Elongated theropod tracks from the Cretaceous Apenninic Carbonate Platform of southern Latium (central Italy

Citton, Paolo; Nicosia, Umberto; Nicolosi, Iacopo; Carluccio, R.; Romano, Marco

doi:10.26879/578

Cited by 9 publications

(14 citation statements)

References 23 publications

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“…The extent of the heel impression can vary not only due to an incomplete impression of the foot, but also due to the additional impression of the metatarsus. Although not preserved in the Münchehagen tracks, metatarsal traces are frequently found in footprints attributed to both theropods and ornithopods, and can be caused either by behavior or sinking depth of the foot into the sediment (e.g., Kuban, 1989 ; Citton et al, 2015 ; Lallensack et al, 2015 ; Pérez-Lorente, 2015 ). Several ichnotaxa are based on material including metatarsal impressions, causing ichnotaxonomical problems (e.g., Díaz-Martínez et al, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

Geometric morphometric analysis of intratrackway variability: a case study on theropod and ornithopod dinosaur trackways from Münchehagen (Lower Cretaceous, Germany)

Lallensack

Heteren

Wings

2016

PeerJ

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A profound understanding of the influence of trackmaker anatomy, foot movements and substrate properties is crucial for any interpretation of fossil tracks. In this case study we analyze variability of footprint shape within one large theropod (T3), one medium-sized theropod (T2) and one ornithopod (I1) trackway from the Lower Cretaceous of Münchehagen (Lower Saxony, Germany) in order to determine the informativeness of individual features and measurements for ichnotaxonomy, trackmaker identification, and the discrimination between left and right footprints. Landmark analysis is employed based on interpretative outline drawings derived from photogrammetric data, allowing for the location of variability within the footprint and the assessment of covariation of separate footprint parts. Objective methods to define the margins of a footprint are tested and shown to be sufficiently accurate to reproduce the most important results. The lateral hypex and the heel are the most variable regions in the two theropod trackways. As indicated by principal component analysis, a posterior shift of the lateral hypex is correlated with an anterior shift of the margin of the heel. This pattern is less pronounced in the ornithopod trackway, indicating that variation patterns can differ in separate trackways. In all trackways, hypices vary independently from each other, suggesting that their relative position a questionable feature for ichnotaxonomic purposes. Most criteria commonly employed to differentiate between left and right footprints assigned to theropods are found to be reasonably reliable. The described ornithopod footprints are asymmetrical, again allowing for a left–right differentiation. Strikingly, 12 out of 19 measured footprints of the T2 trackway are stepped over the trackway midline, rendering the trackway pattern a misleading left–right criterion for this trackway. Traditional measurements were unable to differentiate between the theropod and the ornithopod trackways. Geometric morphometric analysis reveals potential for improvement of existing discriminant methods.

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Section: Discussionmentioning

confidence: 99%

Geometric morphometric analysis of intratrackway variability: a case study on theropod and ornithopod dinosaur trackways from Münchehagen (Lower Cretaceous, Germany)

Lallensack

Heteren

Wings

2016

PeerJ

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“…A three‐dimensional photogrammetric model of the specimen was made using a 24 Megapixel Canon EOS 750D (18 mm focal length). The software used to build a photogrammetric model is Agisoft PhotoScan Pro, already successfully applied both in the geological and palaeontological field (e.g., Breithaupt, Matthews, & Noble, ; Cipriani, Citton, Romano, & Fabbi, ; Citton et al, ; Citton, Nicolosi, Carluccio, & Nicosia, , Citton, Nicosia, Nicolosi, Carluccio, & Romano, ; Díaz‐Martínez, González, & De Valais, ; Fabbi, Romano, Citton, & Cipriani, ; Lomax, Falkingham, Schweigert, & Jiménez, ; Mallison & Wings, ; Pesci et al, ; Petti et al, ; Romano, Brocklehurst, & Fröbisch, ; Romano & Citton, ). A 3D PDF of the obtained model is provided in the Supplementary Information.…”

