Marissa Fabrezi

Marissa Fabrezi
National Scientific and Technical Research Council | conicet · IBIGEO - Instituto de Bio y Geociencias del NOA

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45
Publications
35,025
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1,295
Citations
Citations since 2017
12 Research Items
615 Citations
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2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140

Publications

Publications (45)
Article
Full-text available
Studies of the effects of thyroid hormones on larval development in the frog Xenopus spp. have provided baseline information to identify developmental constraints and elucidate genetic and hormonal mechanisms driving development, growth, and life history transitions. However, this knowledge requires data based on other anurans to complete a compreh...
Article
The carpus (wrist) of fossil frogs is rarely preserved, because it consists of tiny skeletal elements that ossify only during the postmetamorphic life stage. The structure of the carpus is comparatively well-known in the temnospondyl ancestors of the Anura, but its changes during the transition to their anuran descendents are unknown due to the abs...
Article
Full-text available
Background: Before metamorphosis, almost all anuran tadpoles are omnivores. Larval carnivory occurs in some species and, it is associated with distinctive morphotypes. Obligatory carnivorous tadpoles exhibit structural changes in the gastrointestinal tract compared to larvae that are predominately omnivores. The most distinctive feature of the anu...
Article
Full-text available
Several hormones regulate anuran larval development, most notably thyroid hormones (THs). In anurans, metamorphosis fails when the thyroid gland is absent or inactivated, resulting in giant tadpoles. Larval gigantism occurs naturally in neotropical frogs of the genus Pseudis as a result of a prolonged larval period. Its thyroid function is poorly i...
Article
Anuran larval development comprises tissues/organs/systems that are: exclusively of larvae, able to be remodelled, and those of postmetamorphic stages. Also, the anuran larval development is characterized by interrelated parameters: time, size and shape forming part of growth and differentiation. The anuran metamorphosis starts when growth and diff...
Preprint
The South American frogs of the family Cer-atophryidae (three genera, twelve extant species) display unusual larval diversity and developmental variation despite rather similar adults. Many adult features of ceratophryids are associated with terrestrial/fossorial habits and resistance to desiccation; however, adults of the genus Lepidoba-trachus ar...
Article
Full-text available
Physalaemus biligonigerus is a leptodactylid frog that is widely distributed in southern South America and a common member of anuran assemblages that breed in temporary ponds near human settlements. Herein, we analyzed its embryonic and larval morphology through the completion of metamorphosis and constructed a normal table of development. In addit...
Chapter
Full-text available
The South American frogs of the family Ceratophryidae (three genera, twelve extant species) display unusual larval diversity and developmental variation despite rather similar adults. Many adult features of ceratophryids are associated with terrestrial/fossorial habits and resistance to desiccation; however, adults of the genus Lepidobatrachus are...
Article
Full-text available
Intraspecific variation during the anuran larval period has been analyzed mainly in relation to the timing of metamorphosis and body size at metamorphosis. However, other traits may vary as well. We examined two developmental series of Boana riojana from the same population in two consecutive years and describe intraspecific variation in larvae of...
Article
Full-text available
The peripheral nervous system of anuran larvae has traditionally been assumed to be largely invariant. Here, we describe the organization of cranial, spinal, and lateral line nerves at different larval stages of Lepidobatrachus spp. based on whole mounts. This is the first detailed description of cranial, spinal, and lateral lines innervation at pr...
Article
Full-text available
In the life of an organism (ontogeny), phenotypic changes happen throughout the time. This contribution is a review of: a) terms and definitions used in studies of the ontogeny, b) the importance to distinguish between shape variation (development) and size variation (growth); and c) the need to consider the real time (age) in which the ontogeny ta...
Article
Full-text available
Anurans have three primary types of locomotion: walking, jumping, and swimming. Additionally, they may dig, climb, grasp, etc. All adult anurans have four limbs, with four fingers on the hands and five toes on the feet. We summarized and updated knowledge on the interspecific variation within anuran limbs, then discuss how developmental constraints...
Article
Full-text available
Epigenesis and epigenetics: Examples from the morphology of tadpoles. The epigenetic, as a scientific discipline that explores the mechanisms that give rise to new phenotypes with no genome alteration, emerged as a new approach related to innovations in Molecular Biology and Developmental Genetics. However, the concept of epigenesis was proposed lo...
Article
Full-text available
We review some theoretical and methodological issues about how we study the anuran morphology and recognize: 1) scarcely studied subjects with wide generalizations for the whole order; 2) concepts that were losing their meaning and are currently used in a confusing and/or ambiguous ways; 3) topics that were extensively studied from different perspe...
