DOCSLIB.ORG

Redalyc.Higher-Level Molecular Phylogeny of Snakes: Conflicts And

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Redalyc.Higher-Level Molecular Phylogeny of Snakes: Conflicts And Darwiniana ISSN: 0011-6793 [email protected] Instituto de Botánica Darwinion Argentina Gobbi Grazziotin, Felipe; Zaher, Hussam; Ferrarezzi, Hebert; Klaczko, Julia; Bonatto, Sandro L.; Wilkinson, Mark Higher-level molecular phylogeny of snakes: conflicts and congruence Darwiniana, vol. 45, núm. Sup, noviembre, 2007, pp. 17-19 Instituto de Botánica Darwinion Buenos Aires, Argentina Available in: http://www.redalyc.org/articulo.oa?id=66909908 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative VII Reunión Argentina de Cladística y Biogeografía. Simposio “Problemas Empíricos” compararon los soportes de los grupos para "D" y Goloboff, P. A. 1993. Estimating character weights during tree para el "set" de datos combinados "C+D" para search. Cladistics 9: 83-91. Goloboff, P. A., J. Farris & K. Nixon. 2003a. T.N.T. Tree Analysis evaluar el aporte de los caracteres continuos al Using New Technology. Program & documentation, available análisis. Cuando se agregan los caracteres conti- from the authors, and at http://www.zmuc.dk/public/phylogeny/tnt nuos existe un aumento global de 22 en la diferen- Goloboff, P. A., M. Källersjö, B. Oxelmann, M. Ramírez & C. cia de frecuencias, mostrando que la inclusión de Szumik. 2003b. Improvements to resampling measures of group support. Cladistics 19: 324-332. los caracteres continuos otorga soporte adicional a Goloboff, P. A., C. I. Mattoni & A. S. Quinteros. 2006. Conti- la topología. Se concluye que los caracteres verte- nuous characters analyzed as such. Cladistics 22: 1-13. brales continuos de serpientes resultan filogenéti- Johnson, R. G. 1955. The adaptive and phylogenetic significan- camente informativos y se recomienda su inclu- ce of vertebral form in snakes. Evolution 9: 367-388. Lee, M. S. Y. & J. D. Scanlon. 2002. Snake phylogeny based on sión como tales en análisis cladísticos. osteology, soft anatomy and ecology. Biol. Rev. 77: 333-401. Rage, J. C. 1984. Serpentes, en: P. Wellnhofer (ed.), Handbuch der Paläoherpetologie, Tomo 11, xii + 80 pp. Stuttgart/New York: Gustav Fischer Verlag. BIBLIOGRAFÍA Rieppel, O., A. G. Kluge & H. Zaher. 2002. Testing the phylo- genetic relationships of the Pleistocene snake Wonambi Apesteguía, S. & H. Zaher. 2006. A Cretaceous terrestrial naracoortensis Smith. J. Vertebr. Paleontol. 22: 812-829. snake with robust hindlimbs and a sacrum. Nature 440: Rohlf, J. F. 2004. Tps Dig 1.40. State University of New York, 1037-104. Stony Brook, New York. http://life.bio.sunysb.edu/morph/. Auffenberg, W. 1963. The fossil snakes of Florida. Tulane Stud. Szyndlar, Z. 1984. Fossil snakes from Poland. Acta Zool. Cra- Zool. 10: 131-216. cov. 28: 1-156. HIGHER-LEVEL MOLECULAR PHYLOGENY OF SNAKES: CONFLICTS AND CONGRUENCE Felipe Gobbi Grazziotin1,2,3, Hussam Zaher2, Hebert Ferrarezzi4, Julia Klaczko2, Sandro L. Bonatto3, Mark Wilkinson5 1São Paulo State University, Brazil; [email protected] (author for correspondence). 2Museum of Zoology of São Paulo University, Brazil. 3Pontifical Catholic University of Rio Grande do Sul, Brazil. 4Butantan Institute, Brazil. 5Natural History Museum, United Kingdom. The monophyly of snakes can be considered a years, a significant number of studies exclusively well-corroborated hypothesis. However, phyloge- based on DNA sequence analyses produced phylo- netic relationships among the major groups of sna- genies that conflict in several respect with some of kes remain unclear, despite the recent debate on the clades traditionally recognized by morphologi- snake origins and evolution. Important disagree- cally based analyses. Although these studies have ments persist on several phylogenetic issues, with generated a considerable amount of comparative contrasting results emerging from both molecular data to snake phylogeny, the complete information and morphological analyses. The most relevant produced cannot be satisfactorily compared, issues are: 1) the sister-group relationships of sna- because several taxa used by some studies were kes within Squamates, 2) the phylogenetic posi- not included in others, and data sets for some key tion of the fossil snakes Pachyrhachis, Haasio- taxa are missing for nearly all approaches. We pre- phis, Eupodophis, Dinilysia, and Wonambi, 3) the sent here a molecular phylogenetic analysis of monophyly of the macrostomatans and Tropido- snake interrelationships based on sequences from phiidae, 4) the interrelationships of booid lineages, nine genes (12S, 16S, cytb, nd4, c-mos, RAG1, and 4) the sister-group relationships of caenophi- 28S, NT3, BDNF) comprising a total of 10,666 dians within macrostomatan snakes. In the last few bps and 4,638 parsimony informative sites for 17 DARWINIANA 45(suplemento) 14-23. 