Shingleton, Alexander W <br/><br/>
The origin of a mutualism: a morphological trait promoting the evolution of ant-aphid mutualisms.  [electronic resource] 

 -  Evolution; international journal of organic evolution  Apr 2005 
 - 921-6 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>0014-3820 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Ants--physiology<br/>Aphids--anatomy & histology<br/>Biological Evolution<br/>Body Weights and Measures<br/>Feeding Behavior--physiology<br/>Mouth--anatomy & histology<br/>Symbiosis<br/>United Kingdom