Craniata is a class of brachiopods originating in the Cambrian period and still extant today. It is the only class within the subphylum Craniiformea, one of three major subphyla of brachiopods alongside linguliforms and rhynchonelliforms. Craniata is divided into three orders: the extinct Craniopsida and Trimerellida, and the living Craniida, which provides most information on their biology. Living members of the class have shells which are composed of calcite, though some extinct forms my have aragonite shells. The shells are inarticulate (lack a hinge with distinct tooth-and-socket connections) and are usually rounded in outline. There is no pedicle, with the rear edge of the body cavity having the form of a smooth and flat wall perforated by the anus.
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| rdfs:label
| - Craniata (brachiopod) (en)
- Craniiformea (es)
- Craniata (Brachiopodes) (fr)
- Craniforma (it)
- 크라니아강 (ko)
- Craniforma (nl)
- Craniata (плеченогие) (ru)
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| - Los craniformes (Craniiformea) son un subfilo de braquiópodos que se originaron en el período Cámbrico y aún existen en la actualidad. Tienen conchas calcíticas inarticuladas que son de contorno subcircular. Estos braquiópodos tiene un lofóforo no compatible y siempre están unidos a un sustrato duro en el registro fósil. Este sustrato duro suele ser otro braquiópodo. Las plicas del braquiópodo del huésped aparecerán dentro de la concha de los craniformes. La única clase dentro del subfilo Craniiformea es . La clase Craniata se divide en tres órdenes, uno de los cuales aún perdura. (es)
- Les Craniata sont une classe de brachiopodes connue depuis la fin du Cambrien il y a environ 500 Ma (millions d'années) et dont l'un des trois ordres qui lui sont rattachés, les , est représenté par des espèces encore vivantes. (fr)
- 크라니아강(Craniata, 이전에는 Craniforma)은 기원이 캄브리아기까지 거슬러 올라기며, 아직 일부 종이 현존하는 완족동물 강의 하나이다. 캄브리아기와 오르도비스기 동안에 아주 풍부했던 크라니아류는 해양 동물 속의 약 60%가 사라진 상태에서 대량 멸종으로 이어진 오르도비스기 후기 빙하기 이후 감소했다. (ko)
- Craniata L. E. Popov, M. G. Bassett, and L. E. Holmer è l'unica classe del subphylum di brachiopodi Craniformea. In precedenza era nota come Craniforma Williams, Carlson, Brunton, Holmer & Popov, 1996 e questo nome rimane molto diffuso per evitare la confusione con il gruppo Craniata di cordati. Molto numerosi durante il Cambriano e l'Ordoviciano, i Craniforma sono diminuiti in numero in seguito al periodo di glaciazione della fine dell'Ordoviciano che portò ad un'estinzione di massa, con la scomparsa di circa il 60% dei generi di animali marini. (it)
- Craniata (лат.) — класс плеченогих, выделяемый в монотипный подтип Craniiformea. Ископаемые представители известны с позднего кембрия. Насчитывают около 20 современных видов. (ru)
- Craniata is a class of brachiopods originating in the Cambrian period and still extant today. It is the only class within the subphylum Craniiformea, one of three major subphyla of brachiopods alongside linguliforms and rhynchonelliforms. Craniata is divided into three orders: the extinct Craniopsida and Trimerellida, and the living Craniida, which provides most information on their biology. Living members of the class have shells which are composed of calcite, though some extinct forms my have aragonite shells. The shells are inarticulate (lack a hinge with distinct tooth-and-socket connections) and are usually rounded in outline. There is no pedicle, with the rear edge of the body cavity having the form of a smooth and flat wall perforated by the anus. (en)
- Craniforma is een klasse van de armpotigen (Brachiopoda) die al ontstond in het Cambrium en waarvan er nog steeds levende vertegenwoordigers bestaan. De naam Craniata wordt nu ook voor deze groep gebruikt, maar dit is verwarrend want Craniata is al de naam van de groep chordadieren die de onderstammen van de slijmprikken (Hyperotreti of Myxini) en de gewervelden (Vertebrata) omvat. (nl)
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| - Williams, Carlson, Brunton, Holmer & Popov, 1996 (en)
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| - Q18622360 (en)
- Q1951656 (en)
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| - Ordovician strophomenid brachiopod with encrusting craniid brachiopods . (en)
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| - Popov, Basset, Holmer & Laurie, 1993 (en)
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| - *Craniida
*†Craniopsida
*†Trimerellida (en)
