fastigate造句

The venter has a narrow keel and may be fastigate, like a gable roof.
The shell of " Petitclercia " is involute, very compressed, with a sharp umbilical angle and sharp fastigate venter.
Many possess ventral chevrons and / or a fastigate venter resembling a gable roof, which in some develops into a true keel on the outer whorls.
Upon determination of the secondary metabolite, divaricatic acid, " Niebla testudinaria " can be recognized by the crooked wide-spreading branches, which become shortly divided near apex, in contrast to " N . homalea " with fastigate branches that often have terminally divided branches of unequal length.
""'Fournierella " "'is a member of the Muniericeratidae, a family of Upper Cretaceous ammonites characterized by moderately evolute shells with strong sinuous ribs that have tubercles on the shoulders and umbilical edge, and a more or less fastigate cross section ( venter sloping on either side like a gable roof ), included in the Desmocerataceae.
It's difficult to find fastigate in a sentence. 用fastigate造句挺难的

The prevailing consensus is these are three distinct genera . " Dorsetensia " and " Witchellia " are separated on both morphologic and stratigraphic grounds . " Witchellia " is from the middle Lower Bajocian Laeviuscula subzone, Sowebvyi Zone and has a distinct tabulate venter even in smooth involute forms . " Dorsetensia " is from the middle Bajocian Humphriesianum Zone and has a narrow fastigate ( pitched roof ) venter.