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Anderson Feijo - One of the best experts on this subject based on the ideXlab platform.
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taxonomic revision of the long nosed armadillos genus Dasypus linnaeus 1758 mammalia cingulata
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro CordeiroestrelaAbstract:Dasypus is the most speciose genus of the order Cingulata, including approximately 40% of known living armadillos. Nine species are currently recognized, although comprehensive analyses of the entire genus have never been done. Our aim is to revise the taxonomy of the long-nosed armadillos and properly define the taxa. We examined 2126 specimens of Dasypus preserved in 39 different museum collections, including 17 type specimens. Three complementary methods were applied to explore morphological datasets both qualitatively and quantitatively. Qualitative morphological variation in discrete characters was assessed by direct observations of specimens. Linear morphometric variation was based on external data and cranial measurements of 887 adult skulls. The shape and size of the skull was abstracted through two-dimensional geometric morphometric analyses of dorsal, lateral and ventral views of respectively 421, 211, and 220 adult specimens. Our results converge on the recognition of eight living species (D. beniensis, D. kappleri, D. mazzai, D. novemcinctus, D. pastasae, D. pilosus, D. sabanicola, and D. septemcinctus), and three subspecies of D. septemcinctus (D. s. septemcinctus, D. s. hybridus, and a new subspecies from Cordoba described here). Information on type material, diagnosis, distribution, and taxonomic comments for each taxon are provided. We designate a lectotype for D. novemcinctus; and a neotype for Loricatus hybridus (= D. septemcinctus hybridus).
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Skin, skull, and mandible of the holotype of Dasypus septemcinctus cordobensis new subspecies (MACN 33.20).
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Skin, skull, and mandible of the holotype of Dasypus septemcinctus cordobensis new subspecies (MACN 33.20).
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Classification of morphogroups resulting from the cross-validated discriminant analysis from linear measurements of the skull of Dasypus, with sample size (N), correct classification percentage (Correct %).
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Classification of morphogroups resulting from the cross-validated discriminant analysis from linear measurements of the skull of Dasypus, with sample size (N), correct classification percentage (Correct %).
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Skull and mandible of the Dasypus novemcinctus Linnaeus, 1758 (UFPB 744) from Paraiba, Brazil [ca. 50 km from the type locality].
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Skull and mandible of the Dasypus novemcinctus Linnaeus, 1758 (UFPB 744) from Paraiba, Brazil [ca. 50 km from the type locality].
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Lateral and dorsal view of the carapace, tail, and limbs of the holotype of Dasypus beniensis (NRM 583386).
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Lateral and dorsal view of the carapace, tail, and limbs of the holotype of Dasypus beniensis (NRM 583386).
Pedro Cordeiro-estrela - One of the best experts on this subject based on the ideXlab platform.
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Distribution of the ten morphogroups of Dasypus.
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Distribution of the ten morphogroups of Dasypus.
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Diagnostic morphometric traits for the subspecies of Dasypus septemcinctus.
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Diagnostic morphometric traits for the subspecies of Dasypus septemcinctus.
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Skull and mandible of the holotype of Dasypus beniensis (NRM 583386).
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Skull and mandible of the holotype of Dasypus beniensis (NRM 583386).
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Skull and mandible of the lectotype of Dasypus kappleri (SMN 285).
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Skull and mandible of the lectotype of Dasypus kappleri (SMN 285).
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Skull and mandible of Dasypus septemcinctus septemcinctus from Brasilia, Brazil (UNB 1475).
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Skull and mandible of Dasypus septemcinctus septemcinctus from Brasilia, Brazil (UNB 1475).
Bruce D. Patterson - One of the best experts on this subject based on the ideXlab platform.
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taxonomic revision of the long nosed armadillos genus Dasypus linnaeus 1758 mammalia cingulata
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro CordeiroestrelaAbstract:Dasypus is the most speciose genus of the order Cingulata, including approximately 40% of known living armadillos. Nine species are currently recognized, although comprehensive analyses of the entire genus have never been done. Our aim is to revise the taxonomy of the long-nosed armadillos and properly define the taxa. We examined 2126 specimens of Dasypus preserved in 39 different museum collections, including 17 type specimens. Three complementary methods were applied to explore morphological datasets both qualitatively and quantitatively. Qualitative morphological variation in discrete characters was assessed by direct observations of specimens. Linear morphometric variation was based on external data and cranial measurements of 887 adult skulls. The shape and size of the skull was abstracted through two-dimensional geometric morphometric analyses of dorsal, lateral and ventral views of respectively 421, 211, and 220 adult specimens. Our results converge on the recognition of eight living species (D. beniensis, D. kappleri, D. mazzai, D. novemcinctus, D. pastasae, D. pilosus, D. sabanicola, and D. septemcinctus), and three subspecies of D. septemcinctus (D. s. septemcinctus, D. s. hybridus, and a new subspecies from Cordoba described here). Information on type material, diagnosis, distribution, and taxonomic comments for each taxon are provided. We designate a lectotype for D. novemcinctus; and a neotype for Loricatus hybridus (= D. septemcinctus hybridus).
