scholarly journals First record of trace fossils from the Oxfordian Argiles rouges de Kheneg Formation (Tiaret, northwestern Algeria)

2020 ◽  
Vol 73 (2) ◽  
pp. 85-94
Author(s):  
Belaid Mourad ◽  
Amine Cherif ◽  
Olev Vinn ◽  
Mohammed Nadir Naimi
Keyword(s):  
First Record ◽  
Trace Fossils

Spatangoid echinoids from the Eocene of Jamaica

2000 ◽  
Vol 74 (4) ◽  
pp. 654-661 ◽  
Author(s):  
Stephen K. Donovan ◽  
Deborah-Ann C. Rowe
Keyword(s):  
New Species ◽  
First Record ◽  
Trace Fossils ◽  
Upper Eocene ◽  
Area Effects ◽  
Low Diversity ◽  
First Time ◽  
Incomplete Sampling

Paleocene spatangoids are unknown from the Antilles, apart from evidence from trace fossils. The peak of spatangoid diversity was the Eocene. Jamaican Oligo-Miocene spatangoids have a relatively low diversity compared with that of the Antillean region. Plio-Pleistocene spatangoids are poorly known from the Antilles (four genera), in contrast to the Oligo-Miocene (16 genera) and Holocene (17 genera). The depauperate Paleocene and Plio-Pleistocene spatangoid faunas are probably in part artifacts of incomplete sampling, facies-related absences, outcrop area effects and the relative brevity of these stratigraphic intervals.To the large echinoid fauna of the Swanswick Formation (Middle-Upper Eocene) of Jamaica is added the schizasterid Aguayoaster schickleri new species. This is the first record of this genus outside Cuba; it is distinctly more elongate than all other known specimens of this genus. The schizasterid Caribbaster loveni (Cotteau, 1875) is recorded from the Swanswick Formation for the first time, the youngest occurrence of this genus in Jamaica. The coeval Claremont Formation has not previously yielded spatangoid echinoids; the brissid Eupatagus cf. antillarum (Cotteau) from a new locality is the first spatangoid known from a lagoonal unit of the White Limestone Group.

Precambrian—Cambrian boundary and correlation from southwestern and central part of Spain

1984 ◽  
Vol 121 (3) ◽  
pp. 221-228 ◽  
Author(s):  
E. Liñán ◽  
T. Palacios ◽  
A. Perejón
Keyword(s):  
Iberian Peninsula ◽  
Lower Cambrian ◽  
First Record ◽  
Trace Fossils ◽  
Middle Part ◽  
Early Cambrian ◽  
Upper Proterozoic ◽  
Upper Vendian ◽  
General Series ◽  
Calcareous Microfossils

AbstractThis paper comprises the first palaeontological correlation between the Upper Proterozoic–Lower Cambrian Series of Ossa-Morena, Luso-Oriental-Alcúdica and Galaico-Castellana Zones of the Iberian Peninsula.The authors show the palaeontological events on acritarchs, stromatolites, cyanophyta, soft-bodied metazoa, trilobites, archaeocyathans and skeletal microfossils from three representative sequences of the above mentioned zones and discuss the position of the Precambrian–Cambrian boundary in the sequences. The Sierra de Córdoba general Series (Ossa-Morena Zone) has an erosive discontinuity between the rocks with the first record of Cambrian metazoan activity (Skolithos sp., Monomorphichnus sp., Phycodes pedum and Rusophycus sp.) and the rocks with a palynological association (Bavlinella faveolata, Protosphaeridium flexosum, Trachisphaeridium sp., aff. Octoedryxium truncatum, Phycomicetes? sp. and cf. Ooidium sp.) which suggests a Lower–Middle Vendian age. For this reason we suggest that the Precambrian–Cambrian boundary be placed at this unconformity.The upper part of the Sierra de Guadalupe Series (Luso-Oriental-Alcúdica Zone) includes detrital beds with Phycodes pedum, Planolites sp. and Treptichnus sp. which are also the first record of Cambrian metazoan activity. In the middle part of the sequences, acritarchs attributed to the genus Micrhystridium are found at the top of the Calcareous Beds. This is taken to indicate an early Cambrian age. Vendotaenids and Bavlinella faveolata are found in abundance, thus indicating a Late Vendian age for the middle part of this unit. Thus, we propose the Precambrian–Cambrian boundary be located in the upper part of the Calcareous Beds.In the Rio Uso Series (Galaico-Castellana Zone), the Azorejo Sandstones contain Rusophycus gr. radwanskii, Planolites sp. and Gordia sp. Trace fossils produced by trilobite-like arthropoda (Monomorphichnus) have been cited in the upper part of the underlying Pusa Shales. Moreover, Octoedryxium truncatum and Bavlinella faveolata are found in the lower part of this unit which suggest that the Precambrian–Cambrian boundary could be situated in the Pusa Shales.Calcareous microfossils related to annelid polychaetes are found associated with Upper Vendian acritarchs in the Calcareous Beds of Sierra de Guadalupe. They are the oldest record of skeletal metazoa in the Spanish Series.The medusoids found are associated with a Vendian flora and they are also the oldest non-skeletal metazoa record known in the Iberian Peninsula.

