Diversity and paleobiogeographic distribution patterns of early and Middle Ordovician graptolites in distinct depositional environments of South China

Zhang, Yuandong; Chen, Xu; Goldman, Dan; Zhang, Ju; Cheng, Jing; Song, Yong

doi:10.1007/s11430-010-4088-7

Cited by 36 publications

(20 citation statements)

References 25 publications

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“…Li et al (2004) discussed acritarch inshore -offshore transect in South China, and implied that the Honghuayuan section represented an area located between the near-shore and the offshore carbonate shelf. Yan et al (2013) recognized four associations from 10 acritarch assemblages in the deflexus -suecicus graptolite biozone intervals and indicated that the acritarch assemblages from the Honghuayuan (Tongzi) and Guanyinqiao (Zhang et al 2002(Zhang et al , 2010. Based on the acritarch data combined with the result of lithofacies studies (Zhang et al 2002(Zhang et al , 2010, we suggest that the acritarch assemblage from both the Guanyinqiao and Huanghuayuan section (Meitan Formation) represent an inner-shelf mudcarbonate belt environment.…”

Section: Palaeoenvironmental Implicationsmentioning

confidence: 66%

An Early–Middle Ordovician acritarch and prasinophyte assemblage from the Meitan Formation in Qijiang, Chongqing, South China

Yan

Meng

2014

GFF

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Acritarchs and prasinophytes representing 39 species in 26 genera are identified from the Early -Middle Ordovician Meitan Formation in the Guanyinqiao section, Qijiang, Chongqing in South China. This palynomorph assemblage is dominated by the genera Polygonium (35.2%), Striatotheca (15.2%), Stelliferidium (12.5%) and Leiosphaeridia (10.2%) showing similarities to assemblages from deflexus -suecicus graptolite biozone (Meitan Formation, upper Floian-lower Dapingian) in the Honghuayuan section and can be correlated to the contemporaneous global acritarch assemblages. The composition of the acritarch assemblage from the Meitan Formation of the Guanyinqiao section implies an inner-shelf depositional environment for the studied successions.

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Section: Palaeoenvironmental Implicationsmentioning

confidence: 66%

An Early–Middle Ordovician acritarch and prasinophyte assemblage from the Meitan Formation in Qijiang, Chongqing, South China

Yan

Meng

2014

GFF

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“…In a recent study on the Early and Mid Ordovician graptolite diversity and biogeography of South China, Zhang et al (2010) also found water depth and distance from the palaeoshoreline to be the main controls on local and regional distributions. In a recent study on the Early and Mid Ordovician graptolite diversity and biogeography of South China, Zhang et al (2010) also found water depth and distance from the palaeoshoreline to be the main controls on local and regional distributions.…”

Section: Historical Development Of Graptolite Palaeoecological and Pamentioning

confidence: 96%

Chapter 26 Graptolite palaeobiogeography

Goldman

Maletz

Melchin

et al. 2013

Memoirs

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Graptolite faunas exhibited strong biogeographical differentiation during the Early Palaeozoic, particularly in the Ordovician. Skevington recognized two major faunal provinces, the high to mid palaeolatitude ‘Atlantic Province’ and the low-palaeolatitude ‘Pacific Province’. Subsequent workers have generally accepted this pattern of graptolite distribution, but the controls on this pattern have been the subject of considerable debate. Two competing models have emerged: a surface water temperature model and a depth stratification model. It is likely that the some of the physical and chemical oceanic factors that vary with latitude may also vary in a similar way along an onshore to offshore transect. Hence, it may be that both depth and surface temperature play an important role in biogeographical differentiation. Biogeography also played a critical role in the evolutionary history of graptoloids. Important examples include the origination of axonophorans in deep, offshore environments from isograptid and pseudisograptid ancestors and their subsequent migration into shallow water regions; the replacement of the Diplograptina by Neograptina in the low palaeolatitudes during the Late Ordovician extinction event; and the origination of expansograptids in the ‘Atlantic’ Province as shallow water endemics followed by their worldwide dispersal into the oceanic biofacies.

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“…The Ordovician rocks of South China occupy three principal regions based on depositional regimes (Zhang et al 2010; Fig. 1A): (1) Yangtze Region (Platform) situated in the northwest of South China, which is dominantly carbonate or a mixture of carbonates and siliciclastics (e.g.…”

Section: Geological Setting and Materialsmentioning

confidence: 99%

A new leptomitid-like sponge from the Early Ordovician of China with heteractinid spicules

Botting¹,

Zhang²

2012

Bull. Geosci.

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A new sponge, Heteractenigma yui gen. et sp. nov., is described from the Corymbograptus deflexus Biozone (Floian) of the Ningkuo Formation in western Zhejiang Province, China. The tall, thin-walled species possessed unique features including a combination of robust longitudinal monaxons, fine sub-transverse monaxons, and minute hexactine and heteractine body wall spicules. The heteractine spicules have five rays in one plane, and closely resemble those of the problematic Burgess Shale sponge Petaloptyon danei. The monaxon organisation and body form, in contrast, accord with those of leptomitids. Although it is not currently possible to establish the precise relationships of this species, due to the major differences from other known taxa, it includes features characteristic of heteractinids, reticulosans and leptomitid protomonaxonids. This may indicate that the species belongs to the stem-group of either Porifera or Silicea. The unique architecture of the species also confirms that there remain large gaps in our knowledge of early sponges, even at high taxonomic level.•

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Diversity and paleobiogeographic distribution patterns of early and Middle Ordovician graptolites in distinct depositional environments of South China

Cited by 36 publications

References 25 publications

An Early–Middle Ordovician acritarch and prasinophyte assemblage from the Meitan Formation in Qijiang, Chongqing, South China

An Early–Middle Ordovician acritarch and prasinophyte assemblage from the Meitan Formation in Qijiang, Chongqing, South China

Chapter 26 Graptolite palaeobiogeography

A new leptomitid-like sponge from the Early Ordovician of China with heteractinid spicules

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