Gabriel M MartinCentro de Investigación Esquel de Montaña y Estepa Patagónica (CIEMEP) - CONICET y UNPSJB · Mastozoología
Gabriel M Martin
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Introduction
Publications
Publications (107)
The genus Ctenomys is represented by 68 species within at least 9 species groups. In Patagonia, there are 11 described species of Ctenomys in 3 phylogenetic species groups: (1) the sociabilis group; (2) the magellanicus group; and (3) the mendocinus group—added to this is C. maulinus, which is not clearly related to any species group. The magellani...
1. New World Marsupials (NWMs) comprise over 135 species ranging from Patagonia (Argentina) to northern North America, classified within the orders Didelphimorphia, Microbiotheria and Paucituberculata. 2. This study examines recent taxonomic revisions and conservation priorities for NWMs, based on the IUCN Red List assessments and current literatur...
The genus Caenolestes is the most species-rich of the marsupial order Paucituberculata. Two species inhabit Colombia (and also occur in Ecuador) with a discontinuous distribution that has not been accounted for in previous studies—Caenolestes fuliginosus known from the Central and Eastern Andes, and C. convelatus restricted to the Western Andes. He...
We created a database of lost and rediscovered tetrapod species, identified patterns in their distribution and factors influencing rediscovery. Tetrapod species are being lost at a faster rate than they are being rediscovered, due to slowing rates of rediscovery for amphibians, birds and mammals, and rapid rates of loss for reptiles. Finding lost s...
Species distribution models (SDM) are the spatial surrogate of the suitability of a species in the biophysical aspect, since they are based on predicting their presence using climatic and environmental indicators. SDMs are satisfactory at regional scales, where biological interactions such as predation and competition do not influence distribution....
‘Rewilding’ is a nature conservation strategy gaining prominence worldwide. Established in the Northern Hemisphere, rewilding initiatives have increasingly been proposed in Argentina, but their relative merits, feasibility of implementation and accountability have lacked adequate analysis and discussion. Recently, 125
scientists and practitioners w...
The white-eared opossum, Didelphis albiventris Lund, 1840, is one of the most widely distributed South American marsupials. As currently defined, the species ranges from northeastern and central Brazil through Paraguay and central Bolivia,
all of Uruguay, and in Argentina, from the north to northern Patagonia. Previous phylogeographic analyses foun...
Documentamos 18 localidades nuevas para Cryptonanus chacoensis en seis provincias de Argentina, a partir de restos recuperados de egagrópilas de aves rapaces y material depositado en colecciones. Los registros de Santa Fe extienden hacia el oeste el área de distribución de la especie entre 9,4 km y 135 km. Teniendo en cuenta la distribución en un c...
En los últimos años se han desarrollado en Argentina distintas intervenciones relacionadas con el rewilding (o re-asilvestramiento), abarcando una variedad de especies (e.g., grandes carnívoros, ungulados, psitácidos) y ecorregiones (e.g., Chaco Húmedo y Seco, Estepa Patagónica). El reasilvestramiento es definido como una estrategia aplicada en el...
Using morphological and molecular studies, the life cycle of Versteria cuja (Cestoda: Taeniidae) was elucidated, involving subterranean rodents (Ctenomyidae) as intermediate hosts, and the lesser grison, Galictis cuja (Mustelidae), as definitive host. Metacestodes (cysticerci and polycephalic larvae) were found mainly in the liver but also in splee...
El puma Puma concolor es el depredador tope en Patagonia. Sus presas abarcan gran variedad de tamaños de mamíferos y aves con un consumo de especies exóticas, principalmente. Bartolucci et al. (2021) analizaron la dieta del puma en el Parque Nacional Los Glaciares a partir de muestras colectadas en 2004 y 2005, encontrando que la especie se aliment...
El Parque Nacional Monte León (PNML) cubre una extensión de 62.169 ha. fue creado en el año 2004, ubicado en el este de la provincia de Santa Cruz, conservando las ecorregiones Estepa Patagónica y Mar Argentino.
En general, pocos son los estudios en el área protegida, donde solo se mencionan unas pocas especies del orden Rodentia (Gil 1989) y el Si...
