Vol. 63, 2024

(update: 2024.12.19)

Jumping Plant Lice of the Genus Petalolyma Scott (Hemiptera, Triozidae) inducing Galls on Ilex Species (Aquifoliaceae) in Taiwan with Comments on Torulus Li

Yi-Chang Liao^1,2,3,*, Daniel Burckhardt⁴, and Man-Miao Yang^3,*

¹Department of Entomology, University of California, Riverside, USA. *Correspondence: E-mail: ycliaopsyllids@gmail.com (Liao)
²Back to the Wild Insect Ecosurvey CO., LTD., Taichung, Taiwan
³Department of Entomology, National Chung Hsing University, 145 Xingda Rd., Taichung 402, Taiwan. *Correspondence: E-mail: mmy.letsgall@gmail.com (Yang)
⁴Naturhistorisches Museum, Augustinergasse 2, 4001 Basel, Switzerland. E-mail: daniel.burckhardt@bs.ch (Burckhardt)

(Received 16 December 2023 / Accepted 26 June 2024 / Published -- 2024)
Communicated by Shen-Horn Yen

The triozid genus Petalolyma Scott, 1882 is reviewed, and the monotypic genus Torulus Li, 1991, syn. nov., is considered a junior subjective synonym. Torulus sinicus is transferred to Petalolyma as P. sinica (Li, 1991), comb. nov., producing a secondary homonym of P. sinica Yang & Li, 1984, for which the replacement name Petalolyma lii Liao & Burckhardt, nomen nov. is proposed here. Adults and fifth instar immatures of Petalolyma vittata Liao & Burckhardt, sp. nov. are described and illustrated. The new species induces marginal fold galls on leaves of Ilex ficoidea (Aquifoliaceae). The previously unknown male and female of P. lii and P. nigra, respectively, are described and illustrated, and Petalolyma castanopsis Li & Yang, 1991 and P. fujianensis Li & Yang, 1999, syn. nov., are synonymised. Petalolyma hyalina (Kuwayama, 1910) is considered a nomen dubium as the original description is not diagnostic and the type material cannot be found. Hence, Petalolyma currently includes 13 valid species whose host plant and biogeographic patterns are briefly discussed. Identification keys for the adults and fifth instar immatures are provided for the Taiwanese species.

Key words: Sternorrhyncha, Psylloidea, New species, New synonymies, Taxonomy, Marginal fold gall

Citation: Liao YC, Burckhardt D, Yang MM. 2024. Jumping plant lice of the genus Petalolyma Scott (Hemiptera, Triozidae) inducing galls on Ilex species (Aquifoliaceae) in Taiwan with comments on Torulus Li. Zool Stud 63:28. doi:10.6620/ZS.2024.63-28.