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Angel de la Guarda, Isla Baja California, Estado de Mexico, Mexico
latitude: 29.3333
longitude: -113.416702
Precision of location: Alexandria Digital Library (with NGA GNDB data)
Site Named Here: By name of island, bay, strait, lake, river, or stream, etc., named in source publication
| Zygantroplana stylifera | Apr 2-3, 1940 | intertidal | rock | Collected by Ricketts rocky littoral. Hyman notes that Ricketts referred to this species as Stylochoplana plenhi. |
| Alleena mexicana | Jan 1940 |