Occurrence of paleozoic and early mesozoic radiolaria in Thailand (preliminary report)

Sashida, Katsuo; Igo, Hisayoshi; Hisafa, Ken-Ichiro; Nakornsri, Nikorn; Ampornmaha, Apsorn

doi:10.1016/0743-9547(93)90011-d

Cited by 79 publications

(39 citation statements)

References 7 publications

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“…Blome & Reed 1992 (Oregon, USA) 4/4 Smithian Yao & Kuwahara 1997(Inuyama, Japan) 4/7 Yao & Kuwahara 1999 2/2 Sashida 1983 7/13 8 Zhang et al 1999(Nadanhada, China) Bragin 1991 4/4 Sashida & Igo 1992, Sashida et al 1993 6/7 1/4 Feng 1992 (Southwest China) Feng & Liu 1993(Yunnan, China) Sugiyama 1992 22/26 19 Nagai & Mizutani 1993 (Gifu, Japan) 11/14 Spathian Kusunoki & Imoto 1996 (Kyoto, Japan) Yao & Kuwahara 1997 (Inuyama, Japan) 7/17 Isogawa et al 1998 (Ashio, Japan) 12 (17) 60 Kamata 1995, 1999 16/30 5 Feng et al 2000 (Yunnan, China) 12/27 Sashida et al 2000 (Northern Thailand) 38/50 4 Yao & Kuwahara 2000 (Guizhou,China) 11/14 Suzuki et al 2002 (Ashio, Japan) 15/30 Hori et al 2003 (Kaka Point, New Zealand) 7/15 3 sippian) "Lazarus taxa" reappeared from "unknown refuges", which are the origin for some phylogenetic connection at family or even at order level. The proposed "Lazarus recovery" is very big, about 50% of the genera that disappeared at the P/Tr boundary re-appeared only in the Olenekian-Middle Triassic interval.…”

Section: Faunal Stage Authormentioning

confidence: 99%

The plankton turnover at the Permo-Triassic boundary, emphasis on radiolarians

Wever

O’Dogherty

Goričan³

2006

Eclogae geol. Helv.

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The examination of plankton biodiversity through Permian-Triassic period seems to display different patterns of evolution depending of the scale of study (taxonomy stratigraphy or biogeography). In this paper we present the state of the art of the plankton turnover at the Permo-Triassic and we review more precisely the pattern of extinction and recovery of radiolarians during such period, because at that time, plankton was essentially represented by radiolarians. At a global scale the end-Permian to early Triassic period is marked by several strong extinctions in the marine realm, and in the radiolarians they occur progressively as exemplified by two orders of radiolarians: Albaillelaria and Latentifistularia. Nevertheless, this period is marked by a tremendous post-crisis diversification in both at family and generic level, more than extinction; an actualized revision of the diversity at the family level is also offered in our review. At a moderate scale (i.e. genera and in a region) the modifications appear impressive while at specific and regional domain the message is not so clear, one can wonder if some crisis manifestation results from a taxonomic accident or from preservative conditions. In fact, strangely enough more the number of studies is, more the diversity is high, and oppositely less they are, more the provincialism is evoked. RESUME L'examen de la biodiversité du plancton au passage Permien-Trias semble montrer différents types de manifestation selon l'échelle d'observation aussi bien en terme de stratigraphie que de taxonomie ou de géographie. A cette époque, le plancton était surtout représenté par les radiolaires. A une échelle globale cette période est certes marquée par des extinctions mais elles sont progressives comme le prouvent les deux ordres de radiolaires: les Albaillelaria et des Latentifistularia. Néanmoins cette période est surtout marquée par une énorme diversification post-crise, plus encore que par l'extinction. A une échelle moyenne (ex. niveau générique et celui d'un pays) les renouvellements de faune semblent impressionnants, alors qu'à l'échelle des espèces et de bassins particuliers, on est conduit à se demander si des modifications résultent de réelles crises biologiques ou de problèmes de conservation. Il est amusant de constater que plus le nombre d'études est élevé, plus la diversité apparaît grande et à l'opposé, plus elles sont rares, plus le provincialisme est évoqué. sic crisis within the sedimentary successions containing wellpreserved fossils indicate that during the Early Mesozoic a genuine radiation of microplankton took place, one that included heterotrophic as well as photoautotrophic protists. Undoubtedly, the radiolarians are the most important and dominant group among the microplankton after the Permo-Triassic crisis. This is the reason why we analyse in this paper the changes that occurred in this group.

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Section: Faunal Stage Authormentioning

confidence: 99%

The plankton turnover at the Permo-Triassic boundary, emphasis on radiolarians

Wever

O’Dogherty

Goričan³

2006

Eclogae geol. Helv.

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“…According to our Upper Devonian radiolarian materials collected from South China (Wang 1997;Wang et al 2003) and S128 Y. other published materials on Upper Devonian radiolarian faunas (Aitchison 1993;Boundy-Sanders et al 1999;Cheng 1986;Foreman 1963;Holdsworth et al 1978;Ishiga et al 1988;Kiessling & Tagelehn 1994;Li & Wang 1991;Nazarov 1973Nazarov , 1975Nazarov & Ormiston 1983;Nazarov et al 1982;Sashida et al 1993;Schwartzapfel & Holdsworth 1996;, we find that there are 77 and 35 species within the Frasnian Helenifore laticlavium zone and H. robustum zone respectively. They all belong to 15 genera and 8 families.…”

Section: Upper Devonian Radiolarian Diversitymentioning

confidence: 99%

Influence of the Frasnian-Famennian event on radiolarian faunas

Wang

Luo

Aitchison

2006

Eclogae geol. Helv.

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“…Occurrences of Permian radiolarians are widespread and they have now been studied in many regions; northern Thailand (Chiang Mai: e.g. Caridroit 1991Caridroit , 1993Caridroit et al 1992;Sashida et al 1993;Wonganan et al 2002), north-central Thailand (Sukhothai: Sashida & Nakornsri 1997), northeastern Thailand (Loei: e.g. Sashida et al 1993;Sashida & Igo 1999), eastern Thailand (Sra Khaew: e.g.…”

Section: Introductionmentioning

confidence: 99%