46 research outputs found
Memory Limitations and Structural Forgetting: The Perception of Complex Ungrammatical Sentences as Grammatical
Full text linkChanges to the Fossil Record of Insects through Fifteen Years of Discovery
Get PDFThe first and last occurrences of hexapod families in the fossil record are compiled from publications up to end-2009. The major features of these data are compared with those of previous datasets (1993 and 1994). About a third of families (>400) are new to the fossil record since 1994, over half of the earlier, existing families have experienced changes in their known stratigraphic range and only about ten percent have unchanged ranges. Despite these significant additions to knowledge, the broad pattern of described richness through time remains similar, with described richness increasing steadily through geological history and a shift in dominant taxa, from Palaeoptera and Polyneoptera to Paraneoptera and Holometabola, after the Palaeozoic. However, after detrending, described richness is not well correlated with the earlier datasets, indicating significant changes in shorter-term patterns. There is reduced Palaeozoic richness, peaking at a different time, and a less pronounced Permian decline. A pronounced Triassic peak and decline is shown, and the plateau from the mid Early Cretaceous to the end of the period remains, albeit at substantially higher richness compared to earlier datasets. Origination and extinction rates are broadly similar to before, with a broad decline in both through time but episodic peaks, including end-Permian turnover. Origination more consistently exceeds extinction compared to previous datasets and exceptions are mainly in the Palaeozoic. These changes suggest that some inferences about causal mechanisms in insect macroevolution are likely to differ as well
XXII.—New British insects indicated in Mr. Curtis\u27s guide
No full textVolume: 2Start Page: 183End Page: 19
Descriptions of insects figured, and references to plates illustrating the notes on Kerry insects
No full textVolume: 2Start Page: 59End Page: 6
Descriptions of new British insects, indicated in Mr. Curtis\u27s guide
No full textVolume: 2Start Page: 112End Page: 12
An epitome of the British genera, in the Order Thysanoptera, with indications of a few of the species
No full textVolume: 3Start Page: 439End Page: 45
Art XXI. Essay on the classification of parasitic Hymenoptera, etc
No full textVolume: 2Start Page: 225End Page: 25