In Argentina, current food and land-use systems are drivers of greenhouse gas emissions, biodiversity loss, nutrient outflows, chemical pollution and water stress, while they fail to produce sustainable livelihoods for farmers and herders. Argentina must transition toward more sustainable food and land-use systems to achieve the sustainable develop...
Living American marsupials comprise ca. 130 species included in three orders, extending from northern North America (Canada–US border) to southern Argentina (48° South), with a higher richness in tropical and subtropical areas of Central and South America, declining with increasing latitude. The influence of climate throughout their evolution resul...
This is the first study analyzing the distribution of New World marsupials and their relationship to climatic zones on a continental scale. We describe the distribution at different taxonomic categories (order, subfamily, tribe, genus) and their presence within climates, and discuss these patterns considering two different processes: serendipity or...
Marmosini is the most speciose marsupial tribe of Colombia with 19 species, but basic aspects of their biology remain poorly unknown, including information on their distribution and conservation. The main objectives of this work were to study Marmosini species richness, potential distribution, and conservation throughout Colombia. To achieve this,...
Via morphological and molecular analysis, we describe a new species of taeniid from Patagonia (Argentina): Versteria cuja n. sp., parasitizing the Lesser grison Galictis cuja (Molina) (Carnivora: Mustelidae). This is the first report of a species of Versteria in Argentina and for a native mustelid. The new species (the third in the genus Versteria)...
New World marsupials belong to three different orders: Didelphimorphia, Microbiotheria, and Paucituberculata. Didelphimorphia is one of the most speciose and successful radiations of recent Neotropical mammals, while Microbiotheria and Paucituberculata were more diverse during the Tertiary and are considered relictual elements in modern faunas. Phy...
RESUMEN. En Argentina habitan 29 especies de marsupiales, pero no existen análisis sobre patrones espaciales de sus distribuciones. Estudiamos su riqueza a partir de registros puntuales (RP), y su conservación en función de las áreas protegidas y la huella humana (HH) usando mapas de distribución (MD). Calculamos el valor de conservación por especi...
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...
A noticeable aspect of metatherian evolution in South America is the influence of climatic oscillations in their macroevolutionary patterns, involving major radiations during warming phases, and extinctions and functional turnovers during cooling phases. Two aspects explain why southern metatherians were more successful than their Northern Hemisphe...
The genus Ctenomys includes a high number of taxa, with at least ten species from Patagonia and three recently described species for northeastern Chubut Province (Argentina). Ctenomys sociabilis is a social species of the genus Ctenomys and is currently distributed in the surrounding area of Sierra Cuyin Manzano (Neuquén Province), with a recently...
El monte de llanuras y mesetas (de aquí en más monte) es una de las dieciocho regiones natu-rales o ecorregiones de nuestro país y confor-ma una diagonal árida que se extiende desde el sur de San Juan hasta la costa atlántica de Chubut, Río Negro y el sur de Buenos Aires. Esta diagonal es a su vez parte de una región mayor, denominada 'zona de tran...
Robust evaluation of the impact of biodiversity conservation actions is important not only for ensuring that conservation strategies are effective and maximise return on investment, but also to identify and celebrate successful conservation strategies. This evaluation can be retrospective (comparing the current situation to a counterfactual scenari...
Sigmodontines comprise one of the most diverse radiations of mammals. The cranial ontogeny has been studied in several mammals, but remains poorly studied in the group. We quantified the ontogenetic pattern for 22 sigmodontine species and 8 outgroups, generating partial reconstructions of ancestral allometric growth patterns, and testing the role o...
Recognizing the imperative to evaluate species recovery and conservation impact, in 2012 the International Union for Conservation of Nature (IUCN) called for development of a “Green List of Species” (now the IUCN Green Status of Species). A draft Green Status framework for assessing species’ progress toward recovery, published in 2018, proposed 2 s...
RESUMEN. Mediante trabajos de campo realizados durante la última década evaluamos la riqueza de mamíferos no voladores en la parte central de la Provincia de La Pampa. Usamos diferentes metodologías, tales como recorridas en vehículo (4 caminos principales), trampeos (en 13 sitios), recolección de egagrópilas y heces de carnívoros (en 5 sitios), en...
