Odostomia clathratula
Encyclopedia
Odostomia clathratula is a species
of sea snail
, a marine
gastropod mollusk in the family
Pyramidellidae
, the pyrams and their allies.
are well rounded, the latter marked by seven narrow, almost equal, and equally spaced spiral keels, the broad space between which and the peripheral sulcus are marked by many slender axial riblets. The aperture
is oval. The outer lip
is thin, showing the external sculpture within. The columella is stout, slightly curved, strongly reflected over the reenforcing base, provided with a strong fold at its insertion.
and Panama
.
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
of sea snail
Sea snail
Sea snail is a common name for those snails that normally live in saltwater, marine gastropod molluscs....
, a marine
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 mollusk in the family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
Pyramidellidae
Pyramidellidae
Pyramidellidae, common name the pyram family, or pyramid shells, is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails, marine heterobranch gastropod molluscs or micromolluscs....
, the pyrams and their allies.
Description
The elongate-conic, slender shell is vitreous. It measures 2.5 mm. The two and one-half nuclear whorls form a depressed helicoid spire, whose axis is almost at right angles to that of the succeeding turns, in the first of which it is about one-half immersed. The seven post-nuclear whorls are very slightly rounded, strongly constricted at the sutures and prominently shouldered at the summit. They are marked by well rounded, tuberculate, axial ribs, of which 14 occur upon the first and second, 16 upon the third, 18 upon the fourth and fifth, and 24 upon the penultimate turn. In addition to the axial ribs, the whorls are marked between the sutures by four spiral cords which equal the ribs in strength, and render them tuberculate at their junction. The sutures are broadly and deeply channeled. The periphery and the somewhat prolonged base of the body whorlBody whorl
Body whorl is part of the morphology of a coiled gastropod mollusk.- In gastropods :In gastropods, the body whorl, or last whorl, is the most recently-formed and largest whorl of a spiral or helical shell, terminating in the aperture...
are well rounded, the latter marked by seven narrow, almost equal, and equally spaced spiral keels, the broad space between which and the peripheral sulcus are marked by many slender axial riblets. The aperture
Aperture (mollusc)
The aperture is an opening in certain kinds of mollusc shells: it is the main opening of the shell, where part of the body of the animal emerges for locomotion, feeding, etc....
is oval. The outer lip
Lip (gastropod)
In the shell of a gastropod mollusk , the margin of the aperture is called the lip or the peristome. In other words, this is a term used to describe part of gastropod shell anatomy....
is thin, showing the external sculpture within. The columella is stout, slightly curved, strongly reflected over the reenforcing base, provided with a strong fold at its insertion.
Distribution
The species occurs in the Pacific Ocean off the Galapagos IslandsGalápagos Islands
The Galápagos Islands are an archipelago of volcanic islands distributed around the equator in the Pacific Ocean, west of continental Ecuador, of which they are a part.The Galápagos Islands and its surrounding waters form an Ecuadorian province, a national park, and a...
and Panama
Panama
Panama , officially the Republic of Panama , is the southernmost country of Central America. Situated on the isthmus connecting North and South America, it is bordered by Costa Rica to the northwest, Colombia to the southeast, the Caribbean Sea to the north and the Pacific Ocean to the south. The...
.