Whorls animal shells. Medical search. Frequent questions

The pillar around which the whorls form their spiral circuit. (cadivingnews.com)
It is white with black spots as in P. solidula , but the shell is more slender, and the black spots are usually separated into three wide bands on the body whorl by three white spiral lines. (seaslugforum.net)
The shell surface is mostly smooth, but may have a pattern consisting of faint spiral lines. (biodiversity.no)
A top shell with a pearly interior, no nodes on columella, umbilicus closed, spiral ridges are beaded and brown on a cream or yellow background. (wallawalla.edu)
Most anterior spiral ridge on each whorl is violet or purple. (wallawalla.edu)
C. variegatum also has beaded spiral ridges but they are all tan or brown and the animal is cream (not orange) with brown spots. (wallawalla.edu)
C. ligatum has unbeaded spiral ridges and the animal is orange. (wallawalla.edu)
In typical gastropods the shell is an expanding spiral supported by a central rod called a columella. (earthlife.net)
Ammonites' growing shells typically formed into a flat spiral, known as a planispiral, although a variety of shapes did evolve over time. (nhm.ac.uk)
Shells could be a loose spiral or tightly curled with whorls touching. (nhm.ac.uk)
Some species would begin growing their shell in a tight spiral but straighten it out through later growth phases. (nhm.ac.uk)
Orthostrophic growth is the standard gastropod growth pattern with the shell growing in a downwards spiral. (fieldofscience.com)
The spiral shape of the helicoprion's whorls led to its nickname, "buzz saw shark. (nocsprovisions.com)

They have a particularly distinctive shell as it is a different texture to most other snails, their shell having a lot of ridges and scratches on its surface. (a-z-animals.com)
Filling the top spots on the list are sea snails, and next up is the giant whelk which is a sea snail that can grow to a shell length of around 26cm (10 inches). (a-z-animals.com)
Another way of expressing this is to say that when viewed from the top of the spire, and then tracing the helix from the edge into the center, the lightning whelk shell spirals clockwise, not counter-clockwise as do almost all other snails in the world. (ufl.edu)
Snails have three ways of sealing shut their shell. (earthlife.net)
Orcula Held 1837 , the type genus of the family Orculidae is a group of small (5-10 mm), pulmonate land snails with ovate-cylindrical shells and 3-4 lamellae within the aperture and the body whorl. (pensoft.net)
Among living gastropods, heterostrophic coiling is characteristic of the Heterobranchia, the clade that includes opisthobranchs (sea slugs and related animals) and pulmonates (lung-breathing snails). (fieldofscience.com)

Ancient people deliberately collected perforated shells in order to string them together as beads In ancient times rare cowrie shells were a form of of currency used for trade in Africa and Asia. (factsanddetails.com)

When young, the shell is a shiny chestnut with a splash of black on the umbilicus and chartreuse on the columella. (cadivingnews.com)
For most gastropods, coiling the shell around a central pillar (called a columella) as opposed to simply growing a larger cone, has two benefits. (earthlife.net)

She has attached a strand of fiber to her spindle (gԑndԑ in Nafaanra), and she prepares to set it and the spindle whorl (gԑndԑ kaan in Nafaanra) which weights it in motion with her right hand. (uvic.ca)

The whorls are only slightly inflated, and the sutures between whorls are not deeply indented. (wallawalla.edu)

Euomphalus is characterized by a closely coiled shell with a depressed to slightly elevated spire and a channel-bearing angulation (a selenizone) on the upper surface of the whorls. (paleophilatelie.eu)

the oldest part of the shell (protoconch) is brownish transparent and sticks out (mamilate) but not beyond the first whorl. (artsdatabanken.no)
The protoconch forms the axis (peak) of the adult shell. (earthlife.net)

Zoë Hughes , Curator of Fossil Invertebrates at the Museum, explains, 'Ammonites are extinct shelled cephalopods. (nhm.ac.uk)
The now extinct animal lived in the Atlantic Ocean as well as other global seaways including North America, South America, Africa, Western Asia, and Antarctica.Fossils from these areas serve as our current proof of their existence. (surfsupmagazine.com)

Today most Cone Shells are dextral coilers, but the fossil evidence suggests that in distant past this family were more often dextrally coiled. (earthlife.net)
Cone shells are predominantly nocturnal, burrowing in the sand and coral during the daytime. (medscape.com)

