06 de octubre de 2022

Mystery mines on Cape-ivy (Delairea odorata )

Here's another one I'm really hoping someone can collect and rear. The South African moth Digitivalva delaireae is being considered as a potential biological control agent for Cape-ivy in California and Oregon, but meanwhile people have been regularly observing some native(?) leafminer on this plant, and no one knows what it is. There is typically a roughly circular brown spot at the beginning, where the mine is apparently contorted or forms a tight spiral, and this suggests to me that the fly is something other than just one of the polyphagous Liriomyza species that are common in southern California. Although mines have been observed in just about every month of the year, the only one with a larva inside was found on April 11 in Marin County.

photo of agromyzid mine in a Cape-ivy leaf @thetorterra, Santa Cruz Co., 1/16/2022

photo of agromyzid mine in a Cape-ivy leaf @manidae, Los Angeles Co., 3/28/2020

photo of agromyzid mine in a Cape-ivy leaf @marionanoiram, Marin Co., 4/11/2016 [larva present]

photo of agromyzid mine in a Cape-ivy leaf @nealkelso, San Francisco Co., 4/24/2021

photo of agromyzid mine in a Cape-ivy leaf @garth_harwood, San Mateo Co., 6/4/2020

photo of agromyzid mine in a Cape-ivy leafphoto of agromyzid mine in a Cape-ivy leaf @sea-kangaroo & @leslie_flint, San Mateo Co., 6/16/2019

photo of agromyzid mine in a Cape-ivy leaf @silversea_starsong, Orange Co., 7/4/2021

photo of agromyzid mine in a Cape-ivy leaf @ctrubo, Los Angeles Co., 7/18/2022

photo of agromyzid mine in a Cape-ivy leaf @cynestor, Santa Barbara Co., 7/23/2022

photo of agromyzid mine in a Cape-ivy leaf @dlbowls, San Luis Obispo Co., 8/9/2021

photo of agromyzid mine in a Cape-ivy leaf @cynestor, Ventura Co., 8/27/2022

photo of agromyzid mine in a Cape-ivy leaf @esppim, San Francisco Co., 8/31/2021

photo of agromyzid mine in a Cape-ivy leaf @sea-kangaroo, Monterey Co., 9/18/2021

photo of agromyzid mine in a Cape-ivy leaf @danieldas, San Francisco Co., 9/19/2021

photo of agromyzid mine in a Cape-ivy leaf @gyrrlfalcon, San Mateo Co., 10/16/2019

photo of agromyzid mine in a Cape-ivy leaf @conormcmahon, Santa Barbara Co., 10/18/2021

photo of agromyzid mine in a Cape-ivy leaf @bugornot, Orange Co., 11/2/2020

photo of agromyzid mine in a Cape-ivy leaf @nealkelso, San Francisco Co., 11/8/2020

photo of agromyzid mine in a Cape-ivy leafphoto of agromyzid mine in a Cape-ivy leaf @nealkelso, San Francisco Co., 11/16/2020

photo of agromyzid mine in a Cape-ivy leaf @nealkelso, San Francisco Co., 11/17/2021

photo of agromyzid mine in a Cape-ivy leaf @wxynez, Los Angeles Co., 12/1/2021

photo of agromyzid mine in a Cape-ivy leaf @thetorterra, Santa Cruz Co., 12/6/2021

photo of agromyzid mine in a Cape-ivy leaf @jon_sullivan, Monterey Co., 12/30/2018

Ingresado el 06 de octubre de 2022 por ceiseman ceiseman | 0 comentarios | Deja un comentario

