Atrina Seminuda
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Atrina Seminuda
''Atrina seminuda'', the half-naked pen shell, is a species of bivalve mollusc in the family Pinnidae. Description It is characterized by a large shell between about 150–200 mm in triangular or wedge, the leaflets have ornamentations forming rows 10-20 tubular radial spiny projections which are often slightly curved. The surface of the leaflets tend to observe fine markings which correspond to the long lines. The coloration is variable ranging from dark brown to greenish brown. In the animal body highlights large posterior adductor muscle development, which in individuals of sizes between 150 and 200 mm can reach a diameter of about 40 mm.Lodeiros Seijos, J.M., Marin Espinosa, Baumar. y Prieto Arcas, Antulio. 1999: Catalogo de moluscos marinos de las costas nororientales de Venezuela: Clase Bivalvia. Asociación de Profesores de la Universidad de Oriente, Cumaná - Venezuela 112p.Macsotay O. & Campos. R. 2001. Moluscos representativos de la plataforma de Margarita ...
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Jean-Baptiste Lamarck
Jean-Baptiste Pierre Antoine de Monet, chevalier de Lamarck (1 August 1744 – 18 December 1829), often known simply as Lamarck (; ), was a French naturalist, biologist, academic, and soldier. He was an early proponent of the idea that biological evolution occurred and proceeded in accordance with Naturalism (philosophy), natural laws. Lamarck fought in the Seven Years' War against Prussia, and was awarded a commission for bravery on the battlefield. Posted to Monaco, Lamarck became interested in natural history and resolved to study medicine.#Packard, Packard (1901), p. 15. He retired from the army after being injured in 1766, and returned to his medical studies. Lamarck developed a particular interest in botany, and later, after he published the three-volume work ''Flore françoise'' (1778), he gained membership of the French Academy of Sciences in 1779. Lamarck became involved in the Jardin des Plantes and was appointed to the Chair of Botany in 1788. When the French Nationa ...
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Bivalve
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances. The shell of a bivalve is composed of calc ...
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Mollusc
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000  extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species. The gastropods ...
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Family (biology)
Family ( la, familia, plural ') 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 the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ...
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Pinnidae
The Pinnidae are a taxonomic family of large saltwater clams sometimes known as pen shells. They are marine bivalve molluscs in the order Pteriida. Shell description The shells of bivalves in this family are fragile and have a long and triangular shape, and in life the pointed end is anchored in sediment using a byssus. The shells have a thin but highly iridescent inner layer of nacre in the part of the shell near the umbos (the pointed end). The family Pinnidae includes the fan shell, '' Atrina fragilis'', and '' Pinna nobilis'', the source of sea silk. Some species are also fished for their food value. Human use As RosewaterRosewater, Joseph. (1961). “The Family Pinnidae in the Indo-Pacific.” ''Indo-Pacific Mollusca'', vol. 1, no. 4. September 28, 1961, pp. 175-176. commented in 1961: "“The Pinnidae have considerable economic importance in many parts of the world. They produce pearls of moderate value. In the Mediterranean area, material made from the holdfast or b ...
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North Carolina
North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and South Carolina to the south, and Tennessee to the west. In the 2020 census, the state had a population of 10,439,388. Raleigh is the state's capital and Charlotte is its largest city. The Charlotte metropolitan area, with a population of 2,595,027 in 2020, is the most-populous metropolitan area in North Carolina, the 21st-most populous in the United States, and the largest banking center in the nation after New York City. The Raleigh-Durham-Cary combined statistical area is the second-largest metropolitan area in the state and 32nd-most populous in the United States, with a population of 2,043,867 in 2020, and is home to the largest research park in the United States, Research Triangle Park. The earliest evidence of human occupation i ...