The little gray shell (two inches tall max) is shaped like a pyramid, with layered vertical ridges on the sides. (cadivingnews.com)
As well as these ridges, their shells can be a variety of brown, yellow, and orange colors in vertical streaks. (a-z-animals.com)
The shells of many marine species are often adorned with spines and ridges for protection against predators. (earthlife.net)

A 17,000-year-old conch shell found in the Pyrenees in southern France in 1931 was used as a horn by ancient hunter-gatherers. (factsanddetails.com)
Ancient flutes were made of animal horns and tusks, bones, conch shells, bamboo, cane and tree limbs and trunks. (blackwoodconservation.org)

This was much more rewarding, allowing me to record not only the shell's appearance but the animal that lived in it and behaviors such as mating and laying eggs. (cadivingnews.com)
They typically have a proteinaceous or horny covering, or operculum, that plugs the shell's aperture when the animal is withdrawn. (reefkeeping.com)
Because the shell's "correct" orientation is therefore rotated 180° from that of an orthostrophic shell, if you hold a hyperstrophic shell with the aperture downwards a dextral shell is going to appear sinistral and vice versa. (fieldofscience.com)
Wherever it landed, the shell's elegant cream whorl with rust-brown stripes would have caught the woman's eye as she gleaned for shellfish. (biographic.com)

At the bottom of the shell an umbilicus is present. (artsdatabanken.no)
Umbilicus ca ¼-⅓ of shell width. (mollus.ca)

Also called the green snail, this species is easily identifiable by its green shell and can grow to a shell size of 10-12cm (up to 5 inches) in length. (a-z-animals.com)
Achatina Immaculata is also often called the pink-lipped agate snail due to the stunning pink edge (lip) around the shell of most adults. (a-z-animals.com)
This is a small land snail with a dark brown cylindrical (beehive-shaped) shell that is 2.3 mm in height and 1.2 mm in width with 4.5 to 5.5 whorls. (msu.edu)
Litter sampling consists of collecting soil and leaf litter samples in the field and drying, sifting and looking for snail shells in the litter samples in the laboratory. (msu.edu)
As the snail grows, so it needs to enlarge its shell. (earthlife.net)
The Anatomy of a Snail Shell. (earthlife.net)
Most snail shells are dextral, especially among marine species. (earthlife.net)
To capture a much faster prey in a highly dynamic marine environment, this relatively slow-moving snail has evolved into one of the fastest known predators in the animal kingdom, with the average attack lasting only milliseconds. (medscape.com)

Fast forward to 2013, scientists used CT scans to examine helicoprion whorl specimens. (nocsprovisions.com)

The oldest shell necklace is over 100,000 years old and was made from "Tritia gibbosula" shells. (factsanddetails.com)
Between 2005 and 2014, trade data collected by the U.S. Fish and Wildlife Service indicated that more than 100,000 whole nautilus shells and 800,000 parts were imported into the U.S. alone. (biographic.com)

This is quite rare but when it happens it is called dextral, or sinistral (depending on the coiling of the shell) hyperstrophy. (earthlife.net)

Additionally, the shell is typically quite long relative to its width, and mature animals often have six or more visible whorls. (reefkeeping.com)
In a few species the shell may be smoothly rounded, but typically the shell has some ridging that is parallel to its long axis or spiraling around it, or both. (reefkeeping.com)
This periostracum is typically what gives the shell its colourful pattern. (earthlife.net)
Except for the trio at the ticket booth, most people and animals are facing counterclockwise, the direction in which carousels typically rotate in North America. (cdc.gov)

We think it's more likely that ammonites would have had eight arms rather than lots of tentacles like a nautilus, though the shell is more similar to that of a nautilus. (nhm.ac.uk)
The experience inspired Ward to pursue a new line of inquiry, analyzing the composition of nautilus shells to track climbing temperatures in the deep sea, and looking to nautilus behavior to predict how these changes might affect his beloved study subjects. (biographic.com)

Detailed textures and whirling shapes enliven fur, scales, shells, and feathers, rich brocades that contrast with the smooth-skinned elephant and white and black zebra. (cdc.gov)

