Daphnella pessulata | |
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Original image of a shell of Daphnella pessulata | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Clade: | Caenogastropoda |
Clade: | Hypsogastropoda |
Clade: | Neogastropoda |
Superfamily: | Conoidea |
Family: | Raphitomidae |
Genus: | Daphnella |
Species: | D. pessulata |
Binomial name | |
Daphnella pessulata (Reeve, 1843) | |
Synonyms [1] | |
Pleurotoma pessulataReeve, 1843 |
Daphnella pessulata, common name the barred pleurotoma, is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. [1]
In biology, a species ( ) is the basic unit of 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 the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. While these definitions may seem adequate, when looked at more closely they represent problematic species concepts. For example, the boundaries between closely related species become unclear with hybridisation, in a species complex of hundreds of similar microspecies, and in a ring species. Also, among organisms that reproduce only asexually, the concept of a reproductive species breaks down, and each clone is potentially a microspecies.
Sea snail is a common name for snails that normally live in salt water, in other words marine gastropods. The taxonomic class Gastropoda also includes snails that live in other habitats, such as land snails and freshwater snails. Many species of sea snails are edible and exploited as food sources by humans.
Family is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy; it is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as being the "walnut family".
J.K.Tucker considers this species as a synonym of Gingicithara pessulata , family Mangeliidae.
Gingicithara pessulata is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
(Original description) The yellow or ash-coloured shell is rather sharply fusiform. The whorls are slightly convex, longitudinally ribbed. The ribs are rather distant, crossed with somewhat obsolete transverse striae. Although the ribs in this species are comparatively distant from each other, they vary considerably in this respect in different individuals: the more elongated the shell, the closer the ribs. The outer lip is thin. The sinus is small. The siphonal canal is rather short, a little recurved.
A whorl is a single, complete 360° revolution or turn in the spiral growth of a mollusc shell. A spiral configuration of the shell is found in of numerous gastropods, but it is also found in shelled cephalopods including Nautilus, Spirula and the large extinct subclass of cephalopods known as the ammonites.
In the shell of gastropod mollusks, the lip is the free margin of the peristome or aperture of the gastropod shell.
The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water is drawn into the mantle cavity and over the gill and which serves as a chemoreceptor to locate food. In certain groups of carnivorous snails, where the siphon is particularly long, the structure of the shell has been modified in order to house and protect the soft structure of the siphon. Thus the siphonal canal is a semi-tubular extension of the aperture of the shell through which the siphon is extended when the animal is active.
This marine species occurs off the Philippines.
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