Membranipora is a genus of bryozoans in the family Membraniporidae. A typical example is the widely distributed species Membranipora membranacea that commonly encrusts seaweeds, particularly fronds of the kelps Laminaria digitata, L. hyperborea, and Saccorhiza polyschides.
Limacina is a genus of swimming predatory sea snails commonly known as sea butterflies in the family Limacinidae. This genus contains some of the world's most abundant gastropod species.
Stellwagen Bank National Marine Sanctuary is an 842-square-mile (638-square-nautical-mile) federally protected marine sanctuary located at the mouth of Massachusetts Bay, between Cape Cod and Cape Ann. It is known as an excellent whale watching site, and is home to many other species of marine life.
Verticordiidae is a family of benthic marine bivalves in the superorder Anomalodesmata. These clams range from 2 - 200 millimeters in length and are mainly found in coastal waters surrounding Australia and the Americas, though a few species within this family such as Haliris mediopacifica are found in the middle of the ocean. Verticordiidae is known for being a family of septibranchs, or predatory bivalves, rather than filter feeders. Clams dig vertical burrows in substrate and use papillae around the edges of their inhalant siphons to detect microscopic prey. Some clams in this family, specifically in the genus Trigonulina, have distinct extended circular formations on their shells.
Pinna is a genus of bivalve molluscs belonging to the family Pinnidae.
Anomia is a genus of saltwater clams, marine bivalve mollusks in the family Anomiidae. They are commonly known as jingle shells because when a handful of them are shaken they make a jingling sound, though some are also known as saddle oysters.
Aegires is a genus of sea slugs, dorid nudibranchs, marine gastropod mollusks in the family Aegiridae. Species within this genus feed exclusively on calcareous sponges.
Gymnobela bairdii, common name Baird's turrid, is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Ithycythara psila is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
Tegula hotessieriana is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.
Athleta is a genus of sea snails, marine gastropod mollusks in the family Volutidae.
Synaptocochlea is a genus of very small sea snails, marine gastropod mollusks in the family Trochidae, the top snails.
Monoplex pilearis, common name the hairy triton, is a species of medium-sized predatory sea snail, a marine gastropod mollusk in the family Cymatiidae.
Rissoina sagraiana is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoinidae.
Turbonilla elegantula is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Turbonilla ornata, common name the ornate turbonilla, is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Lissospira ornata is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.
Crisia is a genus of bryozoans in the family Crisiidae. Some species are known from the fossil record.
Trigonulina d'Orbigny, 1853 is a genus of small carnivorous bivalves in the family Verticordiidae. It was first named by Alcide d'Orbigny with the type taxon T. ornata in 1853, though T. novemcostata was named first originally as Hippagus novemcostatus in 1850 which is now unaccepted. Trigonulina shells are known to be extremely small, ranging from about 1-3.6 millimeters long. They live at depths of 18-850 meters below the ocean's surface and burrow under sand to feed on microscopic crustaceans using adapted inhalant siphons. T. ornata lives in the western Atlantic Ocean while T. novemcostata is native to the South China Sea.
Trigonulina novemcostata is a carnivorous bivalve in the family Verticordiidae. It is native to the South China Sea with 7–8 prominent ribs on its surface and ranges from about 0.7-5 millimeters in size in accordance with the unaccepted genus Hippagus it was originally described as. It is the only currently known species in the genus Trigonulina that lives outside of the western Atlantic Ocean, being found in the South China Sea and Pacific Ocean. This species has been observed between California and Peru as well as in Costa Rica. Malacologists currently debate if T. novemcostata is a separate species or a variant of T. ornata due to their similar appearances and habitat overlap.