In the world of shell collecting, rarity is what determines value and, thankfully, most of the gastropods found in California waters aren't rare. (cadivingnews.com)
The gastropod shell is a distinctive and charismatic characteristic of most gastropods . (earthlife.net)
The majority of gastropods possess a shell of some sort and the design of these shells is highly variable. (earthlife.net)
The majority of gastropods have coiled shells, however in limpets and abalone the shell is reduced to a cap shape. (earthlife.net)
Some species of gastropods may change the coiling direction of their shell during their larval development (their ontogeny). (earthlife.net)
I guess Palaeozoic gastropods just don't have the same following as other animals. (fieldofscience.com)
In the case of fossil gastropods, where you can't look at the organs, distinguishing hyperstrophic shells becomes a lot more difficult and I have to confess that I really don't see how they do it (apparently the shape and orientation of the aperture may offer some indications). (fieldofscience.com)

In abalone this is partly a visual effect caused by the last whorl being 90% of the shell. (earthlife.net)
Today, shells are still widely used in the jewelry trade, particularly mother of pearl and abalone shells because of the luminescent finish. (factsanddetails.com)

The ratio of the turn of each pod and the ratio between the number of pods in successive whorls is the golden ratio, i.e., 1.618. (sciencestruck.com)

The surface is cleaned and repaired by the mantle, which secretes the shell and can completely cover it. (cadivingnews.com)

These bizarre life forms that seem simple and complex at the same time: both fragile - what lies beneath shells and suckers and spines - and intensely tough, able to withstand the greatest storms that would fell our puny bodies into submission. (caughtbytheriver.net)

While ammonite shells are abundant in the fossil record, it was only recently that scientists have found a very rare fossil of the soft parts of an ammonite . (nhm.ac.uk)
This stunning book is perfect for all readers because its clear explanations and beautiful photographs illuminate the significance of these amazing pieces, including 500 million-year-old Burgess Shale fossils that provide a window into early animal life in the sea, insects encapsulated by amber, the first fossil bird Archaeopteryx, and the remains of our own ancestors. (smithsonianmag.com)
Recent fossil shell mining for a new rail line in the Orlando area of Orange County, Florida has uncovered two species of the ellobioid genus Carychium O. F. Müller, 1773 in a bed of freshwater marl from the Lower Pleistocene Nashua Formation. (bvsalud.org)
nov. are identified from fossil shells dating from the Early Pleistocene. (bvsalud.org)

The operculum is always located very close to the aperture of the shell (Jokinen 1992). (montanaoutdoor.com)
The foot muscle, or columellar, also contracts to pull the foot in and close the aperture of the shell. (medscape.com)

I f you have ever collected shells on a beach in Southwest Florida, you almost surely have a lightning whelk in your possession. (ufl.edu)
One of the biggest lightning-whelk shells in the world can be seen on Sanibel Island at the Bailey-Matthews National Shell Museum. (ufl.edu)
There are many fascinating shells, so what's so special about a lightning whelk? (ufl.edu)
Tens of thousands of lightning whelk shells are found along with other debris in southwest Florida middens, their fleshy parts having been eaten by people, in many cases several hundred years ago. (ufl.edu)
Sometimes the Calusa used whelk shells for making tools. (ufl.edu)
But in places far from coasts, where lightning whelks do not live naturally, the whelk shells had special ritual significance. (ufl.edu)
Beads, drinking vessels, pendants, gorgets (decorative items worn at the neck), and other items were made from lightning whelk shells, which came from the Gulf of Mexico, some 500 miles away. (ufl.edu)
Lightning whelk shell artifacts from Southwest Florida. (ufl.edu)

Ammonites' shells make the animals look most like nautiluses, but they are actually thought to be more closely related to coleoids. (nhm.ac.uk)

Base of body whorl is nearly flat. (wallawalla.edu)
The coiling of the shell, and the coiling of the body (resulting from the 'torsion') are usually aligned. (earthlife.net)
However it does occur that the spiraling of the shell and the coiling of the body go in opposite directions. (earthlife.net)
But a question remained: where exactly was the helicoprion's whorl located on its body? (nocsprovisions.com)

