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old harbor, Helgoland, Germany
latitude: 54.200001
longitude: 7.883333
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
| Archaphanostoma agile | Apr, May 1963 | mud | ||
| Maehrenthalia intermedia | 1897 or earlier | |||
| Byrsophlebs graffi | 1913 or earlier | beach water. | ||
| Hyporcus venenosus | 1913 or earlier | |||
| Trigonostomum armatum | 1913 or earlier | 0-27 m | found in Fucus at depths up to 27 m. | |
| Trigonostomum intermedium | 1896 or earlier | |||
| Acrorhynchus heinckei | 1896 or earlier | Grösse eines kleinen Acrorhynchus caledonicus. Recht schlank, jedenfalls schlanker als Acr caledonicus, vorn zugespitzt, hinten ein wenig verschmälert, abgerundet; farblos, weiss. | ||
| Acrorhynchus caledonicus | 1913 or earlier | 1-3 m | in ebb tide pools, and litoral zone in large numbers. | |
| Phonorhynchus helgolandicus | 1913 or earlier | |||
| Gyratrix attemsi | 1896 or earlier | Graff 1896. | ||
| Plagiostomum dioicum | 1913 or earlier |