6 urn:lsid:arphahub.com:pub:DE333E49-E4EE-5693-9BEF-D446E6301C98 urn:lsid:zoobank.org:pub:55528528-5C97-4D79-A718-8B3D153B37CC Journal of Hymenoptera Research JHR 1070-9428 1314-2607 Pensoft Publishers 10.3897/JHR.46.5155 5155 Research Article Aphelinidae Taxonomy China Taiwan A new species of Encarsia (Hymenoptera, Aphelinidae) developing on ficus whitefly Singhiella simplex (Hemiptera, Aleyrodidae) in China and Taiwan Ko Chiun Cheng 1 Shih Yuan Tung 1 Schmidt Stefan schmidt.s@snsb.de https://orcid.org/0000-0001-5751-8706 2 Polaszek Andrew https://orcid.org/0000-0002-7171-3353 3 Department of Entomology, National Taiwan University, Taipei 106, Taiwan National Taiwan University Taipei Taiwan SNSB-Zoologische Staatssammlung München, Münchhausenstr. 21, 81247 Munich, Germany Zoologische Staatssammlung Munich Germany Department of Life Sciences, the Natural History Museum, London SW7 5BD, UK Natural History Museum London United Kingdom

Corresponding author: Stefan Schmidt (hymenoptera@zsm.mwn.de)

Academic editor: H. Baur

 2015 30 11 2015 46 85 90 DD72D402-FFD6-FFEE-FF8F-FFB2FFFC4479 C5ABD120-99B0-4BE2-BFFE-B67CA5B1AF80 575075 22 04 2015 09 08 2015 Chiun Cheng Ko, Yuan Tung Shih, Stefan Schmidt, Andrew Polaszek This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. http://zoobank.org/C5ABD120-99B0-4BE2-BFFE-B67CA5B1AF80

Encarsia singhiellae Polaszek & Shih, sp. n., is described and illustrated. It is known so far from Taiwanand China. All specimens were reared from the ficus, or fig, whitefly Singhiella simplex (Singh), an Asian species recently attaining pest status in California, Colombia, and Florida.

 Parasitoid invasive species potential biocontrol agent Citation

Cheng Ko C, Shih YT, Schmidt S, Polaszek A (2015) A new species of Encarsia (Hymenoptera, Aphelinidae) developing on ficus whitefly Singhiella simplex (Hemiptera, Aleyrodidae) in China and Taiwan. Journal of Hymenoptera Research 46: 85–90. doi: 10.3897/JHR.46.5155

 Introduction

The ficus or fig whitefly Singhiella simplex was described from India (Singh 1931), and appears to have a natural distribution across South and Southeast Asia that includes China, India, Myanmar and Taiwan (EPPO 2014, Natural History Museum, London, unpublished data). It was first recorded as an invasive species established in Florida (2007) and California (2012), has since become widespread in Central and South America and the Caribbean, and was recorded from Cyprus in 2014. It appears to be restricted to developing on several Ficus species, and is commonly recorded from F. benjamina L. and F. microcarpa L.f. Some Ficus species appear to be unsuitable for its development (EPPO 2014).

There are three published records of parasitoids of this species, all apparently from Florida. Hodges (2007), recording S. simplex for the first time from Florida, cited Encarsia tricolor Förster, 1878 a species that occurs nowhere in the New World, nor anywhere within the natural Old World distribution of S. simplex. We therefore consider this parasitoid record to be a misidentification. Encarsia protransvena Viggiani, 1985, and Amitus bennetti Viggiani & Evans, 1992 were recorded from S. simplex in Florida (Avery et al. 2011) and, although no identification authority was cited, these seem to have been identified correctly. Given the origin of S. simplex in the Old World tropics, it seems likely that a native parasitoid, screened for a reasonable degree of host-specificity, might be a good candidate for classical biological control of S. simplex in the New World. Such a possible candidate is described below. Terminology follows Huang and Polaszek (1998).

Abbreviations

FAFU

Fujian Agriculture and Forestry University, Fuzhou, CHINA

.

NHM

Natural History Museum, London, UK

.

NTU

National Taiwan University, Taipei, TAIWAN

.

 Material and methods

A single series of reared specimens collected in September 2010 by the second author (YTS) was studied in detail for taxonomically useful morphological characters by the second and fourth (AP) authors. A single specimen reared one month later from the same host from mainland China proved to be morphologically identical. DNA was successfully sequenced from four individuals from the original sample, using the protocol described in detail by Polaszek et al. (2013). This “non-destructive” extraction method has proven extremely effective for the smallest parasitoids. Sequence data for the ribosomal 28S-D2 region were aligned using MUSCLE (Edgar 2004) and analysed using RAxML (Stamatakis 2014) by the third author.

 Results Animalia Hymenoptera Aphelinidae F42DF969-5D35-5977-8537-5D0DD59BE87C Encarsia singhiellae http://zoobank.org/3E0E06D7-3280-44E4-B2C3-56BED3E54000 Shih & Polaszek sp. n. Figs 1–9 , 10–15 Description of female.

Colour: Head yellow, antenna yellow, slightly darker towards apex. Mesosoma yellow except following light brown: pronotum, posterior margin of mesoscutum, anterior margin of scutellum, axillae and sides of propodeum. Metasoma yellow except T5 dark brown in strong contrast. Base of T1, and T4, infuscate centrally. Fore wing slightly infuscate below marginal vein. Legs yellow.

