent University in Belgium. 
Van Roy initiated scientific study of the fossil, the earliest known of a "giant" filter-feeder discovered to date. "Aegirocassis" is considered to have evolved from early predatory anomalocarids. At the time of its existence, "A. benmoulai" was possibly the largest animal in the world. The length was described as exceeding in the scientific journal "Nature".
no