干旱区生态环境知识资源中心(Arid): A new insect trackway from the Upper Jurassic-Lower Cretaceous eolian sandstones of Sao Paulo State, Brazil: implications for reconstructing desert paleoecology

Arid

DOI	10.7717/peerj.8880
	A new insect trackway from the Upper Jurassic-Lower Cretaceous eolian sandstones of Sao Paulo State, Brazil: implications for reconstructing desert paleoecology
	Peixoto, Bernardo de C. P. e M.1,2; Mangano, M. Gabriela 3; Minter, Nicholas J.4; dos Reis Fernandes, Luciana Bueno 1; Fernandes, Marcelo Adorna 1,2
通讯作者	Peixoto, Bernardo de C. P. e M.
来源期刊	PEERJ
ISSN	2167-8359
出版年	2020
卷号	8
英文摘要	The new ichnospecies Paleohelcura araraquarensis isp. nov. is described from the Upper Jurassic-Lower Cretaceous Botucatu Formation of Brazil. This formation records a gigantic eolian sand sea (erg), formed under an arid climate in the south-central part of Gondwana. This trackway is composed of two track rows, whose internal width is less than one-quarter of the external width, with alternating to staggered series, consisting of three elliptical tracks that can vary from slightly elongated to tapered or circular. The trackways were found in yellowish/reddish sandstone in a quarry in the Araraquara municipality, Sao Paulo State. Comparisons with neoichnological studies and morphological inferences indicate that the producer of Paleohelcura araraquarensis isp. nov. was most likely a pterygote insect, and so could have fulfilled one of the ecological roles that different species of this group are capable of performing in dune deserts. The producer could have had a herbivorous or carnivorous diet or been part of the fauna of omnivores, being able to adopt herbivorous, carnivorous, and saprophagous diets when necessary. In modern dune deserts, some species of pterygote insects are detritivores (like Tenebrionidae), relying on organic matter that accumulated among the sand grains of the dunes during dry periods with no plant growth. The presence of additional burrows suggests that the Botucatu paleodesert would have had a detritivorous fauna like this. Based on the interpretation of the ichnofossil producers, it was possible to reconstruct the food web of this paleodesert. All the omnivorous and herbivorous invertebrates and the herbivorous ornithopod dinosaurs made up the primary consumers. These animals were, in turn, the food source for bigger carnivorous or omnivorous animals unable to feed on detritus, like arachnids, possible predatory insects, mammaliaforms, and theropod dinosaurs. The highest trophic level was occupied by larger theropod dinosaurs and mammaliaforms, which, because of their size, could prey upon a wide range of animals. The producer of Paleohelcura araraquarensis isp. nov. could have been a primary consumer if it were an omnivorous detritivore or a herbivore, or a secondary consumer if it were produced by a predatory insect or an omnivore relying on animal biomass. The description of this new trackway expands the knowledge on the faunal composition of the Botucatu paleodesert and provides insights into the ecological relationships in ancient deserts. The presence of these arthropod trackways in Mesozoic eolian deposits helps to trace a continuity between Paleozoic and post-Paleozoic desert ichnofaunas, further reinforcing a single Octopodichnus-Entradichnus Ichnofacies for eolian deposits.
英文关键词	Deserts Erg Palaeoecology Trophic web Gondwana Ichnofacies Botucatu Formation Parana Basin
类型	Article
语种	英语
国家	Brazil ; Canada ; England
开放获取类型	Green Submitted, Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000535145500003
WOS关键词	FOSSIL VERTEBRATE FOOTPRINTS ; OLD RED SANDSTONE ; BOTUCATU FORMATION ; TRACE FOSSILS ; PARANA BASIN ; NORTHERN ARIZONA ; UNDERWATER ORIGIN ; LAVA FLOWS ; TETRAPOD ICHNOTAXONOMY ; ATTACHMENT PADS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319161
作者单位	1.Univ Fed Sao Carlos UFSCar, Dept Ecol & Biol Evolut, Lab Paleoicnol & Paleoecol, Sao Carlos, SP, Brazil; 2.Univ Fed Sao Carlos UFSCar, Ctr Ciencias Biol & Saude, Programa Pos Grad Ecol & Recursos Nat, Sao Carlos, SP, Brazil; 3.Univ Saskatchewan, Dept Geol Sci, Saskatoon, SK, Canada; 4.Univ Portsmouth, Sch Environm Geog & Geosci, Portsmouth, Hants, England
推荐引用方式 GB/T 7714	Peixoto, Bernardo de C. P. e M.,Mangano, M. Gabriela,Minter, Nicholas J.,et al. A new insect trackway from the Upper Jurassic-Lower Cretaceous eolian sandstones of Sao Paulo State, Brazil: implications for reconstructing desert paleoecology[J],2020,8.
APA	Peixoto, Bernardo de C. P. e M.,Mangano, M. Gabriela,Minter, Nicholas J.,dos Reis Fernandes, Luciana Bueno,&Fernandes, Marcelo Adorna.(2020).A new insect trackway from the Upper Jurassic-Lower Cretaceous eolian sandstones of Sao Paulo State, Brazil: implications for reconstructing desert paleoecology.PEERJ,8.
MLA	Peixoto, Bernardo de C. P. e M.,et al."A new insect trackway from the Upper Jurassic-Lower Cretaceous eolian sandstones of Sao Paulo State, Brazil: implications for reconstructing desert paleoecology".PEERJ 8(2020).