axis vertebra การใช้

• It is a very flat, non functional structure that sits just behind the axis vertebra and abruptly narrows to a fine point terminating at the 9th duct like process stemming from the ventral surface unlike other species of the family " Sillaginidae ".
• The first specimen ( the holotype ) is a fragmentary skeleton including parts of the back of the skull, pieces of teeth and ribs, an axis vertebra, a dorsal vertebra, three neural spines, the ends of both humeri and a partial hip.
• Passing backward, above the eighth cervical nerve and between the transverse process of the seventh cervical vertebra and the neck of the first rib, it runs up the back of the neck, between the semispinalis capitis and semispinalis cervicis, as high as the axis vertebra, supplying these and adjacent muscles, and anastomosing with the deep division of the descending branch of the occipital, and with branches of the vertebral.
• Several anatomical features identifies " Carolinacetus " as a protocetid ( and therefore as a member of Pelagiceti ) including : external nares are located above the canine, the supraoccipital ( in cetaceans, the part of the occipital bone located above the foramen magnum and directed backwards ) is narrow and tubular, accessory cusps absent on M 3, a broad connection between the ectotympanic axis vertebra with large vertebral foramen.