A5081861517- Ichthyology and Marine Biology
- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Paleontology and Evolutionary Biology
- Fish Ecology and Management Studies
- Marine Ecology and Invasive Species
- Marine animal studies overview
- Species Distribution and Climate Change
- Insect-Plant Interactions and Control
- Plant and animal studies
- Marine and fisheries research
- Turtle Biology and Conservation
- Identification and Quantification in Food
- Reproductive biology and impacts on aquatic species
- Aquaculture Nutrition and Growth
Universidade Federal da Paraíba
2020-2025
Universidade de São Paulo
2011-2020
Smithsonian Institution
2018
Museu Paraense Emílio Goeldi
2010
Centrus Diagnósticos por Imagem
2010
A new subfamily (Styracurinae, subfam. nov.) and genus (Styracura, gen. are erected for Trygon schmardae Werner, 1904 (type species) Dasyatis pacificus Beebe & Tee-Van, 1941, species placed in Himantura Müller Henle, 1837 since 1953 but which differ significantly from it all dasyatid genera many morphological features. Recent molecular phylogenetic hypotheses based on the entire protein-coding mitochondrial genome have recovered Styracura as sister group of Neotropical freshwater...
A new species of congrid eel, Bathycongrus villosus sp. nov., is described from the Philippines and Vanuatu. It similar to some small-toothed currently placed in Bassanago. In this paper we compare Bassanago albescens (Barnard, 1923) parviporus Karmovskaya, 2011, which it most closely resembles. An analysis 19 characters shows that agrees with Bat. 16 Bas. one. two characters, three are all different. We therefore place Bathycongrus.
Otodus megalodon (Lamniformes: Otodontidae) is an iconic Neogene shark, but the lack of well-preserved skeletons has hampered our understanding various aspects its biology. Here, we reassess some biological properties using a new approach, based on known vertebral specimens O. and 165 species extinct extant neoselachian sharks across ten orders. Using median neurocranial caudal fin proportions relative to trunk proportion among non-mitsukurinid/non-alopiid lamniforms, show that could have...
The morphology of the articular region scapulocoracoid and basal cartilages pectoral fin endoskeleton elasmobranchs is reviewed in detail. Examination this specific more than 140 species (of which 40 are reported here) revealed characters that may have a bearing on higher-level phylogeny group. Ten distinct scapular described, varying terms number sites as well their (e.g. whether surface composed condyles and/or facets). Previous interpretations morphological phylogenies also reviewed,...
Abstract The morphology of paired fins is commonly overlooked in morphological studies, particularly the pelvic girdle and fins. Consequently, previous phylogenetic studies incorporating data used few skeletal characters from this complex. In paper, significance articular for elasmobranchs discussed light variation observed 130 species, most comprehensive study exploring done so far. 10 proposed herein articulation were incorporated into a molecular matrix NADH2 sequences submitted to an...
A taxonomic revision of two nominal species freshwater stingrays the genus Potamotrygon previously considered valid, falkneri Castex & Maciel, 1963 and castexi Castello Yagolkowski, 1969, was conducted based on a detailed analysis external internal morphology, including morphometric meristic study specimens from recorded range both species. The status P. menchacai Achenbach, 1967, treated by previous authors as junior synonym falkneri, also evaluated. These species, which constitute what...
Potamotrygon limai, sp. nov., is described from the Jamari River, upper Madeira River system (Amazon basin), state of Rondônia, Brazil. This new species differs congeners by presenting unique polygonal or concentric patterns formed small whitish spots better defined over posterior disc and tail-base regions. can be further distinguished in same basin other characters combination, such as two to three rows midtail spines converging a single irregular row at level caudal sting origin,...
The extinct megatooth shark, †Otodus megalodon, which likely reached at least 15 m in total length, is an iconic shark represented primarily by its gigantic teeth the Neogene fossil record.As one of largest marine carnivores to ever exist, understanding biology, evolution, and extinction †O.megalodon important because it had a significant impact on ecology evolution ecosystems that shaped present-day oceans.Some attempts inferring body form have been carried out, but they are all speculative...
Potamotrygon tatianae sp. nov., is described from Río Madre de Díos, Peru, upper Rio Madeira basin. The new species distinguished all congeners by a unique combination of characters, including its dorsal color pattern formed relatively slender, highly convoluted, beige to dark brown vermicular pattern, single row tail spines, and longer posterior caudal stings. occurs sympatrically with other (P. falkneri, P. orbignyi motoro). From the similar further absence circular, reniform, oval spots,...
