The galls of the midge Polystepha pilulae in Baltimore Co., Maryland (8/31/2014).
Polystepha pilulae in Dorchester Co., Maryland (9/14/2014). Verified by Charley Eiseman/BugGuide.
Polystepha pilulae galls in Harford Co., Maryland (8/25/2019). Verified by Charley Eiseman/BugGuide.
A Polystepha pilulae leaf gall measuring 3 mm in diameter in Harford Co., Maryland (6/9/2018).
The galls of Polystepha pilulae on Southern Red Oak in Somerset Co., Maryland (9/15/2013).
The galls of Polystepha pilulae in Baltimore City, Maryland (9/22/2011). Determined by Charley Eiseman/BugGuide.
The galls of Polystepha pilulae in Baltimore City, Maryland (9/22/2011). Determined by Charley Eiseman/BugGuide.
Polystepha pilulae in Prince George's Co., Maryland (9/13/2013). (c) treichard, all rights reserved.
Polystepha pilulae in Allegany Co., Maryland (8/23/2019). (c) Andy Gougherty, some rights reserved (CC BY-NC).
Polystepha pilulae in Howard Co., Maryland (9/28/2019). (c) Judy Gallagher, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (9/20/2015). (c) Carrie Seltzer, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (9/20/2015). (c) Carrie Seltzer, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (10/2/2017). (c) mmn noriko, some rights reserved (CC BY-NC).
Polystepha pilulae in Howard Co., Maryland (9/28/2019). (c) Ashley M Bradford, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (6/26/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae galls in Harford Co., Maryland (8/13/2017).
Polystepha pilulae in Washington Co., Maryland (7/7/2018). (c) Mark Etheridge, some rights reserved (CC BY-NC).
Polystepha pilulae in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (10/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Washington Co., Maryland (7/7/2018). (c) Mark Etheridge, some rights reserved (CC BY-NC).
Polystepha pilulae in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (10/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (10/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (Date obscured). (c) Jennifer Wright, some rights reserved (CC BY-NC).
Polystepha pilulae in Dorchester Co., Maryland (9/4/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (9/17/2017). (c) Elissa Totin, some rights reserved (CC BY).
Polystepha pilulae in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).
A Polystepha pilulae larva in Harford Co., Maryland (10/14/2021). Verified by Yann Kemper/iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (8/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (8/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (9/26/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (8/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (10/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (6/23/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (7/6/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Harford Co., Maryland (8/16/2022). (c) kidneymoth, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (7/6/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Anne Arundel Co., Maryland (9/16/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Prince George's Co., Maryland (7/16/2022). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Prince George's Co., Maryland (8/11/2022). (c) Benjamin Burgunder, some rights reserved (CC BY).
Polystepha pilulae in Garrett Co., Maryland (7/13/2023). (c) Mark Etheridge, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (6/13/2023). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Garrett Co., Maryland (Date obscured). (c) Brady O'Brien, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (7/6/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (7/6/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (8/4/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Anne Arundel Co., Maryland (6/26/2022). (c) Wayne Longbottom, some rights reserved (CC BY-NC).
Polystepha pilulae in Anne Arundel Co., Maryland (8/17/2022). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Queen Anne's Co., Maryland (9/6/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (8/4/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Queen Anne's Co., Maryland (9/6/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (6/26/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Queen Anne's Co., Maryland (9/6/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
Polystepha pilulae in Anne Arundel Co., Maryland (9/20/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Allegany Co., Maryland (6/19/2022). (c) Anne DeNovo, some rights reserved (CC BY-NC).
Polystepha pilulae in Anne Arundel Co., Maryland (8/17/2022). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Queen Anne's Co., Maryland (9/6/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (9/27/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Harford Co., Maryland (8/16/2022). (c) kidneymoth, some rights reserved (CC BY-NC).
Polystepha pilulae in Baltimore Co., Maryland (9/21/2022). (c) Zachary Wimberly, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (9/29/2022). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Anne Arundel Co., Maryland (9/20/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Anne Arundel Co., Maryland (6/24/2022). (c) Matthew Beziat, some rights reserved (CC BY-NC).
Polystepha pilulae in Calvert Co., Maryland (10/4/2022). (c) Matthew Beziat, some rights reserved (CC BY-NC).
Polystepha pilulae in Anne Arundel Co., Maryland (6/24/2022). (c) Matthew Beziat, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (9/29/2022). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Anne Arundel Co., Maryland (9/11/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Montgomery Co., Maryland (8/4/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (10/12/2021). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Anne Arundel Co., Maryland (7/15/2021). (c) Matthew Beziat, some rights reserved (CC BY-NC).
