Post details: More stasis in amber: the Compsocidae

11/20/07

Permalinkby 08:37:40 am, Categories: Literature - Articles, 194 words   English (UK)

More stasis in amber: the Compsocidae

An insect in Burmese amber, found within Cretaceous strata, has a "body structure and wing venation nearly identical to those of the recent Compsocidae". There are only two extant species, and both of these live in Central America. The authors say: "The small family Compsocidae has been unknown in the fossil record hitherto" and "the discovery of this group in the Late Albian Burmese amber is of great interest for its age and biogeography."
Findings like this serve to remind us that stasis is a distinctive feature of the fossil record and we have to do justice to this in our thinking about origins.
For earlier comments along these lines, go here and here and here.

The first fossil Compsocidae from Cretaceous Burmese amber (Insecta, Psocoptera, Troctomorpha)
A. Nel and A. Waller
Cretaceous Research, Volume 28, Issue 6, December 2007, Pages 1039-1041

Abstract: The first fossil record of the Compsocidae, Burmacompsocus perreaui gen. et sp. nov., is described from Late Albian Burmese amber. Its strong similarity to the two extant compsocid genera suggests a remarkable morphological stability within this group of 100 Ma. This family, now known only in Central America, was certainly more widespread in the past.

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