Provenance of detrital zircons of the canindé group (Parnaíba basin), northeastern Brazil

2019 ◽  
Vol 90 ◽  
pp. 162-180
Author(s):  
Camila Vilar de Oliveira ◽  
CandidoA.V. Moura
Keyword(s):  
Detrital Zircons ◽  
Northeastern Brazil ◽  
Parnaíba Basin

A new species of Characidium (Characiformes: Crenuchidae) from the rio Parnaíba basin, northeastern Brazil

Zootaxa ◽  
2018 ◽  
Vol 4514 (1) ◽  
pp. 77 ◽  
Author(s):  
ANGELA M. ZANATA ◽  
TELTON P. A. RAMOS ◽  
LEONARDO OLIVEIRA-SILVA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Northeastern Brazil ◽  
Caudal Peduncle ◽  
Adipose Fin ◽  
Vertical Bars ◽  
A New Species ◽  
Parnaíba Basin

Characidium tapuia, a new species apparently endemic to the rio Parnaíba basin, Brazil, is described. The new species is easily distinguished from congeners, except C. lanei, C. nana, and C. samurai, by having a broad and conspicuous dark lateral stripe, extending from the tip of snout to the end of caudal peduncle and by the absence of dark vertical bars on body of specimens larger than 23.0 mm SL. Characidium tapuia differs from the aforementioned species by a series of features, including 12 circumpeduncular scales (vs. 13 or 14 in C. lanei and C. samurai), presence of parietal branch of the supraorbital canal (vs. absence in C. lanei and C. nana), complete lateral line and adipose fin present (vs. lateral line incomplete and adipose fin absent in C. nana), and midlateral stripe with irregular borders (vs. lateral stripe with overall straight borders in C. samurai). 

scholarly journals A new species of armored catfish Parotocinclus (Siluriformes: Loricariidae) from the rio Parnaíba basin, northeastern, Brazil

2017 ◽  
Vol 15 (2) ◽  
Author(s):  
Telton P. A. Ramos ◽  
Sergio M. Q. Lima ◽  
Robson T. da Costa Ramos
Keyword(s):  
New Species ◽  
Northeastern Brazil ◽  
Southeastern Brazil ◽  
Undescribed Species ◽  
Mato Grosso ◽  
Northern Brazil ◽  
Adipose Fin ◽  
Taxonomic Studies ◽  
A New Species ◽  
Parnaíba Basin

ABSTRACT Recent taxonomic studies indicated the presence of several undescribed species in the rio Parnaíba basin. Among those, a new species of Parotocinclus endemic of this drainage is herein described. It differs from most of its congeners, including the sympatric P. haroldoi and P. cearensis, by a vestigial or rudimentary adipose fin (vs. conspicuous adipose fin). This character is also present in P. bidentatus and P. muriaensis (both from the rio Paraíba do Sul basin, southeastern Brazil), P. spilurus (rio Jaguaribe basin, northeastern Brazil), P. seridoensis (rio Piranhas-Açu basin, northeastern Brazil), P. halbothi (rios Trombetas and Marowijne basins, northern Brazil and Suriname) and P. dani (from rio Tapajós in Mato Grosso State, Brazil). The new species differs from these latter species mainly by the abdomen extensively covered by broad dermal plates. It also differs from P. haroldoi and P. cearensis by light bands between the snout tip and the nostrils.

scholarly journals New plant fossils from the Lower Cretaceous of the Parnaíba Basin, Northeastern Brazil: Southern Laurasia links

2018 ◽  
Vol 48 (1) ◽  
pp. 127-145 ◽  
Author(s):  
Rafael Matos Lindoso ◽  
Tânia Lindner Dutra ◽  
Ismar de Souza Carvalho ◽  
Manuel Alfredo Medeiros
Keyword(s):  
Lower Cretaceous ◽  
Northeastern Brazil ◽  
Plant Fossils ◽  
Parnaíba Basin

New gymnospermous woods from the Permian of the Parnaíba Basin, Northeastern Brazil, Part I: Ductoabietoxylon, Scleroabietoxylon and Parnaiboxylon

2013 ◽  
Vol 195 ◽  
pp. 37-49 ◽  
Author(s):  
Francine Kurzawe ◽  
Roberto Iannuzzi ◽  
Sheila Merlotti ◽  
Ronny Röβler ◽  
Robert Noll
Keyword(s):  
Northeastern Brazil ◽  
Parnaíba Basin

scholarly journals An isopod from the Codó Formation (Aptian of the Parnaíba Basin), Northeastern Brazil

2013 ◽  
Vol 43 (1) ◽  
pp. 16-21 ◽  
Author(s):  
Rafael Matos Lindoso ◽  
Ismar de Souza Carvalho ◽  
Ighor Dienes Mendes
Keyword(s):  
Northeastern Brazil ◽  
Parnaíba Basin

scholarly journals Cranial anatomy of the predatory actinopterygian Brazilichthys macrognathus from the Permian (Cisuralian) Pedra de Fogo Formation, Parnaíba Basin, Brazil

2019 ◽  
Author(s):  
Rodrigo T. Figueroa ◽  
Matt Friedman ◽  
Valéria Gallo
Keyword(s):  
Original Description ◽  
Northeastern Brazil ◽  
Maximum Parsimony Analysis ◽  
Parsimony Analysis ◽  
X Ray ◽  
Close Relationship ◽  
Computed Microtomography ◽  
X Ray Computed ◽  
Phylogenetic Affinities ◽  
Parnaíba Basin

