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La Ortava Tenerife, Canary Islands (Puerto de la Cruz; Puerto Ortava, Puerto Orotava), Spain
latitude: 28.233334 28 14 N
longitude: -16.583332 16 35 W
Precision of location: Gauged from chart or map
Site Named Here: By name of site (or city, etc.)
| Convoluta bimaculata | prior to 1882 | intertidal | beach | feeds on diatoms |
| Convoluta convoluta | 1902 | littoral | ||
| Convoluta langerhansi | prior to 1882 | intertidal | beach, rock | under rock |
| Monocelis fasciata | prior to 1911 | found in Ulva intestinalis in a tide pool behind the Hotel Martianez. | ||
| cochlear cochlear | 1913 or earlier | |||
| setigerum setigerum | 1913 or earlier | |||
| Polycystis naegelii | 1913 or earlier | living among plants in the litoral zone. | ||
| Polycystis crocea | 1913 or earlier | |||
| Polycystis mamertina | 1913 or earlier | |||
| Plagiostomum maculatum | 1913 or earlier | |||
| Monoophorum pleiocelis | 1882 or earlier | |||
| Monocelis lineata | 1913 or earlier | |||
| Monocelis unipunctata (1) | 1913 or earlier | |||
| Heterochaerus langerhansi | 1952 | marine caves. |