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Obolidae
Obolidae is a family of extinct brachiopod Brachiopods (), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, w ...s. Species Obolidae species include:Emig C. C., Bitner M. A. & Álvarez F., 2019Linguliformea Brachiopoda database. Accessed 2020-09-27. *'' Obolus apollinis'' Eichwald, 1829 *'' Schmidtites celatus'' (Volborth, 1869) References Brachiopod families Lingulata {{brachiopod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obolus Apollinis
The obol ( grc-gre, , ''obolos'', also wikt:ὀβελός, ὀβελός (''obelós''), wikt:ὀβελός, ὀβελλός (''obellós''), wikt:ὀβελός, ὀδελός (''odelós''). "nail, metal spit"; la, obolus) was a form of ancient Greek currency and weight. Currency Obols were used from early times. According to Plutarch they were originally spits of copper or bronze traded by weight, while six obols make a drachma or a handful, since that was as many as the hand could grasp. Heraklides of Pontus (died ca. 310 BC) is cited as having mentioned the obols of Heraion and also gives the etymology of ''obolos'' (the name of the coin) from ''obelos'' (the word for "spit, spike, nail"). Similarly, the historian Ephorus in his equally lost work ''On Inventions'' (mid 4th century BC) is said to have mentioned the obols of Heraion. Excavations at Ancient Argos, Argos discovered several dozen of these early obols, dated well before 800 BC; they are now displayed a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachiopod
Brachiopods (), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major categories are traditionally recognized, articulate and inarticulate brachiopods. The word "articulate" is used to describe the tooth-and-groove structures of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic skeletal feature, by which the two main groups can be readily distinguished as fossils. Articulate brachiopods have toothed hinges and simple, vertically-oriented opening and closing muscles. Conversely, inarticulate brachiopods have weak, untoothed hinges and a more complex system of vertical and oblique (diagonal) muscles used to keep the two valves aligned. In many brachiopods, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachiopod Families
Brachiopods (), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major categories are traditionally recognized, articulate and inarticulate brachiopods. The word "articulate" is used to describe the tooth-and-groove structures of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic skeletal feature, by which the two main groups can be readily distinguished as fossils. Articulate brachiopods have toothed hinges and simple, vertically-oriented opening and closing muscles. Conversely, inarticulate brachiopods have weak, untoothed hinges and a more complex system of vertical and oblique (diagonal) muscles used to keep the two valves aligned. In many brachiopods, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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