Aethiosolen is an orthocerid genus in the family Orthoceratidae with an annulated orthoconic shell. Annuli, transverse elevations on the shell, are broad and of low amplitude with spacings in the range of 4 to 6 mm and height of less than 1 mm. Camerae (chambers) are short, septal spacing on the order of 3 to 4 mm. The siphuncle is wide and tubula...
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