Post details: Evidences of stasis preserved in Dominican Amber

11/22/06

Permalinkby 10:33:15 am, Categories: Literature - Articles, 188 words   English (UK)

Evidences of stasis preserved in Dominican Amber

Non-biting midges reveal not only insects that are similar to those today, but also ecosystem stability in the Caribbean from the Miocene until today. These new results are part of a less-appreciated characteristic of the fossil record: that stasis is widespread and deserves a much higher profile in our scientific thinking.

Chironomidae (Diptera) in Dominican amber as indicators for ecosystem stability in the Caribbean
Martin Grund
Palaeogeography, Palaeoclimatology, Palaeoecology, 241(3-4), 14 November 2006, 410-416.

Abstract: A first overview on fossil chironomids in Dominican amber is given. This fossil assemblage seems to represent an insular fauna, very similar to its living relatives. Stenochironomus sp. and especially the true xylophagous, neotropical/southern North American Xestochironomus spp. prove the persistence of submerged dead wood in nutrient poor mountain streams in the Greater Antilles from the Miocene until today. Their abundance indicates that the special ecological conditions in extant Caribbean tropical mountain streams already ruled the ancient ecosystem. The results arising from the fossils of these freshwater organisms do not coincide with the faunal changes shown by other groups of insects. General systematic descriptions of new fossil representatives of Xestochironomus and Stenochironomus are given.

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