Article
Full-text available
The horned frog family, Ceratophryidae, currently comprises three genera and 12 extant species, distributed from the Caribbean lowlands to the Pampean grasslands. Horned frogs are fossorial species that are remarkable in terms of their adult and larval morphology, karyotype, behavior, and other aspects of their biology. In this paper we present a m...
Article
Full-text available
A review of concepts and definitions used in Comparative Anatomy, Evolutionary Biology and Evo-Devo is presented. The available information about the morphological variation in the monophyletic clade of horned frogs Ceratophryidae (Ceratophrys, Chacophrys y Lepidobatrachus) provides the set of derived features that we considered as examples to disc...
Article
Anuran larvae have been classified into four morphological types which reflect intraordinal macroevolution. At present, complete characterizations of the lateral line system are only available for Xenopus laevis (Type I) and Discoglossus pictus (Type III). We analyzed the morphology, arrangement, and innervation of neuromasts related to the anterod...
Article
Full-text available
The role of thyroid hormone (TH) in anuran metamorphosis has been documented from a variety of approaches, but the sequence of morpho-histological development of the thyroid glands that produce the secretion of the hormone was assumed invariant from studies of relatively few species even when the effects of environmental influences on larval develo...
Article
Full-text available
A review of concepts and definitions used in Comparative Anatomy, Evolutionary Biology and Evo-Devo is presented. The available information about the morphological variation in the monophyletic clade of horned frogs Ceratophryidae (Ceratophrys, Chacophrys y Lepidobatrachus) provides the set of derived features that we considered as examples to disc...
Article
Full-text available
Adult morphological variation of muscles originating on the iliac shaft (M. iliacus externus, M. internus, and tensor fasciae latae) and vertebrae (M. longissimus dorsi,M. coccygeosacralis, and M. coccygeoiliacus) that are involved in postmetamorphic anuran locomotion was recorded in 41 neobatrachians and coded in 13 more based on the literature, f...
Article
Ceratophryidae represent a monophyletic group of terrestrial and aquatic frogs inhabiting lowlands of South America where they are more diverse in semiarid environments of the Chaco region. Adult morphology of ceratophryids presents some features associated to terrestrial and fossorial life such as hyper-ossified skulls, spade feet for digging, amo...
Article
Full-text available
The monophyly of Microhylidae is supported by an overwhelming accumulation of synapomorphic larval features. Despite the distinctiveness of the microhylid tadpole, few studies have focused on larval development. Microhylid larval morphology is usually described and based on standard tables that imply that developmental events at equivalent stages o...
Article
Full-text available
El concepto de heterocronía está ligado a la variación en la ontogenia y es frecuente en estudios de morfología comparada, involucra tanto a caracteres individuales como a todo el organismo, al tamaño y a la forma y lleva implícito el tiempo en el cual ocurre una trayectoria ontogenética. El estudio de la heterocronía ha generado un conjunto de tér...
Article
Full-text available
Heterochrony refers to those permutations in timing of differentiation events, and those changes in rates of growth and development through which morphological changes and novelties originate during phyletic evolution. This research analyzes morphological variation during the ontogeny of 18 different anuran species that inhabit semi-arid environme...
Article
Many traits of the skull of ceratophryines are related to the capture of large prey independently of aquatic or terrestrial feeding. Herein, detailed descriptions of the development of hyoid skeleton and the anatomy of muscles responsible for hyoid and tongue movements in Lepidobatrachus laevis and L. llanensis are provided and compared with those...
Article
Full-text available
Pseudis platensis, like Pseudis paradoxa, is a Neotropical aquatic frog with a giant tadpole. Despite being one of the few anuran species whose larvae grow larger than adults, knowledge of its larval development is limited to prometamorphic stages. This study describes qualitative and quantitative variation through P. platensis larval development,...
Article
Although Pleurodiran turtles represent an important component of extant turtle radiation, our knowledge of the development and homology of limb bones in turtles rests mostly upon observations made on derived members of the Cryptodiran clade. Herein, we describe limb development in three pleurodirans: Podocnemis unifilis Troschel, 1848, Podocnemis s...
Article
The aquatic frog Pseudis platensis has a giant tadpole, long developmental time, and dissociated metamorphic events that include later offset of larval somatic morphologies. Moreover, when the tadpole metamorphoses, the young frog is nearly the size of an adult, suggesting that this species has low rates of postmetamorphic growth. Herein, we study...
