Seq # 185410015

Phyllocnistis extrematrix Martynova, 1955 Species

Last modified: Dec. 12, 2023, 4:17 p.m.

Discovered in Belgium only in 2018. This species was described from Kazakhstan, but during recent years, it might have spread towards W Europe (in 2014 it was recorded from the Czech Republic, France, Portugal, Slovakia and Spain, and in 2017 it was recorded from Germany), but another possibility is that it has always been overlooked because of its resemblance with Ph. unipunctella.


Family: Gracillariidae > Subfamily: Phyllocnistinae > Genus: Phyllocnistis > Species: Phyllocnistis extrematrix
Vernacular names
Peppeltwijgmineermot (NL)
First mention in Belgium
Steeman C. & Sierens T. 2019. Interessante waarnemingen van Lepidoptera in België in 2018 — Phegea 47(2): 53–63. On page 58 (as Phyllocnistis extrematrix Martynova, 1955). view page




Cannot be distinguished with certainty from Ph. unipunctella which lives on the same hostplant, therefore examination of the genitalia is necessary.

Museum specimens

No pictures yet!

Specimens in nature



A long, serpentine gallery in the bark of young shoots, through the petiole, entering the leaf in the last instar stage and continuing its mine along the leaf margin.


Not a real cocoon, just a flimsy spinning.


The egg is oviposited on a young shoot of the host plant.
The last instar enters a leaf via the petiole and folds a leaf margin downwards with spinning. Pupation under that folded leaf in a flimsy spinning.
The species probably hibernates in the adult stage.

No pictures yet!

Flight periods

Not known with certainty, but probably two generations a year: June–July and October–November.

Observed on

Host plant (species):
Populus nigra, Populus × canadensis, Populus balsamifera and Populus nigra var. italica
Host plant (genera):

The species lives on Populus trees. It has been described from Kazakhstan where it lived on Populus suaveolens. In W Europe it has been recorded on Populus nigra and its var. italica, but also on the related species P. x canadensis and P. balsamifera.

No pictures yet!