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Tarso Toh
Tarso Toh (also known as Tarso Toon or Tarson Tôh) is a volcanic field located in Chad, north of Tarso Toussidé volcano. It fills valleys and plains over an area of 80 km in east-west direction and 20–30 km in north-south direction. It contains 150 scoria cones and two maars. Tarso Toh is a volcanic plateau and has lateral dimensions of , resulting in a surface area of about . It rises to elevations of above sea level and above the surrounding terrain. The plateau encompasses about 150 separate volcanoes, some of which are found in remnants. Some lava flows at Tarso Toh have reached large distances. Part of the field is the Begour crater. It is about wide and is mostly dry with the exception of several small ponds and a ring of diatom- and mollusc-containing sediments which forms a ring terrace inside the crater. Radiocarbon dating has yielded ages of 8,300 ± 300 years ago on sediments within Begour, and Tarso Toh is considered to be a Holocene volcano. The T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chad
Chad (; ar, تشاد , ; french: Tchad, ), officially the Republic of Chad, '; ) is a landlocked country at the crossroads of North and Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon to the southwest, Nigeria to the southwest (at Lake Chad), and Niger to the west. Chad has a population of 16 million, of which 1.6 million live in the capital and largest city of N'Djamena. Chad has several regions: a desert zone in the north, an arid Sahelian belt in the centre and a more fertile Sudanian Savanna zone in the south. Lake Chad, after which the country is named, is the second-largest wetland in Africa. Chad's official languages are Arabic and French. It is home to over 200 different ethnic and linguistic groups. Islam (55.1%) and Christianity (41.1%) are the main religions practiced in Chad. Beginning in the 7th millennium BC, human populations moved into the Chadian basin in great numbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wadi
Wadi ( ar, وَادِي, wādī), alternatively ''wād'' ( ar, وَاد), North African Arabic Oued, is the Arabic term traditionally referring to a valley. In some instances, it may refer to a wet (ephemeral) riverbed that contains water only when heavy rain occurs. Etymology The term ' is very widely found in Arabic toponyms. Some Spanish toponyms are derived from Andalusian Arabic where ' was used to mean a permanent river, for example: Guadalcanal from ''wādī al-qanāl'' ( ar, وَادِي الْقَنَال, "river of refreshment stalls"), Guadalajara from ''wādī al-ḥijārah'' ( ar, وَادِي الْحِجَارَة, "river of stones"), or Guadalquivir, from ''al-wādī al-kabīr'' ( ar, اَلْوَادِي الْكَبِير, "the great river"). General morphology and processes Wadis are located on gently sloping, nearly flat parts of deserts; commonly they begin on the distal portions of alluvial fans and extend to inland sabkhas or dry lakes. In basin and r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thapsia Vestii
''Thapsia'' is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Sheldoniinae of the family Urocyclidae. MolluscaBase eds. (2022). MolluscaBase. Thapsia E. von Martens, 1860. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=996919 on 2022-09-24 Distribution Species in this genus are found in tropical western Africa, from Senegal to Gabon. Description Species attributed to the genus ''Thapsia'' sensu lato have shell diameters ranging from about 15 to 30 mm, with 5½-6½ whorls. These rather featureless dextral shells are characterized by a low spire and their yellow to brown color. The spiral sculpture of the postembryonic shell is slender. In some larger * The sculpture of the radial ribs is formed crosswise (like the letter X) or beadlike. The foot shows a long caudal horn. Species ''Thapsia'' was originally designated in 1860 by German zoologist Johann Christian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Succinea
