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Following the latest government announcement concerning the current Covid-19 pandemic the Society headquarters at Mansion House has now closed.

Where possible emails will be monitored, any urgent enquiries should be forwarded to info@royensoc.co.uk

Membership applications will be put on hold until further notice.

Our "identify that insect" service will continue, but our Director of Science cannot accept any physical samples to inspect during this time. identifythatinsect@royensoc.co.uk

Our Librarian will not have access to our collections from home, but will be happy to try and locate references available to download from the internet. val@royensoc.co.uk

All events and meetings have been cancelled until further notice https://www.royensoc.co.uk/events

We hope that everyone stays well and we hope that normal business can resume soon for everyone, thank you for your understanding during this difficult time that the world finds itself in.

Kirsty Whiteford - Registrar

Apterygota

The Apterygota, which formerly included the other primitively wingless insects currently placed in the class Entognatha, are now restricted to the two orders Archaeognatha and Zygentoma, which in turn were formerly united as the Thysanura. Despite the superficial similarity of the two groups, it is now clear that they are not closely related, mainly because of fundamental differences in the mouthparts. The Archaeognathous mandibles are monocondylic, having a single articulating point with the head so that the mandible can rotate; Zygentomous mandibles are dicondylic, with two articulating points that restrict the motion to a single plane yet enable the development of a much stronger biting action; this is the type found in all the higher insects, and the Zygentoma may well be the sister group of the Pterygota, or winged insects.  Clearly the ‘Apterygota’ is not a monophyletic group and is simply retained for convenience in grouping these two orders that superficially resemble each other and have similar life histories.

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