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Texas
Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by both List of U.S. states and territories by area, area (after Alaska) and List of U.S. states and territories by population, population (after California). Texas shares borders with the states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexico, Mexican States of Mexico, states of Chihuahua (state), Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the south and southwest; and has a coastline with the Gulf of Mexico to the southeast. Houston is the List of cities in Texas by population, most populous city in Texas and the List of United States cities by population, fourth-largest in the U.S., while San Antonio is the second most pop ...
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Argentina
Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the eighth-largest country in the world. It shares the bulk of the Southern Cone with Chile to the west, and is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south. Argentina is a federal state subdivided into twenty-three provinces, and one autonomous city, which is the federal capital and largest city of the nation, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system. Argentina claims sovereignty over the Falkland Islands, South Georgia and the South Sandwich Islands, and a part of Antarctica. The earliest recorded human prese ...
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Vargas, Venezuela
) , anthem = '' Carmañola Americana'' , image_map = Vargas in Venezuela.svg , map_alt = , map_caption = Location within Venezuela , pushpin_map = , pushpin_map_alt = , pushpin_mapsize = , pushpin_map_caption = , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name = Venezuela , subdivision_type1 = , subdivision_name1 = , subdivision_type2 = , subdivision_name2 = , established_title = Created , established_date = 1998 , founder = , named_for = , seat_type = Capital , seat = La Guaira , government_footnotes = , government_type = , leader_party = , governing_body= Legislative Council , leader_title = Governor , leader_name = José Manuel Suárez (2021–) , ...
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Miranda (state)
Miranda State ( es, link=no, Estado Miranda, ) is one of the 23 States of Venezuela, states of Venezuela and the second most populous after Zulia State. As of the 2011 census, it had a population of 2,675,165 residents. It also has the greatest Human Development Index in Venezuela, according to the Venezuelan National Institute of Statistics (Instituto Nacional de Estadistica, Caracas). The most recent population estimate was 3,194,390 in mid-2016. Miranda is an important center for political, economic, cultural and commercial activities. The state is administered by a governor, and is sub-divided into 21 municipalities, each under a mayor. Miranda State covers a total surface area of . History Pre-Columbian history When the Spanish arrived, the region was inhabited by various Caribbean tribes. Among them were the Caracas, the Teques, the Cumanagotos, the Mariches and the Quiriquires. The Teques inhabited the southwestern part of Guaire. The Mariches inhabited the eastern part o ...
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Anzoátegui
) , anthem = '' Himno del Estado Anzoátegui'' , image_map = Anzoategui in Venezuela.svg , map_alt = , map_caption = Location within Venezuela , pushpin_map = , pushpin_map_alt = , pushpin_mapsize = , pushpin_map_caption = , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name = Venezuela , subdivision_type1 = , subdivision_name1 = , subdivision_type2 = , subdivision_name2 = , established_title = Created , established_date = August 5, 1909 , founder = , named_for = , seat_type = Capital , seat = Barcelona , government_footnotes = , government_type = , leader_party = , governing_body= Legislative Council , leader_title = Governor , leader_name = Antonio Barreto Sira (2016) , ...
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Sucre, Venezuela
The Sucre State ( es, Estado Sucre, ) is one of the 23 states of Venezuela. The state capital is Cumaná city. Sucre State covers a total surface area of and, as of the 2011 census, had a population of 896,921. The most important river in the state is the Manzanares River. History This Venezuelan State has great historical importance, because it was the first Venezuelan land that was touched by the European navigator, Christopher Columbus. The latter, impressed by the greenness of the flora, the coasts and the crystalline water of its beaches, called the place "Tierra de Gracia". Spanish colonization The capital of the state is Cumaná, which was founded by Gonzalo de Ocampo in 1521, although Franciscan missionaries began to populate it in 1515. In 1530 it was hit by an earthquake, so it had to be rebuilt. On July 2, 1591, King Philip II of Spain granted Cumaná the title of city. In 1639, conflicts appeared in the Cumanacoa Valley, as the well-known conqueror Juan de ...
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