IN NATURE of December 8 there appears an article by my friend Dr. F. A. Bather entitled “Echinoderm Larvæ and their Bearing on Classification.” The article consists of a review of Dr. Mortensen's work ...

Scientists have discovered a new species that lived more than 500 million years ago -- a form of ancient echinoderm that was ancestral to modern-day groups such as sea cucumbers, sea urchins, sea ...

The impact on levels of carbon dioxide in the Earth's atmosphere by the decaying remains of a group of marine creatures that includes starfish and sea urchin has been significantly underestimated. The ...

Downey, Maureen E. 1971. "A New Species of the Genus Solaster (Echinodermata: Asteroidea) from Martinique." Proceedings of the Biological Society of Washington, 84, (4) 39–42.

Ciasico, M.N.A. and Ciasico, F.E.A. (2025) Macrobenthic Invertebrates in the Seagrass Bed of Matarinao Bay, Southeast Samar, ...

THOUGH loth to prolong this discussion, I wish, in fairness to Dr. Mortensen and myself, to say that I did not accuse Dr. Mortensen of regarding the echinoderm metamorphosis as a case of metagenesis.