ABSTRACTBrazilichthys macrognathus is the only named actinopterygian from the Permain (Cisuralian) Pedra de Fogo Formation of northeastern Brazil, where it is represented by a single three-dimensionally preserved but incompletely described skull of unclear systematic placement. We used X-ray computed microtomography (μ-CT) to better document its anatomy and phylogenetic affinities. μ-CT reveals parts of the internal skeleton. We correct errors in original description, including the number of infraorbital bones and the misidentification of the dermosphenotic as sclerotic ossifications. These reinterpretations of external anatomy are joined by new data on internal structure, including the palate, parasphenoid, and branchial and hyoid arches. A maximum parsimony analysis of anatomical data resolves Brazilichthys as a stem actinopterygian, crownward of all Devonian species. This placement is supported by the absence of a dermosphenotic posterior ramus and the presence of opercular process of the hyomandibula. A similar placement is suggested by a Bayesian analysis of this same dataset, although relationships throughout the tree are less resolved. Our results reject previous interpretations of Brazilichthys as a relative of Birgeriidae, a Triassic group consistently placed within the actinopterygian crown. Although Acrolepis is too poorly known to be included in our analysis, we also reject a close relationship between this taxon and Brazilichthys, as their only shared similarities appear to be broadly distributed among early actinopterygians.

Morphological and systematic reassessment of †Knightia  brasiliensis Woodward, 1939 (Teleostei: Clupeiformes) from the Pliocene of Parnaíba Basin, northeastern Brazil

Zootaxa ◽  
2010 ◽  
Vol 2440 (1) ◽  
pp. 1 ◽  
Author(s):  
FRANCISCO J. DE FIGUEIREDO
Keyword(s):  
Type Species ◽  
New Genus ◽  
Northeastern Brazil ◽  
Nominal Species ◽  
Lower Eocene ◽  
East Pacific ◽  
The Family ◽  
Close Relationship ◽  
Clupeoid Fish ◽  
Parnaíba Basin

†Knightia brasiliensis, a small clupeoid fish found in the Tertiary beds of Nova Iorque, State of Maranhão (Brazil), is morphologically redescribed in detail. It is separated from nominal species of †Knightia, including the type-species †Knightia eoceana from the Lower Eocene of Wyoming, mainly by the absence of dorsal scutes, presence of two supramaxillae, and one epural, and is therefore placed in a new genus, †Paleopiquitinga gen. nov. The caudal skeleton of †Paleopiquitinga gen. nov. shows some advanced features (one epural, parhypurapophysis, and pleurostyle) in comparison with other well-known fossil clupeomorphs from the Cretaceous and Tertiary of South America and Africa, and a combination of features indicates the placement of †Paleopiquitinga gen. nov. within the family Clupeidae. Although uncertainties about polarity of characters within the Clupeidae render the relationships of †Paleopiquitinga gen. nov. difficult to establish at present, certain features indicate a close relationship with the extant Atlantic and East-Pacific genus Lile.

scholarly journals The zooplankton biodiversity of some freshwater environments in Parnaíba basin (Piauí, Northeastern Brazil)

2013 ◽  
Vol 73 (1) ◽  
pp. 125-134 ◽  
Author(s):  
JDN. Paranhos ◽  
VLS. Almeida ◽  
JP. Silva Filho ◽  
MN. Paranaguá ◽  
M. Melo Júnior ◽  
...  
Keyword(s):  
Grey Literature ◽  
Course Completion ◽  
Freshwater Ecosystems ◽  
The State ◽  
Northeastern Brazil ◽  
The Subject ◽  
Total Fauna ◽  
New Occurrences ◽  
Freshwater Environments ◽  
Parnaíba Basin

The plankton fauna of the state of Piauí, Northeastern Brazil, especially in the Parnaíba basin, is still poorly known; the results of most studies of the subject have not been published and can only be found in grey literature (unpublished scientific works), such as course completion work and consulting reports. Thus, this paper presents data from samples taken recently from different water bodies in Piauí and represents the second study to be published on the region's zooplankton since the pioneering work of Spandl (1926). A total of 38 species were recorded, including 23 new occurrences of rotifers, 10 of cladocerans and 2 of copepods for the state of Piauí. The greatest richness was observed for the rotifers, of which the genus Brachionus must be highlighted, especially at the Joana reservoir. Among the crustaceans, the greatest richness was observed at the Bezerra reservoir, where cladocerans of the genus Bosmina were prominent. The rotifers Brachionus havanaensis Rousselet, 1911 and Filinia longiseta (Ehrenberg, 1834); the cladocerans Diaphanosoma spinulosum Herbst, 1967 and Moina micrura Kurz, 1874; and the copepods Notodiaptomus cearensis Wright, 1936 and Thermocyclops decipiens Kiefer, 1927 occurred in all or in most environments in which the respective groups were studied. The results presented here expand the taxonomic list of zooplankton for the state of Piauí, including a total fauna of 30 species of rotifers, 15 of cladocerans and 3 of copepods. The zooplankton richness was considered low in the studied reservoirs compared to other freshwater ecosystems from Northeastern Brazil; however, the few studies developed in the Parnaíba basin suggest that the diversity for these organisms should be higher.

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