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Distribution of the ten morphogroups of Dasypus.
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Distribution of the ten morphogroups of Dasypus.
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Diagnostic morphometric traits for the subspecies of Dasypus septemcinctus.
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Diagnostic morphometric traits for the subspecies of Dasypus septemcinctus.
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Skull and mandible of the holotype of Dasypus beniensis (NRM 583386).
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Skull and mandible of the holotype of Dasypus beniensis (NRM 583386).
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Skull and mandible of the lectotype of Dasypus kappleri (SMN 285).
2018Co-Authors: Anderson Feijo, Bruce D. Patterson, Pedro Cordeiro-estrelaAbstract:Skull and mandible of the lectotype of Dasypus kappleri (SMN 285).
Monica Papes - One of the best experts on this subject based on the ideXlab platform.
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Climatic Similarity of Extant and Extinct Dasypus Armadillos
2017Co-Authors: Xiao Feng, Teresa Cristina S. Anacleto, Monica PapesAbstract:The similar geographic distributions of an extinct ( Dasypus bellus ) and an extant ( D. novemcinctus ) armadillo species have long been of interest to scholars because of the unresolved phylogeny. The relationship between the two species has been investigated through morphological and phylogenetic studies, whereas the ecological perspective has been overlooked, the importance of which is more and more acknowledged in speciation events. Here, we used ecological niche models to study the climatic niche similarity of three species of Dasypus ( D. bellus , D. novemcinctus , and D. kappleri ) and provide new insights on the relationship among them. The climatic niche similarity was compared in two ways: hindcast of ecological niche models based on occurrences and climatic layers, and direct niche boundary comparison along bioclimatic axes. The fossil records of D. bellus were not predicted suitable by the ecological niche models of the two extant armadillos. The direct comparison of niche boundary showed that D. bellus lived in colder and relative dryer climates, with high temperature variation and low precipitation variation. Our results did not support the previously assumed ecological similarity of D. bellus and D. novemcinctus based on their geographic distributions and emphasized the possibility of a cold adapted characteristic of the life history of D. bellus .
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hiding in a cool climatic niche in the tropics an assessment of the ecological biogeography of hairy long nosed armadillos Dasypus pilosus
2017Co-Authors: Xiao Feng, Mariela C. Castro, Karen Mcbee, Monica PapesAbstract:The hairy long-nosed armadillo (Dasypus pilosus) is endemic to the Andes in Peru and rarely studied, thus more investigations are needed. To gain a better understanding of this species’ distributio...
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ecological niche modelling confirms potential north east range expansion of the nine banded armadillo Dasypus novemcinctus in the usa
2015Co-Authors: Xiao Feng, Monica PapesAbstract:The distribution of the nine banded armadillo (Dasypus novemcinctus), the only species in the family Dasypodidae found in the USA, has expanded greatly since the species was first recorded in southern Texas in 1849. Currently, the range of D. novemcinctus includes 15 states in the USA. Previous studies on the geographical expansion of this species, based on physiological experiments and distribution surveys, revealed a possible western moisture limit, a northern temperature limit, and potential north-eastward range expansion in the USA. We applied an ecological niche modelling approach and produced a potential distribution map of D. novemcinctus with comparable western (102 °W) and northern (40 °N) limits, and confirmed the possibility of further north-east range expansion to climatically suitable areas in the USA.
Mariela C. Castro - One of the best experts on this subject based on the ideXlab platform.
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hiding in a cool climatic niche in the tropics an assessment of the ecological biogeography of hairy long nosed armadillos Dasypus pilosus
2017Co-Authors: Xiao Feng, Mariela C. Castro, Karen Mcbee, Monica PapesAbstract:The hairy long-nosed armadillo (Dasypus pilosus) is endemic to the Andes in Peru and rarely studied, thus more investigations are needed. To gain a better understanding of this species’ distributio...
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comparative histology and ontogenetic change in the carapace of armadillos mammalia dasypodidae
2015Co-Authors: C M Krmpotic, Mariela C. Castro, Alfredo Armando Carlini, Martin Ricardo Ciancio, A C Scarano, Claudio Gustavo BarbeitoAbstract:Among extant mammals, the presence of osteoderms is limited to armadillos (Xenarthra, Dasypodidae), being one of its distinctive features. The osteoderms are articulated to form a carapace that covers their body dorsally. In this paper we study the integumentary structures of the armadillos Chaetophractus vellerosus, Chaetophractus villosus, Euphractus sexcinctus, and Zaedyus pichiy (Euphractinae), Dasypus hybridus, and Dasypus novemcinctus (Dasypodinae) within a comparative framework, aiming to identify patterns common to the family and to the subfamilies Dasypodinae and Euphractinae, as well as peculiarities of each species. Differences between the two subfamilies were observed in the dorsal integument, related to the production of blood cells and the mobility of the carapace. The Euphractinae present more numerous and larger cavities filled with adipose tissue in the osteoderms, as well as more marginal follicles than the Dasypodinae. These provide thermal insulation that could be related to their distribution in cooler climates. The sebaceous glands associated with surface follicles are also more developed in the Euphractinae and could be related to preventing the desiccation of the cornified scales in arid climates.
