| Adult Diagnosis | Larva Diagnosis |
| Phoronis muelleri Selys-Longchamps, 1903 | Actinotrocha branchiata Müller, 1846 |
| Synonyms:
Actinotrocha brownei Selys-Longchamps, 1907 Actinotrocha B Ikeda, 1901 Actinotrocha D Ikeda, 1901
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| References on Phoronis muelleri | References on Actinotrocha branchiata |
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