2007 Fig. 1. Phylogenetic tree based on the total evidence approach showing the relationship among the higher families of Squamata. Numbers above branches are Bremer and Bootstrap values, respectively. 18 VII Reunión Argentina de Cladística y Biogeografía. Simposio “Problemas Empíricos” seventy Squamate taxa representing all higher the clade "Amerophidia" is not statically suppor- groups of snakes and lizards. Our results show a ted and should not be recognized (Table 1). On the clear saturation sign for some genes (mitochon- other hand, the nested position within higher drial genes cytb and nd4) and an inconsistent pat- macrostomatans of the clade formed by Cylindro- tern where almost all genes produce an idiosyncra- phis+Anomochilus+Uropeltinae (microstomata tic tree in a Maximum Parsimony approach. minus Anilius) is statistically well supported Depending on the method used to construct the (Table 1). Finally, we performed a total evidence matrix (DNA, Amino Acids, mitochondrial or nuclear DNA, etc), different trees were produced, Table 1. Results of Kishino-Hasegawa test for molecu- although some topologies had been always recove- lar data. red. Among these topologies, three of them repre- Tree Length Length diff P* sent singular results that are very similar to the MP tree 32117 (best) molecular results published in the last few years Microstomata 32209 92 <0.0001* and, in particular, supports the paraphyly of Paraphiletic 32124 7 0.3994 Macrostomatan and Anilioid snakes and the fami- "Amerophidia" lies Boidae and Erycidae, four traditionally recog- nized clades in morphological studies. Additio- nally, our molecular results also suggest that the analysis (TBR search under 100 random addition family Tropidophiidae and the anilioid genus Ani- trees conducted using Maximum Parsimony in lius form a monophyletic assemblage, recently PAUP*4) where the Boinae and Erycinae are reco- named formally as "Amerophidia" by Vidal et al. vered as monophyletic and the "Amerophidians" (2007). We suggest that some of the conflicting are rejected as a clade (Fig. 1). A clearer picture of results obtained in molecular studies, including snake phylogeny would be possible only through a ours, can be interpreted as a problem of taxon sam- total evidence approach that includes morphology pling that produce spurious signals due to the and fossil information. relictual condition of the extant snake fauna (with the notable exception of Colubroids), which repre- sents only a small and heterogeneous portion of BIBLIOGRAPHY the past diversity of the group. In order to test the molecularly supported clades, we performed a Vidal, N.; A. S. Delmas & S. B. Hedges. 2007. The higher-level series of Kishino-Hasegawa tests implemented in relationships of alethinophidian snakes inferred from seven nuclear and mitochondrial genes. R. W. Henderson and R. PAUP*4 using constrained topologies to reprodu- Powell (eds.), Biology of the boas and pythons. Eagle ce the preferred morphological tree. It resulted that Mountain Publishing, Eagle Mountain, Utah. Pp. 27-33. FILOGENIA DE CHARACIDAE (TELEOSTEI, CHARACIFORMES) Y OPTIMIZACIÓN AUTOPESADA J. Marcos Mirande Fundación Miguel Lillo, Miguel Lillo 251, 4000 San Miguel de Tucumán, Tucumán, Argentina En una filogenia de la familia Characidae caracteres. Las optimizaciones bajo OA son cal- (Mirande, en prep.) el autor realizó un análisis culadas heurísticamente y son más lentas que bajo pesos implicados (PI) ["Implied weighting"; bajo pesos iguales o implicados; aquí se descri- (Goloboff, 1993)] y optimización autopesada ben las estrategias utilizadas para analizar esta (OA) ["Self-weighted optimization"; (Goloboff, matriz y se comparan los resultados con los obte- 1997)] con una matriz de 160 especies y 360 nidos bajo PI. 19.
