@article{WoRMS:SourceID:36136, author = {Haeckel, E.}, journal = {Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena}, note = {pls 21-40.Descriptors: Hydractinia exigua, Cytaeis exigua, Sarsia conica, Codonium conicum, Coryne conica
publication year given as 1880 in Mayer (1910) and Kramp (1961)}, title = {Das System der Acraspeden. 2te Hälfte des Systems der Medusen. Acht Nachträge zur Vervollständigung des Systems. }, url = {https://www.biodiversitylibrary.org/page/32605982}, year = {1880} }