''Succinea'', common name the amber snails, is a large genus of small, air-breathing land snails, terrestrial pulmonate gastropod molluscs in the family Succineidae. MolluscaBase eds. (2021). MolluscaBase. Succinea Draparnaud, 1801. Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=181586 on 2021-02-23 The common name refers to the fact that live snails in this genus are translucent and similar to amber in appearance. Description The length of the shell ranges between 9.4 mm and 17 mm, the width between 6.8 mm and 11.5 mm. The dextrous, pointed ovoid shell consists of 3⅓ - 3½ whorls. It is thin-walled, glossy and translucent. The protoconch is very compact. The spire is short and consists mainly of a large, wide body whorl and an oval aperture with a sharp angle at the top. The deep sutures are prominent.The interior surface of the aperture is cream-colored or white. The shell is usually light brown, but may b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Segmentina Angusta
''Segmentina'' is a genus of very small, air-breathing, freshwater snails, aquatic gastropod mollusks or micromollusks in the family Planorbidae, the ramshorn snails. Albrecht et al. (2007)Albrecht C., Kuhn K. & Streit B. (2007). "A molecular phylogeny of Planorboidea (Gastropoda, Pulmonata): insights from enhanced taxon sampling". '' Zoologica Scripta'' 36: 27-39. . have confirmed the placement of this genus in the tribe Segmentinini within subfamily Planorbinae. Species Species in this genus include: *''Segmentina avecenninae'' *'' Segmentina bouilleti'' *'' Segmentina bugense'' *''Segmentina cantori'' *'' Segmentina caucasica'' *''Segmentina chevalieri'' *'' Segmentina congenera'' *''Segmentina distinguenda'' *''Segmentina drenici'' *''Segmentina filocincta'' *''Segmentina haueri'' *''Segmentina lartetii'' *''Segmentina loczyi'' *''Segmentina malkae'' *''Segmentina mica'' *''Segmentina molytes'' *''Segmentina montgazoniana'' *'' Segmentina nitida'' *''Seg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pisidium
''Pisidium'' is a genus of very small or minute freshwater clams known as pill clams or pea clams, aquatic bivalve molluscs in the family Sphaeriidae, the pea clams and fingernail clams. In some bivalve classification systems, the family Sphaeriidae is referred to as Pisidiidae, and occasionally ''Pisidium'' species are grouped in a subfamily known as Pisidiinae. ''Pisidium'' and taphonomy In large enough quantities, the minute shells of these bivalves can affect environmental conditions, and this change in conditions can positively affect the ability of organic remains in the immediate environment to fossilize (one aspect of taphonomy). For example, in the Dinosaur Park Formation, the fossil remains of hadrosaur eggshells are rare. This is because the breakdown of tannins from the local coniferous vegetation caused the ancient waters to be acidic, and therefore usually eggshell fragments dissolved in the water before they had a chance to be fossilized. Hadrosaur eggshell fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melanoides Tuberculata
The red-rimmed melania (''Melanoides tuberculata''), also known as Malayan livebearing snails or Malayan/Malaysian trumpet snails (often abbreviated to MTS) by aquarists, is a species of freshwater snail with an operculum, a parthenogenetic, aquatic gastropod mollusk in the family Thiaridae. The common name comes from the presence of reddish spots on the otherwise greenish-brown shell. The species name is sometimes spelled ''Melanoides tuberculatus'', but this is incorrect because ''Melanoides'' Olivier, 1804 was clearly intended to be feminine because it was combined with the feminine specific epithet ''fasciolata'' in the original description."Genus: ''Melanoides''" ''Molluscs of central Europe'', accessed 19 April 2011. This species is native to northern Africa and southern Asia, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lymnaea Natalensis
