Ophiopholis is a genus of brittle stars (Ophiuroidea) found in oceans worldwide from tropics to temperate regions.
Ophiotrichidae are a family of brittle stars within the suborder Gnathophiurina.
Ophioderma is a genus of brittle stars in the family Ophiodermatidae.
The Oreasteridae are a family of sea stars in the class Asteroidea.
Anthenea is a genus of sea stars in the family Oreasteridae. Members of this genus are most commonly observed off the coasts of Australia and southeast Asia.
Nectriaster monacanthus is a species of sea star in the family Oreasteridae. It is the sole species in the genus Nectriaster. It was first described by Hubert Lyman Clark in 1916 as Mediaster monacanthus.
Chondrocidaris brevispina, the raspberry sea urchin, is a species of sea urchins of the family Cidaridae. Their armour is covered with short, conical spines.
Cidaris rugosa is a species of sea urchins of the Family Cidaridae. Their armour is covered with spines. Cidaris rugosa was first described in 1907 by Hubert Lyman Clark as Dorocidaris rugosa.
Ophiopsila is a genus of brittle star belonging to the family Ophiocomidae. Many species are bioluminescent.
Astroboa is a genus of basket stars in the class Ophiuroidea.
Ophiactis is a genus of brittle stars (Ophiuroidea).
Ophiomastix is a genus of echinoderms belonging to the family Ophiocomidae.
Ophiura is a genus of echinoderms belonging to the family Ophiuridae.
Echinocyamus is a genus of echinoderms belonging to the family Fibulariidae.
Ophiarachnella is a genus of echinoderms belonging to the family Ophiodermatidae.
Ophionereis is a genus of echinoderms belonging to the family Ophionereididae.
Ophiomusa is a genus of echinoderms belonging to the family Ophiolepididae that includes: sea urchins, sand dollars and sea cucumbers. Ophiurida are similar to starfish; they both have a central disc and five arms sprouting from the disc. One of the main distinguishing factors of an Ophiuroid is its arms; the arms of an Ophiurida are longer, thinner, and distinctly separated in comparison to those of a sea star.
Edward Bennett Mathews, Ph.D. (1869-1944), was an American geologist. He obtained a bachelor's degree from Colby College in 1891, and began serving with the United States Geological Survey in the same year, working under Charles R. Van Hise. He was a professor of Mineralogy and Petrography at Johns Hopkins University. He was appointed the Assistant State Geologist of Maryland in 1896 by the State Geologist, William Bullock Clark, and served in that role until 1917, when he became the State Geologist upon Clark's death. He retired from Johns Hopkins in 1939, departed the position of State Geologist in 1943, and died the following year.
Macrophiothrix is a genus of brittle stars.
