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In Rome itself the word forum denoted the flat and formerly marshy space between the Palatine and Capitoline hills (also called forum Romanum), which even during the regal period accommodated such public meetings as could not be held within the area Capitolina. In early times the forum Romanum was used for gladiatorial games, and over the colonnades were galleries for spectators; there were also shops of various kinds. Under the Roman Empire, when the forum became primarily a centre for religious and secular spectacles and ceremonies, it was the site of many of the city’s most imposing temples and monuments. Among the structures surviving in whole or in part are the Temple of Castor and Pollux, the Temple of the Deified Caesar, the Mamertine Prison, the Curia (Senate house), the Temple of Saturn, the Temple of Vesta, the Temple of Romulus, the Arch of Titus, the Arch of Septimius Severus, and the Cloaca Maxima. Also during the imperial period a considerable number of new forums, the fora civilia (judicial) and venalia (mercantile), came into existence. In addition to the forum Romanum, the forums of Caesar and Augustus belonged to the former class, the forum boarium (cattle), holitorium (vegetable), etc., to the latter. The 1st-century-BC architect Vitruvius stated that the ideal forum should be large enough to accommodate a large crowd but not so large as to dwarf a small one. He proposed a 3:2 length-to-breadth ratio. It is to this proportion that Trajan’s Forum in Rome was erected early in the 2nd century AD. Commissioned by the emperor Trajan and designed by Apollodorus of Damascus, it measures approximately 920 by 620 feet (about 280 by 190 m) and covers about 25 acres (10 ha). Persons entered through a triple gateway into a colonnaded open space lined with merchants’ booths. The forum is flanked by two semicircular, colonnaded exedrae. Opposite the gateway is the Basilica Ulpia, beyond which is Trajan’s Column, carved with relief sculpture depicting Trajan’s victories. The aesthetic harmony of this space has influenced many subsequent town planners.
Jadobe · 2 months ago
Zebra mussel is a small shellfish
Color patterns vary, with only dark or colored shells or no stripes. They are typically found attached to objects, surfaces, or each other by threads underneath the shells. Although similar in appearance to the quagga mussel, the two species can be easily distinguished. When placed on a surface zebra mussels are stable on their flattened underside while quagga mussels, lacking a flat underside, will fall over. |
Jadobe · 2 months ago
Die Harnischwelse (Loricariidae)
Die Harnischwelse (Loricariidae) sind eine in Mittel- und Südamerika vorkommende Familie der Ordnung der Welsartigen. Mit mehr als 80 Gattungen, über 820 beschriebenen und geschätzt 700 bis heute unbeschriebenen Arten sind sie die artenreichste Familie der Welsartigen und eine der artenreichsten Fischfamilien überhaupt. |
Jadobe · 2 months ago
Les Loricariidés (Loricariidae)
Les Loricariidés (Loricariidae) sont la plus grande famille de poissons-chats (ordre des Siluriformes), avec 1 000[1] espèces connues et de nouvelles espèces décrites chaque année. Les Loricariidés proviennent des eaux douces du Costa Rica, du Panama, et des zones tropicales et subtropicales d'Amérique du Sud. On connaît des Loricariidés dans toutes les eaux douces du Panama à l'Argentine. Ces poissons sont connus pour leur ventouse buccale, et les plaques osseuses couvrant leur corps. Plusieurs genres sont vendus sous le nom de plécos, notamment le Pléco commun, et sont très populaires en aquariophilie. Plusieurs espèces sont connues pour produire des sons de stridulation grâce à leurs épines pectorales[2]. |
Jadobe · 2 months ago
L-number
The L-number system is a semi-scientific classification system of catfish based on photographs of shipments of tropical catfish of the family Loricariidae published by the German aquarium magazine DATZ (Die Aquarien- und Terrarienzeitschrift (The Aquarium and Terrarium Magazine)). The first L-number was published in 1988. |
Jadobe · 2 months ago
Baryancistrus xanthellus in wiki
Baryancistrus xanthellus (L018, L081, L085, L177, LDA060) er en art av harniskmaller i gruppen Ancistrini. Det er en bunnlevende ferskvannsfisk som finnes i Rio Xingu i Amazonas-vassdraget. Den blir opptil 29,7 cm lang SL[1]. Baryancistrus xanthellus er på grunn av sitt spesielle utseende en populær akvariefisk, og har fram til arten ble beskrevet i 2011 gått under forskjellige L-numre, samt det engelske populærnavnet «gold nugget» eller «golden nugget» i akvariehandelen. |
Jadobe · 2 months ago
Odontode (Wikipedia)
Odontodes, or dermal teeth, are hard structures found on the external surfaces of animals or near internal openings. They consist of a soft pulp cavity surrounded by dentine and covered by a mineralised substance such as enamel, a structure similar to that of teeth.[1] They generally do not have the same function as teeth, and are not replaced the same way teeth are in most fish.[2] In some animals (notably catfish), the presence or size of odontodes can be used in determining the sex.[3] |
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