A substance (chemical) that gets into a system (person, animal, or the environment) in amounts higher than that found in Background Level , or what would be expected. (cdc.gov)
If you see or suspect a new infestation of an invasive plant or animal, save the specimen if possible and include details on the location where you found it. (montanaoutdoor.com)
Shells with the animals still living in them can be found in the sea. (factsanddetails.com)
Sea shells can be found washed up on beaches. (factsanddetails.com)
The artefacts found include objects made of stone, bone and shell. (iasbio.com)
It was initially hard to say because, before the 1950s, whorls were the only remains found. (nocsprovisions.com)

Used in public health, things that humans would eat - including animals, fish and plants. (cdc.gov)
Sometimes refers to the plants and animals that are eaten by humans. (cdc.gov)
Humans have used sea shells for tens of thousands of years. (factsanddetails.com)
Swanson's The Carousel , this month's cover image, is a vibrant serigraph depicting the popular amusement ride-sometimes also called a merry-go-round-and illustrating a certain association and interaction between humans and animals. (cdc.gov)
Zoonoses, an unavoidable consequence of the interactions among humans and animals, are caused by harmful germs such as viruses, bacteria, parasites, and fungi. (cdc.gov)
Like Swanson's cycling carousel, emerging and reemerging zoonotic diseases―which are transmitted from animals to humans―and the pathogens that cause them, also occur in cycles as they propagate among different ecosystems. (cdc.gov)

People often collect these shells because of their great beauty of form and colour. (earthlife.net)
Low tides are the probably the best time to collect shells as the shoreline is exposed and more of the ocean floor is revealed. (factsanddetails.com)

A gastropod has just a single shell throughout its life. (earthlife.net)
A selection of gastropod shells, showing the diversity of form. (earthlife.net)
Gastropod shells are comprised of a mixture of calcium carbonate and an organic protein matrix called conchin or conchiolin. (earthlife.net)
The gastropod shell is constructed in three layers. (earthlife.net)
The gastropod shell, much like the bivalve shell, is secreted by the mantle. (earthlife.net)

Over the eons sea-shell-bearing mollusks have developed a variety into a variety of shapes. (factsanddetails.com)

Rudman, W.B., 2009 (Jun 3) Colour variation in the shell of Pupa strigosa . (seaslugforum.net)

The sinistrally coiled, flat shells are yellow-brown, discoidal, deeply and symmetrically biconcave, and consist of 5 or 6 slowly increasing whorls. (cdc.gov)

The tips of the tentacles point upwards in live animals. (artsdatabanken.no)
The animal itself has pointed, long tentacles and a simple foot with the right cervical lobe acting as a channel for water (Jokinen 1992). (montanaoutdoor.com)

This shell has a round operculum that looks like a flat, coiled rope. (cadivingnews.com)
The mantle of this shell also has fleshy filaments that serve as sense organs and an operculum that looks like a flat, coiled rope. (cadivingnews.com)

However, in terrestrial slugs it is greatly reduced or absent and in sea slugs it is lost before the animal reaches maturity. (earthlife.net)

They are, in fact, in the adult stage, almost land animals…' says Street, 'gradually being modified so that they too, in time, may well be able to leave the shore altogether and take up a purely terrestrial existence. (caughtbytheriver.net)
In the early years of my diving career I collected shells (a long time ago). (cadivingnews.com)
But this time, (due to very lucky circumstances), it contained a bit of cranial cartilage, proving that the whorl was indeed attached to the helicoprion's mouth. (nocsprovisions.com)
At the same time, human desire for the animals' beautiful mother-of-pearl shell has led to overfishing in some parts of their tropical Pacific home. (biographic.com)

Their shells are often fawn or an orange-brown color and they have a lot of distinctive whorls and bands on the surface. (a-z-animals.com)

the animals 'lick' the surface of the substrate with a structure which has been called a 'rasping tongue,' and which biologists call a 'radula. (reefkeeping.com)
The surface is smooth and the length of the shell varies between 2.5-3.9 mm. (artsdatabanken.no)
The lower surface of the whorls is rounded to angular. (paleophilatelie.eu)
Its shell lost the neutral buoyancy that allowed it to cruise effortlessly at whatever depth it chose, and it floated to the surface. (biographic.com)
The aperture is circular or slightly ovate and angled toward the left side of the shell (i.e., toward the upper surface on the bottom right shell). (cdc.gov)
Fine, parallel, rib-like transverse lines can be seen on the outer surface of the whorls. (cdc.gov)