Polystepha pilulae in Anne Arundel Co., Maryland (9/11/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Garrett Co., Maryland (9/3/2022). (c) maryland adventure babe, some rights reserved (CC BY-NC).
Polystepha pilulae in Worcester Co., Maryland (7/23/2022). (c) Jim Brighton, some rights reserved (CC BY-NC).
Polystepha pilulae in Anne Arundel Co., Maryland (9/11/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Allegany Co., Maryland (6/19/2022). (c) Anne DeNovo, some rights reserved (CC BY-NC).
Polystepha pilulae in Worcester Co., Maryland (7/23/2022). (c) Jim Brighton, some rights reserved (CC BY-NC).
Polystepha pilulae in Garrett Co., Maryland (Date obscured). (c) Josh Emm, some rights reserved (CC BY-NC).
Polystepha pilulae in Anne Arundel Co., Maryland (8/11/2022). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Anne Arundel Co., Maryland (9/24/2022). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Anne Arundel Co., Maryland (9/24/2022). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Prince George's Co., Maryland (7/30/2021). (c) Matthew Beziat, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (6/13/2023). (c) Katja Schulz, some rights reserved (CC BY).
Polystepha pilulae in Anne Arundel Co., Maryland (9/24/2022). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Caroline Co., Maryland (8/18/2024). (c) Wayne Longbottom, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Anne Arundel Co., Maryland (9/20/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Anne Arundel Co., Maryland (6/19/2022). (c) Matthew Beziat, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (9/29/2022). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Allegany Co., Maryland (6/19/2022). (c) Anne DeNovo, some rights reserved (CC BY-NC).
Polystepha pilulae in Montgomery Co., Maryland (10/21/2016). (c) gail, some rights reserved (CC BY-NC).
Polystepha pilulae in Garrett Co., Maryland (Date obscured). (c) Josh Emm, some rights reserved (CC BY-NC).
Polystepha pilulae in Prince George's Co., Maryland (10/21/2022). (c) Jenny Glenn, some rights reserved (CC BY-NC).
Polystepha pilulae in Anne Arundel Co., Maryland (8/17/2022). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Anne Arundel Co., Maryland (9/20/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Montgomery Co., Maryland (9/29/2022). (c) Emily Summerbell, some rights reserved (CC BY).
Polystepha pilulae in Anne Arundel Co., Maryland (9/24/2022). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Anne Arundel Co., Maryland (9/11/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Anne Arundel Co., Maryland (9/16/2021). (c) Timothy Reichard, all rights reserved.
Polystepha pilulae in Baltimore Co., Maryland (10/3/2022). (c) Ron Wertz, some rights reserved (CC BY-NC-SA).
Polystepha pilulae in Montgomery Co., Maryland (7/24/2023). (c) Annie Weissman, some rights reserved (CC BY).
Polystepha pilulae in Montgomery Co., Maryland (7/24/2023). (c) Annie Weissman, some rights reserved (CC BY).
Map Snapshot
154 Records
Seasonality Snapshot
Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.
The galls of the midge Polystepha pilulae in Baltimore Co., Maryland (8/31/2014).
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Media by
Richard Orr.
Polystepha pilulae in Dorchester Co., Maryland (9/14/2014). Verified by Charley Eiseman/BugGuide.
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Media by
Mark Etheridge.
Polystepha pilulae galls in Harford Co., Maryland (8/25/2019). Verified by Charley Eiseman/BugGuide.
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Media by
Dave Webb.
A Polystepha pilulae leaf gall measuring 3 mm in diameter in Harford Co., Maryland (6/9/2018).
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Media by
Dave Webb.
The galls of Polystepha pilulae on Southern Red Oak in Somerset Co., Maryland (9/15/2013).
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Media by
Jim Brighton.
The galls of Polystepha pilulae in Baltimore City, Maryland (9/22/2011). Determined by Charley Eiseman/BugGuide.
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Media by
Thomas Wilson.
The galls of Polystepha pilulae in Baltimore City, Maryland (9/22/2011). Determined by Charley Eiseman/BugGuide.
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Media by
Thomas Wilson.
Polystepha pilulae in Prince George's Co., Maryland (9/13/2013). (c) treichard, all rights reserved.
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Timothy Reichard.
Polystepha pilulae in Allegany Co., Maryland (8/23/2019). (c) Andy Gougherty, some rights reserved (CC BY-NC).
