Itagnostus elkedrensis occurs in the Middle Cambrian of Australia (Ptychagnostus praecurrens-zone, Xystridura templetonensis-zone, and Dinesus-stage, Elkedra; Triplagnostus gibbus-zone, Sandover Beds; both Northern Territory), the Russian Federation (Kounamkites-zone, Nekekit River; Liostracus allachjunensis-zone, Lena River).
Itagnostus comis is found in the Middle Cambrian of Australia (Triplagnostus gibbus-zone, Sandover Beds, Northern Territory).
Itagnostus gaspensis gaspensis is reported from the Middle Cambrian of the United States (Geddes Formation, Nevada; Ptychagnostus atavus-zone, Wheeler Formation, Drum Mountains, Utah), Canada (upper part, Grosses Roches, St. Laurence, Quebec), Russian Federation (Tomagnostus fissus-zone, Lena River).
Itagnostus gaspensis taitzuhoensis has been excavated from the Middle Cambrian of Antarctica (lower part, Shackleton Mountains), Australia (Ptychagnostus praecurrens-zone, Elkedra, Northern Territory), North-China (Bailiella-Lioparia-zone, Hsuchang Formation).
Itagnostus interstrictus interstrictus is present in the Middle Cambrian of Canada (Ptychagnostus punctuosus-zone, Cow head Group, Newfoundland), the United States (Bolaspidella (P. atavus)-zone, Tatonduk River, Hillard Peak, Alaska; lower part of the Bolaspidella-zone, Western-Utah; Wheeler Shale, Antelope Spring, House Range, Utah), the Russian Federation (Malokuonamsky Horizon, Tomagnostus fissus-zone, and Liostracus allachjunensis-zone, all Lena River).
Itagnostus krusei is found in the Middle Cambrian of the Russian Federation (Kounamkites-zone, Lena River).
Itagnostus oepiki has been collected in the Middle Cambrian of Australia (Triplagnostus gibbus-zone, Sandover Beds; Xystridura templetonensis-zone, Elkedra; both Northern Territory).
Itagnostus walleyae is reported from the Middle Cambrian of Australia (Ptychagnostus praecurrens-zone, Elkedra, Northern Territory).
Itagnostus sp. has been collected in the Middle Cambrian of the Russian Federation (Liosttracus allachjunensis-zone, Lena River).[1]
Schematic showing the relationship between Itagnostus (light green) with other Peronopsid genera (darker green). The descending genus Euagnostus (Dorypygidae) is shown in blue-purple
References
^ abcNaimark, E.B. (2012). "Hundred species of the Genus Peronopsis Hawle et Corda, 1847". Paleontological Journal. 46 (9): 945–1057. doi:10.1134/S0031030112090018. S2CID 85130465.
itagnostus, genus, trilobite, restricted, middle, cambrian, remains, have, been, found, asia, australia, europe, north, america, temporal, range, earliest, mayan, earliest, batyrbayan, preꞒ, interstrictus, until, recently, known, peronopsis, interstricta, from. Itagnostus is a genus of trilobite restricted to the Middle Cambrian Its remains have been found in Asia Australia Europe and North America 1 ItagnostusTemporal range earliest Mayan to earliest Batyrbayan PreꞒ Ꞓ O S D C P T J K Pg NItagnostus interstrictus until recently known as Peronopsis interstricta from the Wheeler Shale UtahScientific classificationKingdom AnimaliaPhylum ArthropodaClass TrilobitaOrder AgnostidaFamily PeronopsidaeGenus ItagnostusOpik 1979species 1 I elkedrensis Etheridge 1902 type I comis Opik 1979 I doylei Laurie 2006 I gaspensis Rasetti 1948 ssp gaspensis ssp taitzuhoensis Lu 1957 dd I interstrictus White 1874 synonyms Euagnostus levifrons Peronopsis interstrictassp interstrictus ssp robustus Deiss 1939 synonym Agnostus robustus dd I krusei Laurie 2006 I oepiki Laurie 2004 I subhastatus Geyer amp Peel 2017 I walleyae Laurie 2006 Distribution EditItagnostus elkedrensis occurs in the Middle Cambrian of Australia Ptychagnostus praecurrens zone Xystridura templetonensis zone and Dinesus stage Elkedra Triplagnostus gibbus zone Sandover Beds both Northern Territory the Russian Federation Kounamkites zone Nekekit River Liostracus allachjunensis zone Lena River Itagnostus comis is found in the Middle Cambrian of Australia Triplagnostus gibbus zone Sandover Beds Northern Territory Itagnostus gaspensis gaspensis is reported from the Middle Cambrian of the United States Geddes Formation Nevada Ptychagnostus atavus zone Wheeler Formation Drum Mountains Utah Canada upper part Grosses Roches St Laurence Quebec Russian Federation Tomagnostus fissus zone Lena River Itagnostus gaspensis taitzuhoensis has been excavated from the Middle Cambrian of Antarctica lower part Shackleton Mountains Australia Ptychagnostus praecurrens zone Elkedra Northern Territory North China Bailiella Lioparia zone Hsuchang Formation Itagnostus interstrictus interstrictus is present in the Middle Cambrian of Canada Ptychagnostus punctuosus zone Cow head Group Newfoundland the United States Bolaspidella P atavus zone Tatonduk River Hillard Peak Alaska lower part of the Bolaspidella zone Western Utah Wheeler Shale Antelope Spring House Range Utah the Russian Federation Malokuonamsky Horizon Tomagnostus fissus zone and Liostracus allachjunensis zone all Lena River Itagnostus krusei is found in the Middle Cambrian of the Russian Federation Kounamkites zone Lena River Itagnostus oepiki has been collected in the Middle Cambrian of Australia Triplagnostus gibbus zone Sandover Beds Xystridura templetonensis zone Elkedra both Northern Territory Itagnostus walleyae is reported from the Middle Cambrian of Australia Ptychagnostus praecurrens zone Elkedra Northern Territory Itagnostus sp has been collected in the Middle Cambrian of the Russian Federation Liosttracus allachjunensis zone Lena River 1 Schematic showing the relationship between Itagnostus light green with other Peronopsid genera darker green The descending genus Euagnostus Dorypygidae is shown in blue purpleReferences Edit a b c Naimark E B 2012 Hundred species of the Genus Peronopsis Hawle et Corda 1847 Paleontological Journal 46 9 945 1057 doi 10 1134 S0031030112090018 S2CID 85130465 External links EditPeronopsis in the Paleobiology Database Peronopsis at the Field Museum s Evolving Planet Retrieved from https en wikipedia org w index php title Itagnostus amp oldid 1103976222, wikipedia, wiki, book, books, library,