''Radix natalensis'' is a species of freshwater snail, an aquatic gastropod mollusc in the family Lymnaeidae. This species occurs widely in Africa. It is a major intermediate host for ''Fasciola gigantica'' in Africa. Placement of this species in the genus ''Radix'' was confirmed by Correa et al. (2010). Distribution ''Radix natalensis'' is a widespread species in Africa, occurring from northern Africa to southern Africa: * Northern Africa: Algeria, Tunisia, Egypt, Sudan. There are also findings of distribution of ''Radix natalensis'' in Algeria 8–10,000 years ago. In Egypt it has been detected in water bodies of the Nile Delta. * Western Africa: Benin, Burkina Faso, Côte d'Ivoire, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mali, Niger, Nigeria and Senegal, Sarr A., Kinzelbach R. & Diouf M. (2011, in press). "Diversité spécifique et écologie des mollusques continenatux de la basse vallée du Ferlo (Sénégal). pecific diversity and ecology of continental molluscs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastrocopta Klunzingeri
''Gastrocopta klunzingeri'' is a species of gastropods belonging to the family Gastrocoptidae Gastrocoptidae is a family of minute, air-breathing land snails, terrestrial pulmonate gastropod molluscs in the superfamily Pupilloidea.Philippe Bouchet, Jean-Pierre Rocroi, Bernhard Hausdorf, Andrzej Kaim, Yasunori Kano, Alexander Nützel, .... The species is found in Africa. The species inhabits terrestrial environments. References Gastrocoptidae {{Improve categories, date=February 2022 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulinus Truncatus
''Bulinus truncatus'' is a species of air-breathing freshwater snail with a sinistral shell, an aquatic pulmonate gastropod mollusk in the subfamily Bulininae of the family Bulinidae, the ram's horn snails and the like. MolluscaBase eds. (2021). MolluscaBase. Bulinus truncatus (Audouin, 1827). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=716338 on 2022-01-14 ;Subspecies: * ''Bulinus truncatus contortus'' (Michaud, 1829) (synonym: ''Physa contorta'' Michaud, 1829 ) * ''Bulinus truncatus rivularis'' (Philippi, 1836) * ''Bulinus truncatus truncatus'' (Audouin, 1827) Distribution Distribution of ''Bulinus truncatus'' include: *Africa: Egypt, Morocco Northern Sahara, D.R. Congo, Malawi and Ethiopia. * in Ferlo Valley, Western Africa: Senegal Sarr A., Kinzelbach R. & Diouf M. (2011, in press). "Diversité spécifique et écologie des mollusques continenatux de la basse vallée du Ferlo (Sénégal). pecific di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biomphalaria Pfeifferi
''Biomphalaria pfeifferi'' is a species of air-breathing freshwater snail, an aquatic animal pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails. This snail is a medically important pest, because of transferring the disease schistosomiasis. Distribution ''Biomphalaria pfeifferi'' is an African species. It has recently expanded its native range. Distribution of ''Biomphalaria pfeifferi'' include: * Western Africa: Senegal Sarr A., Kinzelbach R. & Diouf M. (2011, in press). "Diversité spécifique et écologie des mollusques continenatux de la basse vallée du Ferlo (Sénégal). pecific diversity and ecology of continental molluscs from the Lower Ferlo Valley (Senegal). ''MalaCo'' 7: 8 ppPDF. * Eastern Africa: Kenya The type locality is Umgani-Valley, Natal, South Africa (in the times of the description it was the British Colony of Natal). Phylogeny A cladogram showing phylogenic relations of species in the genus ''Biomphalaria'': Ecology ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anisus Dallonii
''Anisus'' is a genus of small air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the subfamily Planorbinae of the family Planorbidae, the ramshorn snails and their allies.Rosenberg, G.; Bouchet, P. (2014). Anisus. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=716342 on 2014-11-23 Species The genus contains the following species: ;Subgenus ''Anisus'' * '' Anisus calculiformis'' (Sandberger, 1874) * † '' Anisus komarovae'' Prysjazhnjuk, 1974 * † '' Anisus krambergeri'' (Halaváts, 1903) * † ''Anisus laskarevi'' Milošević, 1976 * '' Anisus leucostoma'' (Millet, 1813) * † '' Anisus septemgyratiformis'' (Gottschick, 1911) * ''Anisus septemgyratus'' (Rossmässler, 1835) * '' Anisus spirorbis'' (Linnaeus, 1758) - the type species of the genusGlöer, P. 2002 ''Die Süßwassergastropoden Nord- und Mitteleuropas''. Die Tierwelt Deutschlands, ConchBooks, Hackenheim, 326 pp., , page 254-26 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