Originally published in 1961, Philip Street's Shell Life on the Seashore is an amateur beachcombing classic. (caughtbytheriver.net)

There are between 70,000 and 120,000 shell-dwelling mollusks living on The Earth today. (factsanddetails.com)
Sea shells are a hard means of protection that soft-bodied mollusks build around themselves. (factsanddetails.com)

The whorl spins inside a small white vessel (possibly an animal skull or turtle shell) resting on a basket lid. (uvic.ca)

You can find them washed up on beaches or still in the water after the animal that lived inside them died. (factsanddetails.com)
Beachcombers find shells on beaches, tide pools and in the sea itself. (factsanddetails.com)

So, it pays to closely examine the animals that you intend to purchase or receive from dealers. (reefkeeping.com)

This was no shell formation but rather a series of spiraling teeth, all connected to the same base within a jaw. (nocsprovisions.com)
Like helicoprion, its relatives were armed with extended jawlines full of dagger-like teeth, called whorls. (nocsprovisions.com)
Helicoprion whorls held about 180 teeth. (nocsprovisions.com)

In terrestrial species the shell is quite thick in species from dryer, or desert habits and much thinner in species from humid tropical habitats. (earthlife.net)

Heterostrophic shells like Alaskiella start off life growing upwards like a hyperstrophic shell but then change the direction of growth to downwards. (fieldofscience.com)

The shells of older animals are covered with growth that includes barnacles and calcareous algae. (cadivingnews.com)
The orange-brown colouration on some shells is a thin organic, non-calcareous layer called the periostracum . (seaslugforum.net)

The thin shell is external and transparent, usually with a globe-like shape. (artsdatabanken.no)
Based on anatomical features (morphology of the penial caecum) shell characters (sculpture and shape) and unpublished molecular data the genus Orcula is subdivided into three subgenera. (pensoft.net)
An analysis of morphological range in one species (Diozoptyxis cochleaeformis) demonstrates wide continuous variation in overall shell shape and whorl concavity. (open.ac.uk)

The top of the shell (apex) is obscured by the whorls of the shell (involute). (biodiversity.no)

They are easily distinguishable by their striped shell and can grow to an adult size of 15cm (6 inches) in length. (a-z-animals.com)

And yet its plants and animals seem utterly other. (caughtbytheriver.net)

The closer the tooth was to the whorl tip, the smaller its size. (nocsprovisions.com)

This reference is excellent for Eastern Pacific and Gulf of California animals, and is good for some other tropical Pacific animals. (reefkeeping.com)

Each cone consists of pairs of alternating whorls, each oriented in the opposite direction to the other whorl. (sciencestruck.com)

The "trap door" that covers the aperture when the animal is inside the shell. (cadivingnews.com)

The author gives a description of the life animal. (deadasthedodo.com)
Inexorable law reigns in plant and animal life, in chemistry and physics. (amazingfacts.org)

Ammonites were born with tiny shells and, as they grew, they built new chambers onto it. (nhm.ac.uk)
And as it grew, it added new chambers to its spiraling shell. (biographic.com)

Anatomy3

Organisms1

Diseases1

Chemicals and Drugs4

Analytical, Diagnostic and Therapeutic Techniques and Equipment2

Anthropology, Education, Sociology and Social Phenomena2

Technology, Industry, Agriculture1

Information Science2

Health Care3

Spiral13

Snails6

Cowrie shells1

Columella2

Spindle whorl1

Sutures1

Spire1

Protoconch2

Extinct2

Cone Shells2

Ridges3

Conch2

Shell's4

Umbilicus2

Snail8

Specimens1

100,0002

Dextral1

Typically4

Nautilus2

Feathers1

Gastropods7

Abalone2

Pods1

Repaired by the mantle1

Spines1

Fossil4

Aperture of the shell2

Whelk8

Nautiluses1

Body4

Found6

Humans6

Collect2

Gastropod5

Variety of shapes1

Colour1

Deeply1

Tentacles2

Operculum2

Slugs1

Time4

Distinctive1

Surface6

19611

Mollusks2

Skull1

Beaches2

Examine1

Teeth3

Species the shell1

Upwards1

Calcareous2

Shape3

Apex1

Adult1

Plants and ani1

Tooth1

Gulf1

Consists1

Trap1

Life2

Grew2