... this complex disparity into discrete and consistent taxonomic units has been debated extensively (Downie and Sarjeant 1963 ; Staplin et al. 1965 ; Sarjeant and Stancliffe 1994 ; Servais 1996 ; Fatka and Brocke 2008 and references therein). Disparity analyses of large acritarch populations have helped...

... the northern end of the Tauride block and the Central Anatolian crystalline complex (e.g., Görür et al., 1984 , 1998 ; Gökten and Floyd, 1987 ; Gökten, 1993 ; Pourteau et al., 2010 ), with magmatism associated with the Eocene slab break-off event following ocean closure ( Kadioglu and Dilek, 2010...

... and Lespérance, 1995 ), as well as the spiriferid Brevispirifer ( Bizzaro and Lespérance 1999 ), all taxa that first occur in the Eifelian. The spore Grandispora velata , indicative of the Eifelian velata–langii Assemblage Zone, also occurs in this uppermost marine sandstone unit (cf. Uyeno and Lespérance 1997...

... of large acanthomorphic microfossils attributable to the Ediacaran Complex Acanthomorph Palynoflora (ECAP), a distinctive assemblage known elsewhere only from lower, but not lowermost, to middle Ediacaran rocks. Discovery of ECAP in strata previously considered Mesoproterozoic through Cryogenian confirms...

... that manifested themselves in a drastically reduced diversity of taxa and simplification of the structure of benthic catenas and were related to the destabilization of equilibrium of a complex of global abiotic factors and the chorological system under their control. Thus, the crisis of first type...

... . (2450–2451) Proposals to conserve the names Selenopemphix against Margosphaera , and S. nephroides against M. velata (Dinophyceae) . TAXON . 65 ( 3 ): 636 – 637 . Fensome RA...

... challenges, because it encompasses a number of form species widely used in lower Cambrian biostratigraphy. Moreover, subtle morphological differences among Skiagia species were suggested to underlie key evolutionary innovations toward complex reproductive strategies. Here we apply a multivariate morphometric...

... (1964) have postulated that the clastic sediments were derived from a northern provenance, the uplifted Frankl inian geosyncline, which extended along the northern margin of North America. DEVONIAN MEGASPORES, ARCTIC CANADA 667 Complex unconformable relat ionships west of the Mackenzie R iver area...

... sculpture that can be superficially similar to the hemispherical processes of Bacatisphaera , but the hemispherical processes of Bacatisphaera are more discrete and more widely separated from each other. Genus Bullatosphaera Vorob'eva, Sergeev, and Knoll, 2009 B. velata Vorob'eva...

... bifurcations. Small groups of processes may be connected by high septa. The processes are often aligned into rows parallel to the long axis of the cyst body, but some take a more random position, and others are arranged in arcuate complexes. The number of processes exceeds 80. The archeopyle is apical...

... to be a junior synonym of T. conoideum . The internal body represents the endocyst preserved in the zygotic cyst and sexual generation in the complex life cycle of a microorganism (see below). Yakutia, Siberian Platform, Nepa-Botuoba region, Zapad 844 and Ozero 761 boreholes, Khamaka Formation; Syugdzer...

... stratigraphy. Vychegda microfossils can be separated into three assemblages. The upper part of the formation contains large, profusely ornamented acritarchs broadly comparable to those of the Ediacaran Complex Acanthomorph Palynoflora, including species of the genera Alicesphaeridium , Asterocapsoides...

..., the base of Protohaploxypinus microcorpus Zone ( Helby et al. 1987 ) is defined by the first common occurrence of Falcisporites australis , P. microcorpus , Playfordiaspora velata and Triplexisporites playfordii . The FO of Lunatisporites pellucidus occurs within this zone, while the first common...

... of the Eastern Moesian Platform ( Fig. 1B ), which contains Middle and Upper Jurassic sedimentary deposits, which rest directly on low-grade metamorphosed turbidites of the Ediacaran Histria Formation ( BĂrbulescu 1974 ; Drăgănescu 1976 ; Oaie et al. 2005 ). The Moesian Carbonate Platform was a complex system...

... Resources, Journal of Australian Geology and Geophysics 1978 3 1 17 Pyatiletov V. G. Rudavskaya V. A. Sokolov B. S. Ivanovsky A. B. Acritarchs from the Yudomian Complex Vendian System 1985 Vol. 1 Moscow Nauka 151 158 (in Russian) Rudavskaya V. A. Vasileva N...

... & Butterworth, 1967 , Apiculatisporis porosus Williams in Neves et al ., 1973 , Auroraspora velata (Felix & Burbridge) Ravn, 1991 , Cordylosporites papillatus (Naumova) Playford & Satterthwaite, 1985 , Crassispora aculeata Neville, 1968 , C. maculosa (Knox) Sullivan, 1964...

... and vegetative cells. They represent the Chlorophytes in the class Prasinophyceae, which reproduce asexually (forming resting phycoma cysts), and Chlorophyceae, which reproduce sexually (zygotic cysts). Some species had a complex life cycle, with alternating vegetative and reproductive generations that differed...

.... Two sections from the Lublin basin were analysed: Giełczew PIG 5 and Krowie Bagno IG-1. Giełczew PIG 5 shows a complex palynofacies record. Palynofacies GI was represented by the interval from 2024 to 2013 m ( Figure 11 ). The whole palynofacies GI showed an increase in the number of miospores upwards...

... reproduction and multicellularity have been recognised since the Mesoproterozoic (Hermann 1990 ; Butterfield 2009 ; Knoll 2011 ; Moczydłowska et al. 2011 ; Agić et al. 2015 ; Zhu et al. 2016 ), during which ecosystems were becoming more complex. A billion years of evolution had populated the marine realm...

... the uppermost coal are shown in Table 3 . Detailed petrological study, sufficient to support the aims of this paper, was restricted to the mid LLF lower coal. More detailed study would require a follow-up research project, in which considerable complexity would be anticipated (see Styan and Bustin 1984...