''Trioza centranthi'' is a sap-sucking hemipteran bug in the family
Triozidae
Triozidae is one of seven families collectively referred to as jumping plant lice. They have traditionally been considered part of a single family, Psyllidae, but recent classifications divide the group into a total of seven families; most of th ...
which creates
gall
Galls (from the Latin , 'oak-apple') or ''cecidia'' (from the Greek , anything gushing out) are a kind of swelling growth on the external Tissue (biology), tissues of plants, fungi, or animals. Plant galls are abnormal outgrowths of plant tissu ...
s on the leaves and flowers of ''
Centranthus
''Centranthus'' is a flowering plant genus comprising herbs and subshrubs native to Southern Europe. It is in the family Caprifoliaceae. There are about twelve species in the genus. Some ''Centranthus'' are known as introduced species in other pa ...
'' and ''
Valerianella
''Valerianella'' is a genus of plant in family Caprifoliaceae. Many plants of this genus are known by the common name corn salad or cornsalad, although that name most often refers to '' Valerianella locusta''.
Accepted species: It was first described by Jean Nicolas Vallot, a French
entomologist
Entomology () is the scientific study of insects, a branch of zoology. In the past the term "insect" was less specific, and historically the definition of entomology would also include the study of animals in other arthropod groups, such as arach ...
in 1829 and is found in Europe.
Description of the gall
The leaf at the tip of the shoot is broader than normal and the edges of the leaf are swollen and turned upwards. The flowers can also be affected and are a tangled leafy mass ( phyllanthy). Plants galled include '' Centranthus angustifolius'', '' C. calcitrapa'', red valerian ('' C. ruber''), '' Fedia cornucopiae'', ''
Valerianella carinata
''Valerianella'' is a genus of plant in family Caprifoliaceae. Many plants of this genus are known by the common name corn salad or cornsalad, although that name most often refers to '' Valerianella locusta''.
Accepted species:V. coronata'', '' V. dentata'', common cornsalad ('' V. locusta'') and '' V. rimosa''.
Distribution
''Trioza centranthi'' is found in Europe from Great Britain and France in the west to the
Ukraine
Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian invas ...