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  • 1.
    Holmer, L. E.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Popov, L. E.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Early Cambrian Linulellotreta (Lingulata, Brachiopoda) from South Kazakhstan (Malyj Karatau Range) and South China (Yunnan)1997In: Journal of Paleontology, Vol. 71, 577-5883 p.Article in journal (Refereed)
  • 2.
    Holmer, L. E.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Popov, L. E.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Early Paleozoic radiation and classification of organo-phosphatic brachiopods1996In: Proceedings of the third International Brachiopod Congress (Sudbury/Ontario/Canada/2-5 September 1995), 1996, 117-121 p.Conference paper (Refereed)
  • 3.
    Holmer, L. E.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Popov, L. E.
    VSEGEI, St. Petersburg, Russia..
    Wrona, Ryszard
    nstytut Paleobiologii PAN, Warsw wa, Poland..
    Early Cambrian lingulate brachiopods from glacial erratics of King George Island, (South Shetland Islands), Antarctica1996In: Paleontologica Polonica, Vol. 55, 37-50 p.Article in journal (Refereed)
    Abstract [en]

    Erratic bould ers of Early Carnbrian age, occ urr ing withi n the Early Miocene glac io-rnarineCape Melvi lle Formation on King George Island (So uth Shetland Island s), Antarctica, haveyielded lingul ate brachiopods including Eoobolus aff. elatus (Pelman, 1986), Karathelenapuru (Kruse, 1990) and Vandalotreta djagoran (Kruse , 1990). It is the firs t EarlyCambrian brac hiopo d ass emblage described from Antarctica . The faun a is closely similarto that from the late Early Cambrian (Toyo nia n) Wirrealp a and Aroo na Creek Limestones,Flinders Ranges, South Austra lia. The new family Eoobolidae is prop osed and the typespec ies of Eoobolus, E. triparilis (Matthew, 19(2) is re- fig ured. The evo lution of thebotsfordiid s and acro thelids is disc ussed in the light of the new materi al of Karathelenapuru, which is intermedia te in morph ology between Botsfordia and Eothe le. The superfamilyAcrot heloidea , is referred to the order Lingulida because of the similarities in musclesys tem, shell structure and deve lopment of pseudointerareas.

  • 4.
    Holmer, Lars E.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Popov, L.
    Bassett, Michael G.
    Silurian craniide brachiopods from Gotland2013In: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 56, no 5, 1029-1044 p.Article in journal (Refereed)
    Abstract [en]

    Seven craniide brachiopod genera are described from the Silurian (Wenlock–Ludlow) of Gotland, including one new genus and five new species. The new genus and species Thulecrania septicostata is unique among Silurian craniides as it possesses solid spines. The new species Lepidocrania multilamellosa is the first Silurian record of this poorly known Permian genus. The problematic North American Propatella Grubbs, , was originally described as a gastropod, but the new species Propatella palmaria from Gotland shows that it is a craniide with sutured hollow spines of a type not previously recorded from Silurian craniides. The dorsal valves of the new species Valdiviathyris? bicornis are remarkably similar to those of the type species and represent the first possible Palaeozoic record of this poorly known extant craniide. This first systematic study of craniide brachiopods from the Silurian of Gotland shows that the diversity is relatively high as compared to other known Silurian craniide faunas, but a more thorough comparison is not possible due to the lack of data from most parts of the world. The new data from Gotland support the view that the craniides were not affected by the end-Ordovician extinction.

  • 5.
    Holmer, Lars
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Popov, L. E.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Streng, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Organophosphatic stem group brachiopods: implications for the phylogeny of the subphylum Linguliformea2008In: Brachiopoda: fossil and recent / [ed] Harper, David A, Chichester: Wiley-Blackwell , 2008, Vol. 54, 3-11- p.Chapter in book (Other academic)
  • 6.
    Holmer, L.E.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Popov, L.
    Linguliformea2007In: Treatise on Invertebrate Paleontology: Part H Brachiopoda (revised), Geological Society of America. and University of Kansas , 2007, 2532-2579 p.Chapter in book (Refereed)
  • 7. Popov, L. E.
    et al.
    Bassett, M.G.
    Holmer, L.E.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Craniata2007In: Treatise on Invertebrate Paleontology: Part H Brachiopoda (revised), Palaeontological Inst , 2007, 2590-2591 p.Chapter in book (Other (popular science, discussion, etc.))
  • 8.
    Popov, L. E.
    et al.
    Department of Geology, National Museum of Wales, Cardiff, Wales, UK.
    Bassett, Michael G.
    Department of Geology, National Museum of Wales, C.
    Holmer, Lars E.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Earliest ontogeny of Early Palaeozoic Craniiformea: compelling evidence for lecithotrophy2012In: Lethaia: an international journal of palaeontology and stratigraphy, ISSN 0024-1164, E-ISSN 1502-3931, Vol. 45, no 4, 566-573 p.Article in journal (Refereed)
    Abstract [en]

    The early ontogeny of Palaeozoic Craniiformea (Brachiopoda) remains controversial, with conflicting reports of evidence indicating lecithotrophic versus planktotrophic larval stages. Further compelling evidence for lecithotrophy in Palaeozoic craniiforms is described here. Newly obtained, well-preserved Silurian specimens of craniiforms, including Craniops (Craniopsida), and Lepidocrania? and Orthisocrania (Craniida) from Gotland and the St. Petersburg region, form the basis for this study. The new material demonstrates that the characters of shell structure and shell formation provide evidence of early differentiation of an adult dorsal mantle, and the presence of a distinctive primary layer with a characteristic lath-like pattern indicates that these craniiforms underwent a lecithotrophic larval stage, more or less identical to that of living.

