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A dinosaur track assemblage from the Upper Hettangian (Lower Jurassic) marginal-marine deposits of Zapniów, Holy Cross Mountains, Poland

Niedźwiedzki G., Pieńkowski G.

Geological Quarterly

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2016

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Vol. 60, No. 4

840--856

EN

Upper Hettangian (Lower Jurassic) marginal-marine Przysucha Ore-bearing Formation exposed at Zapniów mine and clay-pit (northwestern part of the Holy Cross Mountains area, central Poland) revealed an interesting assemblage of dinosaur tracks. Although mostly yielding poorly preserved and isolated tracks probably left in shallow water conditions, the site nevertheless indicates a diversity of early saurischian (theropods and sauropodomorphs) and ornithischian (thyreophorans) dinosaur trackmakers. This new assemblage is partly consistent with the Lower-Middle Hettangian ichnorecord from the same region. The tracks are preserved in sediments of a barrier-foreshore origin within a barrier/lagoonal depositional system, belonging to the highstand systems tract, located below a marked erosional surface (sequence boundary), which is associated with a substantial fall in sea level at the end of Hettangian times. Here we described all previously and newly collected or observed in the field dinosaur tracks from both surface and underground exposures at Zapniów. Four ichnospecies: Grallator isp., Anchisauripus isp., cf. Tetrasauropus isp., and cf. Anomoepus isp. were identified. The theropod and ornithischian tracks show distinct similarities to those described from the richest in this region and most famous Gliniany Las dinosaur track assemblage, in age approximately coeval to Zapniów. Two sizes of theropod tracks (small and medium) indicate the presence of two different size classes or species of predators in this area. The described cf. Tetrasauropus isp. from Zapniów is the first unquestioned evidence of basal sauropodomorphs in the Upper Hettangian of the Holy Cross Mountains and first record of this ichnotaxa in the Lower Jurassic of Poland. Additionally, two theropod trackways (Anchisauripus isp.) show evidence for trotting. The new finds suggest similarities between marginal-marine environments (delta-plain and foreshore-barrier/lagoon lithofacies) association of dinosaurs containing low-browsing thyreophorans accompanied by small or juvenile sauropodomorphs and small to medium sized theropods. Presence of the ornithischian footprints suggests their prominent role as a major component in Middle-Upper Hettangian dinosaur faunas in marginal-marine environments dominating in the region.

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First report on dinosaur tracks from the Burro Canyon Formation, San Juan County, Utah, USA : evidence of a diverse, hitherto unknown Lower Cretaceous dinosaur fauna

Milàn J., Chiappe L. M., Loope D. B., Kirkland J. I., Lockley M. G.

Annales Societatis Geologorum Poloniae

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2015

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Vol. 85, No. 3

515--525

EN

The newly discovered White Mesa tracksite in the Burro Canyon Formation represents a snapshot of a diverse, Lower Cretaceous dinosaur fauna from south-eastern Utah. The tracks were found at a construction site where the sandstone had been bulldozed and broken up. All tracks were found as deep, well-preserved natural casts on the underside of the sandstone slabs. Individual theropod tracks are 19–57 cm in length; one peculiar track shows evidence of a possible pathological swelling in the middle of digit III and an apparently didactyl track is tentatively assigned to a dromaeosaurid. Individual sauropod tracks are found with pes lengths of 36–72 cm, and interestingly, three distinct shapes of manus tracks, ranging from wide banana shaped to rounded and hoof-like. Ornithopods are represented with individual tracks 18–37 cm in length; a sin gle track can possibly be attributed to the thyreophoran ichnogenus Deltapodus. Zircon U-Pb dating places the track-bearing layer in the Barremian, contemporary to the lower Yellow Cat Member of the Cedar Mountain Formation, which has a similar faunal composition based on both tracks and body fossils. This new track-fauna demonstrates the existence of a diverse dinosaurian assemblage in the lower part of the Burro Canyon Formation, which hitherto is not known to yield skeletalre mains.

3

Tropy dinozaurów z wczesnojurajskiego ekosystemu z Sołtykowa w Górach Świętokrzyskich

Niedźwiedzki G.

