| Authors(s) | Burdon-Jones, C. |
| Year | 1957 |
| Title | Hemichordata. Enteropneusta, Family Ptychoderidae. Tornaria larvae. Fiches d'Identification du Zooplancton, 70 ( |
| Authors(s) | Burdon-Jones, C. |
| Year | 1957 |
| Title | Hemichordata. Enteropneusta, Family Ptychoderidae. Tornaria larvae. Fiches d'Identification du Zooplancton, 70 ( |