| Revision as of 20:33, 27 February 2023 edit2001:1c01:2b04:7800:e528:5e11:464:4e5f (talk) Changed “Dollocaris was is” to only “is”.Tags: Mobile edit Mobile web edit← Previous edit | Revision as of 21:19, 14 December 2023 edit undoRandomRatplay (talk | contribs)37 editsNo edit summaryTags: Reverted Visual editNext edit → | ||
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| ==Description== | ==Description== | ||
| Adult specimens of ''Dollocaris'' measured over {{convert|30|cm|in|abbr=on}} in length.<ref>{{Cite journal |last=Charbonnier |first=Sylvain |last2=Vannier |first2=Jean |last3=Hantzpergue |first3=Pierre |last4=Gaillard |first4=Christian |date=2010 |title=Ecological Significance of the Arthropod Fauna from the Jurassic (Callovian) La Voulte Lagerstätte |url=http://www.app.pan.pl/article/item/app20090036.html |journal=Acta Palaeontologica Polonica |language=en |volume=55 |issue=1 |pages=111–132 |doi=10.4202/app.2009.0036 |issn=0567-7920|doi-access=free }}</ref> It sported a row of small appendages to assist in swimming, as well as three pairs of clawed segmented legs,<ref>{{Cite web|url=https://phys.org/news/2016-01-extinct-crustacean-dollocaris-eyes.html|title=Extinct crustacean Dollocaris was all eyes|website=phys.org}}</ref> but it was probably a poor swimmer, instead depending on ] to hunt prey. It is known for its well-preserved, large ], sporting well-preserved individual retinula cells, which assisted in catching prey.<ref>{{Cite web|url=http://www.eartharchives.org/articles/extinct-crustacean-dollocaris-was-all-eyes/|title=All eyes on me: Jurassic crustacean had largest peepers|website=Earth Archives}}</ref><ref>{{Cite journal|url= |title=Exceptional preservation of eye structure in arthropod visual predators from the Middle Jurassic|first1=Jean|last1=Vannier|first2=Brigitte|last2=Schoenemann|first3=Thomas|last3=Gillot|first4=Sylvain|last4=Charbonnier|first5=Euan|last5=Clarkson|date=January 19, 2016|journal=Nature Communications|volume=7|issue=1|pages=10320|via=www.nature.com|doi=10.1038/ncomms10320|pmid=26785293|pmc=4735654}}</ref> | Adult specimens of ''Dollocaris'' measured over {{convert|30|cm|in|abbr=on}} in length.<ref>{{Cite journal |last=Charbonnier |first=Sylvain |last2=Vannier |first2=Jean |last3=Hantzpergue |first3=Pierre |last4=Gaillard |first4=Christian |date=2010 |title=Ecological Significance of the Arthropod Fauna from the Jurassic (Callovian) La Voulte Lagerstätte |url=http://www.app.pan.pl/article/item/app20090036.html |journal=Acta Palaeontologica Polonica |language=en |volume=55 |issue=1 |pages=111–132 |doi=10.4202/app.2009.0036 |issn=0567-7920|doi-access=free }}</ref> It sported a row of small appendages to assist in swimming, as well as three pairs of clawed segmented legs,<ref>{{Cite web|url=https://phys.org/news/2016-01-extinct-crustacean-dollocaris-eyes.html|title=Extinct crustacean Dollocaris was all eyes|website=phys.org}}</ref> but it was probably a poor swimmer, instead depending on ] to hunt prey. It is known for its well-preserved, large ], sporting well-preserved individual , which assisted in catching prey.<ref>{{Cite web|url=http://www.eartharchives.org/articles/extinct-crustacean-dollocaris-was-all-eyes/|title=All eyes on me: Jurassic crustacean had largest peepers|website=Earth Archives}}</ref><ref>{{Cite journal|url= |title=Exceptional preservation of eye structure in arthropod visual predators from the Middle Jurassic|first1=Jean|last1=Vannier|first2=Brigitte|last2=Schoenemann|first3=Thomas|last3=Gillot|first4=Sylvain|last4=Charbonnier|first5=Euan|last5=Clarkson|date=January 19, 2016|journal=Nature Communications|volume=7|issue=1|pages=10320|via=www.nature.com|doi=10.1038/ncomms10320|pmid=26785293|pmc=4735654}}</ref> | ||
| Dollocaris was a swimming animal that used a set of tiny beating legs for propulsion. It was however, not a strong swimmer and was likely an ambush predator that hunted in murkier waters, hidden among rocky reefs. It was roughly 20 centimeters long in maximum length, similar to most large ] today. It certainly had a shell, and while it looked like a prawn or ] it was not. It was only a distant relative of ] called a ]. These animals have an incredibly long history in the fossil record, spanning a record 400 million years. They died out when the ] ended. Even among such alien-looking animals Dollocaris is certainly one of the stranger members of its family. | |||
