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DOI:10.6662/TESFE.2018022 台灣昆蟲專刊 Formosan Entomol. 38. Special Issue. 88-92 Book Review Formosan Entomologist Journal Homepage: entsocjournal.yabee.com.tw Let’s Gall Taiwan: A Guidebook on Insect Galls edited by Gene-Sheng Tung and Man-Miao Yang, Published by the Council of Agriculture (Forestry Bureau), and the Taiwan Entomological Society, Taipei, 248 pages, 2018. ISBN: 978-986-05-5346-8 (Hard cover). Price: NTD 46000 Ananatanarayanan Raman Charles Sturt University & Graham Centre for Agricultural Innovation; PO Box 883, Orange, NSW 2800, Australia * Corresponding email: [email protected]; [email protected] Received: 19 November 2018 Available online: 3 June 2019 Taiwan, a 36000 km2 island‒country, occurs endemic ‒ more than 60% of the described plant- off the coast of south-east Asia, bordered by feeding arthropods of Taiwan are endemic as Fujian Province of the People’s Republic of China well (Shao et al., 2003). In such a context of a in the west, South Korea and the Fukuoka fascinating natural landscape and complex Prefecture of Japan in the north, Luzon Province biological diversity, Gene-Sheng Tung and Man- of the Philippines in the south, and the Miao Yang have catalogued several arthropod- Philippine Sea in the east. Historically a shallow induced galls of Taiwan in this c. 250 page shelf of the Taiwan Strait connected the islandic colourful and elegant book. Taiwan and China. During the interglacial Galls are plant excrescences induced by the periods of the Pleistocene glacial cycles, this action of specific groups of Insecta and Acarina, shelf submerged separating China and Taiwan. which manifest as neoformed structures. Insect- Repeating topographic changes during the post- induced galls are beautiful objects sculpted by Pleistocene glacial cycles enabled the Nature. We require a character ‒ a special one ‒ colonization of organisms between China and to admire the beauty of these natural sculptures. Taiwan (Chiang and Schaal, 2006). Yet c. 25% of American photographer Wilson ‘Snowflake’ Taiwanese plants are native to this land plate, Bentley’s (1835~1931, Jericho, Vermont) words, which have evolved there because of (i) continent-island colonization, (ii) in-situ ‘Their (snowflakes) uniqueness is part of radiation, and (iii) synergy between colonization their fascination and romance, yet there is and radiation. Additionally, the Tropic of Cancer undoubtedly something similar about them; divides Taiwan into a southern tropical and a they share a ‘six-ness’. Which is more northern subtropical regions. Thus Taiwan’s interesting? Perhaps it depends on the unique geography, over the years, has enabled character of the observer.’ the natural build-up of a delightful biological diversity across this island‒nation. Additionally in Appletons’ Popular Science Monthly (1898) the subtropical climate has contributed to the ring in my ears as I write this section. varied demographics of Taiwanese plants and Arthropod-induced plant galls are in no animals (Wu et al., 2006). Because of the high way different from what Bentley speaks about diversity of Taiwanese plants ‒ most of which are snowflakes. The plant galls are stunning and ~88~ 台灣昆蟲專刊 Formosan Entomol. 38. Special Issue. 88-92 beautiful, yet each gall type induced by an Ting Yeh, Chuan-Chan Wang, and Meng-Yuan arthropod species is unique in space. Huang, further to the editors, Gene-Sheng Tung Arthropod-induced galls brilliantly bear and Man-Miao Yang. Chien-Chun Hsiao, witness to Gerald Holton’s Ionian enchantment translator, has generally done a good job in to me, because of their admirable orderliness in rendering English texts, although certain parts chaos in their form. I feel a delicate sense of could have been done better. This book’s key Ionian enchantment, when I think of the purpose is to empower amateur biologists, who spherical galls induced by Eurosta solidaginis would be looking for arthropod-induced galls and (Diptera: Tephritidae) on the stems of Solidago the inducing arthropods in Taiwan. My altissima (Asteraceae) in North America and commentary offered in the following paragraphs the sea-urchin galls induced by Mangalorea will refer only to the English sections of this book, hopeae (Hemiptera: Beesoniidae) on the stems since I am illiterate with Chinese characters. of Hopea ponga (Dipterocarpaceae) in southern First, on the overall quality and get-up of India. The gross shape of any arthropod- the book. This hard-cover book, elegantly Bradel induced gall, I am confident, will strike a bound, includes thick-gauge, high-quality A4- pleasing chord in the minds of those, who look size pages. The spine bears a neat imprint of the for and study these plant abnormalities. In book name in English and Chinese characters, northern