{{Short description|Species of mite}} {{Speciesbox |image=Fraxinus_pennsylvanica-Aceria_fraxini-upperside_galls.jpg |image_caption=galls on a leaf, upperside |image2=Fraxinus_pennsylvanica-Aceria_fraxini-underside_galls.jpg |image2_caption=galls on a leaf, underside |taxon=Aceria fraxini |authority=(Garman, 1883) }}
'''''Aceria fraxini''''', the '''ash bead gall mite''', is a species of mites in the family Eriophyidae, the gall mites.<ref name="inaturalist">{{cite web |title=Aceria fraxini (Ash Bead Gall Mite)|url=https://www.inaturalist.org/taxa/542186-Aceria-fraxini|website=iNaturalist |publisher=California Academy of Sciences }}</ref><ref name=gbif/>
==Ecology== Range is North America, including southern Canada and most of the continental United States.<ref name=gbif>{{GBIF |title=''Aceria fraxini'' (Garman, 1883) |id=4544532 |}}</ref>
Mites form numerous capsule galls, greenish-yellow in color, between leaf veins of ash trees in the genus ''Fraxinus'', including ''Fraxinus americana'', ''Fraxinus latifolia'', ''Fraxinus nigra'', and ''Fraxinus pennsylvanica''.<ref name='bugguide'>{{cite web |url=https://bugguide.net/node/view/392997 |title=Species ''Aceria fraxini''|website=BugGuide.net}}</ref><ref name='gallformers'>{{cite web|url=https://www.gallformers.org/gall/561|title=''Aceria fraxini''|publisher=Gallformers}}</ref> The mites stay in the galls until late summer when host leaves mature.<ref name="USDA">{{cite book|vauthors=Keifer HH, Baker EW, Kono T, Delfinado M, Styer WE|date=1982|title=An Illustrated Guide to Plant Abnormalities Caused by Eriophyid Mites in North America (Agriculture Handbook Number 573)|url=https://naldc.nal.usda.gov/download/CAT87208955/PDF|archive-url=https://web.archive.org/web/20140313103605/http://naldc.nal.usda.gov/download/CAT87208955/PDF|url-status=dead|archive-date=March 13, 2014|publisher=USDA Agricultural Research Service}}</ref>{{rp|50}}
The life cycle is a form of alternation of generations. An over-wintering generation consists only of females called deutogynes. The other generation consists of both sexes: females called protogynes as well as males.<ref name="USDA"/>{{rp|6}}
==References== {{Commons}} {{Reflist}}
{{Taxonbar|from=Q50363813}}
Category:Eriophyidae Category:Arachnids of Canada Category:Arachnids of the United States Category:Animals described in 1883 Category:Taxa named by Samuel Garman
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