“COSTA” на російській мові

It resulted in outgrowths and duplications of the costa region of the wing.

The forewings generally are reduced to the region immediately adjacent to the costa , having separated along the radius and cubitus veins.

The main part of the shell is coarsely commarginally lamellose and lacks radial costae .

Wall thickness is 10-26 m, becoming thicker at the corners of the chamber where it may bulge outwardly to produce coarse longitudinal costae .

The internal molds are smooth with exception of traces of the concentric costae on the rostral face.