Olenoides was a trilobite from the Cambrian period. Its fossils are found well-preserved in the Burgess Shale in Canada. It grew up to 10 cm (3.9 in) long.
Olenoides
Temporal range: upper Middle to lower Upper Cambrian
Olenoides – from Olenus, in Greek mythology a man who, along with his wife Lethaea, was turned to stone. Olenus was used for a trilobite genus name in 1827; the suffix -oides(“resembling”) was added later.
DiscussionEdit
Olenoides followed the basic structure of all trilobites — a cephalon (head shield), a thorax with seven jointed parts, and finally a semicircular pygidium. Its antennae were long, and curved back along its sides. Its thin legs show that it was no swimmer, instead crawling along the sea floor in search of prey. This is also evidenced by fossil tracks that have been found. Conspicuous W-shaped wounds, often partially healed, on Olenoides specimens may be due to predation by Anomalocaris.[2]
Its major characteristics are a large parallel-sided glabella, deep interpleural furrows on the pygidium, and slender pygidial spines, as well as the fact that it is the most common limb-bearing trilobite species in the Burgess Shale.
213 specimens of Olenoides are known from the Greater Phyllopod bed, where they comprise 0.4% of the community.[4] The Burgess Shale's preservative qualities have helped Olenoides become one of the best known of trilobites.
SynonymsEdit
An exceptionally well preserved Olenoides serratus from the Burgess Shale. The antennae and legs are preserved as reflective carbon film
Olenoides was formerly known as Neolenus. Species of Kootenia are no longer considered different enough from those in Olenoides to warrant placement in a separate genus.[5]
SpeciesEdit
O. nevadensis
O. sassikaspa
O. serratus
O. dawsoni (formerly placed in Kootenia)
O. burgessensis (formerly placed in Kootenia)
O. buttsi (unrecognized)
O. convexus (unrecognized)
O. incertus (unrecognized)
O. pennsylvanicus (unrecognized)
DescriptionEdit
Olenoides is an average size trilobite (up to 9 cm long), broadly oval in outline. Its cephalon is semi-circular. The glabella is parallel-sided, rounded at its front and almost reaches the anterior border. Narrow occular ridges curve backwards from the front of the glabella to the small, outwardly-bowed eyes. The librigenae narrow backward into straight, slender genal spines that reach as far as the third thorax segment. Thorax consists of seven segments that end in needle-like spines. pygidium) has six axial rings that decrease in size backwards and four or five pairs of rearward pointing marginal spines. Cephalon, thorax and pygidium are of approximately equal length.[1]
Olenoides serratus is one of about twenty species of which the non-calcified parts are known, due to so-called soft tissue preservation. The antennae are the most anterior pair of appendages in trilobites. In O. serratus, these are attached about halfway the immediately adjacent to the hypostome, and appear from the dorsal side under the cephalon in front of the side of the glabella. They were flexible, having a tubular shape that became narrower towards anterior and composed of between 40 and 50 segments that are each shorter than wide. Olenellus serratus is the only known trilobite with cerci, uniramousappendages on ventral side of last pygidialsegment, and these are shaped like the antennas.[6]
^ abteam. "Olenoides serratus - The best-known trilobite from the Burgess Shale". The Burgess Shale. Royal Ontario Museum. {{cite web}}: External link in |author= (help)
^Coppold, Murray and Wayne Powell (2006). A Geoscience Guide to the Burgess Shale, p.60. The Burgess Shale Geoscience Foundation, Field, British Columbia. ISBN0-9780132-0-4.
^Paleobiology Database. "Chancia", accessed March 27, 2011
^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.
^Coppold, Murray and Wayne Powell (2006). A Geoscience Guide to the Burgess Shale, p.59. The Burgess Shale Geoscience Foundation, Field, British Columbia. ISBN0-9780132-0-4.
^Moore, R.C. (1959). Arthropoda I - Arthropoda General Features, Proarthropoda, Euarthropoda General Features, Trilobitomorpha. Treatise on Invertebrate Paleontology. Vol. Part O. Boulder, Colorado/Lawrence, Kansas: Geological Society of America/University of Kansas Press. pp. 1–560. ISBN0-8137-3015-5.
A fossil photograph of Olenoides nevadensis
Paleozoic Olenoides Yu-Gi-Oh!
External linksEdit
"Olenoides serratus". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011. Archived from the original on 2020-11-12.
