Geomuseum Faxe OStsjaellands Museum

Fakse, Denmark

Geomuseum Faxe OStsjaellands Museum

Fakse, Denmark
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Vallon L.H.,Geomuseum Faxe Ostsjaellands Museum | Rindsberg A.K.,University of West Alabama | Bromley R.G.,Ronnevej 97
Geodinamica Acta | Year: 2015

During the last few decades, many new ethological categories for trace fossils have been proposed in addition to the original five given by Seilacher. In this article, we review these new groups and present a version of the scheme of fossil animal behaviour originally published by Bromley updated with regard to modern ethological concepts, especially those of Tinbergen. Because some behaviours are more common in certain environments than others, they are useful in palaeoecological reconstructions, forming the original basis of the ichnofacies concept. To simplify, we summarise some ethological categories as previously done by others. However, the tracemaker’s behaviour in some cases is so distinctive that subcategories should be employed, especially in ecological interpretations of certain environments where a special behaviour may be dominant. © 2015 Taylor & Francis

Milan J.,Geomuseum Faxe Ostsjaellands Museum | Surlyk F.,Copenhagen University
Lethaia | Year: 2015

A well-preserved three-toed footprint, measuring 34mm in length from a very small predatory dinosaur with an estimated hip height of 153mm and a total body length around 50cm including tail, is reported from the type section of the marine Lower Jurassic (Pliensbachian), Hasle Formation on the Danish island of Bornholm in the Baltic Sea. The morphology of the footprint is similar to the ichnogenus Stenonyx Lull 1904 from the contemporaneous Pliensbachian Szydlowek site in Poland. Apart from the Polish material, footprints from diminutive dinosaurs are rare and reported from few other localities around the world. The occurrence of a diminutive dinosaur footprint in a shallow marine sandstone is enigmatic. The well-defined morphology of the footprint, together with the very small size of the trackmaker, excludes the possibility that the track was emplaced by a swimming or wading animal. At the type locality where the footprint was found the formation consists of ferruginous coarse siltstone and very fine-grained sandstone, showing hummocky and swaley cross-stratification and rare large-scale trough cross-bedding and planar lamination. Deposition took place mainly in the upper shoreface in a storm-dominated environment 1km west of the N-S-oriented faulted coastline. The formation becomes thinner and finer grained with heterolithic intercalations towards the south, indicating coast-parallel transport in this direction. The extreme uniformity in sedimentary facies as seen in two nearby fully cored boreholes shows that the accommodation space created by rapid subsidence along the fault was continuously filled in to upper shoreface level by rapid longshore sediment influx from the north. In quiet periods with easterly winds and extreme low-water low tide, the small dinosaur creating the newly found footprint is interpreted to have walked in shallow beach pools, thus explaining the strange occurrence of the footprint in a marine deposit. © 2015 The Lethaia Foundation.

Vallon L.H.,Geomuseum Faxe OStsjaellands Museum | Kjeldahl-Vallon T.A.,Geomuseum Faxe OStsjaellands Museum
Neues Jahrbuch fur Geologie und Palaontologie - Abhandlungen | Year: 2011

A muroidean burrow excavated in snow is described. Its mode of excavation as well as its function are discussed. In all probability the burrow has to be interpreted as an equilibrichnium. The above-surface burrow-extension in snow most likely conduces to a better ventilation within the permanent, subterraneous burrow part. Due to the morphological similarity of the described burrow with the ichnogenus Spongeliomorpha DE SAPORTA, 1887 the ichnotaxonomical validity of the ichnogenus Alezichnos GOBETZ, 2006 is discussed, which was erected for vertebrate burrows. The morphological characteristics of Alezichnos do not justify the erection of a new ichnogenus. Alezichnos has therefore to be regarded as a junior synonym of Spongeliomorpha. © 2011 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany.

Vallon L.H.,Geomuseum Faxe Ostsjaellands Museum | Schweigert G.,Staatliches Museum fur Naturkunde | Bromley R.G.,Ronnevej 97 | Roper M.,Burgermeister Muller Museum Solnhofen | Ebert M.,Jura Museum Eichstatt
Annales Societatis Geologorum Poloniae | Year: 2015

The shedding of exoskeletons is an important aspect of the lifecycle of some invertebrates (mainly arthropods). To rid themselves of the old cuticula (= exuvia), these animals often have to thrash about, twist around or rub themselves against the sediment or other more or less solid objects. In softgrounds, this behaviour may create distinctive patterns that have to be regarded as trace fossils. Accordingly, some ichnospecies of Rusophycus have recently been interpreted as traces made during ecdysis. Most of the so-called “Schwoimarken” from the Solnhofen lithographic limestones (Upper Jurassic, SE Germany), usually interpreted as structures made by dead organisms swaying in response to water movements, must be understood as traces of arthropod ecdysis. In this context, we erect Harpichnus bartheli igen. et isp. nov. and propose the new ethological category, ecdysichnia, for moulting traces. In most “Schwoimarken” containing body-fossil remains other than arthropods, we see sediment displacement by scavenging arthropods rather than mortichnia (sensu Seilacher, 2007). We further propose inclusion of the recently erected category pupichnia for pupation chambers as a subcategory of ecdysichnia. In our opinion, pupation is a special form of moulting that does not justify the splitting of categories, as briefly noted by Vallon et al. (2013). © 2015, Geological Society of Poland. All rights reserved.

Rasser M.W.,Staatliches Museum fur Naturkunde | Vallon L.H.,Geomuseum Faxe Ostsjaellands Museum | Salvador R.B.,Staatliches Museum fur Naturkunde | Salvador R.B.,University of Tübingen
Ichnos:an International Journal of Plant and Animal | Year: 2016

Formerly unknown holes in shells of freshwater gastropods are described and assigned to the ichnogenus Nihilichnus. The smaller size range, the different substrate, and the sometimes present scratchings around the holes distinguish our praedichnion from the type ichnospecies N. nihilicus, and we propose N. covichi n. isp. for the herein presented material. The type material of N. covichi n. isp. derives from the middle Miocene (Mammal Neogene zones MN6 and MN7) lake sediments of the Steinheim Basin (Steinheim am Albuch, SW Germany); the holes occur in shells of Gyraulus trochiformis (Planorbidae) and Bania pseudoglobulus (Hydrobiidae). Further material consists of perforated shells of Nematurella bavarica (Hydrobiidae) and Galba armaniacensis (Lymnaeidae) from the early Miocene Kirchberg Formation (MN 4; SE Germany). In contrast to the other morphologically similar but marine praedichnia (e.g., Belichnus and Oichnus, recently synonymized with Sedilichnus), Nihilichnus is known from terrestrial, palustrine, freshwater (reported herein), and marine environments. Nihilichnus covichi n. isp. was probably produced by the pharyngeal teeth of durophagous tench fish (Tinca spp.; Cyprinidae). © 2016 Taylor & Francis Group, LLC.

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