Load more

Recommended publications
  • The Skull of the Upper Cretaceous Snake Dinilysia Patagonica Smith-Woodward, 1901, and Its Phylogenetic Position Revisited
    Zoological Journal of the Linnean Society, 2012, 164, 194–238. With 24 figures The skull of the Upper Cretaceous snake Dinilysia patagonica Smith-Woodward, 1901, and its phylogenetic position revisited HUSSAM ZAHER1* and CARLOS AGUSTÍN SCANFERLA2 1Museu de Zoologia da Universidade de São Paulo, Avenida Nazaré 481, Ipiranga, 04263-000, São Paulo, SP, Brasil 2Laboratorio de Anatomía Comparada y Evolución de los Vertebrados. Museo Argentino de Ciencias Naturales ‘Bernardino Rivadavia’, Av. Angel Gallardo 470 (1405), Buenos Aires, Argentina Received 23 April 2010; revised 5 April 2011; accepted for publication 18 April 2011 The cranial anatomy of Dinilysia patagonica, a terrestrial snake from the Upper Cretaceous of Argentina, is redescribed and illustrated, based on high-resolution X-ray computed tomography and better preparations made on previously known specimens, including the holotype. Previously unreported characters reinforce the intriguing mosaic nature of the skull of Dinilysia, with a suite of plesiomorphic and apomorphic characters with respect to extant snakes. Newly recognized plesiomorphies are the absence of the medial vertical flange of the nasal, lateral position of the prefrontal, lizard-like contact between vomer and palatine, floor of the recessus scalae tympani formed by the basioccipital, posterolateral corners of the basisphenoid strongly ventrolaterally projected, and absence of a medial parietal pillar separating the telencephalon and mesencephalon, amongst others. We also reinterpreted the structures forming the otic region of Dinilysia, confirming the presence of a crista circumfenes- tralis, which represents an important derived ophidian synapomorphy. Both plesiomorphic and apomorphic traits of Dinilysia are treated in detail and illustrated accordingly. Results of a phylogenetic analysis support a basal position of Dinilysia, as the sister-taxon to all extant snakes.
    [Show full text]
  • Calabaria and the Phytogeny of Erycine Snakes
    <nological Journal of the Linnean Socieb (1993), 107: 293-351. With 19 figures Calabaria and the phylogeny of erycine snakes ARNOLD G. KLUGE Museum of <oolog~ and Department of Biology, University of Michigan, Ann Arbor, Mr 48109 U.S.A. Receiued October 1991, revised manuscript accepted Mar I992 Two major subgroups of erycine snakes, designated Charina and Eyx, are delimited with a cladistic analysis of 75 morphological characters. The hypotheses of species relationships within the two clades are (reinhardtii (bottae, triuirgata) ) and (colubrinus, conicus, elegans, jayakari, muellen’, somalicus (miliaris (tataricus (iaculus, johnii)))),respectively. This pattern of grouping obtains without assuming multistate character additivity. At least 16 synapomorphies indicate that reinhardtii is an erycine and that it is the sister lineage of the (bottae, friuirgata) cladr. Calabaria and Lichanura are synonymized with Charina for reasons of taxonomic efficiency, and to emphasize the New-Old World geographic distribution of the three species in that assemblage. Further resolution of E’yx species relationships is required before Congylophis (type species conicus) can be recognized. ADDITIONAL KEY WORDS:--Biogeography - Cladistics - erycines - fossils - taxonomy CONI‘EN’I’S Introduction ................... 293 Erycine terminal taxa and nomenclature ............ 296 Fossils .................... 301 Methods and materials ................ 302 Eryrine phylogeny ................. 306 Character descriptions ............... 306 Other variation ................
