False Triton Shells of the Pisaniidae Family

Five False Triton Shells of the Pisaniidae Family can be found in this website:

Phylogeny: The False Tritons are members of the Pisaniidae Family that are gastropod mollusks of the order Neogastropoda. Neogastropods are characterized by having a long siphon canal, a well-developed siphon notch, and a specialized radula. Many species in this order have a narrow aperture. Neogastropods are primarily marine snails and most of the well-known shell families are in this order. The Pisaniidae Family is in the superfamily Buccinoidea, which is one of seven superfamilies in this order. Superfamily Buccinoidea consists of twenty families. The Pisaniidae Family does not contain any subfamilies, but it consists of twenty genera- Ameranna with five species Aplus with six species,  Bailya with fourteen species,  Cancellopollia with three species, Cantharus with fourteen species,  Dianthiphos with two species, Ecmanis with one species, Engina with sixty-three species, Enginella with two species, Gemophos with eleven species, Hesperisternia with eleven species,  Micrologus with one species,  Monostiolum with ten species,  Pisania with eighteen species,  Pollia with twenty-one species, Pusio with two species, Sinetectula with sixteen species, Solenosteira with eight species, Steye with four species, and  Triumphis with one species. Shells in this family are collectively called Pisaniids.

Description:  False Triton Shells are a large group of shells that are very diverse in shape. They are small to medium-sized. Most consist of few whorls, a large body whorl, and a pointed apex. These shells are strongly spiraled, with each whorl readily identifiable. The sutures (where individual whorls join together) tend to be deep. The exterior surface of the shells may be sculpted with axial, or spiral ridges, but most species do not display knobs, spines, or varices. The aperture is long and either narrow or ovate. They may lack a posterior siphonal notch, or have a well-marked one. The anterior siphon canal is short and open. Many species have a flared outer lip, which they use to pry open bivalves. The columella is smooth and curved. The outer lip may be thin or thicked, with dentition or a serrated margin. The tropical species are generally more colorful than the temperate and polar species. The operculum is claw-shaped. The larger species in this family reach around 10 cm (3.9 inches) in length. False Triton Shells closely resemble many of the Whelk Shells of the Buccinidae Family. Many of the Whelks have recently been reclassified into this family.

Habitat and Distribution: False Tritons are generally found on sand or mud substrates. They are sometimes associated with seagrass beds. They may live as shallow as one meter (3 feet) or in excess of 200 m (656 feet). Some sources extend this range to 550 m (1,804 feet). They are found in tropical to polar seas, worldwide. Around twenty species from this family are found in Mexican waters.

Natural History: False Tritons are opportunistic carnivores that locate their prey by chemoreceptors. They prey on ascidians (worms), crustaceans, mollusks, and carrion.   They are gonochoric and reproduce sexually, with internal fertilization.