''Turbo bruneus'', common name the brown (Pacific) dwarf turban or the little burnt turbo, 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, 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 ...
Turbinidae
Turbinidae, the turban snails, are a family of small to large marine gastropod molluscs in the superfamily Trochoidea.Bouchet, P. (2014). Turbinidae Rafinesque, 1815. Accessed through: World Register of Marine Species at http://www.marinespec ...
.
These snails are called "turbo" because they can move quite quickly for a snail, using a muscular foot to glide along the ocean floor. They feed on algae and other small organisms that they scrape off rocks and other surfaces.
Turbo bruneus snails are important members of their
ecosystem
An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the syst ...
because they help to control the population of algae and other small
organisms
In biology, an organism () is any living system that functions as an individual entity. All organisms are composed of cells ( cell theory). Organisms are classified by taxonomy into groups such as multicellular animals, plants, and f ...
, which can become overgrown and harm other marine life if left unchecked.
Description
The length of the shell varies between 20 mm and 50 mm. The size of the Turbo bruneus shells are basically about 5-6 centimeters in diameter and have a rounded, conical shape with a pointed vertex. The color of the shell is
brown
Brown is a color. It can be considered a composite color, but it is mainly a darker shade of orange. In the CMYK color model used in printing or painting, brown is usually made by combining the colors orange and black. In the RGB color model use ...
, with a
glossy
Gloss is an optical property which indicates how well a surface reflects light in a specular (mirror-like) direction. It is one of the important parameters that are used to describe the visual appearance of an object. The factors that affect glo ...
, polished appearance.
These
snails
A snail is, in loose terms, a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name ''snail'' is also used for most of the members of the molluscan class Ga ...
are found in a wide range of
habitats
In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...
, including
coral reefs
A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups.
Co ...
, rocky shorelines and
seagrass
Seagrasses are the only flowering plants which grow in marine environments. There are about 60 species of fully marine seagrasses which belong to four families ( Posidoniaceae, Zosteraceae, Hydrocharitaceae and Cymodoceaceae), all in the ...
beds. They can be found at depths of up to 30 meters but are more commonly found in
shallow waters Shallow water may refer to:
* ''Shallow Water'' (album)
* Shallow Water, Kansas, unincorporated community, United States
* Waves and shallow water
When waves travel into areas of shallow water, they begin to be affected by the ocean bottom. T ...
around 5 -10 meters deep.
Turbo bruneus snails are firstly
herbivores
A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example foliage or marine algae, for the main component of its diet. As a result of their plant diet, herbivorous animals typically have mouthpar ...
, feeding on a variety of
seaweed
Seaweed, or macroalgae, refers to thousands of species of macroscopic, multicellular, marine algae. The term includes some types of ''Rhodophyta'' (red), ''Phaeophyta'' (brown) and ''Chlorophyta'' (green) macroalgae. Seaweed species such as ke ...
and other small organisms that they scrape off surfaces using a specialized feeding structure called a
radula
The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food ...
. They are also known to consume small
crustaceans
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean gr ...
and other
invertebrates
Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordate ...
when food is in short supply.
Turbo bruneus snails have an interesting reproduction process. They are
dioecious
Dioecy (; ; adj. dioecious , ) is a characteristic of a species, meaning that it has distinct individual organisms (unisexual) that produce male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproducti ...
, meaning that each individual snail is either male or female. During
mating
In biology, mating is the pairing of either opposite- sex or hermaphroditic organisms for the purposes of sexual reproduction. ''Fertilization'' is the fusion of two gametes. '' Copulation'' is the union of the sex organs of two sexually rep ...
season, male snails release their
sperm into the water, which is then carried by currents to nearby females. After
fertilization
Fertilisation or fertilization (see spelling differences), also known as generative fertilisation, syngamy and impregnation, is the fusion of gametes to give rise to a new individual organism or offspring and initiate its development. Pro ...
, the female snail lays hundreds of small eggs, which are enclosed in a
jelly-like substance and attached to rocks or other hard surfaces. The eggs hatch into free-swimming larvae, which eventually settle on the
ocean
The ocean (also the sea or the world ocean) is the body of salt water that covers approximately 70.8% of the surface of Earth and contains 97% of Earth's water. An ocean can also refer to any of the large bodies of water into which the wo ...
floor and grow into adult snails.
