INDEX TO MIDGE IMAGES
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
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.
- Subfamily Chironominae:
- Tribe Chironomini:
- Tribe Pseudochironomini:
- Tribe Tanytarsini:
- Subtribe Tanytarsina:
- Subtribe Zavreliina:
- Subfamily Diamesinae:
- Subfamily Orthocladiinae:
- Subfamily Podonominae:
sp.1 (I originally thought this was an Orthoclad - but Peter Cranston
thinks it may be one of the Podonominae. Any other opinions?)
- Subfamily Prodiamesinae:
- (sorry, no photos available)
- Subfamily Tanypodinae:
- Tribe Pentaneurini:
- Other Tanypodinae:
(Biting Midges or "No-see-ums")
Miscellaneous Other Things:
Order Ephemeroptera (Mayflies)
Order Acarina (Mites)
- A Mite - Maria Hartley's
comment: "I don't know if your mite was a mystery, but I believe
it belongs to the suborder Cryptostigmata, possibly family Metrioppia.
I've attached a picture of
a similar mite (different family) from the middle canopy of a 'Natural'
forest in Texas."
©2007 Ian R. Walker. ALL RIGHTS RESERVED
Last Update: 29 January 2007