Protomonaxonida is an extinct order of
sea sponges. It is a
paraphyletic group gathering the most ancient species from the
Burgess Shale to modern sponges.
^Porifera (Demospongea, Hexactinellida, Heteractinida, Calcarea). Treatise on Invertebrate Paleontology Part E, Revised E(3), R. M. Finks, R. E. H. Reid, and J. K. Rigby. 2004, pages 1-872
^
abcdRigby, J. K.; Collins, D. (2004). "Sponges of the Middle Cambrian Burgess Shale and Stephen Formations, British Columbia". ROM contributions in science. 1.
ISBN0-88854-443-X.
ISSN1710-7768.
Protomonaxonida is an extinct order of
sea sponges. It is a
paraphyletic group gathering the most ancient species from the
Burgess Shale to modern sponges.
^Porifera (Demospongea, Hexactinellida, Heteractinida, Calcarea). Treatise on Invertebrate Paleontology Part E, Revised E(3), R. M. Finks, R. E. H. Reid, and J. K. Rigby. 2004, pages 1-872
^
abcdRigby, J. K.; Collins, D. (2004). "Sponges of the Middle Cambrian Burgess Shale and Stephen Formations, British Columbia". ROM contributions in science. 1.
ISBN0-88854-443-X.
ISSN1710-7768.