You should ask Jenő Kontschán (he is on RG). He is an expert of Mesostigmata.

                       Csaba

Could well be a Phytoseiid but unfortunately, it's almost impossible to confirm, even to family, without it mounted on a slide.  

This free online key will give you an idea what kind of thing your looking for http://itp.lucidcentral.org/id/mites/invasive_mite/Invasive_Mite_Identification/key/Mesostigmata/Media/Html/Home_Mesostigmata_in_Quarantine.html 

Hope that helps!

On strawberries you can find a lot of species of predatory mite. it could be A.swirskii, N.californicus, N.cucumeris, A.limonicus, and others. The best is to mount on a slide and send it to Biobest in Belgium, Koppert in Netherlands, University of Wageningen NL or Mr Kreiter from SupAgro Montpellier, France.

Hi Rik,

Can you post some pictures of slides? Otherwise, you can indeed send some mites in alcohol (or alive) and we can identify it for you. Let me know if I can be of any help.

Best regards,

Dominiek

Hi Rik, 

Strawberries have a wide infestation with Tetranychus urticae, so that the predatory mites which may found like Phytoseiids, Phytoseiullus persimilis, Typhlodromips swirskii, Neoseiulus californicus and N. barkeri. These species are the most commercially used to control red spider mite.

Pictures are not so clear to me, but I handled phytoseiid mites before, and I could guess this are phytoseiids

To be more accurate, try to mount it on a slide, the tibia I has a chaetotaxa of 2/4/2 (Ref.: A Manual of Acarology, 2nd Ed. 2009) if you found that equation it is a phytoseiid and if not you can send them to Dr. A. K. NASR, a professional mesostegmata taxonomist (National Research Centre, El-Bohouth St., 12622 Dokki, Giza, Egypt. +20-01001965573; [email protected]).

Dr. F.M. MOMEN, she consider herself not a Phytoseiid taxonomist but a biologist. I truly knew that she could discriminate between life material according to their biology and feeding preference. (National Research Centre, El-Bohouth St., 12622 Dokki, Giza, Egypt. +20-01227534060. [email protected]).

Also, Dr. Ukermann in South Africa could help you well

Wish that find you well my friend, 

Best Regards,

Islam Zidan

Blattisociidae (Lasioseius)?

Hi Rik,

Although the photos are not clear as well, but I agree with Peterson R. Demite. It seems to be a species of Blattisociidae, not a phytoseiid mite. Better photos, especially from slides, are helpful for exact identification even for family level.

All the best,

Ali

Dear all,

Thank you for the information, here are some photos from the slide.

Kind regards,

Rik

Dear Rik

Hi

This is a species of Blattisociidae, Lasioseius genus.

Truly

Alireza

Dear Rik

Is a Lasioseius (Blattisocidae) with certainty.

This database could help you http://www.lea.esalq.usp.br/acari/blattisociidae/

* If you need some help my e-mail is [email protected] 

Jandir

Hi Rik

Many useful references 1

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFggnMAA&url=http%3A%2F%2Fhomeguides.sfgate.com%2Fcontrol-strawberry-spider-mites-73168.html&usg=AOvVaw30ga8QwGje6g6Sr-ejVKsC

2

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFgg2MAE&url=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC3958812%2F&usg=AOvVaw2KFYhRDhQWcONW3uNiGq5x

3

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFgg_MAI&url=https%3A%2F%2Fentomology.ces.ncsu.edu%2F2017%2F02%2Fits-time-to-scout-and-manage-spider-mites-in-strawberries%2F&usg=AOvVaw1BxIiwWDbdbgLd6CBiCxrE

4

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=9&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFghZMAg&url=https%3A%2F%2Fwww.agric.wa.gov.au%2Fstrawberries%2Fmite-pests-strawberry-crops&usg=AOvVaw3gGWj6YqgD9GbHJUdv79dh

5

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=10&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFghmMAk&url=https%3A%2F%2Fwww.agprofessional.com%2Farticle%2Fstrawberry-plant-health-requires-spider-mite-control&usg=AOvVaw1V8JsxbQetQuiafZKmeAYW

6

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=10&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFghmMAk&url=https%3A%2F%2Fwww.agprofessional.com%2Farticle%2Fstrawberry-plant-health-requires-spider-mite-control&usg=AOvVaw1V8JsxbQetQuiafZKmeAYW

7

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=11&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFghsMAo&url=https%3A%2F%2Fextension.psu.edu%2Fspider-mites-on-strawberries&usg=AOvVaw2xkTy_CwcyuOUHKoExu_Sd

8

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFghxMAs&url=http%3A%2F%2Fipm.ucanr.edu%2FPMG%2Fr734400111.html&usg=AOvVaw22M6gWTMio7FjvFB6GPYpo

