''Hexaplex regius'', common name: the regal murex, is a

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

of sea snail, a marine gastropod

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is es ...

in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Muricidae Muricidae is a large and varied taxonomic family of small to large predatory sea snails, marine gastropod mollusks, commonly known as murex snails or rock snails. With about 1,600 living species, the Muricidae represent almost 10% of the Ne ...

, the murex snails or rock snails.

Description

The size of the adult shell varies between 60 mm and 180 mm. External colors are white with occasional brownish spiral stripes, which on some specimens may be absent. The colors of the aperture, or opening of the shell is pink at the edges and the glossy shield over the

columella Lucius Junius Moderatus Columella (; Arabic: , 4 – ) was a prominent writer on agriculture in the Roman Empire. His ' in twelve volumes has been completely preserved and forms an important source on Roman agriculture, together with the ...

. At the top and some of the left side of the shield, the pink merges into a dark chocolate-brown staining, ending at the posterior canal. Further inside, the shell fades into a porcelain-white with faint, pink tinting. The siphonal canal is a mixture of pink and light brown. The sculpture overall is both described as prickly and frond-like; the spines are numerous and scaly. In between spine rows, the shell is

lirate Lirae (singular lira) are fine lines or ridges (much finer than ribs) that are a sculptural feature of the outside of the shells of various animals. The term is commonly applied to the shells of molluscs such as gastropods, bivalve Biv ...

Distribution

This species occurs in the Pacific Ocean between

Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...

and

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

(but not along the Galapagos Islands).

References

External links

* Muricidae Gastropods described in 1821 {{Muricidae-stub