Complex sentence: Whorls in "Litoceras" have a broadly rounded cross section with the width greater than the height and somewhat resembles the tarphyceratid "Pionoceras" from the same time, except for the siphuncle being dorsal and at the center.
Split into simpler sentences: Whorls in "Litoceras" have a broadly rounded cross section with the width greater than the height. Litoceras somewhat resembles the tarphyceratid "Pionoceras" from the same time, except for the siphuncle being dorsal and at the center.