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Text 1
The land that became Grande Terre island split from remnants of the former supercontinent Gondwana approximately 80 million years ago, carrying Gondwanan biota with it, and experienced periodic submersion until 37 million years ago. Some researchers posit that the island's current biota includes members of Gondwanan clades (i.e., clades predating the split) that persisted by seeking temporary refuge on nearby islands during submergence events.
Text 2
In a recent study, Prashant Sharma and Gonzalo Giribet found that the crown age -the age of the most recent common ancestor of all species in the clade (i.e., the clade's founder)-is 48.9 million years for Grande Terre's clade of harvest spiders. Most of the island's extant biota belong to clades with younger crown ages, however: Jérôme Murienne et al. found that the crown age of Grande Terre's clade of cockroaches is 2.7 million years, for example.
The land that became Grande Terre island split from remnants of the former supercontinent Gondwana approximately 80 million years ago, carrying Gondwanan biota with it, and experienced periodic submersion until 37 million years ago. Some researchers posit that the island's current biota includes members of Gondwanan clades (i.e., clades predating the split) that persisted by seeking temporary refuge on nearby islands during submergence events.
Text 2
In a recent study, Prashant Sharma and Gonzalo Giribet found that the crown age -the age of the most recent common ancestor of all species in the clade (i.e., the clade's founder)-is 48.9 million years for Grande Terre's clade of harvest spiders. Most of the island's extant biota belong to clades with younger crown ages, however: Jérôme Murienne et al. found that the crown age of Grande Terre's clade of cockroaches is 2.7 million years, for example.