One of the interesting feature of Turbo bruneus snails is their
operculum. This is a small, round,
calcareous
Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines.
In zoology
''Calcareous'' is used as an a ...
plate that covers the opening of their shell when they retract their body inside. The operculum is important for protecting the snail from
predators
Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill th ...
and maintaining
moisture
Moisture is the presence of a liquid, especially water, often in trace amounts. Small amounts of water may be found, for example, in the air (humidity), in foods, and in some commercial products. Moisture also refers to the amount of water vapo ...
inside the shell.
Another unique feature of these snails is their ability to
survive
Survival, or the act of surviving, is the propensity of something to continue existing, particularly when this is done despite conditions that might kill or destroy it. The concept can be applied to humans and other living things (or, hypotheti ...
out of water for short periods of time. When the
tide
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another.
Tide tables can ...
goes out, Turbo bruneus snails can close their operculum and seal themselves inside their shell to prevent drying out. This
adaptation allows them to survive in
intertidal zones
The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species of ...
where they may be exposed to air for extended periods.
In addition to their
ecological
Ecology () is the study of the relationships between living organisms, including humans, and their biophysical environment, physical environment. Ecology considers organisms at the individual, population, community (ecology), community, ecosy ...
importance, Turbo bruneus snails are also of
economic
An economy is an area of the production, distribution and trade, as well as consumption of goods and services. In general, it is defined as a social domain that emphasize the practices, discourses, and material expressions associated with t ...
importance to some coastal communities, as their shells are often used in traditional
crafts
A craft or trade is a pastime or an occupation that requires particular skills and knowledge of skilled work. In a historical sense, particularly the Middle Ages and earlier, the term is usually applied to people occupied in small scale prod ...
and
jewelry
Jewellery (British English, UK) or jewelry (American English, U.S.) consists of decorative items worn for personal adornment, such as brooches, ring (jewellery), rings, necklaces, earrings, pendants, bracelets, and cufflinks. Jewellery may be at ...
making.
Distribution
This marine species occurs in the
Red Sea
The Red Sea ( ar, البحر الأحمر - بحر القلزم, translit=Modern: al-Baḥr al-ʾAḥmar, Medieval: Baḥr al-Qulzum; or ; Coptic: ⲫⲓⲟⲙ ⲛ̀ϩⲁϩ ''Phiom Enhah'' or ⲫⲓⲟⲙ ⲛ̀ϣⲁⲣⲓ ''Phiom ǹšari''; ...
, in the Central Indo-Pacific, in the Western Pacific Ocean, off
East India
East India is a region of India consisting of the Indian states of Bihar, Jharkhand, Odisha
and West Bengal and also the union territory of the Andaman and Nicobar Islands. The region roughly corresponds to the historical region of Magadha ...
, the
Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
and off
Western Australia
Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to ...
.
References
* Röding, P.F. 1798. ''Museum Boltenianum sive Catalogus cimeliorum e tribus regnis naturae quae olim collegerat'' Joa. Hamburg : Trappii 199 pp
* Rajagopal, A.S. & Mookherjee, H.P. 1978. ''Contributions to the molluscan fauna of India. Pt. I. Marine molluscs of the Coromandel Coast, Palk Strait and Gulf of Mannar - Gastropoda: Archaeogastropoda''. Records of the Zoological Survey of India 12: 1–48
* Wilson, B. 1993. ''Australian Marine Shells. Prosobranch Gastropods''. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp.
* Subba Rao, N.V. & Dey, A. 2000. ''Catalogue of marine molluscs of Andaman and Nicobar Islands''. Records of the Zoological Survey of India, Occasional Paper 187: x, 323 pp
* Alf A. & Kreipl K. (2003). ''A Conchological Iconography: The Family Turbinidae, Subfamily Turbininae, Genus Tur''bo. Conchbooks, Hackenheim Germany.
External links
*
bruneus
Gastropods described in 1791">Turbo (gastropod)">bruneus
Gastropods described in 1791
{{Turbinidae-stub