Une nouvelle espèce de Podocnemis (Pleurodira, Podocnemididae) provenant du Néogène de la formation Solimões, Acre, Brésil

Carvalho, Patricia; Bocquentin, Jean

doi:10.1016/s0016-6995(02)00081-5

Cited by 24 publications

(8 citation statements)

References 10 publications

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“…The whole list includes 225 genera, distributed as follows: 128 genera for the Mesopotamian, 75 for Laventan, 55 for Acre, and 33 for Urumaco. These disparities indicate that the Acre and Urumaco assemblages are well below their real diversity, as confirmed by the number of new taxa being described for the Acre region alone in recent years (Campbell et al, 2000;Carvalho et al, 2002;Alvarenga and Guilherme, 2003;Kay and Cozzuol, in press;Cozzuol et al, in press); many specimens representing new taxa still await study in the collections (personal observation). Table 1 presents similarity values using three coefficients for the assemblages, showing a maximum similarity between the Acre and Urumaco assemblages, followed by Acre and Mesopotamian.…”

Section: Relationshipsmentioning

confidence: 92%

The Acre vertebrate fauna: Age, diversity, and geography

Cozzuol

2006

Journal of South American Earth Sciences

158

144

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Section: Relationshipsmentioning

confidence: 92%

The Acre vertebrate fauna: Age, diversity, and geography

Cozzuol

2006

Journal of South American Earth Sciences

158

144

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“…12 and include: (i) dominance of low‐energy bedforms (current ripples); (ii) moderately thick, IHS successions and couplets; (iii) laterally extensive IHS members; (iv) rhythmic occurrence of low‐frequency IHS; (v) imbricate cosets; and (vi) localized presence of freshwater fossils. An articulated, side‐necked turtle fossil has been discovered from the facies association at locality D (Carvalho et al. , 2002).…”

Section: Inclined Heterolithic Stratification Faciesmentioning

confidence: 99%

“…The arguments used against tidal affinity involve fossil data rich in terrestrial vertebrates, including ancient freshwater turtles, and fish that are typical of modern Amazonian flood plains (Frailey, 1986; Paxton & Crampton, 1996; Latrubesse et al. , 1997; Carvalho et al. , 2002; Brito & Deynat, 2004).…”

Section: Introductionmentioning

confidence: 99%

Tidal and seasonal controls in the formation of Late Miocene inclined heterolithic stratification deposits, western Amazonian foreland basin

et al. 2007

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Upper Miocene strata in the Acre sub-basin, Brazil, consist dominantly of various types of inclined heterolithic stratification and pedogenic horizons. These strata were sedimentologically and ichnologically described to: (i) study different temporal controls responsible for inclined heterolithic stratification generation and their variation in a distal-proximal trend; and (ii) delineate the depositional setting. For this purpose, nine representative outcrops were sedimentologically and ichnologically studied, and their facies associations described. Thickness variations of the heterolithic strata of various orders (lamina, lamina bundles and beds) were analysed by statistical methods (Fourier transform). The deposits were interpreted as tidally and seasonally influenced estuarine or delta-related and continental strata. The inclined heterolithic stratification deposits represented vastly different settings ranging from tidally dominated, brackish-water ichnofossils-bearing channels to seasonally controlled, articulated Purussaurus (a freshwater alligator) fossilbearing channels. Several time cycles were distinguished in the strata, including semi-diurnal, fortnightly and seasonal. Tidal imprint was best observed in low-energy brackish-water settings, whereas seasonal rhythmicity was distinguishable throughout the depositional system. However, the latter was most apparent in riverine channels proximal to the inferred fluvio-tidal transition. The different temporal controls commonly had distinguishable impact on sedimentological and ichnological properties in the studied sediments. The differing properties included: (i) the degree and nature of lateral variability with respect to lithology and bedforms in inclined heterolithic stratification; (ii) the lateral continuity of inclined heterolithic stratification; (iii) the nature of sedimentary contacts between the inclined heterolithic stratification members; (iv) thickness variation of inclined heterolithic stratification members within a set; (v) the cyclicities observed in inclined heterolithic stratification series; (vi) the degree of bioturbation; (vii) the types of trace fossils observed; and (viii) the distribution of bioturbation in adjacent inclined heterolithic stratification members.

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“…Nostimochelone lampra was a mid-sized podocnemidoidean turtle, with estimated carapace length exceeding 350 mm (maximum preserved length/width = 323.7/277 mm); consistent with currently extant podocnemidoideans including Erymnochelys Baur 1888 and Podocnemis Wagler 1830 (sensu Gaffney 1988), both of which range from around 300 to over 400 mm long (see Wood 1976Wood , 2003de Lapparent de Broin and Negri 1993;Carvalho and Bocquentin 2002). The holotype (NMP V1) comprises an undistorted carapace and plastron encased in a block of hard, fine-grained silcrete-conglomerate.…”

Section: Descriptionmentioning

confidence: 75%

Nostimochelone lampra gen. et sp. nov., an Enigmatic New Podocnemidoidean Turtle from the Early Miocene of Northern Greece

Georgalis

Velitzelos

et al. 2012

Vertebrate Paleobiology and Paleoanthropology

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A new podocnemidoidean turtle, Nostimochelone lampra gen. et sp. nov., was recently recovered from littoral marine-estuarine sediments of the lower Miocene Zeugostasion Formation, near the village of Nostimo in northwestern Macedonia, Greece. This new taxon is characterized by a mosaic of primitive and derived features most notably the presence of a broad embayment on the anterior carapace margin, which involves both the nuchal (whose width [ length) and first pair of peripherals, a continuous series of six markedly elongate and very narrowed hexagonal neural bones, extension of the axillary buttress onto the midline of the anteroposteriorly elongate costal I (leaving a concave scar) and also laterally across the peripheral II-peripheral III suture, medial contact of the humeral scutes (implying a small intergular), and extensive overlap of the pectoral scutes on the entoplastron, probably extending to the epiplastral-hyoplastral suture. Conclusive phylogenetic placement of Nostimochelone is difficult to establish because the remains are incompletely preserved. Nevertheless, its discovery is significant because it represents both the first record of a pleurodiran turtle from Greece and also one of only a handful of fossil podocnemidoidean occurrences thus far documented from the Neogene of Europe.

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Une nouvelle espèce de Podocnemis (Pleurodira, Podocnemididae) provenant du Néogène de la formation Solimões, Acre, Brésil

Cited by 24 publications

References 10 publications

The Acre vertebrate fauna: Age, diversity, and geography

The Acre vertebrate fauna: Age, diversity, and geography

Tidal and seasonal controls in the formation of Late Miocene inclined heterolithic stratification deposits, western Amazonian foreland basin

Nostimochelone lampra gen. et sp. nov., an Enigmatic New Podocnemidoidean Turtle from the Early Miocene of Northern Greece

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