Well, it is finally here.
In November of 2012, the Joint Annual Meeting of the Entomological Society of Canada and the Entomological Society of Alberta kicked off with a great plenary symposium on Arthropod Biodiversity. The speakers were uniformly excellent, featuring Dr. Daniel Rubinoff on The evolution of extraordinary biodiversity in Hawaii’s endemic insects, followed by Dr. Jeremy Kerr on Detecting and predicting global impacts on butterflies in Canada and then closing with a most delightful talk by Dr. Wayne Maddison on “Jumping Spider Melodies“. Even before I had finished packing up the equipment, I was approached by the fly-guy, Morgan Jackson, saying that his tweets had resulted in requests for some way to access a recording of the talk on Jumping Spiders. With Dr. Maddison’s permission, and with his Power Point slides, I stitched together the following video. Final permissions from Dr.Damian Elias came in last week, so the video is now ready for viewing. Although the video quality is not great, the content is fascinating!
From the printed introduction to the lecture:
The beautiful diversity of jumping spiders holds patterns that are replicated across phylogeny. In the genus Habronattus, multiple evolutionary origins of Y sex chromosomes are associated with distal chiasmata, supporting a proposed constraint hypothesis. In the family as a whole, large-scale evolutionary radiations have occurred in different continental regions independently, yielding similar spectra of body forms and ecologies in each region.
(Any errors in the following reconstruction are my own: please notify me of any problems in the comments)
Please see the supplementary videos and charts….
♦ The spider song and dance routine: Habronattus brunneus video at 4:36 —
♦ This first tree shows the evolution of chromosomes, neo-Y vs. not., and the music for this tree begins at 29:38. The second tree shows chiasma
♦ The collecting video at about 33:38 —
(Edited for brevity: 7 February, 2012)