scholarly journals Interpreting character variation in turtles: Araripemys barretoi (Pleurodira: Pelomedusoides) from the Araripe Basin, Early Cretaceous of Northeastern Brazil

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9840
Author(s):  
Saulo Limaverde ◽  
Rodrigo Vargas Pêgas ◽  
Rafael Damasceno ◽  
Chiara Villa ◽  
Gustavo R. Oliveira ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Morphological Variation ◽  
Northeastern Brazil ◽  
Valid Species ◽  
Ontogenetic Variation ◽  
Specific Identification ◽  
Character Variation

The Araripe Basin (Northeastern Brazil) has yielded a rich Cretaceous fossil fauna of both vertebrates and invertebrates found mainly in the Crato and Romualdo Formations, of Aptian and Albian ages respectively. Among the vertebrates, the turtles were found to be quite diverse, with several specimens retrieved and five valid species described to this date for the Romualdo Formation. There were also records of turtles from Ipubi and Crato Formations, mainly fragmentary material which precluded proper specific identification; however, Araripemys barretoi is supposed to occur on both Crato and Romualdo Formations. Here we describe thirteen specimens of A. barretoi-including the first description of an almost complete individual, bearing a skull, from the Crato Formation. We report a great amount of morphological variation, interpreted as being essentially of intraspecific nature, including individual, sexual and ontogenetic variation.

scholarly journals Interpreting character variation in turtles: Araripemys barretoi (Pleurodira: Pelomedusoides) from the Araripe Basin, Early Cretaceous of Northeastern Brazil

2018 ◽  
Author(s):  
Saulo Limaverde ◽  
Rodrigo Vargas Pêgas ◽  
Rafael Damasceno ◽  
Chiara Villa ◽  
Gustavo Oliveira ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Morphological Variation ◽  
Northeastern Brazil ◽  
Valid Species ◽  
Ontogenetic Variation ◽  
Specific Identification ◽  
Character Variation

The Araripe Basin (Northeastern Brazil) has yielded a rich Cretaceous fossil fauna of both vertebrates and invertebrates found mainly in the Crato and Romualdo Formations, of Aptian and Albian ages respectively. Among the vertebrates, the turtles were proved quite diverse, with several specimens retrieved and five valid species described to this date for the Romualdo Fm. There were also records of turtles from Ipubi and Crato Fms., mainly fragmentary material which precluded proper specific identification; however, Araripemys barretoi is supposed to occur on both Crato and Romualdo Fms. Here we describe thirteen specimens of A. barretoi - including the first description of an almost complete individual, bearing a skull, from the Crato Fm. We report a great amount of morphological variation, interpreted as being essentially of intraspecific nature, including individual, sexual and ontogenetic variation.

scholarly journals Interpreting character variation in turtles: Araripemys barretoi (Pleurodira: Pelomedusoides) from the Araripe Basin, Early Cretaceous of Northeastern Brazil

2018 ◽  
Author(s):  
Saulo Limaverde ◽  
Rodrigo Vargas Pêgas ◽  
Rafael Damasceno ◽  
Chiara Villa ◽  
Gustavo Oliveira ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Morphological Variation ◽  
Northeastern Brazil ◽  
Valid Species ◽  
Ontogenetic Variation ◽  
Specific Identification ◽  
Character Variation

The Araripe Basin (Northeastern Brazil) has yielded a rich Cretaceous fossil fauna of both vertebrates and invertebrates found mainly in the Crato and Romualdo Formations, of Aptian and Albian ages respectively. Among the vertebrates, the turtles were proved quite diverse, with several specimens retrieved and five valid species described to this date for the Romualdo Fm. There were also records of turtles from Ipubi and Crato Fms., mainly fragmentary material which precluded proper specific identification; however, Araripemys barretoi is supposed to occur on both Crato and Romualdo Fms. Here we describe thirteen specimens of A. barretoi - including the first description of an almost complete individual, bearing a skull, from the Crato Fm. We report a great amount of morphological variation, interpreted as being essentially of intraspecific nature, including individual, sexual and ontogenetic variation.

