Jean-Baptiste Pierre Antoine de Monet, chevalier de Lamarck, often known simply as Lamarck, was a French naturalist, biologist, academic, and soldier. He was an early proponent of the idea that biological evolution occurred and proceeded in accordance with natural laws.
Lytechinus variegatus, commonly called the green sea urchin or the variegated sea urchin, is a species of sea urchin that can be found in the warm waters of the western Atlantic Ocean and Caribbean Sea.
Eucidaris tribuloides, the slate pencil urchin, is a species of cidaroid sea urchins that inhabits littoral regions of the Atlantic Ocean. As a member of the basal echinoid order Cidaroida, its morphological, developmental and molecular genetic characteristics make it a phylogenetically interesting species.
Echinarachnius is a genus of sand dollars, belonging to the family Echinarachniidae.
Varicospira is a genus of sea snails, marine gastropod mollusks in the family Rostellariidae within the Stromboidea, the true conchs and their allies.
Toxopneustes pileolus, commonly known as the flower urchin, is a widespread and commonly encountered species of sea urchin from the Indo-West Pacific. It is considered highly dangerous, as it is capable of delivering extremely painful and medically significant stings when touched. It inhabits coral reefs, seagrass beds, and rocky or sandy environments at depths of up to 90 m (295 ft). It feeds on algae, bryozoans, and organic detritus.
Amblypneustes formosus is a species of sea urchin of the family Temnopleuridae. Their armour is covered with spines. It is in the genus Amblypneustes and lives in the sea. Amblypneustes formosus was first scientifically described in 1846 by Valenciennes.
Amblypneustes leucoglobus is a species of sea urchin of the family Temnopleuridae. Their armour is covered with spines. It is in the genus Amblypneustes and lives in the sea. Amblypneustes leucoglobus was first scientifically described in 1914 by Ludwig Döderlein.
Amblypneustes ovum is a species of sea urchin of the family Temnopleuridae. Their armour is covered with spines. It is in the genus Amblypneustes and lives in the sea. Amblypneustes ovum was first scientifically described in 1816 by Jean-Baptiste de Lamarck.
Clypeaster, common name "cake urchins" or "sea biscuits", is a genus of echinoderms belonging to the family Clypeasteridae.
Toxopneustes is a genus of sea urchins from the tropical Indo-Pacific. It contains four species. They are known to possess medically significant venom to humans on their pedicellariae. They are sometimes collectively known as flower urchins, after the most widespread and most commonly encountered species in the genus, the flower urchin.
Eucidaris is a genus of cidaroid sea urchins known as slate pencil urchins. They are characterised by a moderately thick test, a usually monocyclic apical disc, perforate and non-crenulate tubercles and nearly straight ambulacra with horizontal pore pairs. The primary spines are few and widely spaced, stout with blunt flat tips and beaded ornamentation and the secondary spines are short and apressed. They originated in the Miocene and extant members of the genus are found in the tropical Indo-Pacific Ocean, East Pacific, Atlantic Ocean and Caribbean Sea.
Astropyga pulvinata is a species of sea urchins of the family Diadematidae. Their armour is covered with spines. Astropyga pulvinata was first scientifically described in 1816 by Jean-Baptiste de Lamarck.
Cassidulus caribaearum is a species of sea urchins of the family Cassidulidae. Their armour is covered with spines. Cassidulus caribaearum was first scientifically described in 1801 by Jean-Baptiste de Lamarck.
Scutellidae is a family of sand dollars in the superfamily Scutellidea. All genera except Scaphechinus are extinct.
Toxopneustes maculatus is a rare species of sea urchin found in the Indo-West Pacific.
Amblypneustes is a genus of sea urchins, belonging to the family Temnopleuridae.
Priapulus caudatus known as the cactus worm, is a marine invertebrate belonging to the phylum Priapulida. It is a cylindrical, unsegmented worm which burrows in soft sediment on the seabed. It has a circumpolar distribution.
Parechinus angulosus, the Cape urchin, is a sea urchin in the family Parechinidae endemic to southern Africa. It is the only species in the genus Parechinus.
Fibularia is a genus of echinoderms belonging to the family Fibulariidae. The genus has almost a cosmopolitan distribution.
