Yohoia: Difference between revisions
Content deleted Content added
navbox |
Citation bot (talk | contribs) Removed proxy/dead URL that duplicated identifier. | Use this bot. Report bugs. | Suggested by Corvus florensis | #UCB_webform 401/2500 |
||
| (22 intermediate revisions by 12 users not shown) | |||
| Line 1: | Line 1: | ||
{{Short description|Extinct genus of arthropods}} |
{{Short description|Extinct genus of arthropods}} |
||
{{Automatic taxobox |
|||
{{Speciesbox |
|||
| image = 20191020 Yohoia tenuis.png |
| image = 20191020 Yohoia tenuis.png |
||
| image_caption = Life restoration of ''Y. tenuis'' |
|||
| image2 = 20210701 Yohoia tenuis great appendage mobility.gif |
|||
| image2_caption = The suggested movement of the great appendage of ''Y. tenuis'' |
|||
| fossil_range = {{fossil range|Middle Cambrian}} |
| fossil_range = {{fossil range|Middle Cambrian}} |
||
| display_parents = 4 |
|||
| ⚫ | |||
| grandparent_authority = Simonetta & Delle Cave, 1975 |
|||
| species = tenuis |
|||
| parent_authority = Henriksen, 1928 |
|||
| ⚫ | |||
| ⚫ | |||
| authority = [[Charles Doolittle Walcott|Walcott]], 1912 |
|||
| subdivision_ranks = Species |
|||
| subdivision = {{species list |
|||
| ⚫ | |||
|Y. utahana|Conway Morris ''et al.'', 2015<ref name=ConwayMorris2015>{{Cite journal |last1=Morris |first1=Simon Conway |last2=Selden |first2=Paul A. |last3=Gunther |first3=Glade |last4=Jamison |first4=Paul G. |last5=Robison |first5=Richard A. |date=2015 |title=New records of Burgess Shale-type taxa from the middle Cambrian of Utah |journal=Journal of Paleontology |language=en |volume=89 |issue=3 |pages=411–423 |doi=10.1017/jpa.2015.26 |bibcode=2015JPal...89..411C |s2cid=55050961 |issn=0022-3360|doi-access=free }}</ref>}} |
|||
}} |
}} |
||
'''''Yohoia''''' is |
'''''Yohoia''''' is an extinct genus of [[Megacheira|megacheiran]] arthropod from the [[Cambrian]] period that has been found as [[fossil]]s in the [[Burgess Shale]] formation of [[British Columbia]], Canada. The type species, ''Yohoia tenuis'', was described in 1912 by [[Charles Doolittle Walcott|Walcott]], who considered it an [[anostraca]]n crustacean. 711 specimens of ''Yohoia'' are known from the Greater [[Phyllopod bed]], where they comprise 1.35% of the community.<ref name=Caron2006>{{cite journal|last1=Caron |first1=Jean-Bernard|last2=Jackson |first2=Donald A.|title=Taphonomy of the Greater Phyllopod Bed community, Burgess Shale|journal=PALAIOS |volume=21 |issue=5 |pages=451–65|date=October 2006|doi=10.2110/palo.2003.P05-070R|jstor=20173022|bibcode=2006Palai..21..451C |s2cid=53646959 }}</ref> In 2015, [[Simon Conway Morris|Conway Morris]] ''et al.'' reported another species, ''Y. utahana'', from the [[Marjum Formation]], Utah.<ref name="ConwayMorris2015"/> |
||
== Description == |
|||
| ⚫ | ''Yohoia'' is one of the "[[great appendage]]" arthropods. All taxa have a single pair of large pre-oral jointed limbs with branched spiny ends for grasping, impaling, or filtering food items. "Great appendage" arthropods have been seen as a [[polyphyletic]] group where the appendage has independently evolved, or as a |
||
[[File:20210328 Yohoia tenuis great appendage.png|thumb|left|''Yohoia tenuis'' has two [[Polymorphism (biology)|morphotypes]],<ref>{{Cite journal |last1=Haug |first1=Joachim T. |last2=Waloszek |first2=Dieter |last3=Maas |first3=Andreas |last4=Liu |first4=Yu |last5=Haug |first5=Carolin |date=2012 |title=Functional morphology, ontogeny and evolution of mantis shrimp-like predators in the Cambrian: MANTIS SHRIMP-LIKE CAMBRIAN PREDATORS |journal=Palaeontology |language=en |volume=55 |issue=2 |pages=369–399 |doi=10.1111/j.1475-4983.2011.01124.x|s2cid=82841481 |doi-access=free }}</ref> a common feature seen in several arthropods of the Burgess Shale|310px]] |
|||
