Ostracods (Crustacea) of the Early-Middle Permian from Central Thailand (Indochina block). Part I. Order Palaeocopida

Chitnarin, Anisong; Crasquin, Sylvie; Charoentitirat, Thasinee; Tepnarong, Prachya; Thanee, Nathawut

doi:10.5252/g2012n4a5

Cited by 18 publications

(25 citation statements)

References 16 publications

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“…Central Thailand, Khao Tham Yai locality, Phetchabun Province, Late–Middle Permian, Ta Kli section, Tak Fa Formation, Nakhon Sawan Province, Middle Permian, north‐eastern Thailand, Tham Nam Maholan section, Loei Province, Early Permian (Chitnarin et al . ).…”

Section: Systematic Palaeontologymentioning

confidence: 97%

“…All Lower and Middle Permian specimens are from T hailand (Chitnarin et al . ), and all Upper Permian specimens are from S outh C hina ( G uangxi P rovince: Shi and Chen ; M eishan GSSP , Z hejiang P rovince: Crasquin et al . ) and I ran (this work); 1, female; 2, male.…”

Section: Systematic Palaeontologymentioning

confidence: 99%

“…Three Palaeocopid species found from the present section are also known from the Early and Middle Permian of other localities (Thailand; Chitnarin et al . ; Cyathus caperata, C. elliptica, Paraparchites chenshii ), two of them allow insights into their evolution throughout the Permian.…”

Section: Size Change Through Timementioning

confidence: 99%

“…); length (bottom) and height (top) distributions of all Lower (light shade), Middle (middle shade) and Upper Permian (dark shade) specimens for the reconstructed ontogenies; length and height growth rates ( K L and K H , respectively) are plotted at the transition between each developmental stage and were calculated from Thailand specimens for the E arly and Middle Permian (Chitnarin et al . ) and from M eishan, C hina, for the Late Permian (Crasquin et al . ).…”

Section: Size Change Through Timementioning

confidence: 99%

“…B, P araparchites chenshii from the Early–Middle Permian of T hailand (Chitnarin et al . ) and the Late Permian of S outh C hina ( G uangxi: Shi and Chen ; M eishan, Z hejiang: Crasquin et al . ) and I ran (this work; H/L scatter plot in Fig.…”

Section: Size Change Through Timementioning

confidence: 99%

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Precocious sexual dimorphism and the Lilliput effect in Neo‐Tethyan Ostracoda (Crustacea) through the Permian–Triassic boundary

et al. 2015

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The Elikah River section spanning the Lopingian (Late Permian) to the Griesbachian (Early Triassic) time interval in the Central Alborz Mountains (north Iran) was sampled for ostracod analysis. We report 79 species distributed among 38 genera. Four new species are described: Acratia? pervagata Forel sp. nov., Microcheilinella alborzella Forel sp. nov., Basslerella superarella Crasquin sp. nov. and Cavellina nesenensis Crasquin sp. nov. The ontogeny of 13 species is described and sexual dimorphism in the genus Microcheilinella is here undoubtedly recognized for the first time. Six species show precocious sexual dimorphism of their carapace as early as A‐5 juvenile. The Lilliput effect is for the first time recorded and quantified for two species. Rare long‐time span Palaeocopida species, known throughout the entire Permian, document relatively long‐term evolution, including the size and growth rate modifications associated with the earlier appearance of carapace sexual dimorphism through time. These patterns might be related to the Guadalupian–Lopingian events and/or to climatic modifications occurring during the Permian interval.

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Section: Systematic Palaeontologymentioning

confidence: 97%

Section: Systematic Palaeontologymentioning

confidence: 99%

Section: Size Change Through Timementioning

confidence: 99%

Section: Size Change Through Timementioning

confidence: 99%

Section: Size Change Through Timementioning

confidence: 99%

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Precocious sexual dimorphism and the Lilliput effect in Neo‐Tethyan Ostracoda (Crustacea) through the Permian–Triassic boundary

et al. 2015

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Microbial-, fusulinid limestones with large gastropods and calcareous algae: an unusual facies from the Early Permian Khao Khad Formation of Central Thailand

Ketwetsuriya

Nose

Charoentitirat

et al. 2020

Facies

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The Early Permian (Kungurian) Khao Khad Formation of Central Thailand consists mostly of carbonates deposited on the western margin of the Indochina Terrane. This formation has yielded unusual microbial-fusulinid limestones with large gastropods which contribute most to the rock volume. With a height of more than 6 cm, the gastropods are amongst the largest Early Permian gastropods ever reported. Gastropods as major rock formers are rare in the Palaeozoic. This, and other recently reported invertebrate faunas from Thailand show that gastropods may dominate Permian fossil assemblages not only in diversity, but also regarding abundance and in some cases also regarding biomass. Besides gastropods, fusulinids, various calcareous algae, intraclasts and thick microbial-cyanobacterial (Girvanella and Archaeolithoporella) coatings and reticular microbial patches as well as thick inter- and intragranular radial fibrous cement crusts are present. The gastropods represent at least four species and belong probably to undescribed taxa. The fusulinid genus Pseudofusulina and Misellina (M.) termieri are reported from the Khao Khad Formation for the first time and indicate a Bolorian age. Calcareous algae are dominated by dasycladaceans followed by gymnocodiaceans and solenoporaceans. The studied limestone almost completely lacks metazoan reef builders such as corals and sponges. Likewise, brachiopods and bivalves are absent in the studied samples and echinoderms are very scarce. The carbonate is interpreted as product of shallow water, back-reef lagoonal platform community with a high productivity providing the large gastropods with sufficient food. However, conditions were too eutrophic for sessile filter feeders including metazoan reef builders.

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Organic geochemistry of the Lower Permian Tak Fa Formation in Phetchabun Province, Thailand: implications for its paleoenvironment and hydrocarbon generation potential

Chenrai

Fuengfu

2019

Acta Geochim

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Ostracods (Crustacea) of the Early-Middle Permian from Central Thailand (Indochina block). Part I. Order Palaeocopida

Cited by 18 publications

References 16 publications

Precocious sexual dimorphism and the Lilliput effect in Neo‐Tethyan Ostracoda (Crustacea) through the Permian–Triassic boundary

Precocious sexual dimorphism and the Lilliput effect in Neo‐Tethyan Ostracoda (Crustacea) through the Permian–Triassic boundary

Microbial-, fusulinid limestones with large gastropods and calcareous algae: an unusual facies from the Early Permian Khao Khad Formation of Central Thailand

Organic geochemistry of the Lower Permian Tak Fa Formation in Phetchabun Province, Thailand: implications for its paleoenvironment and hydrocarbon generation potential

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