2017 to-date psyllid statistics
4 months into 2017, and collectively there have been 148 observations of 36 species so far. Of those 36, four species have never been photographed prior. Statistically, May and June are the best two months for psyllids (averaging 55 species per month across all years), so numbers are likely to increase in the next two months. Here are some other statistics:
Most observed species
| Species | Unique contributors | Total observations |
| Glycaspis brimblecombei | 9 | 20 |
| Pachypsylla venusta | 7 | 8 |
| Ctenarytaina eucalypti | 6 | 10 |
| Trioza eugeniae | 5 | 11 |
| Ctenarytaina spatulata | 5 | 6 |
| Pachypsylla celtidismamma | 5 | 5 |
| Baeoalitriozus diospyri | 4 | 4 |
| Cacopsylla curta | 3 | 15 |
| Calophya californica | 3 | 6 |
| Bactericera cockerelli | 3 | 4 |
| Calophya schini | 3 | 4 |
Observations per state
| State | Observations | Total species |
| California | 103 | 22 |
| Texas | 20 | 6 |
| Arizona | 15 | 4 |
| Tennessee | 4 | 4 |
Top Observers
| Person | Total species | Total observations |
| Chris Mallory | 10 | 24 |
| James Bailey | 8 | 11 |
| Alice Abela | 6 | 12 |
| Jesse Rorabaugh | 6 | 11 |
| Salvador Vitanza | 5 | 15 |
| Rebecca Marschall | 4 | 9 |
| Ron Matsumoto | 3 | 10 |
Misc.
55% of observations represent native species45% of observations represent introduced species
99% of observations identified to at least genus (compared to 97% average from previous years)
95% of observations identified to species (compared to 81% average from previous years)
New species for 2017
Trioza phoradendri first found by Jesse Rorabaugh in CACacopsylla nigranervosa first found by Alice Abela in CA
Leuronota maculata first found by Salvador Vitanza in AZ
Aphalaroida spinifera first found by Salvador Vitanza in AZ
In 2016 there were 17 species recorded that had not been photographed prior. I think that number may be untouchable this year, but who knows!
I'm sure I'm probably the only person that cares about these statistics. But, at least I'm not the only one who cares about these insects, or at least cares enough about them to photograph them :)
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Well, now I at least know what they look like! I can't imagine having trouble getting another dozen.
Are there any species associated with vernal pools? (if you know of any other terrestrial invertebrates that might hang around such habitats, and are endemic to those areas, let me know).
Hmmm, not particularly. Or at least, nothing specific to plants specific to vernal pools. A few species are associated with plants typical of other types of wetlands, such as Livia spp. on Carex and Juncus, Aphalara spp. on Persicaria & Rumex, and Bactericera & Cacopsylla spp. on Salix. But that's about it I'd say.
So no Livia on Eleocharis yet? I can check some of the little Persicaria plants. Are Aphalara on non-native Rumex too (i.e. crispus)?
If there's anything on Eleocharis, nobody knows about it yet :) For our Rumex psyllid, I have records from both native species such as Rumex conglomeratus as well as non-native R. crispus.
As promised here's a list of our native California psyllids, their host plants, and some other data. It's a draft copy, and it's incomplete and not ready for prime time... but all the species and their hosts are there so that's better than nothing. If you go to Data > Filter Views, there are some useful functions for visualizing the data, such as sorting by the host, hiding species not present in certain regions (but note that the data is incomplete for that), or showing only species that have been commonly/rarely collected, etc. Hopefully you may find it useful despite its incompleteness.
https://docs.google.com/spreadsheets/d/1ysw7MG4gv1gcJLaBdV0L1B5bpCRV4CyUnY4QdjZDPSY/edit?usp=sharing
Also: up-to-date 2017 psyllid observation statistics:
https://docs.google.com/spreadsheets/d/1rw-I7pMLVicUnWS96gPaGRhPR907zOnQwyRX1YL0azY/pubhtml?gid=177577037&single=true
Awesome spreadsheets, Chris! Thanks for sharing!
I'm beginning to doubt the existence of psyllids on Artemisia californica! I've looked over and shaken up so many of these from all over Southern CA, including on Santa Cruz, and nada.
Your results mirror mine so far. Checked a bunch of sagebrush in the santa monica mountains yesterday and came up with nothing psyllid-wise.
Perhaps Artemisia tridentata may be more lucrative. At least with that plant, there are confirmed records of nymphs as well as adults, so the host confirmation is definite.
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