| ⚫ | Fossil specimens of ''Yohoia'' range in size from 7 to 23 mm, they have a head shield which is followed by 13 trunk [[tergites]], or plates. On both sides, the bottom side of the first 10 of these ended in backward-pointing, triangular points or projections. The last three plates were complete tubes, circling the entire trunk. At the end of the trunk was a paddle-like tail. There were also a pair of large extensions at the front of the head shield. They had a pronounced "elbow" and ended in four long spines, looking rather like fingers. There were three appendages on the bottom of the head shield on each side, and these are assumed to have supported the creature on the sandy or silty sea bottom. There were also single appendages hanging down under the body plates which were flap-like and fringed with setae, probably used for swimming and [[Respiration (physiology)|respiration]]. Specimens also show some bulbous formations at the front of the head shield that may have served as eyes.<ref>Briggs, Derek; Erwin, Douglas; Collier, Frederick. ''The Fossils of the Burgess Shale''. Smithsonian Books (1994).</ref> |
||
== Classification == |
|||
| ⚫ | |||
| ⚫ | ''Yohoia'' is one of the "[[great appendage]]" arthropods. All taxa have a single pair of large pre-oral jointed limbs with branched spiny ends for grasping, impaling, or filtering food items. "Great appendage" arthropods have been seen as a [[polyphyletic]] group where the appendage has independently evolved, or as a class [[Megacheira]] including ''Yohoia'' (with ''[[Leanchoilia]]'', ''[[Alalcomenaeus]]'', ''[[Oestokerkus]]'', ''[[Fortiforceps]]'', ''[[Jianfengia]]'', ''[[Yawunik]]'') defined as euarthropods, plus the [[Radiodonta|radiodonts]], defined as a sister group to arthropods. ''Yohoia-''like genera are small and have biramous limbs with a walking segment, while radiodonts are larger animals without limbs except for the great appendage. (Although biramous limbs have been described in the Devonian radiodont ''[[Schinderhannes bartelsi|Schinderhannes]]'',<ref>{{Cite journal|last1=Kühl|first1=Gabriele|last2=Briggs|first2=Derek E. G.|last3=Rust|first3=Jes|date=2009-02-06|title=A Great-Appendage Arthropod with a Radial Mouth from the Lower Devonian Hunsrück Slate, Germany|journal=Science|language=en|volume=323|issue=5915|pages=771–773|doi=10.1126/science.1166586|issn=0036-8075|pmid=19197061|bibcode=2009Sci...323..771K |s2cid=47555807 }}</ref> this interpretation is highly questioned and it is more likely to be bands of gill lamellae instead.<ref>{{Cite journal |last1=Moysiuk |first1=Joseph |last2=Caron |first2=Jean-Bernard |date=2022-07-08 |title=A three-eyed radiodont with fossilized neuroanatomy informs the origin of the arthropod head and segmentation |journal=Current Biology |volume=32 |issue=15 |pages=3302–3316.e2 |language=en |doi=10.1016/j.cub.2022.06.027 |pmid=35809569 |s2cid=250361698 |issn=0960-9822|doi-access=free }}</ref>) |
||
== Ecology == |
|||
''Yohoia'' is assumed to have been a mainly benthic (bottom-dwelling) creature that swam just above the muddy ocean floor, using its appendages to scavenge or capture prey. |
''Yohoia'' is assumed to have been a mainly benthic (bottom-dwelling) creature that swam just above the muddy ocean floor, using its appendages to scavenge or capture prey. |
||
== See also == |
|||
* [[Paleobiota of the Burgess Shale]] |
|||
==References== |
==References== |
||
| Line 25: | Line 42: | ||
{{Taxonbar|from=Q135578}} |
{{Taxonbar|from=Q135578}} |
||
[[Category:Burgess Shale fossils]] |
|||
[[Category:Megacheira]] |
|||
[[Category:Prehistoric arthropod genera]] |
[[Category:Prehistoric arthropod genera]] |
||
[[Category:Burgess Shale animals]] |
[[Category:Burgess Shale animals]] |
||
[[Category:Taxa named by Charles Doolittle Walcott]] |
|||
[[Category:Cambrian arthropods]] |
|||
[[Category:Cambrian genus extinctions]] |
|||
[[Category:Fossil taxa described in 1912]] |
|||
Latest revision as of 00:53, 6 September 2023
| Yohoia Temporal range:
| |
|---|---|
| |
| Life restoration of Y. tenuis | |
| |
| The suggested movement of the great appendage of Y. tenuis | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | †Megacheira |
| Clade: | †Cheiromorpha |
| Order: | †Yohoiida Simonetta & Delle Cave, 1975 |
| Family: | †Yohoiidae Henriksen, 1928 |
| Genus: | †Yohoia Walcott, 1912 |
| Species | |
| |
