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Gastropod Shell
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, ostracum, is typically made of calcium carbonate (CaCO3) precipitated into an organic matrix ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neptunea - Links&rechts Gewonden
''Neptunea'' is a genus of large sea snails, marine gastropod mollusks in the subfamily Neptuneinae of the family Buccinidae, the true whelks.Bouchet, P.; Gofas, S. (2010). ''Neptunea'' Röding, 1798. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=137710 on 2010-11-02 Species According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus ''Neptunea'': *'' Neptunea acutispiralis'' *'' Neptunea alabaster'' *'' Neptunea alexeyevi'' *'' Neptunea amianta'' *'' Neptunea angulata'' *'' Neptunea antarctocostata'' *'' Neptunea antiqua'' *'' Neptunea arthritica'' *'' Neptunea aurigena'' *'' Neptunea behringiana'' *'' Neptunea borealis'' *'' Neptunea bulbacea'' *'' Neptunea communis'' *'' Neptunea constricta'' *'' Neptunea contraria'' *'' Neptunea convexa'' *'' Nep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abalone
Abalone ( or ; via Spanish , from Rumsen language, Rumsen ''aulón'') is a common name for any small to very large marine life, marine gastropod mollusc in the family (biology), family Haliotidae, which once contained six genera but now contains only one genus, ''Haliotis''. Other common names are ear shells, sea ears, and, now rarely, muttonfish or muttonshells in parts of Australia, ormer in the United Kingdom, perlemoen in South Africa, and pāua in New Zealand. The number of abalone species recognized worldwide ranges between 30 and 130 with over 230 species-level taxa described. The most comprehensive treatment of the family considers 56 species valid, with 18 additional subspecies. The gastropod shell, shells of abalone have a low, open spiral structure, and are characterized by several open respiratory pores in a row near the shell's outer edge. The thick inner layer of the shell is composed of nacre, which in many species is highly iridescence, iridescent, giving rise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dextral Coiling
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it ( semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the mantle. The calcareous central layer, ostracum, is typically made of calcium carbonate (CaCO3) precipitated into an organic matrix known as conchiolin. The outermost ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vermetidae
The Vermetidae, the worm snails or worm shells, are a taxonomic family of small to medium-sized sea snails, marine gastropod molluscs in the clade Littorinimorpha. The shells of species in the family Vermetidae are extremely irregular, and do not resemble the average snail shell, hence the common name "worm shells" or "worm snails". These snails usually grow cemented onto a hard surface, or cemented together in colonies. Shell description These snails do not have typical regularly coiled gastropod shells; instead, they have very irregular elongated tubular shells which are moulded to, and cemented to, a surface of attachment such as a rock or another shell. In the adult, the apertural part of the shell is usually free, with the opening directed upward. Some species have an operculum and some do not. Damaged sections of the shell can be sealed off by calcareous septa when necessary. Some vermetids are solitary, whereas others live in colonies, partially cemented together. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terebra
''Terebra'' is a genus of small to large-sized predatory sea snails, marine (ocean), marine gastropod molluscs in the subfamily Terebrinae of the family (biology), family Terebridae, the auger snails. Species in this genus do not possess a radula. Species Species in the genus ''Terebra'' include: * ''Terebra achates'' Weaver, 1960 * ''Terebra adamsii'' E. A. Smith, 1873 * ''Terebra agulha'' Terryn, 2022 * ''Terebra aikeni'' Terryn & Welsh, 2020 * ''Terebra alabaster'' Terryn, 2022 * ''Terebra albocancellata'' Bratcher, 1988 * ''Terebra albomarginata'' Deshayes, 1859 * ''Terebra amanda'' Hinds, 1844 * ''Terebra anilis'' (Röding, 1798) * ''Terebra archimedis'' Deshayes, 1859 * ''Terebra argosyia'' Olsson, 1971 * ''Terebra argus'' Hinds, 1844 * ''Terebra babylonia'' Jean-Baptiste Lamarck, Lamarck, 1822 * ''Terebra balabacensis'' Aubry & Picardal, 2011 * ''Terebra bellanodosa''Grabau & S. G. King, 1928 * ''Terebra binii'' Aubry, 2014 * ''Terebra boucheti'' Bratcher, 1981 * ''Terebr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olive Snail
The olive, botanical name ''Olea europaea'' ("European olive"), is a species of subtropical evergreen tree in the family Oleaceae. Originating in Asia Minor, it is abundant throughout the Mediterranean Basin, with wild subspecies in Africa and western Asia; modern cultivars are traced primarily to the Near East, Aegean Sea, and Strait of Gibraltar. The olive is the type species for its genus, ''Olea'', and lends its name to the Oleaceae plant family, which includes species such as lilac, jasmine, forsythia, and ash. The olive fruit is classed botanically as a drupe, similar to the cherry or peach. The term oil—now used to describe any viscous water-insoluble liquid—was virtually synonymous with olive oil, the liquid fat made from olives. The olive has deep historical, economic, and cultural significance in the Mediterranean; Georges Duhamel remarked that the "Mediterranean ends where the olive tree no longer grows". Among the oldest fruit trees domesticated by hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intertidal
