Re: [dinosaur] Polyonyx-like sauropod tracks from Jurassic red beds of Morocco

Pedro,
Este também, por favor.
abraços,
ismar

Em qua, 16 de out de 2019 às 00:31, Ben Creisler <[email protected]>
escreveu:

>
> Ben Creisler
> [email protected]
>
>
> A new paper:
>
>
> Mostafa Oukassou,Hendrik Klein, Abdelouahed Lagnaoui, André Charrière,
> Hafid Saber, Gerard D. Gierliński, Jens N. Lallensack, Abdelkbir Hminna,
> Ayoub Boumaalif, Ahmed Oussou & Driss Ouarhache (2019)
> Polyonyx-like tracks from Middle-?Upper Jurassic red beds of Morocco:
> implications for sauropod communities on southern margins of Tethys.
> Palaeogeography, Palaeoclimatology, Palaeoecology (advance online
> publication)
> https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1016_j.palaeo.2019.109394&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=0Ouehfb_UVEyFk-IrK8uVTF87Fk0a-tRU0lPY85XMY8&s=YsB4VM22fKMK6VxAxgKZ2RF2aPTDfcJkNllboikl7fA&e= 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1016_j.palaeo.2019.109394&d=DwMFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=raPMFJHaQ9ysCDLlg5C5_ZGqS9pfK1Qh2B2JTg7OHWI&s=oxpu-8nIRonBKEiHPV0dqW-04IxR2Ey3-LUvDiQ2i2g&e=>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.sciencedirect.com_science_article_abs_pii_S0031018219306145&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=0Ouehfb_UVEyFk-IrK8uVTF87Fk0a-tRU0lPY85XMY8&s=kQoMC63vGZ1nW-uQIEYYif0OpEPKkZjD2tg5keCyc44&e= 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.sciencedirect.com_science_article_abs_pii_S0031018219306145&d=DwMFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=raPMFJHaQ9ysCDLlg5C5_ZGqS9pfK1Qh2B2JTg7OHWI&s=jhgYGUfExkMUB7fzrBpofv5NaI2rC5WKngJ4PIy7Lwo&e=>
>
> Highlights
>
> Diverse dinosaur-dominated ichnofauna are reported from Jurassic red beds
> at Imilchil, Morocco.
> We describe, in detail, a long sauropod trackway of Polyonyx type.
> Ichnotaxonomy of Middle Jurassic-Early Cretaceous sauropod tracks is
> reviewed.
> Findings improve knowledge of sauropods along the southern margin of the
> Tethys.
>
> Abstract
>
> A new dinosaur tracksite is reported from continental red beds of the
> Jurassic (Late Bathonian-?Callovian) Isli Formation along the northern
> flank of the Aït Ali ou Ikkou Syncline of the Imilchil area, Central High
> Atlas, Morocco. The succession was deposited in a fluvio-lacustrine
> environment, and contains at least fourteen track-bearing levels. The
> diverse dinosaur-dominated ichnofauna includes the footprints of
> crocodylomorphs, pterosaurs, theropods, sauropods and ornithischians,
> together with numerous invertebrate traces. Here, we focus on a long
> sauropod trackway, which comprises nine consecutive manus-pes sets
> preserved as concave epireliefs. The low heteropody and asymmetry of manus
> prints with a large digit I (pollex) impression oriented medially, and a
> large triangular claw trace, which is posteriorly oriented, are
> characteristic of the ichnogenus Polyonyx. Different from typical Polyonyx
> is the narrow gauge pattern compared to the wide gauge observed in the type
> trackway from Portugal. Additional material from Morocco, similar to
> Polyonyx, comprises the trackway of a very small (?juvenile) individual
> found close to the main trackway, as well as a short trackway from a
> different locality in the Isli Formation. Our data from the Moroccan High
> Atlas indicates the presence of basal eusauropods in the Middle
> Jurassic-Early Cretaceous interval in the northwestern part of Gondwana for
> the first time, and suggests they inhabited a lacustrine paleoenvironment.
>
>
>
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