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Posted: Oct 25 2016
Glycymeris undata (Linnaeus, 1758), Atlantic Bittersweet
![Glycymeris undata 1](https://static.wixstatic.com/media/04fdd9_081b20eca2224ba993f8117f6d4e302d~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_081b20eca2224ba993f8117f6d4e302d~mv2.jpg)
Glycymeris undata 1
![Glycymeris undata 2](https://static.wixstatic.com/media/04fdd9_dbd90f81e8624e45bedd8f42fcc22c5a~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_dbd90f81e8624e45bedd8f42fcc22c5a~mv2.jpg)
Glycymeris undata 2
![Glycymeris undata 3](https://static.wixstatic.com/media/04fdd9_3a170b363bb04fd2bc92f33de181d368~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_3a170b363bb04fd2bc92f33de181d368~mv2.jpg)
Glycymeris undata 3
![Glycymeris undata 4](https://static.wixstatic.com/media/04fdd9_2c26c16910c8433d98b9894e76959320~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_2c26c16910c8433d98b9894e76959320~mv2.jpg)
Glycymeris undata 4
![Glycymeris undata 5](https://static.wixstatic.com/media/04fdd9_2ae4969635954265819ebadfdf207b9f~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_2ae4969635954265819ebadfdf207b9f~mv2.jpg)
Glycymeris undata 5
![Glycymeris undata 6](https://static.wixstatic.com/media/04fdd9_9e543d2890ac46a8a952a01294cba5e8~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_9e543d2890ac46a8a952a01294cba5e8~mv2.jpg)
Glycymeris undata 6
![Glycymeris undata 7](https://static.wixstatic.com/media/04fdd9_6d75fab397e544e98c028872be2af5e8~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_6d75fab397e544e98c028872be2af5e8~mv2.jpg)
Glycymeris undata 7
![Glycymeris undata 8](https://static.wixstatic.com/media/04fdd9_f97659098021437c9683ee6da7c31654~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_f97659098021437c9683ee6da7c31654~mv2.jpg)
Glycymeris undata 8
![Glycymeris undata 9](https://static.wixstatic.com/media/04fdd9_10b2b3d2096f449ca3d0b96a9b766eac~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_10b2b3d2096f449ca3d0b96a9b766eac~mv2.jpg)
Glycymeris undata 9
![Glycymeris undata 10](https://static.wixstatic.com/media/04fdd9_313f85b22e4d48f9ad9a08083692f328~mv2.jpg/v1/fill/w_147,h_82,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_313f85b22e4d48f9ad9a08083692f328~mv2.jpg)
Glycymeris undata 10
![Glycymeris undata 11](https://static.wixstatic.com/media/04fdd9_21723fd433b54ba0951f998295c35068~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_21723fd433b54ba0951f998295c35068~mv2.jpg)
Glycymeris undata 11
![Glycymeris undata 12](https://static.wixstatic.com/media/04fdd9_d7bd1f4e5ad644fda4e5eb9d7644f400~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_d7bd1f4e5ad644fda4e5eb9d7644f400~mv2.jpg)
Glycymeris undata 12
![Glycymeris undata 13](https://static.wixstatic.com/media/04fdd9_b1cbeb13d54b4b80bdda62a3f8a7eca3~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_b1cbeb13d54b4b80bdda62a3f8a7eca3~mv2.jpg)
Glycymeris undata 13
![Glycymeris undata 14](https://static.wixstatic.com/media/04fdd9_bf43cd910e0b45e78f8ebe15181e3306~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_bf43cd910e0b45e78f8ebe15181e3306~mv2.jpg)
Glycymeris undata 14
![Glycymeris undata Venezuela 15](https://static.wixstatic.com/media/04fdd9_aee0b1bc3fe54b00a6ab618f5928666d~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_aee0b1bc3fe54b00a6ab618f5928666d~mv2.jpg)
Glycymeris undata Venezuela 15
![Glycimerids 1](https://static.wixstatic.com/media/04fdd9_e26bc2b10bdb43c3812e9f6b6532ef1f~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_e26bc2b10bdb43c3812e9f6b6532ef1f~mv2.jpg)
Glycimerids 1
![Glycimerids 2](https://static.wixstatic.com/media/04fdd9_d2e5cdd79034433fba3bfac38dad6eb0~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_d2e5cdd79034433fba3bfac38dad6eb0~mv2.jpg)
Glycimerids 2
![Glycimerids 3](https://static.wixstatic.com/media/04fdd9_33cbcc38e9c04d1eb5f9162844043d4d~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_33cbcc38e9c04d1eb5f9162844043d4d~mv2.jpg)
Glycimerids 3
![glycymerids_1](https://static.wixstatic.com/media/04fdd9_4950ab0e685245df8007b48d264723fb~mv2.jpg/v1/fill/w_147,h_93,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/04fdd9_4950ab0e685245df8007b48d264723fb~mv2.jpg)
glycymerids_1
Acknowledgements:
Many thanks to José H. Leal, Director of The Bailey-Matthews Shell Museum, and G. Thomas Watters, Curator of Molluscs, The Ohio State University Museum of Biological Diversity, for loan of their collections of Glycimerids, and to Dan Teven for providing specimens of the difficult to obtain G. undata. And, thanks to those others who reviewed their collections in an attempt to reply to my appeal on Conch-L and provide specimens of G. undata.
![Glycymeris 1.jpg](https://static.wixstatic.com/media/04fdd9_a69bbcbe4ba745f59210435d6d598937~mv2.jpg/v1/fill/w_135,h_182,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/Glycymeris%201.jpg)
![Glycymeris 2.jpg](https://static.wixstatic.com/media/04fdd9_037f695eb14e4647a74e74c24006b477~mv2.jpg/v1/fill/w_136,h_184,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/Glycymeris%202.jpg)
![Glycymeris 3.jpg](https://static.wixstatic.com/media/04fdd9_948698fc34f44793b2a28ac49093e63f~mv2.jpg/v1/fill/w_136,h_184,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/Glycymeris%203.jpg)
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