09 de abril de 2022

Mystery mine on Lantana

Another commonly observed mystery leafminer that I'm hoping someone can collect and rear: An Ophiomyia species (Agromyzidae) that forms winding linear mines on Lantana camara, L. x hybrida, and maybe other Lantana spp., in California, Texas, Mississippi, Alabama, and Florida. The well-known species O. camarae makes a mine based on the midrib, with short extensions into the blade along either side:
photo of Ophiomyia mine in a Lantana leaf @silversea_starsong, Mission, TX, 11/5/2021
The mystery mines are not based on the midrib, although they sometimes have similar short branches where they encounter lateral veins. It's conceivable that they are made by the same species, but adults need to be reared to confirm this.
photo of Ophiomyia mine in a Lantana leaf @susanhewitt, Carlsbad, CA, 10/1/2019
photo of Ophiomyia mine in a Lantana leaf @dan_johnson, Houston, TX, 10/6/2019
photo of Ophiomyia mine in a Lantana leafphoto of Ophiomyia mine in a Lantana leaf @kimberlietx, Southlake, TX, 6/16/2020 (note long lower-surface portion in this example)
photo of Ophiomyia mine in a Lantana leaf @victorengel, Austin, TX, 7/2/2020
photo of Ophiomyia mine in a Lantana leafphoto of Ophiomyia mine in a Lantana leaf @silversea_starsong, Newport Beach, CA, 7/15/2020 (another example with a long lower-surface portion)
photo of Ophiomyia mine in a Lantana leaf @silversea_starsong, Garden Grove, CA, 10/26/2020
photo of Ophiomyia mine in a Lantana leaf @wsweet321, Long Beach, CA, 11/1/2020
photo of Ophiomyia mine in a Lantana leaf @terit, Natchez, MS, 11/15/2020
photo of Ophiomyia mine in a Lantana leaf @wsweet321, Long Beach, CA, 1/24/2021
photo of Ophiomyia mine in a Lantana leaf @sessilefielder, Los Angeles Co., CA, 1/2021
photo of Ophiomyia mine in a Lantana leaf @chalon9, El Cajon, CA, 7/23/2021
photo of Ophiomyia mine in a Lantana leaf @joemdo, Medley, FL, 7/26/2021 (this one has a distinct frass line and may have been made by a different species)
photo of Ophiomyia mine in a Lantana leafphoto of Ophiomyia mine in a Lantana leaf @silversea_starsong, Orange, CA, 8/23/2021 (the first example follows the lateral veins a lot)
photo of Ophiomyia mine in a Lantana leaf @biocowboy, Long Beach, CA, 8/24/2021
photo of Ophiomyia mine in a Lantana leaf @wsweet321, Long Beach, CA, 9/16/2021
photo of Ophiomyia mine in a Lantana leaf @milliebasden, San Diego, CA, 9/28/2021
photo of Ophiomyia mine in a Lantana leaf @vcharny, Dauphin Island, AL, 10/11/2021
photo of Ophiomyia mine in a Lantana leaf @silversea_starsong, Mission, TX, 11/5/2021
photo of Ophiomyia mine in a Lantana leaf @sessilefielder, Los Angeles, CA, 3/13/2022

Ingresado el 09 de abril de 2022 por ceiseman ceiseman | 3 comentarios | Deja un comentario

31 de enero de 2022

Mystery mine on Pacific hound's tongue (Adelinia grande)

This is the first in what I expect to be a series of posts highlighting commonly observed mystery leaf mines. My hope is that people will keep an eye out for them and collect any occupied ones so that adult insects can be reared and we can put names to them. You can click on any of the images below to get to the original observations. These are all mines of some unknown agromyzid fly on Pacific hound's tongue (Adelinia grande); they have been found in several California counties. Empty mines have been found as early as March 9; no one has yet found ones that clearly have larvae inside, although some photos taken in late May show small and fresh-looking mines, so there may be two generations per year.

photo of agromyzid mine on a leaf of Adelinia grande photo of agromyzid mine on a leaf of Adelinia grande photo of agromyzid mine on a leaf of Adelinia grande @sea-kangaroo, San Mateo Co., CA, 3/9/2018, 5/29/2019, 6/10/2020


photo of agromyzid mine on a leaf of Adelinia grande @temminicki, San Mateo Co., CA, 3/11/2018


photo of agromyzid mine on a leaf of Adelinia grande @merav, Santa Clara Co., CA, 3/14/2021


photo of agromyzid mine on a leaf of Adelinia grande @debkccb, San Mateo Co., CA, 3/15/2020


photo of agromyzid mine on a leaf of Adelinia grande @u_phantasticus, San Mateo Co., CA, 3/20/2020


photo of agromyzid mine on a leaf of Adelinia grande photo of agromyzid mine on a leaf of Adelinia grande @chloe_and_trevor, Marin Co., CA, 3/31/2021, 4/22/2021


photo of agromyzid mine on a leaf of Adelinia grande @cmaci, San Mateo Co., CA, 4/4/2020


photo of agromyzid mine on a leaf of Adelinia grande @zufi, San Mateo Co., CA, 4/9/2021


photo of agromyzid mine on a leaf of Adelinia grande @selwynq, San Mateo Co., CA, 4/11/2021


photo of agromyzid mine on a leaf of Adelinia grande @elonicera, Santa Clara Co., CA, 4/14/2021


photo of agromyzid mine on a leaf of Adelinia grande @melanopygus, Marin Co., CA, 4/29/2018


photo of agromyzid mine on a leaf of Adelinia grande photo of agromyzid mine on a leaf of Adelinia grande @leslie_flint, San Mateo Co., CA, 4/30/2021, 5/4/2020


photo of agromyzid mine on a leaf of Adelinia grande photo of agromyzid mine on a leaf of Adelinia grande photo of agromyzid mine on a leaf of Adelinia grande photo of agromyzid mine on a leaf of Adelinia grande @gyrrlfalcon, San Mateo Co., CA, 4/16/2021, 5/4/2020, 6/5/2020


photo of agromyzid mine on a leaf of Adelinia grande @leptonia, Santa Cruz Co., CA, 5/10/2017


photo of agromyzid mine on a leaf of Adelinia grande @owicki, Santa Clara Co., CA, 5/11/2020


photo of agromyzid mine on a leaf of Adelinia grande @kzias, San Mateo Co., CA, 5/24/2020


photo of agromyzid mine on a leaf of Adelinia grande @hoechsle, Santa Cruz Co., CA, 5/30/2019


photo of agromyzid mine on a leaf of Adelinia grande @calloohcallay, San Mateo Co., CA, 5/30/2020