First record of herbivory on Lycopodiaceae (Lycopodiales) by a dipteran (Pallopteridae) leaf/stem-miner

2002 ◽  
Vol 134 (5) ◽  
pp. 699-701 ◽  
Author(s):  
Makoto Kato
Keyword(s):  
Adaptive Radiation ◽  
Vascular Plants ◽  
First Record ◽  
Trace Fossils ◽  
Herbivorous Insects ◽  
Herbivore Interactions ◽  
Plant Herbivore

Evidence for herbivory on early vascular plants in the Paleozoic has recently been accumulated from trace fossils and coprolites (Edwards et al. 1995; Labandeira 1998), although it is not well understood which arthropods were true herbivores during the Paleozoic. The great diversity of extant herbivorous insects was thought to have originated in the Cretaceous, when the adaptive radiation of angiosperms occurred; thus, it would be intriguing to find ancient plant–herbivore interactions on extant primeval vascular plants. In this paper, I report a unique dipteran fly associated with a species of the class Lycopsida as the first record of non-lepidopteran herbivory on the extant plant order Lycopodiales.

First record of lobed trace fossils in Brazil's Upper Cretaceous paleosols: Rhizoliths or evidence of insects and their social behavior?

2017 ◽  
Vol 79 ◽  
pp. 364-376 ◽  
Author(s):  
Diego Luciano do Nascimento ◽  
Alessandro Batezelli ◽  
Francisco Sérgio Bernardes Ladeira
Keyword(s):  
Social Behavior ◽  
Upper Cretaceous ◽  
First Record ◽  
Trace Fossils

First record of permian continental trace fossils in the jebilet massif, Morocco

2021 ◽  
Vol 173 ◽  
pp. 104015
Author(s):  
Amal Zouicha ◽  
Sebastian Voigt ◽  
Hafid Saber ◽  
Lorenzo Marchetti ◽  
Abdelkbir Hminna ◽  
...  
Keyword(s):  
First Record ◽  
Trace Fossils

First record of an arthropod from the Passaic Formation (Late Triassic), near Milford, New Jersey

2012 ◽  
Vol 4 (1) ◽  
Author(s):  
Robert Metz
Keyword(s):  
New Jersey ◽  
Shallow Water ◽  
First Record ◽  
Trace Fossils ◽  
Late Triassic ◽  
Desiccation Cracks ◽  
Sedimentary Structures ◽  
Subaerial Exposure

AbstractMudstones of the Triassic Passaic Formation, near Milford, New Jersey, have yielded the first evidence of an arthropod impression in that formation. Associated trace fossils include Helminthoidichnites, Lockeia, Scoyenia, Spongeliomorpha, and the reptile footprint Rhynchosauroides, representing the Scoyenia ichnofacies. Associated sedimentary structures include desiccation cracks and raindrop impressions. The Passaic sediments were deposited under shallow water lacustrine shoreline conditions subject to periodic subaerial exposure.

scholarly journals The swimming trace Undichna from the latest Devonian Hangenberg Sandstone equivalent of Morocco

2021 ◽  
Vol 140 (1) ◽  
Author(s):  
Christian Klug ◽  
Abdelouahed Lagnaoui ◽  
Melina Jobbins ◽  
Wahiba Bel Haouz ◽  
Amine Najih
Keyword(s):  
Body Size ◽  
Black Shale ◽  
Direct Evidence ◽  
First Record ◽  
Trace Fossils ◽  
Systematic Position ◽  
Late Devonian ◽  
Biodiversity Crisis

AbstractTrace fossils occur in several strata of the Devonian and Carboniferous of the eastern Anti-Atlas, but they are still poorly documented. Here, we describe a fossil swimming trace from strata overlying the Hangenberg Black Shale (correlation largely based on lithostratigraphy; Postclymenia ammonoid genozone, ca. 370 Ma old). We discuss the systematic position of the tracemaker and its body size. This ichnofossil is important for three main reasons: (1) it is considered here to be the first record of Undichna from the Devonian of Gondwana, as far as we know; (2) it is the oldest record of vertebrate trace fossils from Africa; (3) it provides a unique window into the behaviour of Late Devonian fishes for which body-fossils cannot provide direct evidence. Further, we put this discovery into the macroecological context of the palaeoenvironment following the Late Devonian Hangenberg biodiversity crisis.

