Falcitornoceratinae

Falcitornoceratinae is one of three subfamilies of the Tornoceratidae family, a member of the Goniatitida order. Shells produced are extremely involute and have no umbilicus. Young and intermediate whorls have ventrolateral grooves. The adventitious lobe, which develops ontogenetically between the external, or ventral, and lateral lobes, is widely...
Found on http://en.wikipedia.org/wiki/Falcitornoceratinae
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