The first spinicaudatan (Crustacea: Diplostraca) from Permo-Triassic continental sequences of South America and its palaeoecological context

Tassi, Lara Vaz; Monti, Mariana; Gallego, Oscar Florencio; Zavattieri, Ana Marı́a; Lara, María Belén

doi:10.1080/03115518.2013.736793

Cited by 16 publications

(18 citation statements)

References 26 publications

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“…The paleontological content of QF Formation includes palynomorphs; plants; invertebrates; and vertebrates (e.g., Ottone and García, 1991;Morel and Artabe, 1994;Stipanicic et al, 2002;Sepúlveda et al, 2007;Gallego et al, 2009;Vaz-Tassi et al, 2013). Whereas the paleontological content of the RSQ Formation includes the mediumsized kanemeyeriid dicynodonts: Kanameyeria argentina and Vinceria sp.…”

Section: Geological Settingmentioning

confidence: 99%

Diagenetic analysis of tetrapod from the Upper Triassic, Puesto Viejo Group, Argentina

Previtera

Mancuso

Fuente

et al. 2016

andgeo

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The Puesto Viejo Group crops out in the San Rafael Block, southwest Mendoza, Argentina. This group is an important unit for the knowledge theTriassic faunas. It is composed of basal Quebrada de los Fósiles Formation (QF) overlying by the Río Seco de la Quebrada Formation (RSQ). In this study, we report tetrapod remains from the RSQ Formation that includes, until now, exclusively therapsids. Non-mammalian therapsids predominated in terrestrial ecosystems during the Late Paleozoic and Early Mesozoic. Although cynodonts and dicynodonts have been studied from several perspectives, the relation between taxa and sedimentary context has been scarcely documented. This study is aimed to elucidate the diagenesis of tetrapods from the Puesto Viejo Group and its relation to depositional environment. Diagenetic features of therapsid bones from the RSQ Formation were analyzed through thin sections to interpret the degree of taphonomic alteration. Diagenetic processes inferred include substitution; fracturing; brittle deformation and different permineralization events. Combined analyses through scanning electron microscopy; energy-dispersive X-ray spectrometry (SEM-EDX); X-ray diffractometry (XRD) and petrographic studies reveals the substitution of hydroxyapatite by francolite. The presence of fluorine in some samples suggests a link between the elemental composition and depositional environments: floodplain and crevasse splay. Permineralization stages include infilling of vascular canals, trabeculae and fractures with iron oxides and iron carbonate minerals during the burial history. This contribution represents a relevant approach to elucidate the relation between diagenesis on tetrapods and their paleoenvironments, as exemplified in this case study from the Puesto Viejo Group during the Upper Triassic.

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Section: Geological Settingmentioning

confidence: 99%

Diagenetic analysis of tetrapod from the Upper Triassic, Puesto Viejo Group, Argentina

Previtera

Mancuso

Fuente

et al. 2016

andgeo

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“…Colour change and the degree of deformation of conchostracan valves may have some potential in thermal alteration studies (Supplementary material 3) but this method is far from being well explored. Consequently,very few studies refer to Tasch"s valve geothermometry (e.g Lana and Carvalho, 2002;Tassi et al, 2013)…”

mentioning

confidence: 98%

Optical thermal maturity parameters and organic geochemical alteration at low grade diagenesis to anchimetamorphism: A review

Hartkopf‐Fröder

Königshof

Littke

et al. 2015

International Journal of Coal Geology

160

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“…Of special interest [1,[6][7][8][9][10][11][12][13][14][15] is the shell microsculpture of these small crustaceans -a strengthening skeletal formation of the thin valves with a certain type, or with several types, of ornamentation -, which is a possible diagnostic feature of conchostracan genera and species. The key role of shell microsculpture for conchostracan identification was first stressed by N.I.…”

Section: Introductionmentioning

confidence: 99%

Microsculpture Study of Late Permian and Early Triassic Conchostracans From the Babii Kamen Section (Western Siberia)

Sabirova¹

2019

Uch. Zap. Kazan. Univ. Ser. Estestv. Nauki

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The microsculpture of Permian and Triassic conchostracans from the Babii Kamen section (Western Siberia) was studied in order to determine the significance of microsculpture inthe taxonomy of conchostracan species. Five types of ornamentation have been identified in conchostracans from the Permian-Triassic reference section of Western Siberia (Babii Kamen section): pitted, nodular, reticulated, radial lirae, radial fringes. The results show that several microsculpture types are common for the genus level of conchostracans. Transition from one type of ornamentation to another was noted in three species: ?Megasitum lopokolense Novojilov, 1970, "Cornia papillaria" Lutkevich, 1937, and "Concherisma tomensis" Novojilov, 1958. The observed changes in the shell microsculpture types can be considered as a taxonomic feature for these three species and should form the base for future taxonomical revisions.

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The first spinicaudatan (Crustacea: Diplostraca) from Permo-Triassic continental sequences of South America and its palaeoecological context

Cited by 16 publications

References 26 publications

Diagenetic analysis of tetrapod from the Upper Triassic, Puesto Viejo Group, Argentina

Diagenetic analysis of tetrapod from the Upper Triassic, Puesto Viejo Group, Argentina

Optical thermal maturity parameters and organic geochemical alteration at low grade diagenesis to anchimetamorphism: A review

Microsculpture Study of Late Permian and Early Triassic Conchostracans From the Babii Kamen Section (Western Siberia)

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