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| - Craniata is a class of brachiopods originating in the Cambrian period and still extant today. It is the only class within the subphylum Craniiformea, one of three major subphyla of brachiopods alongside linguliforms and rhynchonelliforms. Craniata is divided into three orders: the extinct Craniopsida and Trimerellida, and the living Craniida, which provides most information on their biology. Living members of the class have shells which are composed of calcite, though some extinct forms my have aragonite shells. The shells are inarticulate (lack a hinge with distinct tooth-and-socket connections) and are usually rounded in outline. There is no pedicle, with the rear edge of the body cavity having the form of a smooth and flat wall perforated by the anus. This class of brachiopods has an unsupported lophophore with only a single row of tentacles. In the absence of a pedicle, the shell is usually attached directly to a hard substrate. Many craniiforms are encrusting animals which attach directly to the shell of another animal, usually another brachiopod. The plicae from the host brachiopod will then appear within the shell of the craniiform. Living craniiforms have a distinctive muscle system, which can be reconstructed from muscle scars in extinct forms as well. There are two pairs of column-like adductor muscles, which extend vertically and function to close the shell. There are also two pairs of oblique muscles, which lie at a shallow angle and help to slide and rotate the valves against each other. The internal oblique muscles are closely spaced, extending up and back from the middle of the ventral valve to the back of the dorsal valve. The lateral oblique muscles are widely spaced, extending forwards from the back of the ventral shell to the front of the soft body wall. Craniiforms share some similarities with both linguliforms and rhynchonelliforms, though they are distinct from either group. Like linguliforms, they have an anus, inarticulate shells, and a muscle system mainly based on adductor and oblique muscles. Like rhynchonelliforms, they have a calcareous shell and a modified lophophore. (en)
- Los craniformes (Craniiformea) son un subfilo de braquiópodos que se originaron en el período Cámbrico y aún existen en la actualidad. Tienen conchas calcíticas inarticuladas que son de contorno subcircular. Estos braquiópodos tiene un lofóforo no compatible y siempre están unidos a un sustrato duro en el registro fósil. Este sustrato duro suele ser otro braquiópodo. Las plicas del braquiópodo del huésped aparecerán dentro de la concha de los craniformes. La única clase dentro del subfilo Craniiformea es . La clase Craniata se divide en tres órdenes, uno de los cuales aún perdura. (es)
- Les Craniata sont une classe de brachiopodes connue depuis la fin du Cambrien il y a environ 500 Ma (millions d'années) et dont l'un des trois ordres qui lui sont rattachés, les , est représenté par des espèces encore vivantes. (fr)
- 크라니아강(Craniata, 이전에는 Craniforma)은 기원이 캄브리아기까지 거슬러 올라기며, 아직 일부 종이 현존하는 완족동물 강의 하나이다. 캄브리아기와 오르도비스기 동안에 아주 풍부했던 크라니아류는 해양 동물 속의 약 60%가 사라진 상태에서 대량 멸종으로 이어진 오르도비스기 후기 빙하기 이후 감소했다. (ko)
- Craniforma is een klasse van de armpotigen (Brachiopoda) die al ontstond in het Cambrium en waarvan er nog steeds levende vertegenwoordigers bestaan. De naam Craniata wordt nu ook voor deze groep gebruikt, maar dit is verwarrend want Craniata is al de naam van de groep chordadieren die de onderstammen van de slijmprikken (Hyperotreti of Myxini) en de gewervelden (Vertebrata) omvat. Ongeveer 20 soorten van deze 470 miljoen jaar oude afstammingslijn leven voort tot in het heden. Valdiviathyris quenstedti is een van deze soorten en daarvan is duidelijk dat het de laatste 35 miljoen jaar niet is veranderd. De evolutionaire aanpassingen die waarschijnlijk wel hebben plaatsgevonden betreffen in elk geval de aanpassing aan een koeler leefgebied. (nl)
- Craniata L. E. Popov, M. G. Bassett, and L. E. Holmer è l'unica classe del subphylum di brachiopodi Craniformea. In precedenza era nota come Craniforma Williams, Carlson, Brunton, Holmer & Popov, 1996 e questo nome rimane molto diffuso per evitare la confusione con il gruppo Craniata di cordati. Molto numerosi durante il Cambriano e l'Ordoviciano, i Craniforma sono diminuiti in numero in seguito al periodo di glaciazione della fine dell'Ordoviciano che portò ad un'estinzione di massa, con la scomparsa di circa il 60% dei generi di animali marini. (it)
- Craniata (лат.) — класс плеченогих, выделяемый в монотипный подтип Craniiformea. Ископаемые представители известны с позднего кембрия. Насчитывают около 20 современных видов. (ru)
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