Neoagnostus Kobayashi 1955
- 1. Department of Geography, Geology, Environment and Planning, Indiana University of Pennsylvania, Indiana, Pennsylvania 15705. jftaylor @ iup. edu; https: // orcid. org / 0000 - 0003 - 0162 - 0087
- 2. Department of Physical Sciences, University of Central Missouri, Warrensburg, Missouri, 64093 loch @ ucmo. edu; https: // orcid. org / 0000 - 0003 - 4468 - 3512
- 3. Department of Geography, Geology, Environment and Planning, Indiana University of Pennsylvania, Indiana, Pennsylvania 15705. jftaylor @ iup. edu; https: // orcid. org / 0000 - 0003 - 0162 - 0087 & U. S. Geological Survey, MS 926 A, National Center, Reston, Virginia 20192. jrepetski @ usgs. gov; https: // orcid. org / 0000 - 0002 - 2298 - 7120 & Department of Geography, Geology, Environment and Planning, Indiana University of Pennsylvania, Indiana, Pennsylvania 15705. jftaylor @ iup. edu; https: // orcid. org / 0000 - 0003 - 0162 - 0087
Description
Neoagnostus Kobayashi, 1955
Type species. Neoagnostus aspidoides Kobayashi, 1955, by original designation, from the McKay Group, British Columbia, Canada.
Diagnosis. The diagnosis of Naimark (2016, p. 61–62) that features a “V-shaped” F3 and chevron-shaped F2 glabellar furrows and pygidial axial furrows which fail to surround the posteroaxis, and a pair of inflated nodes located posterior to F2 is accepted.
Other species. N. bilobus (Shaw, 1951); N. longicolis Kobayashi, 1966; N. eckardti Jell, 1985; N. hangulensis Lu & Zhou, in Lu et al., 1981; N. shiziluensis Lu and Zhou, 1990; N. tarjensis (Gilberto, 2010); N. parki n. sp.
Discussion. Shergold(1975, 1977) considered Neoagnostus a subjective junior synonym of Pseudorhaptagnostus Lermontova, 1951, which he treated sensu lato. He described a “spectaculate” morphology in which the glabellar node lies posterior to the F2 glabellar furrow which he subdivided into multiple species groups. Among these “spectaculate” forms he included a “ Bilobus group ” that he acknowledged may have represented a genus-level grouping and which included Neoagnostus aspidoides, the type species of Neoagnostus. Shergold (1980) then provisionally recognized Neoagnostus as a valid genus. Shergold et al. (1990; Shergold & Laurie, 1997) sought to establish subgenera for Neoagnostus, a practice followed by some authors (Nielson, 1997). Naimark (2016) briefly discussed the nomenclatorial history of Pseudorhaptagnostus and revived the generic status of Neoagnostus without subgenera.
Notes
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Linked records
Additional details
Identifiers
Related works
- Is part of
- Journal article: 10.11646/zootaxa.5422.1.1 (DOI)
- Journal article: http://zenodo.org/record/10805617 (URL)
- Journal article: http://publication.plazi.org/id/6E5AFFA3FFB7CA2AFFAF8670FF911415 (URL)
- Journal article: http://zoobank.org/AE955C5E-803E-44CB-A3B2-9C2616D9F185 (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/926387DBFF82CA1FFF388213FE8112F4 (URL)
Biodiversity
- Family
- Agnostidae
- Genus
- Neoagnostus
- Kingdom
- Animalia
- Order
- Agnostida
- Phylum
- Arthropoda
- Scientific name authorship
- Kobayashi
- Taxon rank
- genus
- Type status
- holotype
- Taxonomic concept label
- Neoagnostus Kobayashi, 1955 sec. Taylor, Loch & Repetski, 2024
References
- Kobayashi, T. (1955) The Ordovician fossils of the McKay Group in British Columbia, western Canada, with a note on the early Ordovician paleogeography. Journal of the Faculty of Science University of Tokyo, Section 2, 9, 355 - 493.
- Naimark, E. B. (2016) Revision of Pseudorhaptagnostus Lermontova (? Trilobita, Agnostida). Paleontological Journal, 50, 54 - 68. https: // doi. org / 10.1134 / S 0031030116010081
- Shaw, A. B. (1951) The paleontology of northwestern Vermont. I. New Late Cambrian trilobites. Journal of Paleontology, 25, 97 - 114.
- Kobayashi, T. (1966) The Cambro-Ordovician formations and faunas of South Korea, Part X. Stratigraphy of the Chosen Group in Korea and South Manchuria and its relation to the Cambro-Ordovician formations of other areas, Section B. The Chosen Group of North Korea and northeast China. Journal of Faculty of Science, University of Tokyo, Section II, 16 (2), 209 - 311.
- Jell, P. A. (1985) Tremadoc trilobites of the Digger Island Formation, Waratah Bay, Victoria. Memoirs of the Museum of Victoria, 46, 53 - 88. https: // doi. org / 10.24199 / j. mmv. 1985.46.03
- Lu, Y. - H. & Zhou, T. - R. (1990) Trilobites across the Cambrian-Ordovician boundary of the transitional region of Sandu, southeastern Guizhou. Palaeontologia Cathayana, 5, 1 - 84. https: // doi. org / 10.1007 / 978 - 3 - 662 - 12662 - 2 _ 1
- Gilberto, J. H. (2010) Nuevos trilobites de la Formacion Iscayach (Tarija-Bolivia). Memorias del XIX Congreso Geologico Boliviano, 2000 (1), 123 - 126.
- Shergold, J. H. (1975) Late Cambrian and Early Ordovician trilobites from the Burke River Structural Belt, western Queensland, Australia. Australian Bureau of Mineral Resources, Geology and Geophysics Bulletin, 153, 1 - 251.
- Shergold, J. H. (1977) Classification of the trilobite Pseudagnostus. Palaeontology, 20, 69 - 100.
- Lermontova, E. V. (1951) Verkhnekembriyskie trilobity i brakhiopody Boshche-Kulya (severo-vostochnyy Kazakhstan) (Upper Cambrian trilobites and brachiopods of Boshche-Kul, northeastern Kazakhstan). Vsegei, Moscow, 49 pp. [in Russian]
- Shergold, J. H. (1980) Late Cambrian Trilobites from the Chatsworth Limestone, western Queensland. Australian Bureau of Mineral Resources, Geology and Geophysics Bulletin, 186, 1 - 111.
- Shergold, J. H., Laurie, J. R. & Sun, X. - W. (1990) Classification and review of the trilobite of the trilobite order Agnostida Salter, 1864: An Australian perspective. Australian Bureau of Mineral Resources, Geology, and Geophysic s Report, 296, 1 - 92.
- Shergold, J. H. & Laurie, J. R. (1997) Introduction to the Suborder Agnostina. In: Treatise on Invertebrate Paleontology. Pt. O. Arthropoda 1. Trilobita. Revised. Vol. 1. Geological Society of America and University of Kansas Press, Lawrence, pp. 331 - 338.