9

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFghxMAs&url=http%3A%2F%2Fipm.ucanr.edu%2FPMG%2Fr734400111.html&usg=AOvVaw22M6gWTMio7FjvFB6GPYpo

10

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=13&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFgh_MAw&url=http%3A%2F%2Fucanr.edu%2Fblogs%2Fblogcore%2Fpostdetail.cfm%3Fpostnum%3D20391&usg=AOvVaw1lmI2zxyb0vSyibITfoE4E

11

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&cad=rja&uact=8&ved=0ahUKEwjns4-n_qbbAhXlKJoKHW2BCicQFgiFATAN&url=https%3A%2F%2Fwww.planetnatural.com%2Fpest-problem-solver%2Fhouseplant-pests%2Fspider-mite-control%2F&usg=AOvVaw1IDMb8lbTxrtz0rqaTot1Y

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=11&cad=rja&uact=8&ved=0ahUKEwj95uKghqfbAhWkJZoKHZMaCqQ4ChAWCCYwAA&url=http%3A%2F%2Fwww.missouribotanicalgarden.org%2Fgardens-gardening%2Fyour-garden%2Fhelp-for-the-home-gardener%2Fadvice-tips-resources%2Fpests-and-problems%2Finsects%2Fmites%2Fcyclamen-mites-on-strawberry.aspx&usg=AOvVaw0anbQCSWPVnt0cIWlcmRSS

13

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=0ahUKEwj95uKghqfbAhWkJZoKHZMaCqQ4ChAWCC0wAQ&url=https%3A%2F%2Fextension.umd.edu%2Flearn%2Fmites-two-types-found-strawberries&usg=AOvVaw398JDoYCq4kA4tcziU-2cR

14

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=16&cad=rja&uact=8&ved=0ahUKEwj95uKghqfbAhWkJZoKHZMaCqQ4ChAWCEMwBQ&url=http%3A%2F%2Fwww.growingproduce.com%2Ffruits%2Fberries%2Fmanaging-spider-mites%2F&usg=AOvVaw1f7TtW-GLBS_gqzM0piA71

15

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=17&cad=rja&uact=8&ved=0ahUKEwj95uKghqfbAhWkJZoKHZMaCqQ4ChAWCEgwBg&url=https%3A%2F%2Fwww1.agric.gov.ab.ca%2F%24department%2Fdeptdocs.nsf%2Fall%2Fprm2561&usg=AOvVaw00JWQnKM6egOCSrkzS53xh

16

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=19&cad=rja&uact=8&ved=0ahUKEwj95uKghqfbAhWkJZoKHZMaCqQ4ChAWCFUwCA&url=https%3A%2F%2Fwww.clemson.edu%2Fextension%2Fpublications%2Fentomology%2Ffruit-vegetable%2Ftwospotted-spider-mites-in-strawberry-fv11.html&usg=AOvVaw1M6grrV9ycPHKIywEXKehO

17

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=20&cad=rja&uact=8&ved=0ahUKEwj95uKghqfbAhWkJZoKHZMaCqQ4ChAWCFowCQ&url=https%3A%2F%2Fwww.researchgate.net%2Fpublication%2F268278138_Biology_of_the_Two-Spotted_Spider_Mite_on_Strawberry_Plants&usg=AOvVaw1it0lXRw2dd1WQXH3GnpiT

18

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=21&cad=rja&uact=8&ved=0ahUKEwjpgKPlkKfbAhUEJ5oKHawlDgM4FBAWCCYwAA&url=https%3A%2F%2Fwww.daf.qld.gov.au%2Fbusiness-priorities%2Fplants%2Ffield-crops-and-pastures%2Fbroadacre-field-crops%2Fintegrated-pest-management%2Fa-z-insect-pest-list%2Fmites-overview%2Fstrawberry-spider-mite&usg=AOvVaw1ctyk5VMnaO5eGMUqWYnkG

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=22&cad=rja&uact=8&ved=0ahUKEwjpgKPlkKfbAhUEJ5oKHawlDgM4FBAWCCwwAQ&url=http%3A%2F%2Fwww.hos.ufl.edu%2Fvegetarian%2F05%2FFebruary%2FRondon.htm&usg=AOvVaw3ANJ2yVTYGslt5qP14t-dH

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=24&cad=rja&uact=8&ved=0ahUKEwjpgKPlkKfbAhUEJ5oKHawlDgM4FBAWCDgwAw&url=http%3A%2F%2Fwww.calstrawberry.com%2FPortals%2F2%2FReports%2FResearch%2520Reports%2FProduction%2520Guidelines%2FEnglish%2FManaging%2520Spider%2520Mites%2520in%2520Strawberries%2520-%25202007.pdf%3Fver%3D2018-01-12-155446-760&usg=AOvVaw3fQpJMOlNJ2OVwfw9teZsb

Did you succeed in this?

Macrochelidae