Update, 3/11/2022: People have found some occupied mines in 2022!


photo of agromyzid mine on a leaf of Adelinia grande @gina-barton, Santa Clara Co., CA, 3/5/2022


Having seen this puparium that @nancyasquith got from one of these mines (Santa Clara Co., CA, 3/10/2022), I'm now reasonably sure this is an Agromyza species.

photo of agromyzid mine on a leaf of Adelinia grande

Ingresado el 31 de enero de 2022 por ceiseman ceiseman | 3 comentarios | Deja un comentario

25 de junio de 2021

Leafminer e-book now available on a sliding scale

Hi everyone,

In the interest of making leafminer identification more accessible, you can now get the first edition of the Leafminers of North America e-book for as little as $5 US. For details, see today's BugTracks post.

Charley

Ingresado el 25 de junio de 2021 por ceiseman ceiseman | 3 comentarios | Deja un comentario

01 de abril de 2021

Online seminar - Leaf and Stem Mining Insects of the Southern USA

On Thursday evenings from April 29 to May 27 I'll be offering a "Leaf & Stem Mining Insects of the Southern USA" online seminar. "Southern" is anywhere that spring is far enough along for there to be plenty of leaf mines to observe! Details here.

Ingresado el 01 de abril de 2021 por ceiseman ceiseman | 2 comentarios | Deja un comentario

10 de julio de 2020

Interactive leafminer ID webinar

Hello again,

I'm offering a 5-part interactive online seminar on identifying North American leafminers, on Saturday evenings starting July 25. For details see https://www.eaglehill.us/programs/sems-online/calendar-online.shtml

Hope some of you can make it!

Charley

Ingresado el 10 de julio de 2020 por ceiseman ceiseman | 0 comentarios | Deja un comentario

09 de julio de 2020

Attention leafminer hunters!

Until further notice, I am offering a free subscription to the 2nd edition of Leafminers of North America to anyone who sends me material of western grape Phyllocnistis suitable for DNA barcoding (i.e., larvae, pupae, or reared adults; not just empty mines--but a mine with a dead, dried larva inside may work). I'm after the mines with the distinct narrow central frass line, like this one:
https://www.inaturalist.org/observations/3900879
So far they have been found in California, Utah, Colorado, and Arizona (in one case on Parthenocissus, which I'd happily accept too). Although this mine type is my primary target, I'll accept western examples of Phyllocnistis vitegenella (the "snail trail" one) for now too. By western I mean west of the Great Plains.

And so people east of the Rockies don't feel left out, I'll also extend this offer to anyone who can collect mines containing larvae (dead or alive) of the mysterious nepticulid moth on dogwood (Cornus spp.). The mines are entirely linear and look much like those of Phytomyza agromyzina at first glance, but the frass is in a central line rather than alternating along the sides, the larva will have a distinct head capsule, and there will be a tiny, shining eggshell at the beginning of the mine (possibly on the lower leaf surface). I don't think I've seen any examples on iNat yet, but empty mines have been found in Ontario, Iowa, Ohio, and Vermont. Here is one I found in southern Ohio on August 6 a few years ago. That's my only datapoint as far as when an occupied mine can be found; the few other examples have been found later in the season, already empty.

If you think you've got what I'm looking for, post the observation and message me!

Ingresado el 09 de julio de 2020 por ceiseman ceiseman | 3 comentarios | Deja un comentario

22 de junio de 2020

Free leafminer webinar on June 24

Hi everyone,

Here's a link to register for a leafminer webinar I'm presenting on Wednesday evening: https://us02web.zoom.us/webinar/register/WN_tOA3peW6TB6JUzQBJ_fImQ
Hope to see you there!

Charley

Ingresado el 22 de junio de 2020 por ceiseman ceiseman | 12 comentarios | Deja un comentario

06 de mayo de 2020

Leafminer common names

Hi everyone,

A friendly reminder that the curator guide says "try to add names at the taxonomic level where they describe all members of that taxon and only members of that taxon. If a species has no common name in usage, please don't make one up."

Very few leafminers have established common names, and there are a lot of examples of newly made-up ones on iNaturalist. Often they take the form of "[host plant] leafminer." Since there is hardly any plant with just one species of leafminer on it, this practice leads to many absurdly wrong IDs (and frankly the same problem exists with most of the "official" common names that do exist for leafminers). I'm starting to delete these bogus names as I come across them, now that I've figured out how to do it. Please don't introduce any new ones.

Thanks,

Charley

Ingresado el 06 de mayo de 2020 por ceiseman ceiseman | 7 comentarios | Deja un comentario

11 de enero de 2020

All caught up!

Hi everyone,

Nearly a year after creating it, there are now 5583 observations in the North American Leafminers umbrella project (https://www.inaturalist.org/projects/north-american-leafminers), and I've just finished reviewing all of them. A couple of notes:

I think that's it for now. Keep up the good work!

Charley

Ingresado el 11 de enero de 2020 por ceiseman ceiseman | 5 comentarios | Deja un comentario