This trilobite fossil is about 50 mm. long. It was found in the Marjum Formation in Utah. [Note - 25.4 mm=1 inch.]
olenoides, trilobite, from, cambrian, period, fossils, found, well, preserved, burgess, shale, canada, grew, long, temporal, range, upper, middle, lower, upper, cambrian, preꞒ, superbus, from, upper, marjum, formation3d, reconstruction, serratusscientific, cla. Olenoides was a trilobite from the Cambrian period Its fossils are found well preserved in the Burgess Shale in Canada It grew up to 10 cm 3 9 in long OlenoidesTemporal range upper Middle to lower Upper Cambrian PreꞒ Ꞓ O S D C P T J K Pg NOlenoides superbus from the Upper Marjum Formation3D reconstruction of Olenoides serratusScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ArthropodaClass TrilobitaOrder CorynexochidaFamily DorypygidaeGenus OlenoidesMeek 1877SpeciesO nevadensis Meek 1877 Type Paradoxides nevadensisO serratus Rominger 1887 Ogygia serrata Neolenus serratus Nathorstia transitans fresh post molting stage 1 Contents 1 Etymology 2 Discussion 3 Synonyms 4 Species 5 Description 6 See also 7 References 8 External linksEtymology EditOlenoides from Olenus in Greek mythology a man who along with his wife Lethaea was turned to stone Olenus was used for a trilobite genus name in 1827 the suffix oides resembling was added later Discussion EditOlenoides followed the basic structure of all trilobites a cephalon head shield a thorax with seven jointed parts and finally a semicircular pygidium Its antennae were long and curved back along its sides Its thin legs show that it was no swimmer instead crawling along the sea floor in search of prey This is also evidenced by fossil tracks that have been found Conspicuous W shaped wounds often partially healed on Olenoides specimens may be due to predation by Anomalocaris 2 Its major characteristics are a large parallel sided glabella deep interpleural furrows on the pygidium and slender pygidial spines as well as the fact that it is the most common limb bearing trilobite species in the Burgess Shale Specimens have been found in the Marjumian of the United States Utah and New York General Cambrian fossils have been found in Canada British Columbia and Newfoundland Greenland Kazakhstan Russia and the USA Idaho Nevada for which O nevadensis is named New York Pennsylvania for which O pennsylvanicus is named Virginia Utah and Wyoming 3 213 specimens of Olenoides are known from the Greater Phyllopod bed where they comprise 0 4 of the community 4 The Burgess Shale s preservative qualities have helped Olenoides become one of the best known of trilobites Synonyms Edit nbsp An exceptionally well preserved Olenoides serratus from the Burgess Shale The antennae and legs are preserved as reflective carbon filmOlenoides was formerly known as Neolenus Species of Kootenia are no longer considered different enough from those in Olenoides to warrant placement in a separate genus 5 Species EditO nevadensis O sassikaspa O serratus O dawsoni formerly placed in Kootenia O burgessensis formerly placed in Kootenia O buttsi unrecognized O convexus unrecognized O incertus unrecognized O pennsylvanicus unrecognized Description EditOlenoides is an average size trilobite up to 9 cm long broadly oval in outline Its cephalon is semi circular The glabella is parallel sided rounded at its front and almost reaches the anterior border Narrow occular ridges curve backwards from the front of the glabella to the small outwardly bowed eyes The librigenae narrow backward into straight slender genal spines that reach as far as the third thorax segment Thorax consists of seven segments that end in needle like spines pygidium has six axial rings that decrease in size backwards and four or five pairs of rearward pointing marginal spines Cephalon thorax and pygidium are of approximately equal length 1 Olenoides serratus is one of about twenty species of which the non calcified parts are known due to so called soft tissue preservation The antennae are the most anterior pair of appendages in trilobites In O serratus these are attached about halfway the immediately adjacent to the hypostome and appear from the dorsal side under the cephalon in front of the side of the glabella They were flexible having a tubular shape that became narrower towards anterior and composed of between 40 and 50 segments that are each shorter than wide Olenellus serratus is the only known trilobite with cerci uniramous appendages on ventral side of last pygidial segment and these are shaped like the antennas 6 See also EditPaleobiota of the Burgess ShaleReferences Edit a b team Olenoides serratus The best known trilobite from the Burgess Shale The Burgess Shale Royal Ontario Museum a href Template Cite web html title Template Cite web cite web a External link in code class cs1 code author code help Coppold Murray and Wayne Powell 2006 A Geoscience Guide to the Burgess Shale p 60 The Burgess Shale Geoscience Foundation Field British Columbia ISBN 0 9780132 0 4 Paleobiology Database Chancia accessed March 27 2011 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 Coppold Murray and Wayne Powell 2006 A Geoscience Guide to the Burgess Shale p 59 The Burgess Shale Geoscience Foundation Field British Columbia ISBN 0 9780132 0 4 Moore R C 1959 Arthropoda I Arthropoda General Features Proarthropoda Euarthropoda General Features Trilobitomorpha Treatise on Invertebrate Paleontology Vol Part O Boulder Colorado Lawrence Kansas Geological Society of America University of Kansas Press pp 1 560 ISBN 0 8137 3015 5 Olenoides on the Smithsonian institution website A fossil photograph of Olenoides nevadensis Paleozoic Olenoides Yu Gi Oh External links Edit Olenoides serratus Burgess Shale Fossil Gallery Virtual Museum of Canada 2011 Archived from the original on 2020 11 12 This trilobite fossil is about 50 mm long It was found in the Marjum Formation in Utah Note 25 4 mm 1 inch nbsp Paleontology portal Retrieved from https en wikipedia org w index php title Olenoides amp oldid 1159248974, wikipedia, wiki, book, books, library,
