Triozidus eleutherococci ( Konovalova, 1980 ), 2025

Liao, Yi-Chang, Inoue, Hiromitsu & Percy, Diana M., 2025, The psyllid genus Triozidus Li, 1994 stat. rev. sensu novo (Hemiptera: Psylloidea: Triozidae) in East Asia is redefined with the addition of two new species from Taiwan inducing galls on the leaflet petiolules of Eleutherococcus trifoliatus (Araliaceae), Zootaxa 5727 (1), pp. 113-139 : 121

Triozidus eleutherococci ( Konovalova, 1980) comb. nov.

Trioza eleutherococci Konovalova, 1980: 21 .

Material examined. None.

Description. Adult male and female in Konovalova (1980), with additional information in the key in Konovalova (1988).

Host plant. Given as Eleutherococcus senticosus in Konovalova (1980) but no mention of galls.

Distribution. Russia ( Primorsky Krai, Russian Far East) ( Konovalova 1980, 1988).

Comment. This species, like T. burckhardti , lacks the medial projections on the distal aedeagus segment. The paramere shape is diagnostic with the apex extended rearward more so than in other Triozidus ( Fig. 16 ). Other distinguishing characters that also suggest this species may be most closely related to T. burckhardti are small size (overall body size less than 4.5 mm, forewing length less than 3.5 mm) ( Fig. 16 ), relatively narrow forewing, and genal cones that are short and acute ( Konovalova 1980, 1988).

Figures

FIGURE 16. Phylogenetic placement of Triozidus in family Triozidae is indicated by a black square representing a subgroup within Group B (see Percy et al. 2018), the related genera are expanded on in the text. An asterix indicates the placement of the type species of Heterotrioza, H. chenopodii in Group D, and Trioza, T. urticae in Group M, and Dyspersa sensu Cho et al. (2022) in Group A. Configuration of the three Triozidus taxa to one another based on the 714 bp COI fragment data (unique haplotypes only) is shown, with T. burckhardti placement indicated based on the backbone analysis (see text); taxon placements within Triozidus are uncertain in both analyses due to short internal branches and low to moderate bootstrap support, with a slightly different taxon configuration recovered in the ML backbone constraint analysis (see text). Illustrations of forewing, paramere and aedeagus are shown for all six Triozidus species to indicate comparative sizes; an asterisk by T. ceratophorus and T. eleutherococci indicates the illustrations are redrawn with reference to Li (2011) and Konovalova (1980, 1988) respectively, and in these cases paramere and aedeagus may not be to scale, plus the apex of the aedeagus is partly obscured in the illustration for T. eleutherococci. The annotation of the mitogenome of T. yangorum is graphically represented at top right.