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Registros recuperados: 7
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Disjoint geographical distribution of intertidal and nearshore benthic invertebrates in the Southern Hemisphere RChHN
CASTILLA,JUAN C; GUIÑEZ,RICARDO.
Biogeographical explanations for the extant and paleo disjoint geographical distribution in the southern hemisphere of five species of nearshore marine benthic invertebrates: Gaimardia trapesina, Ostrea chilensis, Pyura stolonifera taxonomic complex, Aulacomya ater and Concholepas concholepas, showing distinctive reproductive strategies and early life history characteristics are reviewed and analyzed. Through the use of published and new information we contrasted the following hypotheses: a) vicariance-historical process, b) epiplanktonic larval dispersal, c) juvenile/adult dispersal through rafting and d) planned or accidental anthropogenic dispersal mechanisms. The juvenile/adult transoceanic dispersal hypothesis by rafting was the only one impossible to...
Tipo: Journal article Palavras-chave: Paleobiogeography; Vicariance; Larval dispersal; Rafting; Anthropogenic dispersal; Bivalves; Gastropods; Tunicates; Invertebrates; Nearshore; Southern hemisphere.
Ano: 2000 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000400004
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Fossil Chondrichthyans from the Upper Pliocene Horcón Formation, Valparaíso Region, central Chile RChHN
CARRILLO-BRICEÑO,JORGE D; GONZÁLEZ-BARBA,GERARDO; LANDAETA,MAURICIO F; NIELSEN,SVEN N.
Twelve taxa of chondrichthyan fossils from strata assigned to the Upper Pliocene of the Horcón Formation, Valparaiso region, central Chile, are described and prior records paleobiogeography and paleoenvironmental implications are discussed. The fauna includes Callorhinchus sp., Heterodontus sp., Carcharodon carcharias, Isurus oxyrinchus, Galeorhinus galeus, Carcharhinus brachyurus, Hexanchus griseus, Squatina sp., Pristiophorus sp., Rajidae, Dasyatidae and Myliobatidae. This is one of the most diverse chondrichthyan associations of the Late Neogene of Chile and the rest of South America.
Tipo: Journal article Palavras-chave: South America; Paleobiogeography; Paleoecology; Neogene; Fossil sharks and rays.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000200008
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Historical biogeography of Western Palaearctic pelobatid and pelodytid frogs: a molecular phylogenetic perspective Naturalis
Veith, M.; Fromhage, L.; Kosuch, J.; Vences, M..
Spadefoot toads (Pelobates) and Parsley frogs (Pelodytes) are an enigmatic group of Western Palaearctic anurans. In the genus Pelobates, a fossorial lifestyle has enforced a conserved bauplan that masks their intraspecific evolutionary history. We used partial sequences of the mitochondrial 16S and 12S rRNA genes to infer a paleobiogeographic scenario of speciation events in these two anuran genera. Based on two alternative, mutually exclusive calibrations of the Iberian-African split within Pelobates (Pb. cultripes and Pb. varaldii), the disjunction of the Betic Cordillera ca. 14-16 million years ago (mya), and the end of the Messinian Salinity crisis 5.33 mya, we inferred alternative scenarios for species evolution within both genera applying...
Tipo: Article / Letter to the editor Palavras-chave: Phylogeny; Paleobiogeography; Speciation; Regression-based molecular clock; Bayesian molecular dating; Messinian salinity crisis; 16S; 12S; 42.82.
Ano: 2006 URL: http://www.repository.naturalis.nl/record/214531
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Isopodes aselloïdes stygobies d’Espagne, IV – Stenasellidae: taxonomie, histoire évolutive et biogéographie Naturalis
Magniez, Guy.
