Contents:

Marsupials, xenarthrans, shrews, and bats. University of Chicago Press , Chicago, Illinois. Species limits and phylogenetic relationships in the didelphid marsupial genus Thylamys based on mitochondrial DNA sequences and morphology. Hidden diversity in the Andes: Molecular Phylogenetics and Evolution Arrangement of the families of mammals with analytical tables. Smithsonian Miscellaneous Collections, Analysis of cytochrome- b nucleotide diversity confirms a recent range expansion in Calomys musculinus Rodentia, Muridae.

Revista Brasileira de Zoologia On the natural arrangement of vertebrose animals. London Medical Repository 15 1: Description of a new species of Didelphys from Demerara. Annals and Magazine of Natural History, Series 5, 4: Molecular systematics of mouse opossums Didelphidae: American Museum Novitates Speciation in Amazonian forest birds. Multivariate analysis of variance and covariance. Bayesian inference of phylogeny and its impact on evolutionary biology. Probing evolutionary patterns in Neotropical birds through DNA barcodes. Mittelgrosse Didelphyden Lutreolina u.

Journal of Mammalogy

Didelphidae de la sierra de Lema, Venezuela. Bulletin of Biological Assessment Observations on the mammals of Tucuman Province, Argentina. Annals of Carnegie Museum Systematics and natural history of marsupials from Argentina. Fort Hays Studies, Special 1. University of Oklahoma Press , Norman. Systematics, distribution, and ecology of the mammals of Catamarca Province, Argentina.

Observations on the distribution and ecology of the mammals of Salta Province, Argentina. Revista de Investigaciones Agropecuarias Los marsupiales de la Argentina. Didelphia ou Mammalia ovovivipara. Revista Museo Paulista Trichostrongyloidea from Thylamys venustus cinderellus and Lutreolina crassicaudata Marsupialia: Didelphidae in the northwest of Argentina. Bird speciation in subtropical South America in relation to forest expansion and retraction. Quaternary vegetational changes and bird differentiation in subtropical South America.

Molecular phylogeography and species limits in rainforest didelphid marsupials of South America. Phylogeographic patterns of trans-Amazonian vicariants and Amazonian biogeography: Journal of Biogeography Reproduction and dental age classes of the little water opossum Lutreolina crassicaudata in Buenos Aires, Argentina.

Systematic relationships of the living and Neocenozoic American opossum-like marsupials suborder Didelphimorphia , with comments on the classification of these and of the Cretaceus and Paleogene New World and European metatherians. Color standards and color nomenclature.

Published by the author , Washington, D. Stratigraphy of late Miocene and Pliocene deposits of the province of Catamarca Argentina , with notes on the faunae. Accessed 31 October Phylogeny and evolution of the Neotropical rodent genus Calomys: Locomotion in aquatic, terrestrial, and arboreal habitat of thick-tailed opossum, Lutreolina crassicaudata Desmarest, New species of Monodelphis Didelphimorphia: Didelphidae from Peru, with notes on M.

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Analysis of cytochrome- b nucleotide diversity confirms a recent range expansion in Calomys musculinus Rodentia, Muridae. Bulletin of Biological Assessment Brazo Largo MLP Didelphidae , a phylogenetic puzzle from the Chaco of northern Argentina. Annals and Magazine of Natural History Series 9, First upper premolar shorter than P2 and P3, which lack the lateral and lingual cingulum observed in L.

Marsupials, xenarthrans, shrews, and bats A. Molecular Biology and Evolution Diversity and distribution of the mouse opossums of the genus Thylamys Didelphimorphia, Didelphidae in northeastern and central Argentina. A collection of mammals from eastern Buenos Ayres, with descriptions of related new mammals from other localities. Annals and Magazine of Natural History Series 8, 5: The geographical races of Lutreolina crassicaudata. Annals and Magazine of Natural History Series 9, The Clustal X Windows interface: Nucleic Acids Research Dental age classes in Marmosa incana and other didelphoids.

