Matías Sebastián Mora

Instituto de Investigaciones Marinas y Costeras (IIMyC, CONICET), Universidad Nacional de Mar del Plata. · Biología

Ctenomys (tuco-tucos) is one of the most speciose genera of mammals, with around 70 described species. Recently, the rate of new species descriptions within the genus Ctenomys has notably increased, primarily due to recent taxonomic revisions and surveys in previously unexplored geographic areas. In this study, utilizing both morphological and mole...

Subterranean rodents of the genus Ctenomys typically occupy fragmented habitats, many currently altered by anthropogenic development. These changes affect functional connectivity among individuals, reducing gene flow levels. This study assessed the functional connectivity of two sympatric species of subterranean rodents, Ctenomys australis and Cten...

The genus Ctenomys is the most speciose of all known subterranean rodents. Currently, most species of this genus are included in eight distinctive phylogenetic groups. The Ctenomys talarum phylogenetic group has remained invariant in terms of the number of species in recent years. This group of species forms a well-supported monophyletic clade comp...

The coastal dunes of the southeast of Buenos Aires province, Argentina, present two different described species of tuco-tucos: Ctenomys talarum and C. australis. Formerly, C. talarum was subdivided into three subspecies (C. t. talarum, C. t. recessus, and C. t. occidentalis), mainly based on its geographic distribution and phenotypic variation in c...

RED LIST ASSESSMENT OF THE MAMMALS OF ARGENTINA 2019: SUMMARY AND ANALYSIS OF THREATS. Assessing the extinction risk of species has become an important decision tool for the implementation of species conservation policies. In this work we summarize the result of the latest oficial categorization of the mammals of Argentina with emphasis on the thre...

1. During the last decade convolutional neural networks (CNNs) have revolutionized the application of deep learning methods to classification tasks and object recognition. These procedures can capture key features of image data that are not easily visible to the human eye and use them to classify and predict outcomes with exceptional precision. 2....

With about 68 recognized living species, subterranean rodents of the genus Ctenomys are found in a multiplicity of habitats, from the dunes of the Atlantic coast to the Andes Mountains, including environments ranging from humid steppes of Pampas to the dry deserts of Chaco region. However, this genus needs an exhaustive reevaluation of its systemat...

South American rodents of the genus Ctenomys (tuco-tucos) occupy the underground environment, present high specificity to loose and friable soils and have restricted mobility, with a generally fragmented distribution. We use species distribution models (SDMs) in two Ctenomys species from the Atlantic coast and continental areas of Argentina. We dev...

Molecular genetic data are increasingly used to assist in species identification and delimitation, and provide a powerful tool to detect conservation units (population/s of an organism considered to be different for conservation purposes). In combination with distributional and ecological information, molecular genetic data can contribute to establ...

Commerson’s dolphin (Cephalorhynchus commersonii), Peale’s dolphin (Lagenorhynchus australis), dusky dolphin (Lagenorhynchus obscurus), and hourglass dolphin (Lagenorhynchus cruciger) are closely related species occurring in the Southern Hemisphere. Even though they are partially sympatric, they have evolved towards diverse foraging strategies, pre...

The spatial distribution of the genetic polymorphisms in natural populations depends on the spatial and temporal scales of the underlying evolutionary and geological processes. While phylogeographic approaches focus on population genetics at broader time scales, landscape genetics emphasize on how landscape characteristics and environmental variabl...

In cetaceans, increased body flexibility is associated with increased maneuverability, this affects the animal's swimming speed and foraging behavior. A more stable body form is associated with fast swimming and wide turns. One factor that affects the flexibility of a cetacean's body is the structure and interaction of its vertebrae. Differences in...

Understanding the processes and patterns of local adaptation and migration involves an exhaustive knowledge of how landscape features and population distances shape the genetic variation at the geographical level. Ctenomys australis is an endangered subterranean rodent characterized by having a restricted geographic range immerse in a highly fragme...

The Eastern Barrier of Dunes (EBD) and Southern Barrier of Dunes (SBD) extend along the coast of Buenos Aires province, Argentina. These regions have been severely altered by anthropic activities for years, mainly through the development of cities and afforestation with exotic species. We quantified the effect of anthropic activities on the landsca...

It is generally assumed that the digenean human liver fluke, Fasciola hepatica, gained entry to South America during the 15th century upon arrival of Europeans and their livestock. Nonetheless in Patagonia, Argentina, digenean eggs similar to F. hepatica have been observed in deer coprolites dating back to 2300 years B.P. The main objective of our...

In cetaceans, body flexibility is associated with swimming speed and foraging behavior. Greater flexibility is associated with increased maneuverability. One factor affecting flexibility is the structure and interference of the vertebrae. We studied vertebral morphology in four closely related and partially sympatric dolphin species from the Southe...