    [Show full text]
  • Hábitos De Vida De La Serpiente Cretácica Dinilysia Patagonicawoodward
    AMEGHINIANA (Rev. Asoc. Paleontol. Argent.) - 40 (3): 407-414. Buenos Aires, 30-09-2003 ISSN0002-7014 Hábitos de vida de la serpiente cretácica Dinilysia patagonicaWoodward Adriana M. ALBINO1y Michael W. CALDWELL2 Abstract.LIFEHABITOFTHECRETACEOUSSNAKEDINILYSIAPATAGONICAWOODWARD. Palaeoecological recon- structions of the Patagonian Cretaceous snake Dinilysia patagonicaare discussed in relation to hypothe- sized life modes for an “ancestral snake”, and in relation to the ecotypes of basal snakes. A comparison of orbit orientation (e.g., dorsally exposed eyes) and aspects of postcranial osteology in diverse ecological types of snakes does not clearly resolve life modes and habits. Dinilysiais interpreted here as a partially terrestrial snake whose morphology may have been adaptable to semi-aquatic (seasonal lagoons and streams) or semi-fossorial habits (dune fields and interdune basin deposits). Partially terrestrial snakes with large bodies that may have fed on small to medium-sized prey items would have appeared earlier in snake phylogeny than has been previously supposed. Resumen.Se discuten las reconstrucciones paleoecológicas de la serpiente del Cretácico de Patagonia Dinilysia patagonicaen relación a modos de vida hipotéticos para una “serpiente ancestral” y a los ecotipos de las serpientes basales. La comparación de la orientación de la órbita (e.g.ojos expuestos dorsalmente) y aspectos de la osteología postcraneana en diversos tipos ecológicos de serpientes no permiten inferir claramente los modos de vida y hábitos. En este trabajo se interpreta que Dinilysiahabría sido una ser- piente parcialmente terrestre cuya morfología pudo haber sido adaptativa para hábitos semi-acuáticos (la- gos y ríos estacionales) o semi-fosoriales (dunas e interdunas). Serpientes de grandes dimensiones y par- cialmente terrestres que podrían haber estado capacitadas para predar sobre presas de pequeño a media- no tamaño habrían aparecido en la filogenia del grupo con anterioridad a lo supuesto.
    [Show full text]
  • Introduction and Bibliography
    Downloaded from http://sp.lyellcollection.org/ by guest on October 3, 2021 Introduction and bibliography MIKE SMITH*, ZERINA JOHANSON, PAUL M. BARRETT & M. RICHTER Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK *Corresponding author (e-mail: [email protected]) Arthur Smith Woodward (1864–1944) was ac- Wegener was proposing his theory of continental knowledged as the world’s foremost authority on drift. It would be almost half a century before fossil fishes during his lifetime and made impor- his theory gained widespread acceptance. Hallam tant contributions to the entire field of vertebrate (1983, p. 135) wrote in Great Geological Contro- palaeontology. He was a dedicated public servant, versies that ‘The American palaeontologist G. G. spending his whole career at the British Museum Simpson noted in 1943 the near unanimity of (Natural History) (now the Natural History Museum, palaeontologists against Wegener’s ideas’. Smith NHM) in London. He served on the council and as Woodward certainly fell into this camp but was president of many of the important scientific socie- more inclined to note that no certainty could yet be ties and was elected a Fellow of the Royal Society attached to the palaeontological evidence (Wood- in 1901. He was knighted on retirement from the ward 1935). Scientific theories that we accept today Museum in 1924. were still controversial and intensely debated while Smith Woodward was born on 23 May 1864 in Smith Woodward was alive. Macclesfield, an industrial town in the north Mid- A book that celebrates the life and scientific lands of England.