Marmosini species were taxonomically revised recently, however, little is known about their distribution and conservation. The aim of this research was to delimit the distribution of all species of Marmosini that inhabit Colombia, and analyze their conservation using potential distributions, protected areas, and human pressure data of the country....
The distributional range of South American marsupials is the response to evolutionary history, geology and climate, resulting in a chorology characteristic of each taxon. We integrated information for each species using the global conservation status given by the International Union for Conservation of Nature (IUCN), plus the taxonomic singularity,...
We present a systematic review of the extinct species included in the family Caenolestidae, one of the few South American metatherian groups that has survived to the present. We perform a cladistic analysis based on a data matrix consisting of all extant and extinct species that have been referred to this family, 100 morphological characters and tw...
We present a systematic review of the extinct species included in the family Caenolestidae, one of the few South American metatherian groups that has survived to the present. We perform a cladistic analysis based on a data matrix consisting of all extant and extinct species that have been referred to this family, 100 morphological characters and tw...
Eligmodontia morgani and E. typus are two small (<25 g) sigmodontine rodents that live in dry areas of southern Argentina. The species are very difficult to distinguish in the field, so their geographical delimitation has always been the subject of controversy. In this work we used sampling sites where each species has been previously identified by...
Abstract
Background: Caenolestids are a group of poorly known South American marsupials with a restricted distribution in
Páramo and Subpáramo environments of the Andes from Colombia and western Venezuela to Bolivia (represented
by the genera Caenolestes and Lestoros), and Valdivian rainforest in southern Chile (including a separate population
in C...
En este trabajo reportamos el hallazgo de restos de basura en heces de puma en el Parque Nacional Los
Glaciares (PNLG), provincia de Santa Cruz (República Argentina). Los residuos fueron encontrados en
tres heces de puma colectadas en los senderos de trekking dentro del PNLG, e incluyeron los siguientes
ítems: hilo, fósforos y dos tipos de polietil...
En esta comunicación damos a conocer cuatro nuevas localidades para la comadrejita patagónica (Lestodelphys halli), a partir del trampeo de un individuo y restos óseos recuperados de egagrópilas de lechuza de campanario (Tyto alba) provenientes del centro y oeste de la provincia de La Pampa (República Argentina). Estos nuevos registros expanden la...
En el territorio colombiano habitan al menos 35 especies de marsupiales de los órdenes Didelphimorphia y Paucituberculata. Analizamos su distribución con base en 1122 registros de presencia y las áreas de extensión de ocurrencia (EOO) tomadas de los mapas por especie de la IUCN. Identificamos, a una escala de mapa 0.5º de latitud y longitud para re...
Colombia es considerado un país megadiverso donde habitan al menos 39 especies de marsupiales, incluidos en los órdenes Didelphimorphia y Paucituberculata, cuya distribución y conservación ha sido poco estudiada. Analizamos la distribución y conservación de las especies de los géneros Marmosa (10) y Monodelphis (3) (Tribu Marmosini) presentes en Co...
We generated potential distribution models for 14 sigmodontine rodent species that inhabit the Andean–Patagonian forest region and adjacent areas, and retrieved the main climatic variables responsible for these models. Our main objective was to compare these climatic variables and the distribution patterns generated for each species, and explore th...
The specimen described herein and assigned to ‘Xyophorus’ sp. (Mammalia, Xenarthra, Tardigrada) was
collected in the locality Cerro Zeballos, northwestern Chubut Province, Argentina. The fossiliferous
sediments bearing the specimen are correlated with Collón Curá Formation. The specimen has the features
described for other members of ‘Xyophorus’ (e...
The monito del monte Dromiciops gliroides Thomas, 1894, is a marsupial endemic to the temperate rainforests ofArgentina and Chile. Studies on its phylogenetic relationships show the species is more closely related to Australian marsupialsthan to any other American taxon. The study of the palmar and plantar anatomy in this species through direct obs...
We report the first case of the dipteran Cuterebra (Oestridae, Cuterebrinae) parasitizing individuals of Marmosa (Micoureus) constantiae, which were captured near Cortaderas (Salta Province, Argentina). All the larvae presented a densely-covered integument by robust squamiform spines, and three pairs of posterior spiracular slits in a tortuous form...
