Get access
Advertisement

A new family of astigmatid mites from the lies Crozet, sub-Antarctica; introducing a new concept relating to ontogenetic development of idiosomal setae

Authors


Abstract

Glycacarus combinatusgen. and sp. nov. was collected from the nest of the White chinned petrel (Procellaria aequinoctialis) on Possession Island Sub-Antarctica. It can be distinguished from all other members of the Astigmata by the M-shaped prodorsal shield and by the fact that it is made up of a complete mixture of the morphological characters which separate the Glycyphagidae from the Acaridae. In order to maintain the present familial structure within the free-living Astigmata a new family Glycacaridae is proposed. It is suggested that these three families arose from three evolutionary lines which separated from a common ancestor possibly during the Cretaceous period. Ontogenetic development of the body setae is described and a new interpretation of setal homologies relative to different life-cycle stages is discussed, together with a revised nomenclatural system for the idiosomal seta.

Get access to the full text of this article

Ancillary