There are thought to be 51 species of Stromboceros globally, mostly distributed in the neotropics. In Britain and Ireland they are represented by one species.
The Stromboceros are slender sawflies. The antennae are filiform and at least as long as twice the width of the head behind the eyes. The antennal pedicel is longer than broad. The frontal area of the head is rimmed by a raised carina. The prepectus is present and in the same plane as the mesepisternum from which it is separated by a suture. In the forewing the costal vein is slightly swollen apically and at that point it is significantly less than half the width of the stigma. There is no cross vein in the forewing anal cell. In the hindwing the anal cell has a petiole that is shorter than the width of the cell. On the hind legs the first tarsomere is longer than the three following tarsomeres combined. On the fore leg the inner tibial spur is flattened and divided at the apex.
Larvae feed on the fronds of ferns.
Stromboceros delicatulus (Fallén, 1808)
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