| Calliostoma pellucidum pellucidum | ||||||||||||||||
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| Calliostoma pellucidum pellucidum (Valenciennes, 1846) |
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Trochus pellucidus Valenciennes, 1846 |
Calliostoma pellucidum pellucidum is a subspecies of medium-sized sea snail, a marine gastropod mollusc. In biology trinomial nomenclature refers to names for taxa below the rank of species Achille Valenciennes ( August 9, 1794 - April 13, 1865) was a French Zoologist. In Scientific nomenclature, synonyms are different Scientific names used for a single Taxon. Achille Valenciennes ( August 9, 1794 - April 13, 1865) was a French Zoologist. In Zoology, as in other branches of Biology, subspecies is the Taxonomic rank immediately subordinate to a Species. The word snail is a Common name that can be used for almost all members of the Molluscan class Gastropoda which have coiled shells in the 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 The class Gastropoda or the gastropods, also previously known as gasteropods, or univalves, and more commonly known as Snails Molluscs are animals belonging to the phylum Mollusca. There are around 250000 extant Species within the phylum with an estimated 70000 Some authors have placed this genus in the family Calliostomatidae, other malacologists have left it in the family Trochidae. In Biological classification, family ( Latin Calliostoma is a Genus of medium-sized sea Snails marine Gastropod Molluscs known as top shells. Malacology is the branch of Invertebrate Zoology which deals with the study of Mollusks the second-largest Phylum of animals in terms of described The Trochidae, Common name top snails, are a Taxonomic family of very small to large sea Snails marine Gastropod
Distribution
This subspecies is endemic to the North Island of New Zealand. Endemism is the Ecological state of being unique to a place Endemic species are not naturally found elsewhere The North Island is one of the two main islands of New Zealand, the other being the South Island. New Zealand is an Island country in the south-western Pacific Ocean comprising two main landmasses (the North Island and the South Island
Shell description
The shell is large and tall-spired, with concave upper spire outlines, but inflated later whorls, the last rounded to slightly angled at the periphery. A spire is a descriptive term for part of the shell of a Snail, a Gastropod Mollusc shell or Gastropod shell. A whorl is a single complete 360° turn in the Spiral growth of a Mollusc shell. Sculpture is of numerous sharply raised, closely beaded spiral cords, eight to ten on the penultimate whorl. Sculpture on a Mollusc shell is whatever natural 3-dimensional ornamentation exists on the outer surface of a shell apart from the basic shape of the shell itself
The external shell coloration is pinky-buff, broadly axially streaked in reddish-brown, except on the base - all cords are dotted with brown and white. The aperture is faintly iridescent. Iridescence is an Optical phenomenon in which Hue changes with the angle from which a surface is viewed
The shell height is up to 37 mm, and the width is up to 37 mm. The Millimetre ( American spelling: millimeter, symbol mm) is a unit of Length in the Metric system, equal to
References
- Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
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