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![Eastern spadefoot pond (Sandhills, NC).j](https://static.wixstatic.com/media/d9e371_cfdce6381a0146b4ad8239417707733f~mv2.jpg/v1/fill/w_1470,h_445,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/Eastern%20spadefoot%20pond%20(Sandhills%2C%20NC)_j.jpg)
Nicholas A. Levis
Ecological, Evolutionary, Developmental Biologist
Department of Biology
Indiana University, Bloomington, IN, USA
![Nematode mouth plasticity](https://static.wixstatic.com/media/d9e371_1e9521fbb9f6406aa2534a56d3d35c91~mv2.jpg/v1/fill/w_980,h_844,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/d9e371_1e9521fbb9f6406aa2534a56d3d35c91~mv2.jpg)
Nematode mouth plasticity
Narrow-mouth (top) and wide-mouth (bottom) morphs of the nematode Pristionchus pacificus.
![Spea bombifrons cannibal](https://static.wixstatic.com/media/d9e371_ab34112439664f7daf5cc51a2c3a2ae0~mv2_d_2902_2567_s_4_2.jpg/v1/fill/w_980,h_867,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/d9e371_ab34112439664f7daf5cc51a2c3a2ae0~mv2_d_2902_2567_s_4_2.jpg)
Spea bombifrons cannibal
Photo credit: David Pfennig
![Spotted salamanders](https://static.wixstatic.com/media/d9e371_e1dfbebc24ff46b2a0dbed41be4c3b00.jpg/v1/fill/w_980,h_923,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/d9e371_e1dfbebc24ff46b2a0dbed41be4c3b00.jpg)
Spotted salamanders
![Nematode mouth plasticity](https://static.wixstatic.com/media/d9e371_1e9521fbb9f6406aa2534a56d3d35c91~mv2.jpg/v1/fill/w_980,h_844,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/d9e371_1e9521fbb9f6406aa2534a56d3d35c91~mv2.jpg)
Nematode mouth plasticity
Narrow-mouth (top) and wide-mouth (bottom) morphs of the nematode Pristionchus pacificus.
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