Pneumatic fossae are present only in the second caudal vertebra in several specimens of Giraffatitan.

Caudal vertebra 2 from the MB.R.2921 (‘Fund Aa’) is shown here in right lateral (left) and left lateral (right) views. Small pneumatic fossae (f) are present on both sides of the centrum, but absent in the rest of the tail. The same pattern of pneumaticity is present in MB.R.3736 (‘Fund D’) and, according to Janensch [57], in the caudal series from the ‘Fund G1’ quarry.