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・ Lambdotherium
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Lambeoceras
・ Lambeosaurinae
・ Lambeosaurini
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・ Lambert (lunar crater)
・ Lambert (Martian crater)


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Lambeoceras : ウィキペディア英語版
Lambeoceras

''Lambeoceras'' is a rather large actinocerid with a convexly lenticular cross section from the Upper Ordovician of North America, and the sole representative of the family Lambeoceratidae.
==Morphological description==
''Lambeoceras'' is of medium to moderately large size with a long straight depressed shell, broad in cross section with the dorsum and venter both about equally convex, meeting acutely along the sides. Chambers are short, septa close spaced, forming broad lobes on the upper and lower sides which meet in sharp saddles along the sides. The siphuncle is submarginal, near the ventral side and relatively narrow. Septal necks are extremely long, brims short and recumbent. Segments are broadly expanded, connecting rings thin. Radial canals within the siphuncle from broad arcs that may bifurcate close to the parispatium.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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