The entire family Stenasellidae Dudich, 1924 is composed of ancient stygobitic strains sharing a thalassoid and thermophilic origin. Its presence in Europe is dependent on two factors, the permanent existence of emerged continental shields during long geological periods (at least Tertiary + Quaternary), and its conservation in favourable areas during the different glacial crises. The iberian peninsula seems to have been the most suitable european region for the survival of this stygofauna. Some 119 samples from 116 different localities -scattered over 19 Spanish provinces- have been studied. All aquitanian and iberian stenasellids belong to the traditional genus Stenasellus Dollfus, 1897. We must notice that the stenasellids seem to be absent in the betic...
Tipo: Article / Letter to the editor Palavras-chave: Active expansion; Alluvial channels; Ancient and quaternary settlements; Douro; Ebro; Guadalquivir and Garonne Rivers; Paleobiogeography; Spanish groundwaters; Superspecies; Stenasellus virei; Thalassoid stygobites.
Ano: 1999 URL: http://www.repository.naturalis.nl/record/505100
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Paleobiogeography and taxonomy of the genus Concholepas (Lamarck, 1801): a review and new evidences RChHN
CÁRDENAS,LEYLA; VIARD,FRÉDÉRIQUE; CASTILLA,JUAN CARLOS.
The muricid gastropod Concholepas concholepas, known in Chile as 'loco', is an important component of intertidal and shallow subtidal communities, and is one of the main invertebrates targeted by small-scale fishers (divers) in Chile. Because of its ecological importance and economical value, numerous studies have been conducted to describe its life history, ecology and to understand population dynamics, fishery and management. However, little effort has been done to address the causal factor (s) behind its current geographic distribution and moreover little is known about the past distribution of the different species in the genus. In this paper, first we review the paleobiogeography, historical relationships, taxonomy and geographical distribution of...
Tipo: Journal article Palavras-chave: Paleobiogeography; Southeastern Pacific coast; Concholepas; Fossil record; Taxonomy; MtDNA variation.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000300010
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Re-evaluation of the Cancridae Latreille, 1802 (Decapoda: Brachyura) including three new genera and three new species Naturalis
Schweitzer, Carrie E.; Feldmann, Rodney M..
New fossils referable to the Cancridae Latreille, 1802 extend the known stratigraphic range of the family into the middle Eocene and the geographic range into South America. Each genus within the family has been reevaluated within the context of the new material. A suite of diagnostic characters for each cancrid genus makes it possible to assign both extant and fossil specimens to genera and the two cancrid subfamilies, the Cancrinae Latreille, 1802, and Lobocarcininae Beurlen, 1930, based solely upon dorsal carapace morphology. Cheliped morphology is useful in assigning genera to the family but is significantly less useful at the subfamily and generic level. Each of the four subgenera sensu Nations (1975), Cancer Linnaeus, 1758, Glebocarcinus Nations,...
Tipo: Article / Letter to the editor Palavras-chave: Decapoda; Brachyura; Cancridae; Tertiary; Paleobiogeography; Tethys.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/534380
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The Dakoticancridae (Decapoda, Brachyura) from the Late Cretaceous of North America and Mexico Naturalis
Bishop, G.A.; Feldmann, R.M.; Vega, F..
The podotrematous crab family Dakoticancridae includes four genera: Dakoticancer Rathbun, Tetracarcinus Weller, Avitelmessus Rathbun, and Seorsus Bishop, all known solely from the Late Cretaceous of North America. Lathelicocarcinus Bishop, originally referred to the family, must be reassigned. Fine details of anatomy, preserved on specimens of D. overanus Rathbun and A. grapsoideus Rathbun, permit description of genital openings and interpretation of functional morphology of appendages. Although one species, D. australis Rathbun, has been found associated with burrow structures, all were probably vagrant epifaunal animals on fine- to medium-grained siliciclastic substrata. Food was probably obtained by generalized low-level predation and scavenging....
Tipo: Article / Letter to the editor Palavras-chave: Dakoticancridae; Brachyura; Paleobiology; Paleobiogeography; Late Cretaceous; North America; Mexico; Taxonomy; Cladistics.
Ano: 1998 URL: http://www.repository.naturalis.nl/record/534324
Registros recuperados: 7
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