Didelphidae , a phylogenetic puzzle from the Chaco of northern Argentina. Phylogenetic studies on didelphid marsupials II. Phylogenetic relationships and classification of didelphid marsupials, an extant radiation of New World metatherian mammals. A new species of Marmosops Marsupialia: Didelphidae from the Pakaraima Highlands of Guyana, with remarks on the origin of the endemic Pantepui mammal fauna. Dorsum including head of the new species brownish olive, with some hairs dark olive-buff, which are more abundant on the sides. Venter orange-cinnamon, which extends to the throat, cheeks, and posterior parts of legs.

Hair of venter with dark gray bases absent; hairs on sides with gray bases. Hairs of dorsum gray-based, but those of the sides and venter are unicolored. Vibrissae well developed, the longest extended almost to the ear level. Ears rounded, uniform and slightly furred with brown short hairs. Hand dorsally darker than the rest of the arm; manual claws longer than apical pads of digits. Forelimbs short and bicolored, dark olive-buff anteriorly, but posteriorly with the same color as the dorsum. Strong claws except in the hallux surpassing the tips of the toes; 4 plantar tubercles are present: Tail thick, furred dorsally and ventrally.

Proximal one-third of the tail with long hairs, similar to dorsum in general coloration although more cinnamon , and the remaining with short hairs blackish brown except the distal tip, which is orange-citrine. Caudal scales arranged in spiral series, each scale with 4 subequal hairs. Cranium robust, with similar general characteristics to that of L.

Rostrum wide; short nasals, with lateral margins not pointed, and posteriorly not reaching the level of the supraorbital process, but beyond the anterior margin of orbits, and anteriorly not beyond the I1 level. Premaxilla without rostral process, caudally extended to the canine level, although without the wedge between nasal and maxillar, as observed in L.

Paracanine fossa well developed; its anterior half limited by the premaxilla and the posterior half limited by the maxillae. Infraorbital foramen well developed and located at the P2 level. Lacrimal well exposed laterally, with 2 small lacrimal foramina in each side. No contact between nasal and lacrimal due to the contact between maxillar and frontal. Postorbital process small and not pointed, even lesser than those observed in L. Temporal ridge poorly developed, and convergent anteriorly to a point anterior to frontoparietal suture, in a not strongly developed sagittal crest which also involves the parietals.

Postorbital breadth similar to the interorbital breadth. This character clearly differentiates the new species from L. Infraorbital foramen well developed at the level of P2. Lacrimal anteriorly extended outside from the orbit, beyond the level of the frontomaxillar suture. Infraorbital process present, located at the same level as the last upper molar. Postglenoid process well developed, but less than in L. In ventral view, pterygoid region narrow. Although the nuchal crest is evident, it is not as strongly developed as in L.

Mastoid process well developed, as well as paraoccipital process, which is clearly oriented in a posteroventral direction.

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As observed in L. Palate slender, with incisive foramen extended from I3 to upper canine level, maxillopalatine fenestra from M1 to M3, and palatine fenestra placed on M4 level. Palatine torus well developed, inflected ventrally, more or less straight with projecting lateral corners. Tympanic wing of the alisphenoid globose, with a medial lamina of the alisphenoid, which defines a secondary foramen ovale, located at the same level as the carotid canal. Petrosal ventrally exposed, with a small tympanic process, which does not contact the tympanic wing of the alisphenoid.

Exoccipital contacts the rostral tympanic process, whereas in L. The basioccipital presents a midline Y-shaped crest pharyngeal tubercle forming the medial border of paired oval muscular depressions. Mandible slender, with mandibular condyles laterally expanded, coronoid processes wide, and angular processes short. Mental foramina well developed and placed at the same level as the small diastema separating lower p1—p2. Upper incisive similar to L. The 1st element taller than the remaining, which are asymmetrical and with their anterior cutting edge longer than the posterior one.

Canines well developed, without additional cusps. First upper premolar shorter than P2 and P3, which lack the lateral and lingual cingulum observed in L. Anterior margin of the 2nd upper premolar straight, not convex as in L. Anterolabial cingulum present but not well developed.