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Andy Gougherty via iNaturalist.
Polystepha pilulae in Howard Co., Maryland (9/28/2019). (c) Judy Gallagher, some rights reserved (CC BY-NC).
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Media by
Judy Gallagher.
Polystepha pilulae in Montgomery Co., Maryland (9/20/2015). (c) Carrie Seltzer, some rights reserved (CC BY-NC).
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Carrie Seltzer via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (9/20/2015). (c) Carrie Seltzer, some rights reserved (CC BY-NC).
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Carrie Seltzer via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (10/2/2017). (c) mmn noriko, some rights reserved (CC BY-NC).
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mmn_noriko via iNaturalist.
Polystepha pilulae in Howard Co., Maryland (9/28/2019). (c) Ashley M Bradford, some rights reserved (CC BY-NC).
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Ashley Bradford.
Polystepha pilulae in Montgomery Co., Maryland (6/26/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae galls in Harford Co., Maryland (8/13/2017).
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Media by
Dave Webb.
Polystepha pilulae in Washington Co., Maryland (7/7/2018). (c) Mark Etheridge, some rights reserved (CC BY-NC).
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Media by
Mark Etheridge.
Polystepha pilulae in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).
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Media by
Mark Etheridge.
Polystepha pilulae in Montgomery Co., Maryland (10/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Washington Co., Maryland (7/7/2018). (c) Mark Etheridge, some rights reserved (CC BY-NC).
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Media by
Mark Etheridge.
Polystepha pilulae in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).
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Media by
Mark Etheridge.
Polystepha pilulae in Montgomery Co., Maryland (10/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).
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Media by
Mark Etheridge.
Polystepha pilulae in Montgomery Co., Maryland (10/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (Date obscured). (c) Jennifer Wright, some rights reserved (CC BY-NC).
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Jennifer Wright via iNaturalist.
Polystepha pilulae in Dorchester Co., Maryland (9/4/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
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Media by
Jim Brighton.
Polystepha pilulae in Montgomery Co., Maryland (9/17/2017). (c) Elissa Totin, some rights reserved (CC BY).
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Elissa Totin via iNaturalist.
Polystepha pilulae in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).
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Media by
Mark Etheridge.
A Polystepha pilulae larva in Harford Co., Maryland (10/14/2021). Verified by Yann Kemper/iNaturalist.
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Media by
Dave Webb.
Polystepha pilulae in Montgomery Co., Maryland (8/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Media by
Katja Schulz via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (8/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Media by
Katja Schulz via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (9/26/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (8/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (10/2/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (6/23/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (7/6/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Harford Co., Maryland (8/16/2022). (c) kidneymoth, some rights reserved (CC BY-NC).
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kidneymoth via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (7/6/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Anne Arundel Co., Maryland (9/16/2021). (c) Timothy Reichard, all rights reserved.
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Timothy Reichard.
Polystepha pilulae in Prince George's Co., Maryland (7/16/2022). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Prince George's Co., Maryland (8/11/2022). (c) Benjamin Burgunder, some rights reserved (CC BY).
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Benjamin Burgunder via iNaturalist.
Polystepha pilulae in Garrett Co., Maryland (7/13/2023). (c) Mark Etheridge, some rights reserved (CC BY-NC).
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Mark Etheridge.
Polystepha pilulae in Montgomery Co., Maryland (6/13/2023). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Garrett Co., Maryland (Date obscured). (c) Brady O'Brien, some rights reserved (CC BY-NC).
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brady_obrien via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (7/6/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (7/6/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (8/4/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Anne Arundel Co., Maryland (6/26/2022). (c) Wayne Longbottom, some rights reserved (CC BY-NC).
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Wayne Longbottom.
Polystepha pilulae in Anne Arundel Co., Maryland (8/17/2022). (c) Timothy Reichard, all rights reserved.
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Timothy Reichard.
Polystepha pilulae in Queen Anne's Co., Maryland (9/6/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
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Jim Brighton.
Polystepha pilulae in Montgomery Co., Maryland (8/4/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Queen Anne's Co., Maryland (9/6/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
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Jim Brighton.
Polystepha pilulae in Montgomery Co., Maryland (6/26/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Queen Anne's Co., Maryland (9/6/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
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Jim Brighton.
Polystepha pilulae in Anne Arundel Co., Maryland (9/20/2021). (c) Timothy Reichard, all rights reserved.
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Timothy Reichard.
