Julia (gastropod)
Encyclopedia
Julia is a minute sea snails genus, marine
gastropod mollusks or micromollusk
s in the superfamily Oxynooidea
.
Julia is the type genus
of the family Juliidae
.
As Tryon (1884) wrote in his description of the genus Julia: the shell is oblong, thick, and cordiform. The valves are closed, the margins entire and the valves are inequilateral. The lunule is deep circular, projecting into the interior of the right valve, the left valve is in the same place furnished with dentiform tubercles. The hinge line is simple and arched. The ligament
is external and narrow. There are two muscle scars which are unequal and subcentral.
These animals have two valves, and the soft parts can be completely withdrawn inside the shell. The two valves are usually thin and translucent.
The empty valves of the shells of these animals are in some cases green, in other cases brownish-green or yellow, and in yet others, colorless. The species Julia zebra
has shells that are finely striped with brown and blotched with white. http://seaslugsofhawaii.com/species/Julia-zebra-b.html
Marine (ocean)
Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...
gastropod mollusks or micromollusk
Micromollusk
A micromollusk is a descriptive term for a shelled mollusk which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine mollusks, although in addition, numerous species of land snails and freshwater mollusks also reach adult size at very small...
s in the superfamily Oxynooidea
Oxynooidea
Oxynooidea is a superfamily of small sea snails, bubble snails and bivalved gastropods, marine gastropod mollusks within the clade Sacoglossa.Oxynooidea is the only superfamily in the clade Oxynoacea.-Taxonomy:* clade Oxynoacea...
.
Julia is the type genus
Type genus
In biological classification, a type genus is a representative genus, as with regard to a biological family. The term and concept is used much more often and much more formally in zoology than it is in botany, and the definition is dependent on the nomenclatural Code that applies:* In zoological...
of the family Juliidae
Juliidae
Juliidae, common name the bivalved gastropods, is a family of minute sea snails, marine gastropod mollusks or micromollusks in the superfamily Oxynooidea, an opisthobranch group....
.
Description
Ligament
In anatomy, the term ligament is used to denote any of three types of structures. Most commonly, it refers to fibrous tissue that connects bones to other bones and is also known as articular ligament, articular larua, fibrous ligament, or true ligament.Ligament can also refer to:* Peritoneal...
is external and narrow. There are two muscle scars which are unequal and subcentral.
These animals have two valves, and the soft parts can be completely withdrawn inside the shell. The two valves are usually thin and translucent.
The empty valves of the shells of these animals are in some cases green, in other cases brownish-green or yellow, and in yet others, colorless. The species Julia zebra
Julia zebra
Julia zebra is a species of a sea snail with a shell comprising two separate hinged pieces or valves. It is a marine gastropod mollusk in the family Juliidae.-Distribution:The type locality for this species is Yamaguchi Prefecture, Japan....
has shells that are finely striped with brown and blotched with white. http://seaslugsofhawaii.com/species/Julia-zebra-b.html
Species
- (recent) Julia burniJulia burniJulia burni is a species of a sea snail with shell of two separate hinged pieces or valves, a marine gastropod mollusk in the family Juliidae.-Distribution:The type locality for this species is Port Blair in Andaman Islands, India....
Sarma, 1975 - (invalid recent species) Julia cornuta (De Folin, 1867)
- (invalid recent species) Julia equatorialis Pilsbry & Olsson, 1944
- (recent) Julia exquisitaJulia exquisitaJulia exquisita is a species of a sea snail with a shell comprising two separate hinged pieces or valves. It is a marine gastropod mollusk in the family Juliidae.-Distribution:The type locality for this species is Hawaiian Islands....
Gould, 1862 - this species was mentioned in report by the Challenger expeditionChallenger expeditionThe Challenger expedition of 1872–76 was a scientific exercise that made many discoveries to lay the foundation of oceanography. The expedition was named after the mother vessel, HMS Challenger.... - (recent) Julia japonicaJulia japonicaJulia japonica is a species of a sea snail with a shell comprising two separate hinged pieces or valves. It is a marine gastropod mollusk in the family Juliidae.-Distribution:The type locality for this species is Wakayama, Honshū, Japan.-Ecology:...
Kuroda & Habe, 1951 - (recent) Julia mishimaensisJulia mishimaensisJulia mishimaensis is a species of a sea snail with a shell comprising two separate hinged pieces or valves. It is a marine gastropod mollusk in the family Juliidae.-Distribution:The type locality for this species is Yamaguchi Prefecture, Japan....
Kawaguti & Yamasu, 1982 - (recent) Julia thecaphoraJulia thecaphoraJulia thecaphora is a species of a sea snail with a shell comprising two separate hinged pieces or valves. It is a marine gastropod mollusk in the family Juliidae.-Distribution:The type locality for this species is probably Mazatlán, Mexico....
(Carpenter, 1857) - a probable synonym is Julia zebraJulia zebraJulia zebra is a species of a sea snail with a shell comprising two separate hinged pieces or valves. It is a marine gastropod mollusk in the family Juliidae.-Distribution:The type locality for this species is Yamaguchi Prefecture, Japan....
Kawaguti, 1981 - (recent) Julia zebraJulia zebraJulia zebra is a species of a sea snail with a shell comprising two separate hinged pieces or valves. It is a marine gastropod mollusk in the family Juliidae.-Distribution:The type locality for this species is Yamaguchi Prefecture, Japan....
Kawaguti 1981