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A new Dasypodini armadillo (Xenarthra: Cingulata) from San Gregorio Formation, Pliocene of Venezuela: affinities and biogeographic interpretations
2014Co-Authors: Mariela C. Castro, Alfredo A. Carlini, Rodolfo Sánchez, Marcelo R. Sánchez-villagraAbstract:We describe PlioDasypus vergelianus gen. et sp. nov., a Dasypodini armadillo from the middle Pliocene of Venezuela (Vergel Member, San Gregorio Formation). Although scarce, the remains are remarkable because of their geochronologic proximity to the main phase of Great American Biotic Interchange (GABI). The cladistic analysis conducted reveals that PlioDasypus groups with Dasypus and both are sister taxa of Propraopus , whereas AnaDasypus is at a basal position. With respect to the records of tribe Dasypodini, after its oldest representative ( AnaDasypus , middle and late Miocene), the chronologically subsequent form is Pl. vergelianus (middle Pliocene), followed by Dasypus bellus in higher northern latitudes (late Pliocene), and then by widespread occurrences in the Pleistocene of North America ( D. bellus ) and South America ( Propraopus , Dasypus punctatus , and Dasypus novemcinctus ). Thus, we infer that Dasypus differentiated in the late Pliocene at low latitudes in the northern South America. It leads to two alternative hypotheses of dispersal: (a) some early Dasypus remained cryptically in South America until the Pleistocene, whereas others dispersed to North America between 2.2 and 2.7 Ma, or (b) they dispersed to North America subsequently to the emersion of the Panamanian isthmus and D. bellus differentiated there; later, during the Pleistocene, D. bellus entered South America and experienced speciation. The same process of re-ingression has been proposed to other xenarthrans, breaking with the traditional assumption that the GABI was unidirectional.
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the armadillo propraopus sulcatus mammalia xenarthra from the late quaternary of northern brazil and a revised synonymy with propraopus grandis
2013Co-Authors: Mariela C. Castro, Leonardo Dos Santos Avilla, Mila L Freitas, Alfredo Armando CarliniAbstract:Abstract This paper describes new remains of Propraopus sulcatus from a late Quaternary cave deposit located in Aurora do Tocantins, northern Brazil. Propraopus was recorded in numerous late Pleistocene–early Holocene sites in South America, and its inclusiveness has been long debated. In order to address some of the controversial taxonomic questions, the osteoderms of P. sulcatus were qualitatively and quantitatively compared to those of related nominal species ( Propraopus grandis , Propraopus magnus , Dasypus bellus , and Dasypus punctatus ); special attention was given to the former due to the debated synonymy between both taxa. Analyses reveal that there is no morphologic, spatial, or temporal discontinuity between P. sulcatus and P. grandis . Adopting morphologic, associational, and distributional criteria to define morphospecies, we believe it is impossible to clearly separate both nominal entities. As a consequence, in agreement with previous studies, we favor their synonymization. P. sulcatus has nomenclatural priority over P. grandis and should be the valid name for the species. The scarce analyzed remains referred to P. magnus show concordant size and morphology with P. sulcatus , but the analysis of more complete material is essential to determine its synonymization. Finally, we revised and updated the geochronologic distribution of Propraopus .
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A new species of Dasypodidae (Xenarthra: Cingulata) from the late Miocene of northwestern South America: implications in the Dasypodini phylogeny and diversity
2013Co-Authors: Alfredo Armando Carlini, Mariela C. Castro, Richard H. Madden, Gustavo Juan Scillato-yanéAbstract:A new species of dasypodid armadillo (Xenarthra, Cingulata), AnaDasypus aequatorianus, from the late Miocene of Ecuador is described. The remains were collected in sediments of the Letrero Formation, Nabon Basin, which is part of several intermontane basins related to Andean uplift. The genus represents the oldest record of Dasypodini, which also encompasses Propraopus (Pleistocene–early Holocene) and Dasypus (?Miocene–Recent). The new species is based on several osteoderms, which show more derived features than AnaDasypus hondanus, from the middle Miocene of Colombia. In order to test the affinities of A. aequatorianus within Dasypodini, we conducted a cladistic analysis of 24 morphological characters for 10 taxa. The most parsimonious tree supports the generic attribution of the new species and places AnaDasypus basal to Propraopus and Dasypus, agreeing with the stratigraphic evidence. The faunas from tropical Andean areas differ noticeably from the better-known assemblages of the classic South American...
