Robuta

https://marinespecies.org/porifera/porifera.php?p=taxdetails&id=184547 World Porifera Database - Species - Hyalonema (Euhyalonema) Ijima, 1927 world porifera database species hyalonema https://marinespecies.org/Deepsea/aphia.php?p=taxdetails&id=171451 World Register of Deep-Sea species - Hyalonema (Cyliconema) apertum Schulze, 1886 deep sea world register species hyalonema https://species.wikimedia.org/wiki/Hyalonema_sieboldii Hyalonema sieboldii - Wikispecies hyalonema wikispecies https://www.marinespecies.org/deepsea/aphia.php?p=taxdetails&id=171525 World Register of Deep-Sea species - Hyalonema (Paradisconema) investigatoris Schulze, 1900 deep sea world register species hyalonema