Biuletyn Państwowego Instytutu Geologicznego

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2011

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nr 447

49--98

PL

W artykule została przedstawiona rekonstrukcja wczesnojurajskiego zespołu dinozaurów (sprzed około 200 milionów lat) na podstawie danych paleoichnologicznych (skamieniałości śladowych – tropów dinozaurów). W latach 1997–2009 autor zebrał ze stanowiska w Sołtykowie materiał badawczy liczący kilkadziesiąt okazów, wykonał również szereg dokumentacji fotograficznych oraz replik gipsowych (odlewów) z okazów pozostawionych w terenie. Ten materiał to tropy dinozaurów drapieżnych – teropodów oraz roślinożernych zauropodomorfów i wczesnych dinozaurów ptasiomiednicznych. Artykuł zawiera również charakterystykę środowiska abiotycznego oraz innych znalezisk paleontologicznych i paleoichnologicznych (skamieniałości śladowe bezkręgowców). Odsłonięcie Sołtyków reprezentuje unikatowy zapis wczesnojurajskiego ekosystemu lądowego, związanego z rozwojem rzeki anastomozująco-meandrującej oraz przyległych do niej obszarów równi zalewowej. Stanowisko to dostarcza danych paleoichnologicznych użytecznych do określenia różnorodności biologicznej, stanu ewolucyjnego i biologii wczesnych dinozaurów oraz innych ówczesnych kręgowców lądowych (gadów ssakokształtnych wczesnych ssaków, lepidozaurów, pterozaurów i wczesnych krokodylomorfów).

EN

This paper presents reconstruction of the Early Jurassic dinosaurs assemblage (about 200 million years old) based on paleoichnological data (trace fossils – tracks of dinosaurs). In 1997–2009, the author collected paleontological material counting several tens of specimens from the Sołtyków clay-pit and made photographic documentation in the site, as well as replica plaster (casts) from specimens left in the field. This material contains predatory dinosaur tracks and tracks of herbivorous sauropodomorphs and early ornithischia. This publication also includes description of the abiotic environment and other paleontological finds (e.g., insects, bivalves fossils) and paleoichnological finds (invertebrate trace fossils). The Early Jurassic deposits from Sołtyków represent a unique record of an ecosystem of in-land environment connected with the development of an anastomosing-meandering river and adjacent flood plains. This locality provides paleoichnological data valuable for determining biodiversity, evolutionary position and biology of the early dinosaurs and other terrestrial vertebrates (mammal-like reptiles, early mammals, lepidosaurs, pterosaurs and early crocodylomorphs).

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Nowe znaleziska tropów dinozaurów z osadów liasowych Gór Świętokrzyskich

Niedźwiedzki G., Remin Z., Roszkowska J., Meissner U.

Przegląd Geologiczny

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2009

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Vol. 57, nr 3

252-262

EN

New Lower Jurassic material of dinosaur tracks has been found in the coastal siliciclastic and fluvial deposits of the Holy Cross Mountains (HCMts.), Poland. Three poorly preserved specimens of small to medium-sized theropod dinosaur footprints, assigned to cf. Grallator isp. and cf. Anchisauripus isp.,were found in the Sinemurian deposits exposed in the Starachowice outcrop. Sixteen specimens of dinosaur tracks, referred to ichnotaxa cf. Grallator isp., Anchisauripus isp., cf. Kayentapus isp., cf. Moyenisauropus isp., Theropoda indet., and Dinosauria indet., have been found in the upper Hettangian deposits of the Przysucha Ore-Bearing Formation and the Lower Sinemurian Ostrowiec Formation exposed near Żarnów (Paszkowice and Żarnów sites) in the northwestern part of the HCMts. Dinosaur footprints (cf. Anchisauripus isp., cf. Kayentapus isp.; and cf. Moyenisauropus isp.) and non-dinosaur tracks were found at the Bielowice site, known also as Wólka Karwicka near Opoczno. Interesting large ornithischian footprint (cf. Moyenisauropus isp.) and small-medium theropod footprints (Anchisauripus isp.) were found in the Zagaje Formation of Chyby near Mniów. Ornithischian dinosaur tracks similar to Moyenisauropus were also found in Skłoby Formation at Szwarszowice near Ostrowiec Świętokrzyski. The last finds reported herein, the well preserved specimens of Anomoepus, Anchisauripus, Eubrontes and Kayentapus-like footprints, came from the new tracksite of Szydłówek. Tracks made by large theropods (cf. Megalosauripus isp.) and sauropods were also found at this site. The material came from the strata representing a large barrier-lagoon/deltaic sequence. These new finds confirm that the barrier-lagoonal association of theropod dinosaurs of the Lower Jurassic of the HCMts. is characterised by dominance of small and medium-sized forms but contains also prints made by larger animals. The analysis of the Liassic ichnocenosis suggests that Anchisauripus was a facies-independent ichnotaxon. In the Lower Jurassic of Poland this ichnogenus was identified in the fluvial (aluvial-plain), deltaic (delta-plain), and barier-lagoonal deposits.