  • 9.
    Popov, L. E.
    et al.
    Department oJ Stratigraphg and. Pataeontolngg, St. Petersburg, Russia.
    Holmer, L. E.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Gorjansky, V. Ju.
    Prospect Kima St. Petersburg, Russia.
    Middle Cambrian lingulate brachiopods from Tarbagatay Range, Kazakhstan1996In: Acta Paleontologica Polonica, ISSN 0567-7920, Vol. 41, 299-317 p.Article in journal (Refereed)
    Abstract [en]

    Early Middle Cambrian (Amgian) lingulate brachiopods from the TarbagatayRange in eastern Kazakhstan represent mosfly endemic taxa, which may suggestthat the Tarbagatay Range was relatively isolated from adjacent terranes duringthat time; oriy Kl.eithriatreta indicate similarity with the Australian part of Gondwana,as well as v{rith the south and central Kazakhstanian terranes. Late MiddleCambrian {Mayan) taxa from the same area are mostly cosmopolitan' Kostjubellarelnxata gen. et sp. n., Prototreta(?) doLosa sp. n. and Stilpnatreta galinae sp. n.are proposed.

  • 10. Popov, L.
    et al.
    Holmer, L.E.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Chileata2007In: Treatise on Invertebrate Paleontology: Part H Brachiopoda (revised), The Geological Society of America, University of Kansas , 2007, 2595- p.Chapter in book (Refereed)
  • 11.
    Popov, Leonid E.
    et al.
    Department of Geology, National Museum of Wales, Cardiff UK; .
    Egerquist, Eva
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Holmer, Lars E.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Earliest ontogeny of Middle Ordovician rhynchonelliform brachiopods (Clitambonitoidea and Polytoechioidea): Implications for brachiopod phylogeny2007In: Lethaia: an international journal of palaeontology and stratigraphy, ISSN 0024-1164, E-ISSN 1502-3931, Vol. 40, no 1, 85-96 p.Article in journal (Refereed)
    Abstract [en]

    New data on the earliest ontogeny of Mid-Ordovician Baltoscandian clitambonitoid (Apomatella, Neumania and Oslogonites) and polytoechioid (Antigonambonites and Raunites) brachiopods reveal significant differences in the life history of the taxa belonging to these two superfamilies. The Polytoechioidea and probably other members of the Billingsellida had planktotrophic larvae, in which the dorsal and ventral mantle lobes formed separately and without reversion. The 'pedicle sheath' in Antigonambonites is secreted by a section of modified ventral mantle and thus this 'pedicle' is not homologous within the pedicle of rhynchonellate brachiopods. It is likely that polytoechioids and other members of the strophomenate clade had the same type of ontogeny and mode of attachment. In contrast, the ontogeny and mode of attachment of clitambonitoids are similar to that of recent rhynchonellates: their mantle lobes and both valves formed simultaneously, and the pedicle most likely formed from the larval pedicle lobe. Evidence for the lecithotrophic nature of clitambonitoid larva is discussed. This confirms that the Clitambonitoidea, unlike the Polytoechioidea, represents an ingroup within the Rhynchonellata.

  • 12. Popov, Leonid
    et al.
    Holmer, Lars E.
    Palaeobiology. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Miller, J. F.
    Lingulate brachiopods from the Cambrian-Ordovician boundary beds of Utah2002In: Journal of Paleontology, ISSN 0022-3360, E-ISSN 1937-2337, Vol. 76, no 2, 211-228 p.Article in journal (Refereed)
    Abstract [en]

    Seven genera and eight species of lingulate brachiopods are described from the Cambrian-Ordovician boundary beds (Cambrooistodus minutus Conodont Subzone to Rossodus manitouensis Conodont Zone) at the Lawson Cove and Lava Dam North sections, Ibex area, Utah, USA. The fauna includes one new linguloid genus, Wahwahlingula, and four new species, Lingulella? incurvata, Zhanatella utahensis, Conotreta millardensis, and Quadrisonia? lavadamensis. Lingulate brachiopods from this interval are very poorly known from Laurentia, but the recorded fauna is very similar to that described from coeval beds at Malyi Karatau, Kazakhstan, and both areas contain Eurytreta cf. bisecta (Matthew, 1901); E. sublata Popov, 1988; ZhanatellaKoneva, 1986; SchizambonWalcott, 1889; and Wahwahlingula. Eurytreta cf. bisecta is also known from the Lower Ordovician of Avalonian Canada, Britain, and Scandinavia.

  • 13. Popov, Leonid
    et al.
    Holmer, Lars E.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Rowell, A. J.
    Peel, J. S.
    Late early Cambrian brachiopods from North Greenland1997In: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 40, 337-354 p.Article in journal (Refereed)
1 - 13 of 13
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