    [Show full text]
  • New Record of Snakes from the Cretaceous of Patagonia (Argentina)
    New record of snakes from the Cretaceous of Patagonia (Argentina) Adriana María ALBINO CONICET, Departamento de Biología, Universidad Nacional de Mar del Plata, Funes 3250, 7600 Mar del Plata (Argentina) [email protected] Albino A. M. 2000. — New record of snakes from the Cretaceous of Patagonia (Argentina). Geodiversitas 22 (2) : 247-253. KEY WORDS Cretaceous, Serpentes, ABSTRACT Madtsoiidae, New remains of snakes from the Late Cretaceous (La Colonia Formation; ?Boidae, Campanian-Maastrichtian) of Argentina increase the record of the earliest incertae sedis, Patagonia, Patagonian snakes. They include the southernmost record of the madtsoiid paleobiogeography. snake Alamitophis, another probable madtsoiid, perhaps a boid, and a snake incertae sedis. MOTS CLÉS RÉSUMÉ Crétacé, serpents, De nouveaux restes de serpents du Crétacé supérieur de Patagonie (Argentine). Madtsoiidae, De nouveaux restes de serpents du Crétacé supérieur (Formation La Colonia ; ?Boidae, Campanien-Maastrichtien) d’Argentine sont décrits. Ils comprennent le incertae sedis, Patagonie, représentant le plus austral du madtsoiidé Alamitophis, un autre probable paléobiogéographie. madtsoiidé, peut-être un Boidae et un serpent incertae sedis. GEODIVERSITAS • 2000 • 22 (2) © Publications Scientifiques du Muséum national d’Histoire naturelle, Paris. www.mnhn.fr/publication/ 247 Albino A. M. 70° 65° 35° s pa ire La Pam s A s o n e u B Neuquen 4 Río Negro CHILE 3 40° 2 1 Chubut 45° N 45° 0 200 km 75 70° 65° 60° FIG. 1. — Localities. 1, eastern slopes between El Buitre Chico and El Buitre hills, La Colonia area, “Comarca Norpatagónica”. Second facies association of the La Colonia Formation (Campanian-Maastrichtian age); 2, Cerro Cuadrado, Arroyo Verde, middle section of the Los Alamitos Formation (Campanian age, Bonaparte 1996); 3-4, other Late Cretaceous Patagonian localities bearing remains of Alamitophis argentinus; 3, El Palomar; 4, Bajo Trapalcó.
    [Show full text]
  • Chubut Province, Argentina)
    AMEGHINIANA - 2012 - Tomo 49 (2): 230 – 235 ISSN 0002-7014 FIRST SNAKE RECORD FROM THE SARMIENTO FORMATION AT LA GRAN HONDONADA (CHUBUT PROVINCE, ARGENTINA) ADRIANA M. ALBINO Departamento de Biología, Universidad Nacional de Mar del Plata, Funes 3250, B7602AYJ Mar del Plata, Argentina Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). [email protected] Abstract. The described indeterminate boid snake was collected in rocks belonging to the Sarmiento Formation and exposed at La Gran Hondonada (Chubut Province, Argentina). This is the first snake record for the mid–late Eocene Mustersan South American land-mammal age. The specimen proves that medium- to large-sized boids inhabited the Patagonian region during most of the Palaeogene, suggesting climatic conditions warmer than those established at the beginning of the Neogene. Key words. Boidae. Eocene. Palaeogene. South America. Argentina. Resumen. PRIMER REGISTRO DE SERPIENTES EN LA FORMACION SARMIENTO, GRAN HONDONADA (PROVINCIA DE CHUBUT, ARGENTINA). El boideo indeterminado descripto en este trabajo fue hallado en sedimentitas de la Formación Sarmiento aflorantes en la localidad La Gran Hondonada (Provincia del Chubut, Argentina). Éste es el primer registro de serpientes para la Edad mamífero Mustersense (Eoceno medio–tardío). El espécimen evidencia que boideos de mediano a gran tamaño habitaron en la región pat- agónica durante la mayor parte del Paleógeno, sugiriendo condiciones climáticas más cálidas que aquellas desarrolladas a partir del Neógeno. Palabras clave. Boidae. Eoceno. Paleógeno. América del Sur. Argentina. Snakes are known to have lived in South America since the MATERIALS AND METHODS Late Cretaceous, showing a relatively high diversity that Most morphological studies (Underwood, 1976; Un- became higher still during the Cenozoic (Albino, 1996a, derwood and Stimson, 1990; Kluge, 1991, 1993a,b) led to 2007).
