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Chamaesipho
''Chamaesipho'' is a genus of four-plated notochthamaline barnacles in the Pacific Ocean limited to Australian/New Zealand temperate waters. They are intertidal in preference, and tend to form crowded columnar colonies. They can be identified in the field by having a four-plated wall, an unfused rostrum, and narrow opercular plates. ''Elminius'', which also inhabits the same area, has four plates in its shell wall. However, in ''Elminius'', the rostrum and rostrolatera are fused completely, and the compound rostrum receives the alae of the adjacent carinolaterals. In ''Chamaesipho'', the unfused rostrum bears alae, and closely resembles the carina in appearance. Definition and Discussion The primary shell wall is four plated, reduced from six by fusion of rostrolatera and carinolatera during ontogeny. No sutural interfolding is observed. With age, all plate sutures become concrescent. The basis is membraneous. Opercular plates are deeply articulated, but do not fuse together. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamaesipho Columna
''Chamaesipho columna'' is the type species for the barnacle genus ''Chamaesipho''. Originally, species concept, as refined by Darwin472 consisted of ''C. columna''. Spengler's 1790 description included specimens from "Otaheite" (), which were far larger than any of the three described species. As '''' is restricted to Australia and New Zealand, and Spengler's Tahiti material lacked opercular plates, it is no longer included as ''''. Spengler's written desc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamaesipho Scutelliformis
''Chamaesipho'' is a genus of four-plated notochthamaline barnacles in the Pacific Ocean limited to Australian/New Zealand temperate waters. They are intertidal in preference, and tend to form crowded columnar colonies. They can be identified in the field by having a four-plated wall, an unfused rostrum, and narrow opercular plates. '' Elminius'', which also inhabits the same area, has four plates in its shell wall. However, in ''Elminius'', the rostrum and rostrolatera are fused completely, and the compound rostrum receives the alae of the adjacent carinolaterals. In ''Chamaesipho'', the unfused rostrum bears alae, and closely resembles the carina in appearance. Definition and Discussion The primary shell wall is four plated, reduced from six by fusion of rostrolatera and carinolatera during ontogeny. No sutural interfolding is observed. With age, all plate sutures become concrescent. The basis is membraneous. Opercular plates are deeply articulated, but do not fuse together. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamaesipho Tasmanica
''Chamaesipho tasmanica'' is an intertidal shoreline barnacle of Australia. Its principal range centers in New South Wales, and Tasmania. Columnar colonies can be found on high intertidal rocks relatively free of dense seaweed. Individuals are small, less than 15 mm, and grayish in color. Definition and discussion ''Chamaesipho tasmanica'' is a small species, with carinorostral diameter of about 10 mm, much smaller than '' Chamaesipho brunnea'', and similar in size to ''Chamaesipho columna''. Crowded colonies become columnar. The scutum possesses a clear rounded adductor ridge, best developed of all species of ''Chamaesipho''. Articular ridge is large, rounded, with deep articular furrow. The tergum is higher than the other two species, with a broad distinct articular furrow, and 3-7 tergal depressor crests, and no tergal spur. Card setae are present only on anterior rami of cirrus I and cirrus II. Nomenclature and synonymy * ''Chamaesipho tasmanica'' Foster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamaesipho Grebneffi
''Chamaesipho grebneffi'' is the first extinct member of the Notochthamalinae to be described, and the oldest chthamaloid barnacle known. This species is a fully derived ''Chamaesipho'', and indicates a considerable antiquity for Chthamaloidea. Three extinct species of '' Chthamalus'' from the middle Miocene of the faluns of Touraine, France were described in 2008 by Carriol. the New Zealand species is Oligocene, and considerably older. Discussion Like the three living species of ''Chamaesipho'', the shell of ''C. grebneffi'' begins with 6 plates, fusing completely at about 2 mm diameter. Freegrown specimens show a stellate basal outline. The scutum is highly distinctive in tergal margin equal in length to basal margin. In all other ''Chamaesipho'', tergal margin is much shorter than basal. The tergum is not definitely identified. ''Chamaesipho grebneffi'' is interpreted, from wear patterns on the shell, to have occupied high littoral The littoral zone or nearshore i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamaesipho Brunnea
''Chamaesipho brunnea'' is an intertidal barnacle common in New Zealand, in both the North Island and the South Island. Juveniles have six shell wall plates, reducing to four in adults, and with age, all plates become concrescent, with no trace of sutures inside or out. Shell is brown colored. The related, and sometimes associated ''Chamaesipho columna'' is much smaller in size, by nearly half, while '' Elminius'', which can associate with both species, also has four shell wall plates, but plates remain distinct at all stages. The shell of ''C. columna'' corrodes to a pitted surface, while that of ''C. brunnea'' has a lamellar corrosion. Diagnosis and discussion The shell in non-crowded specimens of ''Chamaesipho brunnea'' is usually low conic, brown with prominent growth ridges basally, corroded upper sections are whiter and smoother. Crowded individuals become columnar. Shell wall in juveniles, to 4 mm maximum diameter consists of six plates, which then reduce to four by fu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleogene
The Paleogene ( ; British English, also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period, geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago (annum, Mya) to the beginning of the Neogene Period Mya. It is the beginning of the Cenozoic Era of the present Phanerozoic Eon. The earlier term Tertiary Period was used to define the span of time now covered by the Paleogene Period and subsequent Neogene Period; despite no longer being recognised as a formal stratigraphy, stratigraphic term, 'Tertiary' is still widely found in earth science literature and remains in informal use. Paleogene is often abbreviated "Pg" (but the United States Geological Survey uses the abbreviation PE for the Paleogene on the Survey's geologic maps). During the Paleogene, evolution of mammals, mammals diversified from relatively small, simple forms into a large group of diverse animals in the wake of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligocene
The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch are slightly uncertain. The name Oligocene was coined in 1854 by the German paleontologist Heinrich Ernst Beyrich from his studies of marine beds in Belgium and Germany. The name comes from the Ancient Greek (''olígos'', "few") and (''kainós'', "new"), and refers to the sparsity of extant forms of molluscs. The Oligocene is preceded by the Eocene Epoch and is followed by the Miocene Epoch. The Oligocene is the third and final epoch of the Paleogene Period. The Oligocene is often considered an important time of transition, a link between the archaic world of the tropical Eocene and the more modern ecosystems of the Miocene. Major changes during the Oligocene included a global expansion o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epopella
''Epopella'' is a genus of symmetrical sessile barnacles in the family Tetraclitidae Tetraclitidae is a family of sessile barnacles in the order Balanomorpha The Balanomorpha are an order of barnacles, containing familiar acorn barnacles of the seashore. The order contains these families: * Austrobalanidae Newman & Ross, 197 .... There are about six described species in ''Epopella''. Characteristics Species These species belong to the genus ''Epopella'': * '' Epopella breviscutum'' (Broch, 1922) * '' Epopella eoplicata'' Buckeridge, 1983 * '' Epopella eosimplex'' (Darwin, 1854) * '' Epopella kermadeca'' Foster, 1978 * '' Epopella plicata'' (Gray, 1843) * '' Epopella simplex'' (Darwin, 1854) References Barnacles {{crustacean-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tahiti
Tahiti (; Tahitian ; ; previously also known as Otaheite) is the largest island of the Windward group of the Society Islands in French Polynesia. It is located in the central part of the Pacific Ocean and the nearest major landmass is Australia. Divided into two parts, ''Tahiti Nui'' (bigger, northwestern part) and ''Tahiti Iti'' (smaller, southeastern part), the island was formed from volcanic activity; it is high and mountainous with surrounding coral reefs. Its population was 189,517 in 2017, making it by far the most populous island in French Polynesia and accounting for 68.7% of its total population. Tahiti is the economic, cultural and political centre of French Polynesia, an overseas collectivity and an overseas country of the French Republic. The capital of French Polynesia, Papeete, is located on the northwest coast of Tahiti. The only international airport in the region, Faaā International Airport, is on Tahiti near Papeete. Tahiti was originally settled by Pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otaheite
Tahiti (; Tahitian ; ; previously also known as Otaheite) is the largest island of the Windward group of the Society Islands in French Polynesia. It is located in the central part of the Pacific Ocean and the nearest major landmass is Australia. Divided into two parts, ''Tahiti Nui'' (bigger, northwestern part) and ''Tahiti Iti'' (smaller, southeastern part), the island was formed from volcanic activity; it is high and mountainous with surrounding coral reefs. Its population was 189,517 in 2017, making it by far the most populous island in French Polynesia and accounting for 68.7% of its total population. Tahiti is the economic, cultural and political centre of French Polynesia, an overseas collectivity and an overseas country of the French Republic. The capital of French Polynesia, Papeete, is located on the northwest coast of Tahiti. The only international airport in the region, Faaā International Airport, is on Tahiti near Papeete. Tahiti was originally settled by Polyne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinochthamalus
''Chinochthamalus'' is a genus of star barnacles in the family Chthamalidae The Chthamalidae are a family of chthamaloid barnacles, living entirely in intertidal/subtidal habitats, characterized by a primary shell wall of eight, six, or four plates, lacking imbricating plate whorls, and either membraneous or more rare .... There is one described species in ''Chinochthamalus'', ''C. scutelliformis''. References Barnacles {{crustacean-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Philippines (mainly Luzon, Mindoro and Palawan), and in the south by Borneo, eastern Sumatra and the Bangka Belitung Islands, encompassing an area of around . It communicates with the East China Sea via the Taiwan Strait, the Philippine Sea via the Luzon Strait, the Sulu Sea via the straits around Palawan (e.g. the Mindoro and Balabac Straits), the Strait of Malacca via the Singapore Strait, and the Java Sea via the Karimata and Bangka Straits. The Gulf of Thailand and the Gulf of Tonkin are also part of the South China Sea. The shallow waters south of the Riau Islands are also known as the Natuna Sea. The South China Sea is a region of tremendous economic and geostrategic importance. One-third of the world's maritime shipping passe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
