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Amastra Similaris
''Amastra similaris'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Description The length of the shell attains 12.5 mm, its diameter 7.7 mm The shell is umbilicate, ovate-conic, and moderately solid, with fine yet slightly rough and irregular striations on the body whorl. The spire is straightly conic, composed of 5½ moderately convex whorls. The whorls of the protoconch are smooth and distinctly convex. The body whorl is compressed around the umbilicus and exhibits a spiral groove within its boundary. The aperture is angular at both the upper and lower ends. The outer lip is obtuse and slightly thickened on the interior. The columella is straight, forming a distinct angle with the basal lip, and features a retreating, oblique fold near its base. The umbilicus is deep and well-like, contributing to the characteristic structure of the shell. Distribution This species is endemic to Hawaii, occurring on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Harper Pease
William Harper Pease (1824–1871) was a 19th-century American conchologist, shell collector and malacologist. He described many species of Indo-Pacific marine mollusks from the Cuming collection. He moved in 1849 to Honolulu, from where he continued his research One of the genera he described and named was the sea slug genus: '' Philinopsis'' Pease, 1860 Several species were named in his honor : '' Favartia peasei'' (Tryon, 1880), '' Conus peasei'' J. Brazier, 1877, ''Amygdalum peasei'' W. Newcomb, 1870 and '' Hypselodoris peasei'' (Bergh, 1880) For many years, no image of Pease was known, until a 2021 paper revealed that two (one shown above) had been discovered in the Bishop Museum The Bernice Pauahi Bishop Museum, designated the Hawaii State Museum of Natural and Cultural History, is a museum of history and science in the historic Kalihi district of Honolulu, Hawaii, Honolulu on the Hawaiian island of Oʻahu. Founded in 1 ... Archives, Honolulu. Bibliography * Peas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whorl (mollusc)
A whorl is a single, complete 360° revolution or turn in the spiral or whorled growth of a mollusc shell. A spiral configuration of the shell is found in numerous gastropods, but it is also found in shelled cephalopods including ''Nautilus'', ''Spirula'' and the large extinct subclass of cephalopods known as the ammonites. A spiral shell can be visualized as consisting of a long Cone (geometry), conical tube, the growth of which is coiled into an overall Helix, helical or planispiral shape, for reasons of both strength and compactness. The number of whorls which exist in an adult shell of a particular species depends on mathematical factors in the geometric growth, as described in D'Arcy Wentworth Thompson's classic 1917 book ''On Growth and Form'', and by David Raup. The main factor is how rapidly the conical tube expands (or flares-out) over time. When the rate of expansion is low, such that each subsequent whorl is not that much wider than the previous one, then the adult s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kauai
Kauai (), anglicized as Kauai ( or ), is one of the main Hawaiian Islands. It has an area of 562.3 square miles (1,456.4 km2), making it the fourth-largest of the islands and the 21st-largest island in the United States. Kauai lies 73 miles (117 km) northwest of Oahu, across the Kauai Channel. The island's 2020 population was 73,298. Styling itself the "Garden Isle", Kauai is the site of Waimea Canyon State Park and Nā Pali Coast State Park. It forms the bulk of Kauai County, which includes Niihau as well as the small nearby islands of Kaula and Lehua. Etymology and language Hawaiian narrative derives the name's origin from the legend of Hawaiiloa, the Polynesian navigator credited with discovering the Hawaiian Islands. The story relates that he named the island after a favorite son; a possible translation of Kauai is "place around the neck", describing how a father would carry his child. Another possible translation is "food season". Kauai was known for its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawaii
Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only state not on the North American mainland, the only state that is an archipelago, and the only state in the tropics. Hawaii consists of 137 volcanic islands that comprise almost the entire Hawaiian Islands, Hawaiian archipelago (the exception, which is outside the state, is Midway Atoll). Spanning , the state is Physical geography, physiographically and Ethnology, ethnologically part of the Polynesian subregion of Oceania. Hawaii's ocean coastline is consequently the List of U.S. states and territories by coastline, fourth-longest in the U.S., at about . The eight main islands, from northwest to southeast, are Niihau, Niihau, Kauai, Kauai, Oahu, Oahu, Molokai, Molokai, Lanai, Lānai, Kahoʻolawe, Kahoolawe, Maui, and Hawaii (island), Hawaii, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