The intertidal zone or foreshore is the area above water level at low tide and underwater at high tide; in other words, it is the part of the littoral zone within the tidal range. This area can include several types of habitats with various species of life, such as sea stars, sea urchins, and many species of coral with regional differences in biodiversity. Sometimes it is referred to as the ''littoral zone'' or '' seashore'', although those can be defined as a wider region. The intertidal zone also includes steep rocky cliffs, sandy beaches, bogs or wetlands (e.g., vast mudflats). This area can be a narrow strip, such as in Pacific islands that have only a narrow tidal range, or can include many meters of shoreline where shallow beach slopes interact with high tidal excursion. The peritidal zone is similar but somewhat wider, extending from above the highest tide level to below the lowest. Organisms in the intertidal zone are well-adapted to their environment, facing high level ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Raup
David M. Raup (April 24, 1933 – July 9, 2015) was a University of Chicago paleontologist. Raup studied the fossil record and the diversity of life on Earth. Raup contributed to the knowledge of extinction events along with his colleague Jack Sepkoski. They suggested that the extinction of dinosaurs 66 mya was part of a cycle of mass extinctions that may have occurred every 26 million years. Biography Early life Born on April 24, 1933, and raised in Boston, Raup's interest in the fossil record did not begin at a young age, having had very little contact with such things until later in life. He focused instead on leisure activities such as skiing and camping. His first mentor was John Clark, a vertebrate paleontologist and sedimentologist at the University of Chicago while starting his education. Career Raup began his academic career at Colby College in Maine before transferring two years later to the University of Chicago where he earned his Bachelor of Science degree. From th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cowry
Cowrie or cowry () is the common name for a group of small to large sea snails in the family Cypraeidae. Cowrie shells have held cultural, economic, and ornamental significance in various cultures. The cowrie was the shell most widely used worldwide as shell money. It is most abundant in the Indian Ocean, and was collected in the Maldive Islands, in Sri Lanka, along the Indian Malabar coast, in Borneo and on other East Indian islands, in Maluku in the Pacific, and in various parts of the African coast from Ras Hafun, in Somalia, to Mozambique. Cowrie shell money was important in the trade networks of Africa, South Asia, and East Asia. In the United States and Mexico, cowrie species inhabit the waters off Central California to Baja California (the chestnut cowrie is the only cowrie species native to the eastern Pacific Ocean off the coast of the United States; further south, off the coast of Mexico, Central America and Peru, Little Deer Cowrie habitat can be found; and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conch
Conch ( , , ) is a common name of a number of different medium-to-large-sized sea snails. Conch shells typically have a high Spire (mollusc), spire and a noticeable siphonal canal (in other words, the shell comes to a noticeable point on both ends). Conchs that are sometimes referred to as "true conchs" are Marine (ocean), marine gastropods in the family (biology), family Strombidae, specifically in the genus ''Strombus'' and other closely related genera. For example, ''Aliger gigas'', the queen conch, is a true conch. True conchs are identified by their long spire. Many other species are also often called "conch", but are not at all closely related to the family Strombidae, including ''Melongena'' species (family Melongenidae) and the horse conch ''Triplofusus papillosus'' (family Fasciolariidae). Species commonly referred to as conches also include the sacred chank or ''shankha'' shell (''Turbinella pyrum'') and other ''Turbinella'' species in the family Turbinellidae. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Murex
''Murex'' is a genus of medium to large sized predatory tropical sea snails. These are carnivorous marine gastropod molluscs in the family Muricidae, commonly called "murexes" or "rock snails".Houart, R.; Gofas, S. (2010). Murex Linnaeus, 1758. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138196 on 2011-04-09 The common name murex is still used for many species in the family Muricidae which were originally given the Latin generic name ''Murex,'' but have more recently been regrouped into newer genera. ''Murex'' was used in antiquity to describe spiny sea snails, especially those associated with the production of purple dye''. Murex'' is one of the oldest classical seashell names still used by the scientific community. Aristotle described these mollusks in his ''History of Animals'' using the Greek term πορφύρα (''porphyra'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cone Shell
''Conus'' is a genus of venomous and predatory cone snails.Bouchet, P.; Gofas, S. (2015). Conus Linnaeus, 1758. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=137813 on 2015-11-12 Prior to 2009, it included all cone snail species but is now more precisely defined. Description The thick shell of species in the genus ''Conus'' sensu stricto, is obconic, with the whorls enrolled upon themselves. The spire is short, smooth or tuberculated. The narrow aperture is elongated with parallel margins and is truncated at the base. The operculum is very small relative to the size of the shell. It is corneous, narrowly elongated, with an apical nucleus, and the impression of the muscular attachment varies from one-half to two-thirds of the inner surface. The outer lip shows a slight sutural sinus. Distribution and habitat Species in the genus ''Conus'' sensu stricto can be found in the tropical and subtr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
