Sinoascus Paillatus
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''Sinoascus paillatus'' is an extinct species of
stem-group In phylogenetics, the crown group or crown assemblage is a collection of species composed of the living representatives of the collection, the most recent common ancestor of the collection, and all descendants of the most recent common ancestor. ...
ctenophore Ctenophora (; : ctenophore ) is a phylum of marine invertebrates, commonly known as comb jellies, that inhabit sea waters worldwide. They are notable for the groups of cilia they use for swimming (commonly referred to as "combs"), and they ar ...
, known from the
Maotianshan shales The Maotianshan Shales () are a series of Early Cambrian sedimentary deposits in the Chiungchussu Formation or Heilinpu Formation, famous for their '' Konservat Lagerstätten'', deposits known for the exceptional preservation of fossilized orga ...
of
Yunnan Yunnan; is an inland Provinces of China, province in Southwestern China. The province spans approximately and has a population of 47.2 million (as of 2020). The capital of the province is Kunming. The province borders the Chinese provinces ...
, China. It is dated to
Cambrian Stage 3 Cambrian Stage 3 is the still unnamed third stage of the Cambrian. It succeeds Cambrian Stage 2 and precedes Cambrian Stage 4, although neither its base nor top have been formally defined. The plan is for its lower boundary to correspond approxima ...
and belongs to late Early
Cambrian The Cambrian ( ) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma (million years ago) to the beginning of the Ordov ...
strata. Fossil specimens are poorly preserved, providing little details, if any at all, about the anatomy of the comb rows.


See also


Burgess shale ctenophores

*'' Fasciculus vesanus'' *''
Ctenorhabdotus capulus ''Ctenorhabdotus capulus'' is an extinct species of ctenophore (or comb jelly), known from the Burgess shale in British Columbia, Canada. It is approximately 515 to 505 million years old and was equipped with 24 comb rows, three times as many as ...
'' *'' Xanioascus canadensis''


Maotianshan shales ctenophores

*'' Maotianoascus octonarius'' *''
Daihua sanqiong ''Daihua sanqiong'' is a possible ancestor of comb jellies. It was a sessile relative to comb jellies. It had combs with cilia just like modern day comb jellies. It is named after the Dai people. The name means Dai flower. In 2019, ''Daihua'' a ...
''


References

Maotianshan shales fossils Monotypic prehistoric ctenophore genera {{Ctenophore-stub