AN ANALYSIS OF INTERSPECIFIC AND INTRASPECIFIC MORPHOLOGICAL DIFFERENCES IN TWO CLOSELY RELATED SPECIES OF AMBLYSEIUS BERLESE USING METHODS OF NUMERICAL TAXONOMY (ACARINA: PHYTOSEHDAE)

1977 ◽  
Vol 109 (12) ◽  
pp. 1605-1618 ◽  
Author(s):  
D.A. Chant ◽  
R.I.C. Hansell ◽  
H.J. Rowell
Keyword(s):  
Host Plant ◽  
Morphological Variation ◽  
Related Species ◽  
Numerical Taxonomy ◽  
Valid Species ◽  
Closely Related Species ◽  
Multivariate Tests ◽  
Taxonomic Methods ◽  
Morphological Differences ◽  
Intraspecific Morphological Variation

AbstractMorphological variation between two closely related species in the genus Amblyseius Berlese was examined by numerical taxonomic methods. Multivariate tests indicated that A. canadensis Chant and Hansell and A. novaescotiae (Chant) represent two separate and distinct morphological groups. This supports their taxonomic retention as valid species. Intraspecific morphological variation was also examined and found to be correlated with climatic and host plant variables.

A remarkable new genus and species of the planktonic shrimp family Luciferidae (Crustacea, Decapoda) from the Cretaceous (Aptian/Albian) of the Araripe Sedimentary Basin, Brazil

2018 ◽  
Vol 92 (3) ◽  
pp. 459-465 ◽  
Author(s):  
Antônio Álamo Feitosa Saraiva ◽  
Allysson Pontes Pinheiro ◽  
William Santana
Keyword(s):  
Early Cretaceous ◽  
New Genus ◽  
Sedimentary Basin ◽  
Northeastern Brazil ◽  
New Genus And Species ◽  
Calcareous Shale ◽  
The Family

AbstractA new genus and species of the planktonic shrimp family Luciferidae,Sume marcosin. gen. n. sp., is described and illustrated from material collected in calcareous shale of the late Early Cretaceous (Aptian–Albian) Romualdo Formation, Araripe Basin, northeastern Brazil. The material is very well preserved, including the antennae, stalked eyes, second and third maxillipeds, pleopods, and uropods, and represents the first described fossil of the family Luciferidae.UUID:http://zoobank.org/fdf825b8-6fe9-42ae-8fc7-73c220eec03a

Bromeliaceae from Rio Grande do Norte State, Northeastern Brazil

Phytotaxa ◽  
2019 ◽  
Vol 422 (2) ◽  
pp. 113-143
Author(s):  
EDUARDO CALISTO TOMAZ ◽  
LEONARDO M. VERSIEUX
Keyword(s):  
Atlantic Forest ◽  
Morphological Variation ◽  
New Records ◽  
Rio Grande ◽  
The State ◽  
Additional Research ◽  
Identification Key ◽  
Northeastern Brazil ◽  
Genus One

The Bromeliaceae Flora for the state of Rio Grande do Norte, Northeastern Brazil, is presented, based on extensive fieldwork, morphological analyses using herbarium and freshly collected material, and specialized literature. Twenty-six species of bromeliads were recorded in Rio Grande do Norte, distributed in ten genera and in three subfamilies. Bromelioideae was the richest subfamily (eight genera/14 species), followed by Tillandsioideae (one genus/12 species), and Pitcairnioideae (one genus/one species). Aechmea mertensii, Hohenbergia horrida and Tillandsia tenuifolia are new records for Rio Grande do Norte. Eight species (31%) are restricted to the Eastern portion of the state, in the Atlantic Forest. Caatinga dry woodlands harbor 18 species, with remarkable presence of Bromelia laciniosa, Encholirium spectabile, Tillandsia recurvata and T. streptocarpa, the four most widely distributed taxa. We discuss problems related to unclear taxonomic circumscriptions of species or diverging information between authors, more expressively in Hohenbergia, but also in Aechmea, Cryptanthus and Tillandsia. The data presented here might contribute to better understand the morphological variation of these taxa and suggest additional research on their taxonomy. Morphological descriptions, general comments, a map, photo plates and an identification key for all taxa are provided.

Two new Auletta Schmidt, 1870 (Axinellidae; Demospongiae; Porifera) from Brazil

Zootaxa ◽  
2017 ◽  
Vol 4273 (1) ◽  
pp. 121
Author(s):  
THAYNÃ CAVALCANTI ◽  
RADHARANNE RECINOS ◽  
ULISSES PINHEIRO
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
The Other ◽  
External Morphology ◽  
Northeastern Brazil ◽  
Valid Species ◽  
Brazilian Coast ◽  
Tubular Shape ◽  
Cavernous Body

The genus Auletta Schmidt, 1970 comprises 14 valid species, with six known from the Atlantic Ocean. The genus was previously recorded for the Brazilian coast only in 1967 from surveys in Pernambuco State. The present paper describes two new Auletta from Northeastern Brazil. Auletta akaroa sp. nov. is from Alagoas State and it has a stalked tubular shape and small sinuous styles and strongyles. Auletta laboreli sp. nov. was found in Pernambuco State and it is a sponge with a cylindrical and cavernous body composed of styles with blunt and telescopic tips and sinuous strongyles. Both new species were compared with the other valid species of Auletta. The spicule complement and external morphology of the new species are discussed. 

