''Fasciculus vesanus'' is an
extinct
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...
species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...
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. ...
ctenophores
Ctenophora (; : ctenophore ) is a phylum of marine invertebrates, commonly known as comb jellies, that marine habitats, inhabit sea waters worldwide. They are notable for the groups of cilia they use for swimming (commonly referred to as "combs ...
known from the
Burgess Shale
The Burgess Shale is a fossil-bearing deposit exposed in the Canadian Rockies of British Columbia, Canada. It is famous for the exceptional preservation of the soft parts of its fossils. At old (middle Cambrian), it is one of the earliest fos ...
of
British Columbia
British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...
, Canada. It is dated to and belongs to middle
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.
The species is remarkable for its two sets of long and short comb rows, not seen in similar form elsewhere in the
fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserve ...
record or among modern species.
See also
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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 ...
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Xanioascus canadensis
''Xanioascus canadensis'' is an extinct ctenophore, known from the Burgess Shale in British Columbia, Canada. The species, which is about 515 to 505 million years old, had 24 comb rows - in contrast to all modern forms which have only 8.
Other ...
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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 ...
ctenophores
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Maotianoascus octonarius
''Maotianoascus octonarius'' is an extinct species of stem-group ctenophore, known from the Chinese Maotianshan shales of Yunnan. It is dated to Cambrian Stage 3 and belongs to late Early Cambrian strata.
The species is remarkable for its set of ...
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Sinoascus paillatus
''Sinoascus paillatus'' is an extinct species of stem-group ctenophore, known from the Maotianshan shales of Yunnan, China. It is dated to Cambrian Stage 3 and belongs to late Early Cambrian strata.
Fossil specimens are poorly preserved, providi ...
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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 ...
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Xianguangia sinica
''Xianguangia'' is a soft-bodied sea anemone-like fossil animal from the Chengjiang Biota of China.
Description
''Xianguangia sinica'' has a cylindrical body with a whorl of nearly 16 tentacles around the oral disc, similar to the modern anthozo ...
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References
External links
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Monotypic prehistoric ctenophore genera
Burgess Shale animals
Fossil taxa described in 1978
Cambrian genus extinctions
{{Ctenophore-stub