On the piscivorous behaviour of the Early Cretaceous amiiform neopterygian fish Calamopleurus cylindricus from the Santana Formation, northeast Brazil

2013 ◽  
Vol 92 (2-3) ◽  
pp. 119-122 ◽  
Author(s):  
E.W.A. Mulder
Keyword(s):  
Early Cretaceous ◽  
Stomach Content ◽  
Prey Preference ◽  
Northeast Brazil ◽  
Santana Formation ◽  
Prey Items

AbstractA specimen of the Early Cretaceous amiiform fish Calamopleurus cylindricus with stomach content is described from the Santana Formation, Brazil. The prey concerns a smaller conspecific individual. Until now, prey items documented for Calamopleurus almost exclusively involved the aspidorhynchid Vinctifer. On the basis of the present record it is suggested that the prey preference of Calamopleurus was less pronounced than previously assumed.

The Orthoptera (Ensifera) from the Santana formation (Early Cretaceous, Northeast Brazil): A statistical and paleoecological approach, with description of new taxa

Zootaxa ◽  
2009 ◽  
Vol 2080 (1) ◽  
pp. 21-37 ◽  
Author(s):  
RAFAEL GIOIA MARTINS-NETO ◽  
LARA VAZ TASSI
Keyword(s):  
New Taxa ◽  
Early Cretaceous ◽  
Statistical Approach ◽  
Northeast Brazil ◽  
Crato Member ◽  
Santana Formation

This paper on the Araripe orthopterofauna reviews the Cearagryllus-like Grylloidea (Orthoptera: Ensifera) from the laminated limestone of the uppermost part of the Crato Member, lowest unit of the Santana Formation (Early Cretaceous), Araripe Basin, near Santana do Cariri and Nova Olinda municipalities (Ceará State, Northeast Brazil). The following new taxa are proposed: Notocearagryllus arturandradai n. sp., Cryptocearagryllus revelatus n. gen. et n. comb., Allocearagryllus leipnitzi n. gen et n. comb., Cearagrylloides perforatorius n. gen. et n. comb., Cearagrylloides microcephalus n. gen. et n. comb., Cearagrylloides previstus n. gen. et n. comb., and Paracearagryllus poliacanthus n. gen. et n. comb. (Cearagryllinae n. subfam.). Additionally new data on the paleoecology and paleoethology are furnished as well as a statistical approach.

Depositional controls on lacustrine coquinas from an early cretaceous rift lake: Morro do Chaves Formation, Northeast Brazil

2021 ◽  
Vol 124 ◽  
pp. 104852
Author(s):  
Julia Favoreto ◽  
Bruno Valle ◽  
Leonardo Borghi ◽  
Patrick Führ Dal’ Bó ◽  
Marcelo Mendes ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northeast Brazil ◽  
Rift Lake ◽  
Depositional Controls

scholarly journals Evidence of Predation on Nestling Birds by Eastern Gartersnakes (Thamnophis sirtalis sirtalis)

2016 ◽  
Vol 130 (2) ◽  
pp. 146 ◽  
Author(s):  
William D. Halliday
Keyword(s):  
Natural History ◽  
Food Choice ◽  
Prey Availability ◽  
Prey Preference ◽  
Thamnophis Sirtalis ◽  
Space And Time ◽  
History Of ◽  
The Common ◽  
Prey Items

Diet is an important aspect of the natural history of all animals, but diet can vary through space and time because of variations in prey availability. The diet of the Common Gartersnake (Thamnophis sirtalis) consists mainly of earthworms and frogs, but other prey items might be important when they are locally abundant. I report an observation of a female Eastern Gartersnake (Thamnophis sirtalis sirtalis) regurgitating 2 nestling birds in Ottawa, Ontario, Canada. Birds are seldom present in the diet of the Common Gartersnake. This rare food choice highlights the opportunistic nature of foraging by adult Common Gartersnakes and, further, demonstrates that diet depends not only on prey preference, but also on prey availability.

scholarly journals A new compilation of stomach content data for commercially-important pelagic fish species in the Northeast Atlantic

2014 ◽  
Vol 7 (1) ◽  
pp. 197-223 ◽  
Author(s):  
J. K. Pinnegar ◽  
N. Goñi ◽  
V. M. Trenkel ◽  
H. Arrizabalaga ◽  
W. Melle ◽  
...  
Keyword(s):  
Fish Species ◽  
North Atlantic ◽  
Stomach Content ◽  
Pelagic Fish ◽  
Bay Of Biscay ◽  
Predator Prey ◽  
Blue Whiting ◽  
The North ◽  
The North Atlantic ◽  
Prey Items

