This species has not been studied by the present authors. It was described as having reticulate sculpture, apparently similar to that of A. nodicornis, but with two pairs of well-developed setae on the prothoracic epimera of which the inner pair is about half as long as the outer pair.
The genus Acanthothrips includes 13 species, of which one is Holarctic, one is from northern Europe, five are known only from North America, and six are from the Neotropics including Mexico. Priesner (1964) distinguished this genus from the wordwide genus Hoplandrothrips on the basis that the fore wings are parallel sided. Although this is true of A. nodicornis, the fore wings of A. albivittatus and A. argentifer are constricted medially at least as much as in some species of Hoplandrothrips. The antennae of A. albivittatus are uniformly dark, whereas the median antennal segments are largely yellow in the other two species recorded from California. Specimens of A. argentifer have not been studied, but this was described as being reticulate like A. nodicornis, although in contrast to that species the females were described as having the fore tarsus "with a very small tooth".
Acanthothrips argentifer (Cott)
Breeding on dead branches
Unidentified fungal hyphae on dead branches of willow (Salix).
Presumably North America