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A preliminary report on dinosaur track assemblages from the Middle Jurassic of the Imilchil area, Morocco

Gierliński G. D., Menducki P., Janiszewska K., Wicik I., Boczarowski A.

Geological Quarterly

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2009

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Vol. 53, No 4

477-482

EN

Dinosaur tracks are reported from three new localities near Imilchil, in the Central High Atlas of Morocco. New dinosaur track assemblages are recognized in Bathonian and Bajocian beds. The Bathonian track assemblage comprises theropod, sauropod and ornithopod footprints. The Bajocian deposits contain a sauropod-thyreophoran track assemblage.

6

Tropy wielkich teropodów z osadów górnego pliensbachu Gór Świętokrzyskich

Niedźwiedzki G., Remin Z.

Przegląd Geologiczny

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2008

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Vol. 56, nr 9

823-823

EN

New gigantic theropod dinosaur footprints were discovered in the upper Pliensbachian deposits of the Holy Cross Mountains (Poland). This discovery provides new ichnological evidence for the global occurrence of gigantic predatory dinosaurs in the earliest Jurassic time. Interestingly, this is the third find of gigantic theropod ichnites in the Lower Jurassic of Poland. The first record of gigantic tracks from this area came from the well-known lower Hettangian tracksite in Sołtyków. New finds from the Szydłówek quarry were discovered in siliciclastic strata, which are interpreted as nearshore, shoreface and marginal marine. Hitherto, five isolated specimens of gigantic theropod footprints (40–60 cm long) were found in this tracksite. Another large theropod footprints (30–40 cm) identified at Szydłówek, resemble classic theropod ichnotaxa of the Newark Supergroup (i.e., Eubrontes). Intriguing gigantic theropod ichnites from the Holy Cross Mountains are more similar to large prints left byMiddle and Late Jurassic theropods than to those from the Early Jurassic. These footprints seem even larger because of their large metatarsophalangeal area. Relatively large metatarsophalangeal area is often observed in the large theropod footprints from the post-Liassic strata. New paleoichnological finds from Poland suggest rapid increase of predatory dinosaur body size in Early Jurassic time.

7

Ślady dinozaurów drapieżnych z osadów retyku w Seebergen (Turyngia, Niemcy)

Niedźwiedzki G.

Przegląd Geologiczny

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2008

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Vol. 56, nr 7

539-539

EN

Four ichnotypes of theropod dinosaur tracks (described in this paper as cf. Grallator isp., Anchisauripus isp., cf. Eubrontes isp., and Theropoda indet.) were identified in the middle-upper Rhaetian deposits exposed in the Seebergen quarry located near Kammerbruch in the Thuringia Basin, Central Germany. This new paleoichnological find is very important for understanding of diversity and composition of the latest Triassic (Rhaetian) vertebrate assemblages (especially dinosaur assemblages), what is essential for studies on the Late Triassic and Early Jurassic faunal change.

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A dinosaur track association from the Early Jurassic deltaic deposits of Podole near Opatów, Poland

Niedźwiedzki G., Pieńkowski G.

Geological Quarterly

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2004

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Vol. 48, No 4

333--338

EN

Middle Hettangian (Early Jurassic) deltaic deposits of the Skłoby Formation exposed at Podole near Opatów (eastern part of the Holy Cross Mts. area, Central Poland) revealed new specimens of dinosaur tracks. Four ichnospecies: Anchisauripus sp., Kayentapus sp., Parabrontopodus sp., and cf. Anomoepus sp.were identified. The new finds suggest that the deltaic (delta-plain) association of dinosaurs is characterised by dominance of low-browsing thyreophorans accompanied by juvenile sauropods and medium- to large sized theropods.