Abstract. There is increasing demand for information on predator-prey interactions in the ocean as a result of legislative commitments aimed at achieving sustainable exploitation. However, comprehensive datasets are lacking for many fish species and this has hampered development of multispecies fisheries models and the formulation of effective food-web indicators. This work describes a new compilation of stomach content data for five pelagic fish species (herring, blue whiting, mackerel, albacore and bluefin tuna) sampled across the northeast Atlantic and submitted to the PANGAEA open-access data portal (www.pangaea.de). We provide detailed descriptions of sample origin and of the corresponding database structures. We describe the main results in terms of diet composition and predator–prey relationships. The feeding preferences of small pelagic fish (herring, blue whiting, mackerel) were sampled over a very broad geographic area within the North Atlantic basin, from Greenland in the west, to the Lofoten Islands in the east and from the Bay of Biscay northwards to the Arctic. This analysis revealed significant differences in the prey items selected in different parts of the region at different times of year. Tunas (albacore and bluefin) were sampled in the Bay of Biscay and Celtic Sea. Dominant prey items for these species varied by location, year and season. This data compilation exercise represents one of the largest and most wide-ranging ever attempted for pelagic fish in the north Atlantic. The earliest data included in the database were collected in 1864, whereas the most recent were collected in 2012.Datasets are available at doi:10.1594/PANGAEA.820041 and doi:10.1594/PANGAEA.826992.

scholarly journals New occurrences of fossilized feathers: systematics and taphonomy of the Santana Formation of the Araripe Basin (Cretaceous), NE, Brazil

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1916 ◽  
Author(s):  
Gustavo M.E.M. Prado ◽  
Luiz Eduardo Anelli ◽  
Setembrino Petri ◽  
Guilherme Raffaeli Romero
Keyword(s):  
Sample Size ◽  
Early Cretaceous ◽  
Fossil Record ◽  
Small Sample Size ◽  
Small Sample ◽  
Exceptional Preservation ◽  
The World ◽  
Crato Member ◽  
Santana Formation ◽  
New Occurrences

Here we describe three fossil feathers from the Early Cretaceous Santana Formation of the Araripe Basin, Brazil. Feathers are the most complex multiform vertebrate integuments; they perform different functions, occurring in both avian and non-avian dinosaurs. Despite their rarity, fossil feathers have been found across the world. Most of the Brazilian feather fossil record comes from the Santana Formation. This formation is composed of two members: Crato (lake) and Romualdo (lagoon); both of which are predominantly reduced deposits, precluding bottom dwelling organisms, resulting in exceptional preservation of the fossils. Despite arid and hot conditions during the Cretaceous, life teemed in the adjacency of this paleolake. Feathered non-avian dinosaurs have not yet been described from the Crato Member, even though there are suggestions of their presence in nearby basins. Our description of the three feathers from the Crato laminated limestone reveals that, despite the small sample size, they can be referred to coelurosaurian theropods. Moreover, based on comparisons with extant feather morphotypes they can be identified as one contour feather and two downy feathers. Despite their rareness and low taxonomic potential, fossilized feathers can offer insights about the paleobiology of its owners and the paleoecology of the Araripe Basin.

scholarly journals New marine data and age accuracy of the Romualdo Formation, Araripe Basin, Brazil

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Robbyson Mendes Melo ◽  
Juliana Guzmán ◽  
Débora Almeida-Lima ◽  
Enelise Katia Piovesan ◽  
Virgínio Henrique de Miranda Lopes Neumann ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northeast Brazil ◽  
Planktic Foraminifera ◽  
Facies Associations ◽  
Marine Data

Abstract A combined biostratigraphic and palaeoecological study of foraminifera, ostracodes and microfacies was carried out on the Aptian in the Sítio Sobradinho section of the Araripe Basin, northeast Brazil. The analysed section represents a deepening-upward sequence with mid-ramp shoal and outer ramp to basin facies associations on a mixed siliciclastic-carbonate marine ramp. The analysed rocks are dominated by Early Cretaceous planktic foraminifera (Hedbergella aptiana, H. praelippa, H. sigali, Blesfucuiana cf. cumulus, Microhedbergella miniglobularis, Gorbachikella cf. kugleri, Pseudoguembelitria blakenosensis, Globigerinelloides clavatus, Globigerinelloides aff. aptiensis, Gubkinella sp. and Loeblichella sp.). Ostracoda fauna is composed mainly of Pattersoncypris crepata and Pattersoncypris micropapillosa. The occurrence of P. crepata associated with the Aptian planktic foraminifera demonstrates the potential of this ostracode species to date this interval. The planktic foraminifera from the upper Aptian (Microhedbergella miniglobularis Zone) of the Araripe Basin show characteristical Tethyan affinities.

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