| Dollocaris hails from the ] of ], specifically ]. Its fossils have been found in rocks roughly 163 million years old. The excellent preservation of smaller marine animals of the time makes this locality unique. These include some of the earliest ] and some wonderfully preserved ], as well as ], shrimp and ]. All in all it was an environment low in oxygen, situated in a shallow seabed, an area of soft sand and mud. The unique conditions of the area allowed the fossilization of soft-bodied animals which might ordinarily decay quite rapidly. | |||
| ] | ] | ||
Revision as of 21:19, 14 December 2023
Extinct genus of crustaceans
| Dollocaris Temporal range: Jurassic PreꞒ Ꞓ O S D C P T J K Pg N ↓ | |
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| Reconstruction of Dollocaris ingens | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Crustacea |
| Class: | †Thylacocephala |
| Order: | †Concavicarida |
| Family: | Dollocarididae |
| Genus: | †Dollocaris |
| Species: | D. ingens |
| Binomial name | |
| Dollocaris ingens (van Straelen, 1923) | |
Dollocaris is an extinct genus of thylacocephalan that lived during the Jurassic period. Fossils have been found in France, specifically the La Voulte-sur-Rhône lagerstätte. It is known for its massive compound eyes, giving Dollocaris a rather characteristic appearance. One species is currently known, D. ingens.
Description
Adult specimens of Dollocaris measured over 30 cm (12 in) in length. It sported a row of small appendages to assist in swimming, as well as three pairs of clawed segmented legs, but it was probably a poor swimmer, instead depending on ambush to hunt prey. It is known for its well-preserved, large compound eyes, sporting well-preserved individual retinula cells, which assisted in catching prey.
Dollocaris was a swimming animal that used a set of tiny beating legs for propulsion. It was however, not a strong swimmer and was likely an ambush predator that hunted in murkier waters, hidden among rocky reefs. It was roughly 20 centimeters long in maximum length, similar to most large prawns today. It certainly had a shell, and while it looked like a prawn or shrimp it was not. It was only a distant relative of crustaceans called a thylacocephalan. These animals have an incredibly long history in the fossil record, spanning a record 400 million years. They died out when the Mesozoic Era ended. Even among such alien-looking animals Dollocaris is certainly one of the stranger members of its family.
Dollocaris hails from the Middle Jurassic of France, specifically La Voulte-sur-Rhone. Its fossils have been found in rocks roughly 163 million years old. The excellent preservation of smaller marine animals of the time makes this locality unique. These include some of the earliest octopuses and some wonderfully preserved squid, as well as clams, shrimp and brittle stars. All in all it was an environment low in oxygen, situated in a shallow seabed, an area of soft sand and mud. The unique conditions of the area allowed the fossilization of soft-bodied animals which might ordinarily decay quite rapidly.
References
- ^ "Fossil specimen - Dollocaris ingens VAN STRAELEN, 1923". science.mnhn.fr.
- Charbonnier, Sylvain; Vannier, Jean; Hantzpergue, Pierre; Gaillard, Christian (2010). "Ecological Significance of the Arthropod Fauna from the Jurassic (Callovian) La Voulte Lagerstätte". Acta Palaeontologica Polonica. 55 (1): 111–132. doi:10.4202/app.2009.0036. ISSN 0567-7920.
- "Extinct crustacean Dollocaris was all eyes". phys.org.
- "All eyes on me: Jurassic crustacean had largest peepers". Earth Archives.
- Vannier, Jean; Schoenemann, Brigitte; Gillot, Thomas; Charbonnier, Sylvain; Clarkson, Euan (January 19, 2016). "Exceptional preservation of eye structure in arthropod visual predators from the Middle Jurassic". Nature Communications. 7 (1): 10320. doi:10.1038/ncomms10320. PMC 4735654. PMID 26785293 – via www.nature.com.
| Taxon identifiers | |
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| Dollocaris | |
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