Article
Full-text available
Recent studies have described the giant tadpole, delayed metamorphic transformations, and absence of postmetamorphic growth of the skeleton of Pseudis Platensis. These features address questions about derived patterns of life cycles and the role of the heterochrony during the metamorphosis in anurans. Using anatomical methods, we provide new data o...
Article
Heterochrony produces morphological change with effects in shape, size, and/or timing of developmental events of a trait related to an ancestral ontogeny. This paper analyzes heterochrony during the ontogeny of Ceratophryinae (Ceratophrys, Chacophrys, and Lepidobatrachus), a monophyletic group of South American frogs with larval development, and us...
Article
Full-text available
This paper reviews skeletal variation of the prepollex and prehallux among anurans and analyses their ontogeny in neotropical species. Morphological diversity is related to the number and features of distal elements. In some groups, clear phylogenetic trends may be interpreted from prepollical and/or prehallical reduction. However, specialized patt...
Article
This study describes the adult cranial osteology of the gymnophthalmid lizard Bachia bicolor, and its variation during postnatal development. Descriptions are based on a size series of osteological preparations, including dry skeletons and cleared and double-stained specimens. The adult skull morphology of B. bicolor is similar to that of other gym...
Article
Full-text available
Webbed feet evolved convergently in most groups of aquatic tetrapods. However, extensive webbing is not always limited to an aquatic life style. In Anurans, hind limbs display great variation, including absence, of interdigital membranes, which is explained by differential growth rates of digital and interdigital tissues during early limb developme...
Article
Intercalary elements are additional skeletal structures of digits of many anuran amphibians. Twelve terminal clades in the neobatrachian lineage of frogs have intercalary elements revealing it is a homoplastic character with five to seven gains and two to four losses along a consensus phylogeny of the Neobatrachia. We analyzed anatomical variation...
Article
Shubin and Alberch (Evol Biol 1986;20:319-387) proposed a scheme of tetrapod limb development based on cartilage morphogenesis that provides the arguments to interpret the homologies of skeletal elements and sets the basis to explain limb specialization through later developmental modification. Morphogenetic evidence emerged from the study of some...
Article
Body form is one of the major consequences of development, and diversification of body shapes implies developmental changes among species. In anurans, changes in the timing of developmental events or heterochrony, have been emphasized as a source of variation in the patterns of development that has lead to diverse morphology. Herein, different appr...
Article
Full-text available
En este trabajo se presenta una descripción detallada de la morfología de la larva del escuerzo Chacophrys pierottii. La descripción incluye una revisión de la morfología externa, el patrón de distribución de los órganos del sistema de la línea lateral y comentarios de la biología larval. Se describe la variación en el apén-dice nasal de la larva d...
Article
Full-text available
The anuran lower jaw is composed of three pairs of bones: dentaries, angulosplenials and mentomeckelians. Although the lower jaw is toothless, except in Gastrotheca guentheri, enlarged fangs or odontoids have evolved at least four times independently in some myobatrachids, hylids, ranids and leptodactylids through both parallel and convergent evolu...
Article
The unity and diversity of developmental processes in the vertebrate limb have singular importance in the interpretation of evolutionary hypotheses of tetrapod diversification. In anurans, the intraordinal diversity of forelimbs seems to be related to the fusion of distal carpals, whereas proximal carpals are invariable. However, there are differen...
Conference Paper
Full-text available
Desde su llegada a la Argentina, a mediados de los años ’60, Raymond F. Laurent se dedicó, infatigablemente, al estudio de los anfibios y reptiles del noroeste del país, al tiempo que continuaba sus estudios sobre la fauna del centro de Africa. Pero esta obra fue complementada con otra quizás más trascendente, y es que R.F. Laurent supo promover, c...
Article
Full-text available
The available information on the identity of the embryonic and adult cartilaginous elements in the anuran carpus is limited, often confusing, and sometimes even contradictory. Based on a comparative study of complete ontogenetic series of seven anuran species (representing three families), we map some of the diversity encountered in the ontogeny of...
Article
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Article
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Projects (3)
Project
Red de Estudios en Larvas de Anfibios Neotropicales Red académica de intercambio de experiencias, información, investigación y oportunidades para aquellos interesados en morfología, ecología, sistemática y evolución de los anfibios, y el rol que ha jugado el ciclo de vida bifásico en la diversidad actual de estos organismos
Project
I am currently working on several projects covering the main sedimentary basins of Salta Province (Argentina). The main objective is to reconstruct the Cretaceous-Cenozoic mammalian communities in relation to the geological and environmental evolution of Salta province. Main projects on: Mammals from Salta Group, Oran Group, Payogastilla Group Quaternary mammals in relation to paleoseismicity