Gastrohoplites

Gastrohoplites is a hoplitid genus of ammonite included in the Gastrohoplinae from Middle Albian age marine strata in western North America and parts of Europe. The shell of Gastrohoplites is variably involute to evolute. Sides and venter are flat, shoulders sharp. Ribs more or less prominent, coarse, branch from above the umbilical border, and st...
Found on http://en.wikipedia.org/wiki/Gastrohoplites
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