01098nas a2200133   4500008004100000245004500041210004400086300001200130490000700142520073900149653001700888100001900905856004000924       1958                        eng d00aPolylopia Clark, an Ordovician Scaphopod0 aPolylopia Clark an Ordovician Scaphopod  a144-1460 v323 a<div>
<div>Restudy of the previously unassigned narrow conical genus Polylopia Clark discloses that it bears features which ally it most closely with the Scaphopoda. These are: (1) possession of a multi-layered wall, (2) presence of external longitudinal ribbing, and (3) truncation of the gradually tapering narrow cone. Characteristics diagnostic of other kinds of narrow conical shells as tentaculitids, styliolinids, hyolithids, conularids, pteropods, cephalopods, or worms are lacking and placement in any of these groups is not supported by the evidence at hand. The suggested placement of Polylopia in the Scaphopoda extends the stratigraphic range of this group in North America back to the Middle Ordovician.</div>
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10apaleontology1 aFisher, D., W.  uhttp://www.jstor.org/stable/1300650