Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Permian Gondwana-Boreal antitropicality with special reference to brachiopod faunas
Autore:
Shi, GR; Grunt, TA;
Indirizzi:
Deakin Univ, Sch Ecol & Environm, Clayton, Vic 3168, Australia Deakin Univ Clayton Vic Australia 3168 ronm, Clayton, Vic 3168, Australia Russian Acad Sci, Inst Paleontol, Moscow 117647, Russia Russian Acad Sci Moscow Russia 117647 t Paleontol, Moscow 117647, Russia
Titolo Testata:
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
fascicolo: 3-4, volume: 155, anno: 2000,
pagine: 239 - 263
SICI:
0031-0182(20000115)155:3-4<239:PGAWSR>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIOGEOGRAPHY; EVOLUTION; PACIFIC; OCEAN; INTERCHANGE; MOLLUSKS; NORTHERN; ATLANTIC; FACIES; BIOTAS;
Keywords:
Permian; antitropical distribution; palaeobiogeography; Brachiopoda;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
124
Recensione:
Indirizzi per estratti:
Indirizzo: Shi, GR Deakin Univ, Sch Ecol & Environm, Rusden Campus,662 Blackburn Rd, Clayton,Vic 3168, Australia Deakin Univ Rusden Campus,662 Blackburn Rd Clayton Vic Australia 3168
Citazione:
G.R. Shi e T.A. Grunt, "Permian Gondwana-Boreal antitropicality with special reference to brachiopod faunas", PALAEOGEO P, 155(3-4), 2000, pp. 239-263

Abstract

In a reconstructed global Permian marine biogeographic framework, antitropicality is defined as a biogeographic phenomenon whereby a taxon occurs only in the Boreal and Gondwanan Realms and is lacking completely (or nearly so) in the intervening Palaeoequatorial Realm. We recognise three types of antitropical distributions: bipolar (high-latitude, generally >50 degrees latitude in each hemisphere), bitemperate (approximately between 30 degrees and 50 degrees latitudes in each hemisphere) and a combination of both. Evidence of Permian antitropicality has been reported from almost all major marine invertebrate groups, both pelagic or benthic forms, and is best known at the generic level although an increasing number of antitropical species have also been recognised. Antitropicality appears to have occurred throughout most of the Permian, but its strength varied from stage to stage, judging by the number of brachiopod genera shared between the two hemispheres. The phenomenon manifests itself most strongly from the Sakmarian to the Kazanian (?Wordian), suggesting a prolonged interval of enhanced biotic interchanges between the Gondwanan and Boreal Realms. Possible migration pathways and mechanisms are reviewed and discussed. Among a number of existing scenarios invoked to explain the origin of both modern and geological antitropicality, we here present data particularly supporting (1) a south-to-north 'stepping-stone' migratory mechanism via island terranes scattered in the eastern Palaeotethys, (2) a vicariance model exemplified by the spatio-temporaldistribution of Tomiopsis, and (3) a shelf, north-to-south migration alongthe western coast of the Palaeotethys, as suggested by Sowerbina. In addition, we also consider dispersal along the western coast of Pangea, facilitated at times by upwelling systems, as an additional migration pathway for intercontinental biotic exchanges during the Permian, although corroboratingdata are required at present. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 18:05:04