Abstract The scapulae of elasmobranchs project dorsolaterally from their fusion with the coracoid bar pectoral girdle, serving as anchoring points for cucullaris, trunk and appendicular muscles articular pectoral-fin skeleton. many elasmobranch taxa are described, an emphasis on variations in posterior margin, effort to reveal characters phylogenetic relevance. In particular, information scapula was found some squaliform sharks. Representatives Dalatiidae, Somniosidae, Oxynotidae...
The Neotropical freshwater stingray Potamotrygom orbignyi (Castelnau, 1855), and other similar "reticulated" species occurring in northern South American basins, were submitted to a thorough taxonomic analysis based on an extensive external internal morphological study. identity of P. the status related nominal Potamotrygon dumerilii reticulata (Günther, 1880), humerosa Garman, 1913, are defined. Taxonomic analyses revealed that fall within range variation found consequently treated as...
Abstract Potamotrygon marquesi , sp. nov., is described and compared with other species of occurring in the Amazon Basin. The identity this new supported by an extensive external internal morphological study including coloration pattern, squamation, skeleton ventral lateral‐line canals. Morphometrics meristics were used to further distinguish P. from congeners. was first considered fall within range variation found motoro . However, even observed presents a series autapomorphies that...
Abstract Lamniform sharks are one of the more conspicuous groups elasmobranchs, including several emblematic taxa as white shark. Although their monophyly is well supported, interrelationships within Lamniformes remains controversial because conflict among various previous molecular‐based and morphology‐based phylogenetic hypotheses. In this study, we use 31 characters related to appendicular skeleton lamniforms demonstrate ability resolve systematic shark order. particular, new additional...
This study investigates the skeletal architecture of anteroproximal surface anterior pectoral basals in squaliform sharks, which presents distinctions at insertion one components depressor pectoralis muscle. Some squalomorph and galeomorph sharks studied have a different orientation propterygium or portion composite basal, as these project dorsally to form distinct anterolateral plan for An exclusive condition articular was observed Centrophoridae, Dalatiidae, Oxynotidae, Somniosidae,...
We report deformities in the pelvic fin and clasper skeleton specimens of Potamotrygon marquesi from Acre, Northwestern Brazil. The malformations involve skeletal girdle, right skeleton, severe muscular left or clasper, including loss all its terminal components. Descriptions dealing with elasmobranchs are extensive literature important for future studies their probable causes. Nevertheless, although reasons these herein possibly linked to malformation (as a result stress chemical...
The morphology of the pectoral girdle and fin Anguillidae is reconsidered via inclusion skeletal components that have previously been unassessed. For example, in Anguilla were erroneously reported to lack a scapular bone, cartilaginous scapulocoracoid plate propterygium. also compared with closely related genus Nemichthys , including additional data on anatomy this eel family.
Abstract A cladistic analysis of the eel families Derichthyidae and Colocongridae is herein proposed for first time on basis morphological data. We discovered dozens new phylogenetic characters derived from a detailed pectoral skeleton, an anatomical system neglected by most previous studies. Our maximum parsimony indicates that sensu lato paraphyletic, with its two constituent genera Coloconger Congriscus appearing as successive sister groups derichthyids. Monophyly family Derichthyidae,...
Abstract The rays of the order Myliobatiformes present several diagnostic characters, most striking one being presence a serrated sting on dorsal region tail. Although morphological hypotheses have been proposed supporting monophyly and interrelationships its members, few characters appendicular skeleton were employed. In study, we analyzed comparatively pelvic girdle morphology across all groups to investigate distribution ischial process. To understand significance, tested this character...
The morphology of the articular region pectoral girdle and associated basals in Etmopteridae is revised light new evidence provided by taxa unavailable for previous studies. Such studies considered that etmopterids plesiomorphically had a single condyle, only Etmopterus two separate ones. Our reanalysis indicates possession condyles, one articulation propterygium second meso- metapterygium, most widespread condition this group. However, presence condyles not recovered as synapomorphy...
Oral denticles of sharks are composed by a crown, dentine covered layer enameloid and pulp cavity, the same structure dermal found across body surface most elasmobranchs. In addition, oral papillae taste buds distributed among within oropharyngeal playing fundamental role for tasting as part chemosensory system fishes. Scanning electron microscopy (SEM) has been employed an important tool study other structures, well histology more recently computed tomography (CT) scan analysis. Herein,...
Abstract Leptocharias smithii has been poorly explored in anatomical terms. This species bears a mosaic of morphological characters and is considered to represent an intermediate condition between other carcharhiniform clades. In the present paper, anatomy appendicular skeleton thoroughly investigated compared with representatives order Carcharhiniformes. exclusive characteristics, such as visible separation pro‐ mesopterygia but it also aplesodic pectoral fin, shared carcharhiniforms placed...