En Colombia habitan dos especies de ratones runchos del género Caenolestes, cuya distribución y requerimientos ambientales son poco conocidos. Modelamos la distribución potencial de C. fuliginosus y C. convelatus a partir de 94 y 19 localidades, respectivamente. Utilizamos el algoritmo MaxEnt con 17 variables bioclimáticas y un modelo digital del t...
En las XXX Jornadas Argentinas de Mastozoología, que se realizaron en la ciudad de Bahía Blanca, un grupo de investigadores delineamos una propuesta para generar una nueva publicación de la Socie-dad Argentina para el Estudio de los Mamíferos (SAREM). Si bien varios fueron los motivos iniciales detrás de esta idea, los más importantes para noso-tro...
The middle to late Miocene Friasian sensu stricto, Colloncuran and Mayoan South American Land Mammal Ages (SALMAs) were established based on the mammals recovered from the Río Frías, Collón Curá and Río Mayo formations, respectively (southern Argentina and Chile). Records of Interatheriinae (Notoungulata) from these sediments have been known since...
We compare the main histological features of the digestive tract of three selected New World didelphid marsupials (Mammalia, Metatheria, Didelphimorphia, Didelphidae): the White‐eared Opossum Didelphis albiventris Lund, 1840, the Short‐tailed Opossum Monodelphis dimidiata Wagner, 1847, and the Patagonian Opossum Lestodelphys halli Thomas, 1921. The...
The genus Dromiciops Thomas is the only living representative of the order Microbiotheria. Throughout the history of the taxon, it was considered to comprise a continental and an insular form (D. australis and D. gliroides), a single species (D. gliroides), or, as recently described, 3 different species (D. bozinovici, D. mondaca, and D. gliroides)...
Dental anomalies have been documented in almost all mammalian orders, and include supernumerary or missing teeth, teeth with aberrant occlusal surfaces and/or roots and teeth in unusual positions. Our objectives were the description and categorization of dental anomalies in all species of the genus Caluromys. We studied 462 crania, recorded and cla...
Análisis de la dentición de Priodontes maximus
The specimen described herein and assigned to ‘Xyophorus’ sp. (Mammalia, Xenarthra, Tardigrada) was
collected in the locality Cerro Zeballos, northwestern Chubut Province, Argentina. The fossiliferous
sediments bearing the specimen are correlated with Collón Curá Formation. The specimen has the features
described for other members of ‘Xyophorus’ (e...
We summarize the configuration of plates, geographical barriers, and possible dispersal events during the Late Cretaceous–Cenozoic between North and South America, the Caribbean, Antarctica, and Australia. The arrival of metatherians in South America was a Late Cretaceous event, and probably a Maastrichtian one. There are few doubts that the first...
The early Paleocene diversity of metatherians in Tiupampan faunas of South America and the pre-Tiupampan Paleocene polydolopimorphian Cocatherium speak in favor of an earliest Paleocene or Late Cretaceous dispersal of metatherians from North America. No Late Cretaceous metatherian or eutherian mammals have been recovered to date in South America, b...
South American living metatherians are relatively inconspicuous and comprise ca. 10 % of the region’s mammal species richness. Most of them are small-sized (<150 g), with long tails and grasping hands and feet, and resemble one another in their general appearance. Individuals are solitary, nocturnal or crepuscular, and most of them are arboreal or...
Pyroclastic and epiclastic continental sediments
bearing the ‘‘fauna Astrapothericulense’’ from the Pinturas
Formation of Ameghino crop out mainly at several localities
at the upper valley of the Pinturas River and its
tributaries, northwestern Santa Cruz Province, Argentina.
These continental sediments are referred to the Burdigalian
Stage and con...
Pyroclastic and epiclastic continental sediments bearing the “fauna Astrapothericulense” from the Pinturas Formation of Ameghino crop out mainly at several localities at the upper valley of the Pinturas River and its tributaries, northwestern Santa Cruz Province, Argentina. These continental sediments are referred to the Burdigalian Stage and const...