In dolphins, centrum shape is one of the features that allows determination of stable and flexible regions in the vertebral column. The Commerson’s (Cephalorhynchus commersonii; n=37), Peale’s (Lagenorhynchus australis; n=24), dusky (Lagenorhynchus obscurus; n=29), and hourglass dolphins (Lagenorhynchus cruciger; n= 10) are closely related species...

ABSTRACT. Description and functional interpretation of morphological variation in the dolphin column can be facilitated by recognizing structural units. This information o ers important clues to the proportion of the column involved in the oscillation and displacement of the ukes, and how swimming style can vary among species. Thus, the morphologic...

La enseñanza, imitación, lenguaje y transferencia de conocimientos transgeneracionales han sido los pilares más importantes a los que algunos autores han recurrido para dar explicación de la evolución cultural como un rasgo exclusivamente humano. Estas explicaciones contienen una lógica de razonamiento circular, dado que asumen a la cultura como at...

Studies of genetic differentiation in fragmented environments help us to identify those landscape features that most affect gene flow and dispersal patterns. Particularly, the assessment of the relative significance of intrinsic biological and environmental factors affecting the genetic structure of populations becomes crucial. In this work, we ass...

Dolphin vertebral column has been described as variably flexible. Centrum shape is one of the features that allow determination of stable and flexible areas in the column. Centra from stable areas are short anteroposteriorly and with large articular facets; opposite features would be signaling a potentially flexible area. The Commerson’s dolphin (C...

We conducted a thorough survey of populations of Ctenomys within the distributional ranges of all species that currently represent the Ctenomys mendocinus species complex in Central Argentina. From the Atlantic Southeastern coast to the heights of the Los Andes mountain range we sampled individuals for all the previously recognized species within t...

Fast swimming pelagic cetacean species have osteological characteristics that promote a more stable spine in comparison to that of coastal species. The Peale's dolphin (Lagenorhynchus australis) and the hourglass dolphin (Lagenorhynchus cruciger) have a close phylogenetic relationship and are found in coastal and pelagic waters in the Southern Hemi...

Selection necessarily acts within the same current and historical demographic framework as neutral evolutionary processes, and the outcome of the interplay between these forces may vary according to their relative strength. In this study, we compare the variation at an MHC locus (DRB exon 2), typically subject to strong diversifying selection, and...

Fast-swimming dolphins have a relatively stable morphological configuration, explained partially by their vertebral morphology. The hourglass dolphin (Lagenorhynchus cruciger), an oceanic species , is one of the least known species of small odontocetes. The aim of this paper is to describe the osteology of the vertebral column of this species , rel...

Se reporta el primer registro de Liolaemus martorii en la provincia de Buenos Aires, específicamente en la Villa Balnearia 7 de Marzo (Paraje La Baliza), Partido de Patagones. Se detallan las características del lugar de colecta y se remarca la importancia que tiene este nuevo registro con respecto a la distribución actual conocida para la especie...

Gene flow plays an essential role in the evolutionary history of the organisms and helps to identify those historical landscape features that most likely had affected the dispersal patterns. In this work, we assess, using mitochondrial control region DNA sequences, the historical migration patterns and population structure in C. “chasiquensis”, a h...

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We assess geographical morphological differentiation in the subterranean rodent Ctenomys australis, which is distributed in the first line of coastal sand dunes between the localities of Necochea and Punta Alta, province of Buenos Aires, Argentina. Using a multivariate Discriminant Function Analysis (DFA), we evaluate geographic variation as congru...

We examined the phylogeography of the South American subterranean rodent Ctenomys talarum (Talas tucotuco) using mitochondrial DNA control region (D-loop) sequences. This species is an herbivorous rodent endemic to the province of Buenos Aires, Argentina, that lives in natural grasslands in coastal sand dune habitats and in some fragmented inland p...

Geographic differentiation in skull morphological characters in the subterranean rodent Ctenomys australis (Rodentia: Ctenomyidae). We assess geographical morphological differentiation in the subterranean rodent Ctenomys australis, which is distributed in the first line of coastal sand dunes between the localities of Necochea and Punta Alta, provin...

Geographic differentiation in skull morphological characters in the subterranean rodent Ctenomys australis (Rodentia: Ctenomyidae). We assess geographical morphological differentiation in the subterranean rodent Ctenomys australis, which is distributed in the first line of coastal sand dunes between the localities of Necochea and Punta Alta, provin...

In order to devise adequate conservation and management strategies for endangered species, it is important to incorporate a reliable understanding of its spatial population structure, detecting the existence of demographic partitions throughout its geographical range and characterizing the distribution of its genetic diversity. Moreover, in species...

The contemporary distribution of organisms cannot be understood without knowing how species have responded to the geologic and climatic history of their environments. Genetic studies related to the demographic history of wildlife species can help us to elucidate the role of climate changes and other environmental forces in shaping patterns of distr...