| Brain and Nervous System (SEE ALSO: Sense Organs) | 
				
				
				
				
					
					|  | x |  |  | 1990 | O'Shea & Reep (encephalization quotients & life history; 534-543.) |  | 
				
				
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					| Dugong dugon (Müller, 1776) Palmer, 1895 | 
				
				
				
				
					
					|  | x |  | * | 1990 | O'Shea & Reep (encephalization quotients & life history; 534-543.) |  | 
				
				
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					| Embryology and Ontogeny (SEE ALSO: Age Determination; Growth Rates; Teratology) | 
				
				
				
				
					
					|  | x |  |  | 1990 | O'Shea & Reep (TML; brain & body size, fusion of cranial sutures; 534-543.) |  | 
				
				
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					| Eotheroides Palmer, 1899 | 
				
				
				
				
					
					|  | x |  |  | 1990 | O'Shea & Reep (brain & body size; 536, 539.) |  | 
				
				
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					| Growth Rates | 
				
				
				
				
					
					|  | x |  |  | 1990 | O'Shea & Reep (wild TML; Florida; brain & body size; 535-541.) |  | 
				
				
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					| Hydrodamalis gigas (Zimmermann, 1780) Palmer, 1895 | 
				
				
				
				
					
					|  | x |  |  | 1990 | O'Shea & Reep (encephalization quotients & life history; 534-543.) |  | 
				
				
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					| Prorastomus Owen, 1855 | 
				
				
				
				
					
					|  | x |  |  | 1990 | O'Shea & Reep (body size; 539.) |  | 
				
				
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					| Protosiren Abel, 1907 | 
				
				
				
				
					
					|  | x |  |  | 1990 | O'Shea & Reep (brain; 536.) |  | 
				
				
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					| Skeleton (SEE ALSO: Age Determination; Embryology and Ontogeny; Histology; Myology; Sense Organs; Tooth Replacement; and under species) | 
				
				
				
				
					
					|  | x |  |  | 1990 | O'Shea & Reep (TML; body size & fusion of cranial sutures; 539-540.) |  | 
				
				
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					| Trichechus manatus Linnaeus, 1758 | 
				
				
				
				
					
					|  | x |  | * | 1990 | O'Shea & Reep (encephalization quotients & life history; 534-543.) |  | 
				
				
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