Podrobnosti záznamu

    Taxonomic reconsideration of Multiplisphaeridium Staplin, 1961 and other acritarch genera with branching processes
Údaj o odpovědnosti
    W.A.S. Sarjeant, Milada Vavrdová
    Sarjeant, W. A. S.
    Vavrdová, Milada
Zdrojový dokument - seriál
    Vol. 5
    p. 52
    4 obr., 3 tab., 5 pl., 6 s.bibl.
Předmětová skupina
    nový taxon
    popis taxonů
Klíčové slovo
Abstrakt (anglicky)
   The acritarch genus Multiplicisphaeridium, originally proposed in 1961, has expanded in concept until it has come to embrace a great variety of morphologies. Its diagnostic is restricted herein to forms exhibiting at least two major orders of process branching. An emended diagnosis is proposed for the type species, M. ramispinosum. The other 262 species hitherto placed into this genus are reconsidered; 39 species are retained in Multiplicisphaeridium and 122 redistributed among 35 other acritarch genera. Seven other species are considered to be muellerisphaerids; two of these are formally transferred to the genus Aldridgeisphaera, the others being provisionally retained in Multisplicisphaeridium. The residue of species formerly placed in Multiplicisphaeridium have either been reattributed already to other acritarch genera, treated as taxonomic junior synonyms or shown to be invalid or of questionable validity.
   As a consequence of this restudy, the diagnoses of eith other genera - Ammonidium, Diexallophasis, Evittia, Lusatia, Petaloferidium, Tylotopalla, Unellium and Vogtlandia - are emended and their species content critically reviewed. Three new genera - Martinsphaeridium, Rhaetosphaeridium and Wicanderidium - are proposed. This reorganization of species attribution is illustrated graphically; it gives a greater coherence to the stratigraphical ranges of the genera, those of Multiplicisphaeridium, Ammonidium and Martinsphaeridium closely overlapping
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
Datum vložení
    28. 3. 2008
Datum importu
    8. 8. 2012