Polystepha pilulae in Allegany Co., Maryland (6/19/2022). (c) Anne DeNovo, some rights reserved (CC BY-NC).
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Anne DeNovo via iNaturalist.
Polystepha pilulae in Anne Arundel Co., Maryland (8/17/2022). (c) Timothy Reichard, all rights reserved.
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Media by
Timothy Reichard.
Polystepha pilulae in Queen Anne's Co., Maryland (9/6/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).
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Jim Brighton.
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (9/27/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Harford Co., Maryland (8/16/2022). (c) kidneymoth, some rights reserved (CC BY-NC).
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kidneymoth via iNaturalist.
Polystepha pilulae in Baltimore Co., Maryland (9/21/2022). (c) Zachary Wimberly, some rights reserved (CC BY).
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Zachary Wimberly via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (9/29/2022). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (11/9/2021). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Anne Arundel Co., Maryland (9/20/2021). (c) Timothy Reichard, all rights reserved.
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Timothy Reichard.
Polystepha pilulae in Anne Arundel Co., Maryland (6/24/2022). (c) Matthew Beziat, some rights reserved (CC BY-NC).
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Matthew Beziat.
Polystepha pilulae in Calvert Co., Maryland (10/4/2022). (c) Matthew Beziat, some rights reserved (CC BY-NC).
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Media by
Matthew Beziat.
Polystepha pilulae in Anne Arundel Co., Maryland (6/24/2022). (c) Matthew Beziat, some rights reserved (CC BY-NC).
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Media by
Matthew Beziat.
Polystepha pilulae in Montgomery Co., Maryland (9/29/2022). (c) Emily Summerbell, some rights reserved (CC BY).
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Emily Summerbell, Ph.D. via iNaturalist.
Polystepha pilulae in Anne Arundel Co., Maryland (9/11/2021). (c) Timothy Reichard, all rights reserved.
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Timothy Reichard.
Polystepha pilulae in Montgomery Co., Maryland (8/4/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Montgomery Co., Maryland (10/12/2021). (c) Katja Schulz, some rights reserved (CC BY).
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Katja Schulz via iNaturalist.
Polystepha pilulae in Anne Arundel Co., Maryland (7/15/2021). (c) Matthew Beziat, some rights reserved (CC BY-NC).
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Media by
Matthew Beziat.
Polystepha pilulae in Anne Arundel Co., Maryland (9/11/2021). (c) Timothy Reichard, all rights reserved.
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Source: Wikipedia
| Polystepha pilulae | |
|---|---|
| |
| Polystepha pilulae galls on Quercus rubra | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Cecidomyiidae |
| Genus: | Polystepha |
| Species: | P. pilulae
|
| Binomial name | |
| Polystepha pilulae (Beutenmüller, 1892)
| |
| Synonyms[1] | |
| |
Polystepha pilulae, the oak leaf gall midge, is a species of gall midge in the family Cecidomyiidae.[1][2][3] It is found in eastern North America.[4]
Description of the gall
[edit]The larvae of this species of midge form circular galls that can be flat or convex. These form on the upper surface of oak leaves of the red oak group (Quercus sect. Lobatae), between the veins. The galls are thick-walled and reddish-brown in colour.[5] They are 3 to 4 mm in diameter.[6]
-
closeup view of galls
References
[edit]- ^ a b "Polystepha pilulae Report". Integrated Taxonomic Information System. Retrieved 2018-05-06.
- ^ "Polystepha pilulae species details". Catalogue of Life. Retrieved 2018-05-06.
- ^ "Polystepha pilulae". GBIF. Retrieved 2018-05-06.
- ^ "Polystepha pilulae Species Information". BugGuide.net. Retrieved 2018-05-06.
- ^ Gagné, Raymond J. (1989). The plant-feeding gall midges of North America. Ithaca, N.Y.: Comstock Publishing Associates.
- ^ Felt, EP (1910). "Gall midges of Aster, Carya, Quercus, and Salix". Journal of Economic Entomology. 3 (4): 347–356. doi:10.1093/jee/3.4.347.
Further reading
[edit]- Gagné, Raymond J.; Jaschhof, Mathias (2017). A Catalog of the Cecidomyiidae (Diptera) of the World, Fourth Edition (PDF). Agricultural Research Service, US Department of Agriculture.
- Gagné, Raymond J.; Jaschhof, Mathias (2014). A Catalog of the Cecidomyiidae (Diptera) of the World (PDF) (Report). Systematic Entomology Laboratory, USDA.
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