Porifera

Hyalonematidae Gray, 1857

Selection of related publications
Rhebergen, F., Hacht, U. von 2000. Ordovician erratic sponges from Gotland, Sweden. GFF 122, 4, 339-349. DOI:10.1080/11035890001224339
Assatkin, B. P. 1949. Type Porifera. Sponges. Atlas of the leading forms of the fossil faunas of the USSR, 2. Silurian System, pp. 63–73.
Öpik, A. 1930. Beiträge zur Kenntnis der Kukruse-(C2-C3-)Stufe in Eesti. IV. Tartu Ülikooli Geoloogia Instituudi Toimetused 24, 1-34.