    [Show full text]
  • Cretaceous of Patagonia, Argentina)
    First natural endocranial cast of a fossil snake (Cretaceous of Patagonia, Argentina) Laura N. Triviño1, Adriana M. Albino2, María T. Dozo3 and Jorge D. Williams1 1CONICET, Sección Herpetología, Museo de La Plata, Universidad Nacional de La Plata, Paseo del Bosque s/n, B1900FWA La Plata, Argentina. 2CONICET, Departamento de Biología, Universidad Nacional de Mar del Plata, Funes 3250, B7602AYJ Mar del Plata, Argentina. 3 CONICET, Centro Nacional Patagónico, Instituto Patagónico de Geología y Paleontología, Boulevard Brown 2915, U9120ACD Puerto Madryn, Argentina. Short title: First endocranial cast of fossil snake. Corresponding autor: Laura N. Triviño, [email protected]. CONICET. Sección Herpetología, Museo de La Plata, Universidad Nacional de La Plata, Paseo del Bosque s/n, B1900FWA, La Plata, Argentina This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record. Please cite this article as an ‘Accepted Article’, doi: 10.1002/ar.23686 This article is protected by copyright. All rights reserved. The Anatomical Record Page 2 of 38 ABSTRACT In this study, we describe a natural endocranial cast included in a partially preserved medium-sized skull of the Upper Cretaceous South American snake Dinilysia patagonica. The endocast is composed of sedimentary filling of the cranial cavity in which the posterior brain, the vessels, the cranial nerves, and the inner ear surrounded by delicate semicircular canals, are represented. It is simple in form, with little differentiation between the three main areas (Forebrain, Midbrain and Hindbrain), and without flexures.
    [Show full text]
  • Fossil Calibration Dates for Molecular Phylogenetic Analysis of Snakes 1: Serpentes, Alethinophidia, Boidae, Pythonidae
    Palaeontologia Electronica palaeo-electronica.org Fossil calibration dates for molecular phylogenetic analysis of snakes 1: Serpentes, Alethinophidia, Boidae, Pythonidae Jason J. Head ABSTRACT Snakes possess a dense fossil record through the Late Cretaceous and Cenozoic and are an important clade for studies of molecular phylogenetics. The use of the snake fossil record has historically been a limited and inaccurate source of temporal data in molecular studies due to taxonomic and phylogenetic ambiguities. Here I pro- vide 10 fossil calibration dates for phylogenetic analysis of higher-order interrelation- ships of snakes. Calibration points include apomorphy-based systematic justifications and precise dates for hard minimum divergence timings. Calibrated nodes are for the snake total clade, Alethinophidia, and boid and pythonid taxa. Hard minimum diver- gence timings range from earliest late Cretaceous to middle Miocene. These dates provide precise minima for constraining the early evolutionary history of Serpentes. Comparisons of phylogenetically justified calibrations with published studies that employed form-taxon assignments suggests greatly younger divergences for justified nodes and indicates that deep-time divergence estimates that have been correlated with tectonic histories may be considerably too old and reliant on presumptions of Early Cretaceous Gondwanan vicariance as a mechanism of speciation. Jason J. Head. Department of Earth and Atmospheric Sciences and Nebraska State Museum of Natural History University of Nebraska-Lincoln,
    [Show full text]
  • Nuevo Registro Del Género Dinilysia (Squamata, Serpentes) Para La Formación Anacleto (Campaniano Inferior–Medio), Rincón De Los Sauces, Neuquén, Argentina
