Laurasia

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Laur·a·sia

 (lô-rā′zhə)
n.
The supercontinent of the Northern Hemisphere that, according to the theory of plate tectonics, broke up into North America, Greenland, Europe, and Asia except for the Indian subcontinent.

[New Latin Laur(entia), geologic precursor of North America (after the Saint Lawrence River) + (Eur)asia.]

Laurasia

(lɔːˈreɪʃə)
n
(Placename) one of the two ancient supercontinents produced by the first split of the even larger supercontinent Pangaea about 200 million years ago, comprising what are now North America, Greenland, Europe, and Asia (excluding India). See also Gondwanaland, Pangaea
[C20: from New Latin Laur(entia) (referring to the ancient N American landmass, from Laurentian strata of the Canadian Shield) + (Eur)asia]

Laur•a•sia

(lɔˈreɪ ʒə, -ʃə)

n.
a hypothetical landmass in the Northern Hemisphere that separated near the end of the Paleozoic Era to form North America and Eurasia.
[< German (1928), b. Laurentia the forerunner of the North American continent (see Laurentian) and Eurasia]

Laur·a·sia

(lô-rā′zhə)
A supercontinent of the Northern Hemisphere made up of the landmasses that currently correspond to North America, Greenland, Europe, and Asia (except India). According to the theory of plate tectonics, Laurasia formed at the end of the Precambrian Eon and broke up in the middle of the Mesozoic Era. Compare Gondwanaland.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Laurasia - a hypothetical continent that (according to plate tectonic theory) broke up later into North America and Europe and Asia
northern hemisphere - the hemisphere that is to the north of the equator
References in periodicals archive ?
The Pakistan is lucky to have vast spatially and temporally well exposed Geodiverse heritage like Gondwanan, Laurasian and Tethyan blocks.
2002)), at least a Cretaceous, if not Laurasian, origin hypothesis is possible for the Cannabaceae (sensu stricto) (Boutain, 2014; He et al.
Another well-supported monophyletic grouping within the larger mollusk mite branch is one that is formed by African and Laurasian gill mites along with the mantle mites (see node labeled D).
After the fragmentation of supercontinent Pangaea and the subsequent split of the Laurasian and Gondwanan landmasses, certain groups of amphibians were able to "hitch a ride" from one continent to another.
The presence of a scorpion in Gondwana, similar to Laurasian taxa, is consistent with growing evidence for globally comparable terrestrial ecosystems by the end of the Devonian.
2010a) have shown host-switching of some Schistonchus lineages in Australia where there is evidence of long term incursions of apparently Laurasian Ficus lineages and their associated fig wasps and nematodes supporting the possibility of nematode host-switching as fig wasp lineages are moved into new areas.
The oldest fossils are from North America, pointing to a Laurasian center of origin, along with Ceratozamia Brongn.
From a floristic perspective, the Mexican vegetation of temperate and cold regions has been traditionally considered Nearctic (assuming a Laurasian origin), whereas the vegetation of the humid tropics is commonly treated as typically Neotropical (possibly of Gondwanan origin; Doyle & Luckow, 2003; Corlett & Primack, 2006; Fiaschi & Pirani, 2009).
These authors explained the presence of a typically laurasian taxon in Madagascar by two different hypotheses.