Complex sentence: Thus the hypothesis emerged that the "Ovatoscutum" was a pelagic Hydrozoa Chondrophora, later becaming popular and widely quoted, despite the absence of further research.
Split into simpler sentences: Thus the hypothesis emerged that the "Ovatoscutum" was a pelagic Hydrozoa Chondrophora. This hypothesis later became popular and was widely quoted, despite the absence of further research.