O. haimantensis occurs in the Middle Cambrian of India (upper part of the Parahio Formation, left bank of the Parahio/Barachu river, above the Moopa camping ground, Spiti).[3]
Ecologyedit
Fossils of Olenus are commonly found in dark mudstones, which were deposited on the seafloor in environments with low oxygen levels. The very wide side lobes (or pleurae) are thought to have shielded extended gills, which would have helped the animal absorb the maximum amount of oxygen possible in such an environment. Evidence also suggests that Olenus and its relatives may have developed a symbiotic relationship with sulfate-reducing bacteria, either by feeding on them or by absorbing nutrients directly from them.
Size: Up to 1.5 in (4 cm) long. It had up to 15 thoracic segments, with a narrow axis and wide pleurae.
Referencesedit
^Hwang, H.-A.; Choi, D.K. (2005). "Heterochrony of the Late Cambrian olenid trilobites from the Machari Formation, Yeongwol, Korea: implications for biostratigraphy and intercontinental correlation". Geosciences Journal. 9 (2): 215–222. Bibcode:2005GescJ...9..215H. doi:10.1007/bf02910580. S2CID 140659760.
^Poulsen, C. (1956). . Bulletin of Zoological Nomenclature. 12 (1). Archived from the original on 2014-01-11. Retrieved 2014-01-11.
^ abShah, S.K.; Parcha, S.K.; Raina, A.K. (1991). "Late Cambrian trilobites from Himalaya" (PDF). Journal of the Palaeontological Society of India. 36: 89–107.
^Bodil Wesenberg Lauridsen & Arne Thorshøj Nielsen (2005). "The Upper Cambrian trilobite Olenus at Andarum, Sweden: a case of iterative evolution?". Palaeontology. 48 (5): 1041–1056. Bibcode:2005Palgy..48.1041L. doi:10.1111/j.1475-4983.2005.00499.x.
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olenus, trilobite, olenus, genus, upper, cambrian, ptychopariid, trilobite, olenustemporal, range, preꞒ, upper, cambrianolenus, micrurus, from, trawsfynydd, wales, right, free, cheek, displaced, left, turned, pygidium, missingscientific, classificationkingdom,. Olenus is a genus of Upper Cambrian ptychopariid trilobite 4 OlenusTemporal range 498 5 488 3 Ma PreꞒ Ꞓ O S D C P T J K Pg N Upper CambrianOlenus micrurus from Trawsfynydd N Wales right free cheek displaced to left and turned 150 pygidium missingScientific classificationKingdom AnimaliaPhylum ArthropodaClass TrilobitaOrder PtychopariidaFamily OlenidaeGenus OlenusDalman 1827 1 non Dejean 1835 nomen nudum ex Thomson 1857 Trycherus a beetle 2 SpeciesO gibbosus Wahlenberg 1821 type synonym Entomostracites gibbosus O alpha Henningsmoen 1957 O altaicus Ivshin 1962 O apoxysomatus Jell et al 1991 O asiaticus Kobayashi 1944 O attenuatus Boeck 1838 O austriacus Yang in Zhou et al 1977 O cataractes Salter 1864 O delicatus Opik 1963 O dentatus Westergard 1922 O guizhouensis Lu and Chien in Yin and Li 1978 O haimantensis Reed 1910 synonym Hundwarella haimantensis 3 O henningsmoeni Ahlgren and Ahlberg 1996 O micrurus Salter 1849 O mundus Lake 1908 O ogilviei Opik 1963 O proximus Lazarenko 1966 O rotundatus Westergard 1922 O scanicus Westergard 1922 O sinensis Lu 1964 O solitarius Westergard 1922 O transverses Westergard 1922 O truncatus Brunnich 1781 O veles Rushton 1983 O wahlenbergi Westergard 1922 Contents 1 Distribution 2 Ecology 3 Taxonomy 3 1 Species previously assigned to Olenus 3 2 Species that may be confused with Olenus 4 Description 5 ReferencesDistribution editOlenus can be found in the British Isles India Norway Sweden Denmark Newfoundland Texas South Korea and Australia O haimantensis occurs in the Middle Cambrian of India upper part of the Parahio Formation left bank of the Parahio Barachu river above the Moopa camping ground Spiti 3 Ecology editFossils of Olenus are commonly found in dark mudstones which were deposited on the seafloor in environments with low oxygen levels The very wide side lobes or pleurae are thought to have shielded extended gills which would have helped the animal absorb the maximum amount of oxygen possible in such an environment Evidence also suggests that Olenus and its relatives may have developed a symbiotic relationship with sulfate reducing bacteria either by feeding on them or by absorbing nutrients directly from them Taxonomy editSpecies previously assigned to Olenus edit O forficula Ceratopyge forficula O pecten Ctenopyge pecten O punctatus Asteropyge punctata O thompsoni Olenellus thompsoni O zoppii Dolerolenus zoppiiSpecies that may be confused with Olenus edit The bug Anchodelphax olenus The extant beetle Olenecamptus olenus The fossil waterbeetle Limnoxenus olenus The ant Polyrhachis olenus permanent dead link The ladyslipper orchid Paphiopedilum Olenus Description editSize Up to 1 5 in 4 cm long It had up to 15 thoracic segments with a narrow axis and wide pleurae References edit Hwang H A Choi D K 2005 Heterochrony of the Late Cambrian olenid trilobites from the Machari Formation Yeongwol Korea implications for biostratigraphy and intercontinental correlation Geosciences Journal 9 2 215 222 Bibcode 2005GescJ 9 215H doi 10 1007 bf02910580 S2CID 140659760 Poulsen C 1956 Proposed use of the Plenary Powers to secure the availability of the generic names Olenus Dalman 1827 and Paradoxides Brogniard 1822 Class Trilobita for use in the sense in which these names are customarily employed Bulletin of Zoological Nomenclature 12 1 Archived from the original on 2014 01 11 Retrieved 2014 01 11 a b Shah S K Parcha S K Raina A K 1991 Late Cambrian trilobites from Himalaya PDF Journal of the Palaeontological Society of India 36 89 107 Bodil Wesenberg Lauridsen amp Arne Thorshoj Nielsen 2005 The Upper Cambrian trilobite Olenus at Andarum Sweden a case of iterative evolution Palaeontology 48 5 1041 1056 Bibcode 2005Palgy 48 1041L doi 10 1111 j 1475 4983 2005 00499 x nbsp This Ptychopariida related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Olenus trilobite amp oldid 1193906989, wikipedia, wiki, book, books, library,