We describe the behavior in captivity of the dusky shrew-opossum Caenolestes fuliginosus from 17 specimens captured at Finca La Martinica (Colombia), which were kept alive in plastic terraria for different periods of time (between 1 and 12 consecutive days). We found that C. fuliginosus can climb and jump well and uses its nonprehensile tail as a s...
With more than 100 species, living South American marsupials
(Mammalia, Metatheria) give only a glimpse of the much higher taxonomic and
ecological diversity acquired by metatherians throughout the Cenozoic Era. The
term Metatheria designs a taxon within Mammalia that includes not only
Marsupialia but also all therian mammals more related to Marsup...
Diversity, dietary, and body mass analyses suggest that the early Eocene represents the major radiation event in South America metatherian evolutionary history. During this period, representatives of all orders typical of the Paleogene reached their greatest diversity (i.e., “basal ameridelphians”; Polydolopimorphia Polydolopiformes, and Bonaparthe...
The Metatheria include not only marsupials but all therians more related to Marsupialia than to the Eutheria. Marsupialia is considered as a metatherian crown group including all extant marsupials, their common ancestor and all of their descendants. “Ameridelphia” is not a natural group. Australidelphia includes the Microbiotheria and all Australas...
In order to understand the timing of metatherian radiations, adaptations, and extinctions, it is important to review the variety of strongly interrelated contexts that defined them. (1) During the Cenozoic Era, global climates shifted from Greenhouse to Icehouse conditions; this major change was quite obvious by the Eocene–Oligocene boundary (ca. 3...
Dental anomalies have been investigated and reported for most orders of mammals,including marsupials. Previous works in Didelphis albiventris Lund,1840 only described one kind of malformation or just a few observations from some collections,thus the type and presence of anomalies for this species was underestimated. The aim of this contribution is...
This book summarizes major aspects of the evolution of South American metatherians, including their epistemologic, phylogenetic, biogeographic, faunal, tectonic, paleoclimatic, and metabolic contexts. A brief overview of the evolution of each major South American lineage ("Ameridelphia", Sparassodonta, Didelphimorphia, Paucituberculata, Microbiothe...
The Patagonian opossum (Lestodelphys halli), the southernmost living marsupial, inhabits dry and open environments, mainly in the Patagonian steppe (between ~32°S and ~49°S). Its rich fossil record shows its occurrence further north in Central Argentina during the Qua-ternary. The paleoenvironmental meaning of the past distribution of L. halli has...
The vespertilionid bat Histiotus macrotus occurs in western Argentina, central regions of Chile and south of Argentina and Chile, and it may be also present in Bolivia and southern Peru. In this work, we analyzed the geographic and potential distribution of a poorly known species of South American bat. As a tool, environmental niche modeling has be...
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The diversity of items consumed by modern didelphids, varying from mostly fruits in Caluromys Allen to mostly small vertebrates in Lutreolina O. Thomas, may cause changes in molar size and shape. We evaluated the morphometric variation of the first and third upper and lower molars of 16 genera of didelphid marsupials, with the aim of assessing the...
The patterns of development and skull ontogeny in caenolestids have been poorly studied, resulting in a limited knowledge. In this work, we report and compare the allome-tric growth trends of 15 variables in the three living groups of the Family Caenolestidae, represented by Caenolestes fuliginosus, Lestoros inca, and Rhyncholestes raphanurus. We a...
Argentinean “zorros de campo” are currently included in two species: Lycalopex griseus and L.
gymnocercus. Lycalopex gymnocercus lives in northern Patagonia and in most of central and northern Argentina. Lycalopex griseus is smaller and lives in Patagonia and throughout western Argentina. A previous traditional morphometric study using cranio-denta...
Hibernation and daily torpor are two distinct forms of torpor, and although they are related, it is not known how and in which sequence they evolved. As the pattern of torpor expressed by the oldest marsupial order the opossums (Didelphimorphia) may provide insights into the evolution of torpor, we aimed to provide the first quantitative data on th...
Caenolestids are a group of poorly known South American marsupials with a restricted distribution in paramo and subparamo environments of the Andes from Colombia and western Venezuela to Bolivia (represented by the genera Caenolestes and Lestoros), and in Valdivian rain forest in southern Chile and Argentina where a single species (Rhyncholestes ra...