scholarly journals Morphological variation in the hydromedusa genus Polyorchis on the west coast of North America

1980 ◽  
Vol 58 (11) ◽  
pp. 2089-2095 ◽  
Author(s):  
John T. Rees ◽  
R. J. Larson
Keyword(s):  
North America ◽  
Morphological Variation ◽  
West Coast ◽  
Baja California ◽  
Geographic Range ◽  
Valid Species ◽  
The West ◽  
Radial Canal

Morphological variation in the hydromedusan genus Polyorchis on the west coast of North America is analyzed in relation to gonad number, tentacle number, and radial canal diverticula number relative to the height of the bell. In specimens of Polyorchis examined, it is concluded that P. penicillatus (Eschscholtz, 1829) is highly variable morphologically over its known geographic range from Alaska to Baja California. Polyorchis montereyensis Skogsberg, 1948 is considered a synonym of P. penicillatus, and P. haplus Skogsberg, 1948, is retained as a valid species.

scholarly journals The identity of Apostolepis pymi and placement of A. quinquelineata in the synonymy of A. nigrolineata (Serpentes, Xenodontinae)

2010 ◽  
Vol 10 (1) ◽  
pp. 343-346 ◽  
Author(s):  
Thales de Lema ◽  
Nelson Rufino de Albuquerque
Keyword(s):  
Northeastern Brazil ◽  
Valid Species ◽  
Background Color ◽  
Review Of The Literature ◽  
Dorsal Region ◽  
Mato Grosso ◽  
Endemic Population ◽  
Black Band ◽  
Considerable Controversy ◽  
Correct Application

The correct application of the names Apostolepis nigrolineata, A. quinquelineata, and A. pymi has been subject of considerable controversy. Based upon review of the literature and the characteristics used to distinguish these species from each other, we conclude that A. pymi is a valid species and that A. quinquelineata is a junior synonym of A. nigrolineata. They differ from each other in hemipenial morphology and coloration. The background color of A. nigrolineata is reddish brown (vs. brown in A. pymi). In addition, only the dorsal region of end of tail is covered by a black band in A. nigrolineata (vs. end of tail completely surrounded by a black band in A. pymi). Both species are sympatrically distributed along the lowlands of Amazonia but A. nigrolineata occurs in both western and eastern regions whereas A. pymi is restricted to eastern regions with additional records from the States of Amazonas, Rondônia, Mato Grosso and an endemic population in the state of Ceará, northeastern Brazil.

scholarly journals A unique exceptionally well-preserved pterosaur skull from the Crato Formation of Brazil

2017 ◽  
Author(s):  
Hebert Bruno Nascimento Campos ◽  
Aude Cincotta ◽  
Eberhard Frey ◽  
Pascoal Godefroit ◽  
Johan Yans
Keyword(s):  
Early Cretaceous ◽  
Soft Tissues ◽  
Posterior Part ◽  
Northeastern Brazil ◽  
New Taxon ◽  
Exceptional Preservation ◽  
New Information ◽  
Specific Morphology ◽  
Parallel Fibres ◽  
Sagittal Crest

The posterior part of a skull from a tapejarid pterosaur was studied for the exceptional preservation of its soft-tissues. The specimen comes from the Early Cretaceous (Aptian) Crato Formation of northeastern Brazil. It shows a peculiar soft sagittal crest that gives new information about the anatomy and the diversity of tapejarids. The specimen lies on five limestone slabs. The bony part comprised the posterior part of the skull, with the braincase and one complex of three dorsally oriented and associated bony crests. The crest consists of a huge and elongated parietal crest, a trabecular frontal crest, and an occipital spine. The specimen preserves the posterior parts of the nasoantorbital fenestra and orbit. The soft cranial crest is characterized by a multilinear dorsal crest with almost parallel fibres, which curve posteriorly. Pigment organelles – melanosomes – were observed in the crest as well as ‘hair-like’ fibres (pycnofibres). They present diverse shapes and sizes, suggesting diverse colorations for the soft tissues. The new tapejarid shares certain features with the tapejarids Tupandactylus imperator and “Huaxiapterus” benxiensis, which include an elongated parieto-occipital crest. Nonetheless, it differs from Tupandactylus imperator and Ingridia navigans by the following characteristics: absence of a suprapremaxillary spine, very dorsally oriented posterior crests, as well as a specific morphology for the soft crest. Our specimen can therefore be assigned to a new taxon of Tapejaridae, a group previously reported from the Crato Formation.

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