A gall from the wasp Andricus quercusstrobilanus in Howard Co., Maryland (9/6/2014).
Andricus quercusstrobilanus in Howard Co., Maryland (9/28/2019). (c) Ashley M Bradford, some rights reserved (CC BY-NC ).
A gall of the wasp Andricus quercusstrobilanus in Baltimore Co., Maryland (9/14/2015).
Andricus quercusstrobilanus in Howard Co., Maryland (9/7/2020). (c) Matthew Beziat, some rights reserved (CC BY-NC ).
A gall of the wasp Andricus quercusstrobilanus in Prince George's Co., Maryland (8/30/2015).
Andricus quercusstrobilanus in Kent Co., Maryland (12/31/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Charles Co., Maryland (8/26/2019). (c) Tim Emhoff, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Charles Co., Maryland (8/26/2019). (c) Tim Emhoff, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Caroline Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Prince George's Co., Maryland (3/16/2013). (c) botanygirl, some rights reserved (CC BY ).
Andricus quercusstrobilanus in Prince George's Co., Maryland (3/16/2013). (c) botanygirl, some rights reserved (CC BY ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (9/3/2019). (c) crslocum, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (9/18/2022). (c) Emily Summerbell, some rights reserved (CC BY ).
Andricus quercusstrobilanus in Baltimore Co., Maryland (8/8/2023). (c) mrsrosiebacon, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Prince George's Co., Maryland (10/1/2022). (c) Matthew Beziat, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (9/7/2013). (c) martin livezey, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (9/7/2013). (c) martin livezey, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Caroline Co., Maryland (2/12/2022). (c) Jim Brighton, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Caroline Co., Maryland (10/16/2023). (c) Wayne Longbottom, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Anne Arundel Co., Maryland (9/21/2024). (c) kwixted0, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Caroline Co., Maryland (10/16/2023). (c) Wayne Longbottom, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (CC BY ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (2/11/2022). (c) Deborah Barber, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (CC BY ).
Andricus quercusstrobilanus in Caroline Co., Maryland (10/16/2023). (c) Wayne Longbottom, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Prince George's Co., Maryland (8/27/2024). (c) Anne DeNovo, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Queen Anne's Co., Maryland (9/16/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (9/22/2023). (c) Beth Burrous, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (9/30/2020). (c) claremoore, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Howard Co., Maryland (10/7/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Carroll Co., Maryland (11/29/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (4/18/2023). (c) Emily Summerbell, some rights reserved (CC BY ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (4/18/2023). (c) Emily Summerbell, some rights reserved (CC BY ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (4/18/2023). (c) Emily Summerbell, some rights reserved (CC BY ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (4/18/2023). (c) Emily Summerbell, some rights reserved (CC BY ).
Andricus quercusstrobilanus in Montgomery Co., Maryland (4/18/2023). (c) Emily Summerbell, some rights reserved (CC BY ).
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Relationships Creates distinctive hexagonal galls on oak twigs.
Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.
A gall from the wasp
Andricus quercusstrobilanus in Howard Co., Maryland (9/6/2014).
Media by
Richard Orr .
Species of wasp
Andricus quercusstrobilanus , the lobed oak gall wasp , is a species [ 1]
of gall wasp in the family Cynipidae ,
[ 2]
found in North America .
[ 3]
The quercus in its specific name is the genus name for oak , while "strobilus" is derived from the Greek strobilo which means "cone", a reference to the cone shape of the gall ;
[ 4]
thus the gall is sometimes called pine cone oak gall .
[ 5]
Larvae induce a cluster of wedge-shaped galls on white oaks , including bur oak , swamp white oak , and overcup oak .
[ 4]
The galls are irregular, cone-shaped bodies
[ 6]
that are closely packed together, with their pointed bases attached to a common centre.
[ 7]
These wedges are hard and corky and break off very easily when the gall is dry. Each of them contains a hollow kernel with a plump, large larva inside.
[ 8]
The galls undergo color change from pink or red to yellow and finally to brown.
[ 9]
Adults of the species have not been described.
Guest wasps found in the galls include inquilines such as Synergus lignicola (Cynipidae ) and parasitoids such as Eurytoma sp. (Eurytomidae ).[ 6]
Andricus quercusstrobilanus