Dianchicystis

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Dianchicystis
Temporal range: 541–513  Ma
Scientific classification
Kingdom:
Superphylum:
Phylum:
(unranked):
Family:
Genus:
Dianchicystis

Shu et al., 2004
Species:
D. jianshanensis

Shu et al., 2004
Binomial name
Dianchicystis jianshanensis
Shu et al., 2004

Dianchicystis is an extinct genus of vetulocystid deuterostome. It was found in Jianshan, near Haikou, Qiongzhusi Fm. (Cambrian from China). [1]

Contents

Phylogeny

Vetulocystidae

See also

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The palaeoscolecids are a group of extinct ecdysozoan worms resembling armoured priapulids. They are known from the Lower Cambrian to the lower Ludfordian ; they are mainly found as disarticulated sclerites, but are also preserved in many of the Cambrian lagerstätten. They take their name from the typifying genus Palaeoscolex. Other genera include Cricocosmia from the Lower Cambrian Chengjiang biota. Their taxonomic affinities within Ecdysozoa have been the subject of debate.

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Cotyledion tylodes is an extinct, stalked filter-feeder known from the Chengjiang lagerstatten. The living animal reached a couple of centimetres in height, and bore a loose scleritome of ovoid sclerites. Its interpretation has been controversial, and it has been previously identified as a carpoid echinoderm, or as a stem group echinoderm. C. tylodes is now classified as a stem group entoprocta based on new fossils that clearly show a U-shaped gut and a crown of tentacles.

<i>Serrodiscus</i>

Serrodiscus Richter and Richter 1941. is a genus of Eodiscinid trilobite belonging to the family Weymouthiidae Kobayashi T. (1943), Order Agnostida. It lived during the late Lower Cambrian, with remains found in Canada, China (Gansu), The United Kingdom (England), Germany (Silesia), Poland, the Russian Federation, and the United States. It is named for the spines on the ventral side of the pygidium, which give it a serrated impression.

Protohertzina is a genus of conodonts or, possibly, Chaetognaths, found at the beginning of the Cambrian explosion.

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References

  1. Sébastien Clausen; Xian-Guang Hou; Jan Bergström; Christina Franzén (2010). "The absence of echinoderms from the Lower Cambrian Chengjiang fauna of China: Palaeoecological and palaeogeographical implications". Palaeogeography, Palaeoclimatology, Palaeoecology. 294 (3): 133–141. Bibcode:2010PPP...294..133C. doi:10.1016/j.palaeo.2010.01.001.