First record of bioeroding barnacles (Cirripedia: Acrothoracica) on ammonite shells

2019 ◽  
Vol 294 (2) ◽  
pp. 143-155
Author(s):  
István Főzy
Keyword(s):  
First Record ◽  
Upper Jurassic ◽  
Trace Fossils ◽  
Living Together ◽  
New Type ◽  
Transdanubian Range

Oval, elongated and radially orientated pits were found on specimens of a Kimmeridgian (Upper Jurassic) aspidoceratid ammonite species from Páskom Hill (Bakony Mountains, Transdanubian Range, Hungary). These trace fossils most probably represent acrothoracica (burrowing barnacles) borings, which have never been documented on ammonites before, and are described here as Paskomella acanthicola nov. igen. et nov. isp. The tiny barnacles were living together with the cephalopods; therefore, these trace fossils represent a new type of commensalism between the ammonites and the boring, host-specific, acrothoracid cirriped.

RETRACTED—Eldonioids with associated trace fossils from the lower Cambrian Emu Bay Shale Konservat-Lagerstätte of South Australia

2017 ◽  
pp. 1-7 ◽  
Author(s):  
Natalie I. Schroeder ◽  
John R. Paterson ◽  
Glenn A. Brock
Keyword(s):  
Lower Cambrian ◽  
South Australia ◽  
Dorsal Surface ◽  
First Record ◽  
Trace Fossils ◽  
The Body ◽  
New Taxon ◽  
Stage 4 ◽  
Secondary Bifurcations ◽  
Body Fossil

Abstract Rare specimens of eldonioids recovered from the lower Cambrian (Series 2, Stage 4) Emu Bay Shale (EBS) Konservat-Lagerstätte represent the first record of the group for the Cambrian of East Gondwana. The disc-shaped body of the EBS taxon bears fine concentric corrugations on the dorsal surface and, ventrally, a series of internal lobes that have primary and secondary bifurcations, as well as a coiled sac. It appears to be most similar to Rotadiscus and Pararotadiscus of the Cambrian Chengjiang and Kaili biotas of South China, respectively. While the structure of the internal lobes would indicate that this occurrence in the EBS represents a new taxon within the Rotadiscidae, lack of detail regarding the precise number of internal lobes and the condition of the circumoral tentacles warrants a more conservative approach in leaving the genus and species under open nomenclature. The EBS specimens also host trace fossils, including the remains of a burrow, which are generally lacking in the body-fossil-bearing layers of the Konservat-Lagerstätte interval. These traces appear to have been made by small organisms and are similar to traces associated with the discs of Pararotadiscus guizhouensis Zhao and Zhu, 1994 from the Kaili Biota. The available taphonomic, paleoenvironmental, and ichnological evidence indicates that the EBS eldonioids are most likely vagrants that were transported or settled into the ‘preservational trap’ and subsequently exposed on the substrate for a brief period before burial, thereby allowing organisms to exploit their carcasses for nutrients or other purposes.

Eldonioids with associated trace fossils from the lower Cambrian Emu Bay Shale Konservat-Lagerstätte of South Australia

2018 ◽  
Vol 92 (1) ◽  
pp. 80-86 ◽  
Author(s):  
Natalie I. Schroeder ◽  
John R. Paterson ◽  
Glenn A. Brock
Keyword(s):  
Lower Cambrian ◽  
South Australia ◽  
Dorsal Surface ◽  
First Record ◽  
Trace Fossils ◽  
The Body ◽  
New Taxon ◽  
Stage 4 ◽  
Secondary Bifurcations ◽  
Body Fossil

AbstractRare specimens of eldonioids recovered from the lower Cambrian (Series 2, Stage 4) Emu Bay Shale (EBS) Konservat-Lagerstätte represent the first record of the group for the Cambrian of East Gondwana. The disc-shaped body of the EBS taxon bears fine concentric corrugations on the dorsal surface and, ventrally, a series of internal lobes that have primary and secondary bifurcations, as well as a coiled sac. It appears to be most similar toRotadiscusandPararotadiscusof the Cambrian Chengjiang and Kaili biotas of South China, respectively. While the structure of the internal lobes would indicate that this occurrence in the EBS represents a new taxon within the Rotadiscidae, lack of detail regarding the precise number of internal lobes and the condition of the circumoral tentacles warrants a more conservative approach in leaving the genus and species under open nomenclature. The EBS specimens also host trace fossils, including the remains of a burrow, which are generally lacking in the body-fossil-bearing layers of the Konservat-Lagerstätte interval. These traces appear to have been made by small organisms and are similar to traces associated with the discs ofPararotadiscus guizhouensis(Zhao and Zhu, 1994) from the Kaili Biota. The available taphonomic, paleoenvironmental, and ichnological evidence indicates that the EBS eldonioids are most likely vagrants that were transported or settled into the ‘preservational trap’ and subsequently exposed on the substrate for a brief period before burial, thereby allowing organisms to exploit their carcasses for nutrients or other purposes.

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