    AMEGHINIANA - 2012 - Tomo 49 (1): 132 – 136 ISSN 0002-7014 NOTA PALEONTOLÓGICA NUEVO REGISTRO DEL GÉNERO DINILYSIA (SQUAMATA, SERPENTES) PARA LA FORMACIÓN ANACLETO (CAMPANIANO INFERIOR–MEDIO), RINCÓN DE LOS SAUCES, NEUQUÉN, ARGENTINA LEONARDO SEBASTIÁN FILIPPI1 y ALBERTO CARLOS GARRIDO2 1Museo “Carmen Funes”, Av. Córdoba 55, Q8318EBA Plaza Huincul, Neuquén, Argentina. [email protected] 2Museo Provincial de Ciencias Naturales “Prof. Dr. Juan Olsacher”, Dirección Provincial de Minería, Etcheluz y Ejército Argentino, Q8340AUD Zapala, Neuquén, Argentina. [email protected] Palabras clave. Serpiente fósil. Dinilysia. Cretácico. Formación Anacleto. Cuenca Neuquina. Key words: Fossil snake. Dinilysia. Cretaceous. Anacleto Formation. Neuquen Basin. Durante años la serpiente Dinilysia patagonica Smith-Wo- 1989; Bonaparte, 1991; Caldwell y Albino, 2001, Albino, odward, 1901, se ha conocido por materiales provenientes de 2002, 2007; Caldwell y Calvo, 2008), considerada de edad varias localidades fosilíferas de Neuquén y Río Negro: Ciu- santoniana. Sin embargo, hallazgos más recientes en Aguada dad de Neuquén, Paso Córdoba y Barreales Norte (Fig.1), Toledo y Cinco Saltos (Fig. 1), la reconocen en niveles de correspondientes a niveles de sedimentitas asignadas a la la Formación Anacleto (Albino, 2007; Scanferla y Canale, Formación Bajo de la Carpa (Smith-Woodward, 1901; Estes 2007), extendiéndose por lo tanto su biocrón hasta el Cam- et al., 1970; Frazetta, 1970; Hecht, 1982; Rage y Albino, paniano. Figura 1. Mapa de ubicación de las localidades donde se han registrado restos de Dinilysia/ Location map showing localities where remains of Dinilysia were recorded. 1. Ciudad de Neuquén, 2. Paso Córdoba, 3. Barreales Norte, 4. Cinco Saltos, 5. Aguada Toledo, 6. Puesto La Rinconada (Yacimiento Medanito), Rincón de los Sauces.
    [Show full text]
  • The Morphology of the Inner Ear of Squamate Reptiles and Its Bearing on the Origin of Snakes
    Downloaded from http://rsos.royalsocietypublishing.org/ on August 24, 2017 The morphology of the inner ear of squamate rsos.royalsocietypublishing.org reptiles and its bearing on Research the origin of snakes Cite this article: Palci A, Hutchinson MN, Alessandro Palci1,2, Mark N. Hutchinson1,2,3, Michael Caldwell MW, Lee MSY. 2017 The morphology 4 1,2 of the inner ear of squamate reptiles and its W. Caldwell and Michael S. Y. Lee bearing on the origin of snakes. R. Soc. open 1South Australian Museum, Adelaide, South Australia, Australia sci. 4: 170685. 2College of Science and Engineering, Flinders University, Adelaide, http://dx.doi.org/10.1098/rsos.170685 South Australia, Australia 3School of Biological Sciences, University of Adelaide, Adelaide, South Australia, Australia 4Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada Received: 15 June 2017 AP, 0000-0002-9312-0559;MSYL,0000-0002-3905-0887 Accepted: 21 July 2017 The inner ear morphology of 80 snake and lizard species, representative of a range of ecologies, is here analysed Subject Category: and compared to that of the fossil stem snake Dinilysia patagonica, using three-dimensional geometric morphometrics. Biology (whole organism) Inner ear morphology is linked to phylogeny (we find here a strong phylogenetic signal in the data that can Subject Areas: complicate ecological correlations), but also correlated with ecology/evolution/palaeontology ecology, with Dinilysia resembling certain semi-fossorial forms (Xenopeltis and Cylindrophis), consistent with previous reports. Keywords: We here also find striking resemblances between Dinilysia ecology, evolution, labyrinth, geometric and some semi-aquatic snakes, such as Myron (Caenophidia, morphometrics, principal components Homalopsidae).