Taiwan, galls of stunning shapes and along with the names of editors and publisher. structures arise on the foliage and stems of The front cover is spectacular with attractive Machilus thunbergii (Lauraceae) because of the water colours of the European red-pea galls on action of Daphnephila taiwanensis, D. sueyenae, Quercus leaves (Fagaceae) and the inducing D. stenocalia, D. ornithocephala, and D. Cynips (Hymenoptera) extracted from the truncicola (Diptera: Cecidomyiidae) (Tokuda et Alternating Generations: A Biological Study of al., 2008). The other impressive element in the Oak Galls and Gall Flies by Hermann Adler ecology of gall-inducing arthropods is that they (translated from German by Charles Straton, are generally fussy and choosy of host plants. 1894, Clarendon Press, London, 198 pages). The They display a strong level of commitment, back cover includes beautiful water-colour which I prefer to describe as ‘fidelity’ to specific illustrations depicting the developmental plants. In this context, gall-inducing Insecta sequence of the architecturally complex, urn- and Acarina can be seen as highly reliable plant shaped Taiwanese gall arising on the leaves of taxonomists. As a rule of thumb, experienced Machilus zuihoensis (Lauraceae) induced by scientists working on galls and gall-inducing Daphnephila urnicola (Diptera: Cecidomyiidae). arthropods can easily determine the plant by Several superbly executed water-colour and looking at the inducing organism and the gall, crayon sketches decorate different pages. The and determine the inducing organism by India-ink artworks in pages 24~25 referring to looking at the plant and the gall. the rollings induced by Coleoptera on Bischofia Several amateur biologists and hobby javanica (Phyllanthaceae) and Rhus chinensis natural historians passionately pursue these (Anacardiaceae) are superb. I will applaud the curious natural sculptures, similar to others artists, Chu-Yu Quo and Li-Li Tseng, who have interested in snakes and other reptiles, birds, provided scientifically accurate artworks that butterflies, mushrooms, and ferns. Consequently creatively and aesthetically supplement the many handbooks and plain-English guidebooks efforts of Gene-Sheng and Man-Miao. on plant galls have appeared through the world: Chapters 1~3 (pages 8~72) provide notes on e.g., Michael Chinery’s British Plant Galls: A the general context of arthropod-induced plant Photographic Guide, Ronald Russo’s Field Guide galls, their evolutionary and ecological to Plant Galls of California and Other Western significance, how the inducing arthropods States, and Rosalind Blanche’s Life in a Gall. behave during gall induction, and how galls have The Let’s Gall Taiwan is one of that kind. This been used by humans, as in dyeing and medicine, book, includes chapters contributed by Sheng- over millennia, in easily-readable prose. Chapter Feng Lin, Chang-Ti Tang, Yi-Chang Liao, Hsin- 2.5, ‘Coloration of galls’, explains the mechanism ~89~ 台灣昆蟲專刊 Formosan Entomol. 38. Special Issue. 88-92 of hyper- and hypo-pigmentation that develop in Taiwanese hemipteran gall-inducing taxa from galls. We need to recall here that the physiology the Homotomidae, Aphididae, Adelgidae, of insect-induced galls is broadly similar to the Triozidae, Phacopteronidae, and Tingidae, and physiology of normally developing fruits, six taxa from the less-known gall-inducing although the proportions of production, groups, viz., Gracillaridae, Sesiidae transport, and storage (and utilization by the (Lepidoptera), Phlaeothripidae (Thysanoptera), inhabiting larva) of various primary and and Curculionidae (Coleoptera) are also included. secondary metabolites, of course, would vary Details of all of these taxa are presented in a with the species involved. Photosynthesis, for consistent style with brief notes in both Chinese instance, is intensely altered in gall systems, but and English characters, supported by high- the sugar transport from other parts of the same quality images of galls and the inducing taxa, plant that bear no galls occurs via both symplast each taxon neatly accommodated within a page. and apoplast. Dehiscence of galls and dehiscence Occasional supplementary photographs add of fruits display similar physiological processes. value. Overall, this chapter, more-than In both systems, normally dehiscing fruits and adequately, fulfils the primary purpose of this dehiscing galls include newly differentiated volume by supplying images and notes that specialized cells and a tight coordination of would substantially help an amateur gall molecular and biochemical events that would enthusiast. lead to cell separation freeing seeds in fruits and Two galls, one induced by Bruggmaniella sp. the larva (or adult in some instances) in galls, (Diptera: Cecidomyiidae)