spine base造句

• Additionally the neural spine base is transversely constricted.
• A low dorsal fin fold originates just posterior of the spine tip while a deeper ventral fin fold originates below the spine base.
• The specific name means " hollowed out " in Latin and refers to two large depressions, one each on either side of the spine base.
• Ridges extend to the rear from the sides of the neural spine base, over the upper sides of the rear joint processes, the prezygapophyses to the contrary, are much shorter; they have a notch at the front upper edge.