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- Die Chancelloriidae (seltener auch Chancelloridae geschrieben) sind eine ausgestorbene Familie des Tierreichs (von späteren Autoren teilweise auch im Rang einer Ordnung geführt), die in Sedimenten des Unterkambriums erstmals auftreten und bis ins frühe Oberkambrium verbreitet waren. Ihre taxonomische Zuordnung ist schwierig, sie könnten aber in die Nähe von Schwämmen gerückt werden. Auch mit den Halkieriidae bestehen Gemeinsamkeiten in der Form der Skelettnadeln. (de)
- The Chancelloriids are an extinct family of superficially sponge-like animals common in sediments from the Early Cambrian to the early Late Cambrian. Many of these fossils consists only of spines and other fragments, and it is not certain that they belong to the same type of organism. Other specimens appear to be more complete and to represent sessile, radially symmetrical hollow bag-like organisms with a soft skin armored with star-shaped calcareous sclerites from which radiate sharp spines. Classifying the chancelloriids is difficult. Some paleontologists classify them as sponges, an idea which chancelloriids' sessile lifestyle and simple structure make plausible. Other proposals suggest that they were more advanced, or at least originated from more advanced ancestors; for example chancelloriids' skins appear to be much more complex than those of any sponge. It has been suggested that chancelloriids were related to the "chain mail" armored slug-like halkieriids, which are typically considered to be stem-group molluscs. While the sclerites of the two groups are very similar right down to the microscopic level, the large dissimilarity in the body plans of the two groups is difficult to reconcile with this hypothesis. The proposed clade containing the two groups, "Coeloscleritophora", is generally not thought to be monophyletic. Recent research has suggested that chancellorids represent an independent group of basal eumetazoans. (en)
- Chancelloriidae é uma família de animais fósseis do período Cambriano de posição taxonômica incerta. Foram descritos pela primeira vez em 1920 por Charles Doolittle Walcott que os considerou como um grupo primitivo de esponjas. Restos fósseis da família foram encontrados no Canadá, Estados Unidos, Rússia, China, Austrália, Espanha, Marrocos e Antártida. Gêneros reconhecidos:
* Jiang in Luo et al., 1982
* ? He & Xie, 1989
* Walcott, 1920 [=Fangxianites Duan, 1984; =Actinoites Duan, 1984; =?Monospinites Sayutina in Vassiljeva et Sayutina, 1988; =Stellaria Vassiljeva, 1985; =Stellispinella Vassiljeva in Vassiljeva et Sayutina, 1993]
* Doré & Reid, 1965 [=Dimidia Jiang in Luo et al., 1982; =Onychia Jiang in Luo et al., 1982; =Rosella Vassiljeva in Vassiljeva et Sayutina, 1988; =Zhurinia Missarzhevsky, 1989]
* Sdzuy, 1969 [=Aldania Vassiljeva, 1985]
* Vassiljeva, 1985
* Vassiljeva in Vassiljeva et Sayutina, 1988
* Missarzhevsky, 1989
* Bengtson & Conway Morris in Bengtson et al., 1990
* Demidenko, 2000
* Demidenko in Gravestock et al., 2001 (pt)
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| rdfs:comment
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- Die Chancelloriidae (seltener auch Chancelloridae geschrieben) sind eine ausgestorbene Familie des Tierreichs (von späteren Autoren teilweise auch im Rang einer Ordnung geführt), die in Sedimenten des Unterkambriums erstmals auftreten und bis ins frühe Oberkambrium verbreitet waren. Ihre taxonomische Zuordnung ist schwierig, sie könnten aber in die Nähe von Schwämmen gerückt werden. Auch mit den Halkieriidae bestehen Gemeinsamkeiten in der Form der Skelettnadeln. (de)
- The Chancelloriids are an extinct family of superficially sponge-like animals common in sediments from the Early Cambrian to the early Late Cambrian. Many of these fossils consists only of spines and other fragments, and it is not certain that they belong to the same type of organism. Other specimens appear to be more complete and to represent sessile, radially symmetrical hollow bag-like organisms with a soft skin armored with star-shaped calcareous sclerites from which radiate sharp spines. (en)
- Chancelloriidae é uma família de animais fósseis do período Cambriano de posição taxonômica incerta. Foram descritos pela primeira vez em 1920 por Charles Doolittle Walcott que os considerou como um grupo primitivo de esponjas. Restos fósseis da família foram encontrados no Canadá, Estados Unidos, Rússia, China, Austrália, Espanha, Marrocos e Antártida. Gêneros reconhecidos: (pt)
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