Section: Methodsmentioning

confidence: 99%

Hybodont dentition from the Upper Jurassic of Monte Nerone Pelagic Carbonate Platform (Umbria‐Marche Apennine, Italy) and its ecological implications

et al. 2018

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Here we describe a number of articulated teeth of a hybodont shark from Upper Jurassic deposits of the Monte Nerone Pelagic Carbonate Platform, in the Umbria‐Marche‐Sabina Palaeogeographic Domain (Northern Apennines, Central Italy). The material has been referred to as Asteracanthus cf. A. magnus, a quite well‐known taxon already reported from Middle to Upper Jurassic deposits of Europe. Teeth indicate an extreme crushing feeding behaviour, suggesting as putative prey both infaunal and epifaunal hard‐shelled invertebrates dwelling the sea‐floor, such as large bivalves, brachiopods, gastropods as well as vagile crustaceans. The finding represents, to date, the first formal report of hybodont shark in the Umbria‐Marche‐Sabina Domain, throwing further light on the ecology within Pelagic Carbonate Platform settings, and on the occurrence of Asteracanthus in the Late Jurassic of the Western Tethys.

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“…This method, whose practice is explained by several papers (e.g., Falkingham, ; Mallison & Wings, ; Petti et al, ), enables preservation and communication more objectively about ichnological data. Its adoption has greatly increased in recent times, becoming almost a standard taking advantage of a protocol for ichnological studies (Falkingham et al, ) and being used as support of different approaches related to ichnological analysis (e.g., Castanera et al, ; Citton, Carluccio, Nicolosi, & Nicosia, ; Citton, Nicolosi, Carluccio, & Nicosia, ; Citton, Nicosia, Nicolosi, Carluccio, & Romano, ; Citton et al, ; Citton, Romano, Salvador, & Avanzini, ; Lallensack, Sander, Knötschke, & Wings, ; McCrea et al, ; Romano & Citton, ). High‐resolution Digital Photogrammetry is based on Structure from Motion (SfM) (Ullman, ) and Multi View Stereo (MVS; Seitz, Curless, Diebel, Scharstein, & Szeliski, ) algorithms and produces high‐quality dense point clouds.…”

Section: Methodsmentioning

confidence: 99%

First tetrapod footprints from the Permian of Sardinia and their palaeontological and stratigraphical significance

Citton

Ronchi

Maganuco³

et al. 2018

Geological Journal

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The Torre del Porticciolo palaeontological locality (Alghero, north‐west Sardinia, Italy) is important for having provided the skeletal remains of the first Permian basal synapsid from Italy, Alierasaurus ronchii, the largest late early Permian to early middle Permian non‐therapsid synapsid known to date. Recently, other skeletal remains preliminarily attributed to a carnivorous non‐therapsid synapsid were described from a second site, approximately from the same stratigraphic level within the Cala del Vino Fm. During the excavation of this second site, tetrapod tracks were found near Cala Viola, about 1 km from the first two sites. The new find represents the first ichnological record from the Permian of Sardinia. The ichnological analysis allowed the recognition of tetrapods presently not recognized, just on the base of skeletal remains. This new evidence sheds more light on the faunal diversity within the Cala del Vino Fm., which is one of the few examples in the Permian of Europe of a combined ichno‐ and body‐fossil record. The tracks have been referred to as Merifontichnus, an ichnotaxon established from the uppermost portion of the Permian succession of the Lodève Basin in southern France. The new material is the first reliable occurrence of this ichnotaxon from Italy and would represent, to date, the oldest occurrence of the ichnogenus.

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Elongated theropod tracks from the Cretaceous Apenninic Carbonate Platform of southern Latium (central Italy

Cited by 9 publications

References 23 publications

Geometric morphometric analysis of intratrackway variability: a case study on theropod and ornithopod dinosaur trackways from Münchehagen (Lower Cretaceous, Germany)

Geometric morphometric analysis of intratrackway variability: a case study on theropod and ornithopod dinosaur trackways from Münchehagen (Lower Cretaceous, Germany)

Hybodont dentition from the Upper Jurassic of Monte Nerone Pelagic Carbonate Platform (Umbria‐Marche Apennine, Italy) and its ecological implications

First tetrapod footprints from the Permian of Sardinia and their palaeontological and stratigraphical significance

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