Stylar shelf broad, with stylar cusps B and D more developed; paracristae becoming sequentially more developed from M1 to M4. Ectoflexus of M3 well developed, and protocone of this element and M4 notably bladelike, compared with the more bulbous protocone of M1 and M2. Metacone is taller than paracone and protocone, which are subequals. Lower incisive without accessory cusps. The 1st element wider and taller than the remaining.

Canines well developed, without accessory cusps. First lower element smaller and separated from p2 by a short diastema. Second premolar taller and all elements with a posterior cingulum. Second and 3rd premolar with an inconspicuous anterior cingulum. Protoconid taller than metaconid and paraconid.

In the 1st and 2nd element, the metaconid is slightly taller than paraconid, but in p3 and p4 both cusps are subequals. Talonid of the last lower molar reduced, but as strongly as observed in L. The northern distributional limit of L. Although there are some isolated records of Lutreolina from northern Bolivia Beni Department—see Anderson Given this, we assign those populations from Beni, as well as those from Pampas del Heath, southern Peru Luna et al. It remains an open question if these populations belong to L.

If this is correct, this population could represent the northernmost locality of L. Unfortunately, Krumbiegel did not detail the specimens that constitute the basis of this record; as such, it is not possible to study them to assess their morphology.

Additional survey efforts in this area of montane forests are needed to test if Lutreolina inhabits it, and if this proves to be the case, to see if that population belongs to the new species here described. On the other hand, the southern limit of L. Although Brown cited Lutreolina further south, in Catamarca Province, Argentina, living Lutreolina specimens have not been registered for that province Mares et al. The records from Catamarca Province cited by Brown correspond to fossil specimens see Marshall ; Flores Moreover, fossils coming from such deposits in northwestern Argentina Huayquerian— Riggs and Patterson correspond to a species of the extinct genus Hyperdidelphys i.

However, because surveys at the southern end of the Yungas forests are still scarce, future fieldwork may show that L. Dedicated to the memory of Elio Massoia — , author of numerous key contributions that significantly expanded our knowledge of the alpha diversity of South American mammals. In particular, Massoia was among the 1st researchers noticing the distinctiveness of the specimens of Lutreolina from the Yungas forests.

We suggest for the new species the common name Massoia's lutrine opossum. General view of the environment at Remanso del Gallego, the collecting locality of the type and paratype specimens of Lutreolina massoia, new species. Massoia's lutrine opossum is crepuscular and nocturnal, feeding mostly on small mammals, fish, and invertebrates, but it also consumes bird eggs, and fruits Mares et al.

Olrog suggested that the high abundance of this species in Cerro Calilegua, Jujuy Province, for certain years, could be related to the population peaks of sigmodontine rodents. The home ranges of 2 specimens in Tucuman Province were found to be m 2 and m 2 Mares and Braun ; fide Cajal The nematodes Travassostrongylus yungaensis and Hoineffia simplicispicula are known to parasitize the gut of L. Presently, the Yungas are extremely fragmented and under great anthropic pressure e. Taxonomic and biogeographic considerations.

Similarly low values of interspecific variation have been observed in other pairs of sister species in the tribe Didelphini, such as Didelphis marsupialis and D. Interestingly, comparisons involving species of small didelphid genera e. The cause of this difference in observed genetic distance between large and small didelphids is unclear. Futures studies would clarify if it is due to cryptic species diversity e. The Cytb genealogy of Lutreolina shows that populations from the lowlands of Argentina, Brazil, Paraguay, and Uruguay lack phylogeographic structure.

As such, no haplogroups match the distributions of L. This result supports the scheme of Marshall , Stein and Patton , [] , and Gardner , who considered a single subspecies L. Nevertheless, Graipel et al. Unfortunately, our molecular analysis does not include sequences from populations from northern South America, which are assigned to L. This subspecies inhabits open environments northern savanna grasslands with similar landscapes to those from the southern pampasic regions Cabrera and Willink where L.