    [Show full text]
  • Downloaded from the NBCI Genbank Database Emerging from Hibernation in Order to Bask, Mate, and (See Additional File 9)
    Hsiang et al. BMC Evolutionary Biology (2015) 15:87 DOI 10.1186/s12862-015-0358-5 RESEARCH ARTICLE Open Access The origin of snakes: revealing the ecology, behavior, and evolutionary history of early snakes using genomics, phenomics, and the fossil record Allison Y Hsiang1*, Daniel J Field1,2, Timothy H Webster3, Adam DB Behlke1, Matthew B Davis1, Rachel A Racicot1 and Jacques A Gauthier1,4 Abstract Background: The highly derived morphology and astounding diversity of snakes has long inspired debate regarding the ecological and evolutionary origin of both the snake total-group (Pan-Serpentes) and crown snakes (Serpentes). Although speculation abounds on the ecology, behavior, and provenance of the earliest snakes, a rigorous, clade-wide analysis of snake origins has yet to be attempted, in part due to a dearth of adequate paleontological data on early stem snakes. Here, we present the first comprehensive analytical reconstruction of the ancestor of crown snakes and the ancestor of the snake total-group, as inferred using multiple methods of ancestral state reconstruction. We use a combined-data approach that includes new information from the fossil record on extinct crown snakes, new data on the anatomy of the stem snakes Najash rionegrina, Dinilysia patagonica,andConiophis precedens, and a deeper understanding of the distribution of phenotypic apomorphies among the major clades of fossil and Recent snakes. Additionally, we infer time-calibrated phylogenies using both new ‘tip-dating’ and traditional node-based approaches, providing new insights on temporal patterns in the early evolutionary history of snakes. Results: Comprehensive ancestral state reconstructions reveal that both the ancestor of crown snakes and the ancestor of total-group snakes were nocturnal, widely foraging, non-constricting stealth hunters.
    [Show full text]
  • Synchrotron Imaging of Dentition Provides
    Synchrotron imaging of dentition provides insights into the biology of Hesperornis and Ichthyornis, the “last” toothed birds Maitena Dumont, Paul Tafforeau, Thomas Bertin, Bhart-Anjan Bhullar, Daniel Field, Anne Schulp, Brandon Strilisky, Beatrice Thivichon-Prince, Laurent Viriot, Antoine Louchart To cite this version: Maitena Dumont, Paul Tafforeau, Thomas Bertin, Bhart-Anjan Bhullar, Daniel Field, et al.. Syn- chrotron imaging of dentition provides insights into the biology of Hesperornis and Ichthyornis, the “last” toothed birds. BMC Evolutionary Biology, BioMed Central, 2016, 16, pp.178. 10.1186/s12862- 016-0753-6. hal-02909862 HAL Id: hal-02909862 https://hal.archives-ouvertes.fr/hal-02909862 Submitted on 3 May 2021 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution| 4.0 International License Dumont et al. BMC Evolutionary Biology (2016) 16:178 DOI 10.1186/s12862-016-0753-6 RESEARCH ARTICLE Open Access Synchrotron imaging of dentition provides insights into the biology of Hesperornis and Ichthyornis, the “last” toothed birds Maïtena Dumont1,2, Paul Tafforeau3, Thomas Bertin1, Bhart-Anjan Bhullar4, Daniel Field4, Anne Schulp5,6, Brandon Strilisky7, Béatrice Thivichon-Prince1, Laurent Viriot1 and Antoine Louchart1,8* Abstract Background: The dentitions of extinct organisms can provide pivotal information regarding their phylogenetic position, as well as paleobiology, diet, development, and growth.
    [Show full text]