Morphology: Mandibles each with three small teeth. Stemmaticum with five robust setae and reticulate surface sculpture. Antennal formula 1,1,4,2. F1, F2, F3 approximately equal in length, with any of the three antennomeres the longest in different specimens. Pedicel with two robust setae dorsally. F4 0.9 times F1 (0.85 in holotype); F5 0.7–0.9× F1 (0.73 in HT); F6 0.8–1.0times F1 (0.9 in HT); funicle length 2.5times clava length (2.3 in HT). F1–F6 with the following numbers of multiporous plate sensilla: F1:0; F2:2; F3:2; F4:3; F5:3 F6:3. Mid lobe of mesoscutum with 4 or 5 pairs of setae, 1 lateral pair and 3–4 centrally (one central seta unpaired in holotype); side lobes with three setae. Scutellar sensilla closely placed, separated by less than the maximum width of one sensillum. Distance between posterior pair of scutellar setae 2 times distance between posterior pair (2.1 times in HT). Fore wing 2.8 times maximum width of disc (2.84 in HT). Marginal fringe 0.26 times maximum width of disc (0.25 in HT). Submarginal vein with 3 setae; marginal vein anteriorly with 7–9 setae (8+9 in HT). Basal cell with 9–15 setae (11+12 in HT). Tarsal formula 5-5-5. Mid tibial spur 0.56 times corresponding basitarsus. Mid tibia with a prominent spine-like seta apically. Metasomal tergites with the following numbers of setae: T1: 0, T2: 2, T3: 2, T4: 2, T5: 4, T6: 4, T7: 4. Ovipositor 1.2 times mid tibia; 2nd valvifers 3.8 times third valvulae (3.7 in HT).

10.3897/JHR.46.5155.figures1-9 965376 7122D188-01DE-516F-AD6D-15F09BF1688A

E. singhiellae sp. n.: 1 Head, frontal view 2 Head, back view 3 Fore leg 4 Mid leg 5 Hind leg 6 Dorsal mesosoma 7 Dorsal metasoma 8 Antenna 9 Fore wing.

https://binary.pensoft.net/fig/66925 10.3897/JHR.46.5155.figures10-15 965378 47B90A3A-4F4D-576E-87D9-45702168FA09

E. singhiellae sp. n.: 10 Apex of antenna 11 Detail of compound eye 12 Articulation of tibia and femur, fore leg 13 Ventral habitus 14 Mouth 15 Articulation of tibia and femur, mid leg.

https://binary.pensoft.net/fig/66926 Male.

Unknown.

 Material examined.

Holotype female (NHM) on slide, labelled “TAIWAN: Taoyuan, Kuanyin (25.034°N, 121.113°E), 07 July 2011, ex Singhiella simplex on Ficus microcarpa Y.T. Shih col. Holotype Encarsia singhiellae Shih & Polaszek”; paratypes: 9 females, same data as holotype (NHM, NTU). CHINA: Fujian, Xiamen (24.481°N, 118.089°E), 6.x.2010 ex Singhiella simplex on Ficus microcarpa, J Huang, A Polaszek, Z-H Wang col. (1 female, FAFU).

 Species group placement.

The close proximity of the scutellar sensilla, coupled with three setae on the submarginal vein might suggest placement of the new species in the E. strenua group, but the shape of the stigma vein indicates that this placement would be incorrect. E. strenua group species have a distinct constriction between the marginal and stigmal veins. DNA analysis of the 28S D2 region places E. singhiellae sp. n. far away from the monophyletic E. strenua group, in an assemblage that includes E. tricolor Foerster, E. tachii (Polaszek & Hayat), and E. mineoi Viggiani (S. Schmidt, unpublished data). Encarsia singhiellae is therefore currently unplaced with respect to any known species group of Encarsia. The sequence has been deposited in GenBank under accession number KT279403.

In the key to Chinese Encarsia species (Huang and Polaszek 1998), E. singhiellae sp. n. keys to E. noyesana Huang & Polaszek, 1998. It can be easily distinguished from that species by the three setae on the submarginal vein (two in E. noyesana); 2-segmented clava (3-segmented in E. noyesana); and the distinct colour pattern of the metasoma.

 Host.

Singhiella simplex (Singh) (Hemiptera: Aleyrodidae).

 Remarks.

Encarsia singhiellae sp. n. is not closely related to any known Encarsia species, either in the Oriental Region or elsewhere. It has several unusual characters as follows: antenna with two robust setae on the pedicel, and F1 having distinct sculpture; anterior apex of mid tibia with one distinct long spine-like seta. The following character states place the new species in the genus Encarsia: fore and hind tarsi five-segmented, eight antennomeres (excluding radicle), scutellum with two pairs of setae, marginal vein longer than submarginal vein, stigmal vein very short and postmarginal vein absent.

It is the first recorded parasitoid of Singhiella simplex in Asia, and appears to show a high degree of host specificity, as there are no host records from other whitefly species. The species is currently only known from the type locality.

 Acknowledgements

This study was funded by the Taiwan Ministry of Science and Technology (Project No. 102-2628-B-002-019-MY3 to CCK and YTS). Field work in China by AP was facilitated by a grant from the Chinese Academy of Sciences to Prof Huang Jian, Fujian Agricultural and Forestry University. We are grateful to the following for useful comments on earlier versions of the MS: John Heraty, John Huber, John Noyes, JimWoolley.

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