However, our morphometric analyses indicated that specimens of turneri are mostly distinct from L. In addition, the general skull morphology of L. However, until genetic data of specimens assigned to turneri are analyzed, we prefer not to innovate in relation to the taxonomic status of this form. Lutreolina shows a complex distribution pattern with different degrees of disjunction.

Even though species of Lutreolina present affinity and dependence for humid environments e. Other mammal groups e. For the moment, it is not clear whether the current distribution of L. A comprehensive phylogeographic study of L. Our sampling for L. As in other taxa that occur in northeastern and eastern Argentina, southeastern Brazil, Paraguay, and Uruguay e.

This fact does not necessarily imply that the occurrence of L. Additional studies are needed to further assess the biogeographic history of L. Isolated localities in the arid region of central-western Argentina were mentioned for L. For instance, Cabrera and subsequent authors e. Our examination of this specimen indicates that it corresponds to a breeding specimen of Didelphis albiventris. In this regard the specimen of L. As such, no specimen of Lutreolina has been recorded for the arid Chaco region, suggesting a geographic gap between L. The Chacoan distributional gap seen in Lutreolina in southern South America mirrors that of several other mammals that have counterparts at both humid sides of the dry Chaco i.

Some examples are Sciurus ignitus and S. Similarly, several species or subspecies pairs of birds show the same distributional pattern Nores Similar to what we found for Lutreolina in southern South America, the passerine species Thamnophilus ruficapillus showed allopatric mitochondrial lineages structured geographically in the same manner Kerr et al.

Nores , suggested that most of these bird species pairs have origins prompted by climatic changes that caused vegetation expansion along the Pilcomayo and Bermejo rivers, allowing ancestral bird species to cross the dry Chaco. Then, when forests retreated to their current distribution, isolated populations differentiated, leading to the patterns of diversity observed today. Future phylogeographic studies would clarify if this model which has been criticized by da Silva [] fits the history of L. Finally, it is worth noting that the alpha taxonomy of didelphids has greatly changed in the last decade.

Several new species e. Similarly, the status of several already available specific e. As such, the description of L. We expect this trend to continue with the same intensity for the next decade. Voss shared with us key unpublished observations on specimens of the new species.

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Pine, and the other members of the Nomenclature Committee of the American Society of Mammalogists assisted us on nomenclatorial issues. Part of the tissue samples analyzed were provided by L. Salazar-Bravo made unpublished Cytb sequences available. Some of the DNA sequences were generated in the laboratory of E. Barquez CML ; A. Olivares MLP ; M. Dunnum MSB ; and P. Myers UMMZ allowed access to collection specimens under their care. Ortiz provided photographs of live or museum specimens.

Localities are listed in alphabetic order. GenBank accession numbers for cytochrome-b gene DNA sequences are provided between square brackets [ ] next to collection numbers. Lutreolina crassicaudata crassicaudata El Pescado MLP El Cedro MLP Brazo Largo MLP Lutreolina crassicaudata turneri 4. Oxford University Press is a department of the University of Oxford.

It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide. Sign In or Create an Account. Close mobile search navigation Article navigation. Angel Gallardo , Buenos Aires, Argentina. Abstract This study presents the most comprehensive systematic revision of the genus Lutreolina to date, by means of genetic mitochondrial DNA of 22 specimens and morphologic assessment of specimens evidence.

Didelphimorphia , Didelphini , marsupial , Massoia's lutrine opossum , taxonomy , South America , Yungas. View large Download slide. Phylogeography of Loxodontomys micropus with comments on the alpha taxonomy of Loxodontomys Cricetidae: Phylogenetic relationships and phylogeographic patterns in Monodelphis Didelphimorphia: Taxonomy of the southernmost populations of Philander Didelphimorphia, Didelphidae , with implications for the systematics of the genus.

Can avian distribution patterns in northern Argentina be related to gallery-forest expansion—retraction caused by Quaternary climatic changes? Systematics of the subgenus of mouse opossums Marmosa Micoureus Didelphimorphia, Didelphidae with noteworthy records from Paraguay.