Ian R. Walker

First - A few comments concerning my "Taxonomy"

Readers will note that I frequently refer to "groups" or "types", often preceded by a name coined from the names of a series of genera (e.g., "Lauterborniella/Zavrelia type" or "Doithrix/Pseudorthocladius group"). I make a very great effort to be deliberately conservative (if you like - a lumper) in naming the midge remains. I do not want to mislead future readers of my publications who might mistakenly assume a higher level of precision in my identifications, and thus, mistakenly use my data to draw unjustified conclusions concerning past ecological conditions or the past distributions of midge species and genera. To me this principle is far more important than trying to place a name on every specimen. So many new midge species and genera are being described every year that I think this is the only honest way to cope with the identifications.

In my usage "group" and "type" indicate some uncertainty in the identification. The suffix "type" indicates that the specimen very likely belongs to the genus, genera or species named - but a precise identification should not be assumed. I use the suffix "group" to indicate somewhat greater uncertainty. For example, the specimens I refer to as "Doithrix/Pseudorthocladius group" might belong to a number of genera apart from Doithrix or Pseudorthocladius. (Terrestrial and semi-terrestrial chironomids, such as these, are especially poorly studied. There are certainly a huge number of undescribed species; thus, it would be highly misleading to indicate a more precise level of identification.)

Similar difficulties with identifications are frequently encountered by pollen analysts. The system adopted here is adapted from that commonly employed in their work (e.g., Moore & Webb, 1978).

Moore, P.D., and J.A. Webb (1978). An Illustrated Guide to Pollen Analysis. Hodder and Stoughton, London. 133 pp.


(Biting Midges or "No-see-ums")

(Phantom Midges)


(Black Flies)

Miscellaneous Other Things:

©2007 Ian R. Walker. ALL RIGHTS RESERVED

Last Update: 29 January 2007

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