Yohoia is an extinct genus of megacheiran arthropod from the Cambrian period that has been found as fossils in the Burgess Shale formation of British Columbia, Canada. The type species, Yohoia tenuis, was described in 1912 by Walcott, who considered it an anostracan crustacean. 711 specimens of Yohoia are known from the Greater Phyllopod bed, where they comprise 1.35% of the community.[2] In 2015, Conway Morris et al. reported another species, Y. utahana, from the Marjum Formation, Utah.[1]
Description
[edit]
Fossil specimens of Yohoia range in size from 7 to 23 mm, they have a head shield which is followed by 13 trunk tergites, or plates. On both sides, the bottom side of the first 10 of these ended in backward-pointing, triangular points or projections. The last three plates were complete tubes, circling the entire trunk. At the end of the trunk was a paddle-like tail. There were also a pair of large extensions at the front of the head shield. They had a pronounced "elbow" and ended in four long spines, looking rather like fingers. There were three appendages on the bottom of the head shield on each side, and these are assumed to have supported the creature on the sandy or silty sea bottom. There were also single appendages hanging down under the body plates which were flap-like and fringed with setae, probably used for swimming and respiration. Specimens also show some bulbous formations at the front of the head shield that may have served as eyes.[4]
Classification
[edit]Yohoia is one of the "great appendage" arthropods. All taxa have a single pair of large pre-oral jointed limbs with branched spiny ends for grasping, impaling, or filtering food items. "Great appendage" arthropods have been seen as a polyphyletic group where the appendage has independently evolved, or as a class Megacheira including Yohoia (with Leanchoilia, Alalcomenaeus, Oestokerkus, Fortiforceps, Jianfengia, Yawunik) defined as euarthropods, plus the radiodonts, defined as a sister group to arthropods. Yohoia-like genera are small and have biramous limbs with a walking segment, while radiodonts are larger animals without limbs except for the great appendage. (Although biramous limbs have been described in the Devonian radiodont Schinderhannes,[5] this interpretation is highly questioned and it is more likely to be bands of gill lamellae instead.[6])
Ecology
[edit]Yohoia is assumed to have been a mainly benthic (bottom-dwelling) creature that swam just above the muddy ocean floor, using its appendages to scavenge or capture prey.
See also
[edit]References
[edit]- ^ a b Morris, Simon Conway; Selden, Paul A.; Gunther, Glade; Jamison, Paul G.; Robison, Richard A. (2015). "New records of Burgess Shale-type taxa from the middle Cambrian of Utah". Journal of Paleontology. 89 (3): 411–423. Bibcode:2015JPal...89..411C. doi:10.1017/jpa.2015.26. ISSN 0022-3360. S2CID 55050961.
- ^ Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS. 21 (5): 451–65. Bibcode:2006Palai..21..451C. doi:10.2110/palo.2003.P05-070R. JSTOR 20173022. S2CID 53646959.
- ^ Haug, Joachim T.; Waloszek, Dieter; Maas, Andreas; Liu, Yu; Haug, Carolin (2012). "Functional morphology, ontogeny and evolution of mantis shrimp-like predators in the Cambrian: MANTIS SHRIMP-LIKE CAMBRIAN PREDATORS". Palaeontology. 55 (2): 369–399. doi:10.1111/j.1475-4983.2011.01124.x. S2CID 82841481.
- ^ Briggs, Derek; Erwin, Douglas; Collier, Frederick. The Fossils of the Burgess Shale. Smithsonian Books (1994).
- ^ Kühl, Gabriele; Briggs, Derek E. G.; Rust, Jes (2009-02-06). "A Great-Appendage Arthropod with a Radial Mouth from the Lower Devonian Hunsrück Slate, Germany". Science. 323 (5915): 771–773. Bibcode:2009Sci...323..771K. doi:10.1126/science.1166586. ISSN 0036-8075. PMID 19197061. S2CID 47555807.
- ^ Moysiuk, Joseph; Caron, Jean-Bernard (2022-07-08). "A three-eyed radiodont with fossilized neuroanatomy informs the origin of the arthropod head and segmentation". Current Biology. 32 (15): 3302–3316.e2. doi:10.1016/j.cub.2022.06.027. ISSN 0960-9822. PMID 35809569. S2CID 250361698.
External links
[edit]- "Yohoia tenuis". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011. (Burgess Shale species 135)
| ||||||||||||||||||
|  | |||||||||||||||||