DCE JHR 57: 115-121 (201 7) Pra JOURNAL OF A peer-reviewed open-access journal doi: |0.3897/jhr.57. 12462 ) Hymenopter a http://jhr.pensoft.net Thelnternaionl Scie of Hymenopexriss, RESEARCH Description of Aphelopus fuscoflavus, a new species of Dryinidae from Thailand (Hymenoptera, Chrysidoidea) Adalgisa Guglielmino', Massimo Olmi’, Alessandro Marletta’, Zai-fu Xu‘ | Department of Agriculture and Forestry Sciences (DAFNE), University of Tuscia, Viterbo, Italy 2. Tropical Entomology Research Center, Viterbo, Italy 3 Department of Biological, Geological and Environmental Sciences, Animal Biology section, University of Catania, Catania, Italy 4 Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, PR. China Corresponding author: Zai-fu Xu (xuzaifu@scau.edu.cn) Academic editor: Michael Ohl | Received 28 February 2017 | Accepted 7 April 2017 | Published 30 June 2017 http://zoobank.org/7F135A17-F735-4A56-9721-99135D774EF5 Citation: Guglielmino A, Olmi M, Marletta A, Xu Z-f (2017) Description of Aphelopus fuscoflavus, a new species of Dryinidae from Thailand (Hymenoptera, Chrysidoidea). Journal of Hymenoptera Research 57: 115-121. https://doi. org/10.3897/jhr.57.12462 Abstract A new species of Aphelopus Dalman is described from Thailand, Sakon Nakhon: A. fuscoflavus sp. n. Mor- phologically the new species is similar to A. zonalis Xu, Olmi & He, 2013, known from China, Hainan, but it is clearly different in having the basivolsella fused with the paramere, while the basivolsella is not fused with the paramere in A. zonalis. Published identification keys to the Oriental species of Aphelopus are modified to include the new species. Keywords Aphelopinae, Aphelopus, new species, Oriental region, key, Thailand Introduction Dryinidae (Hymenoptera, Chrysidoidea) are parasitoids of leathoppers, planthoppers and treehoppers (Hemiptera, Auchenorrhyncha) (Guglielmino and Virla 1998; Gug- lielmino and Biickle 2003, 2010; Guglielmino et al. 2006, 2013, 2015). Aphelopus Dalman, 1823 is a genus that is present in all zoogeographical regions (Olmi 1984; Xu et al. 2013; Olmi and Virla 2014; Olmi and Xu 2015). In total 78 species have been described from all continents (Olmi and Xu 2015) and the genus was revised at Copyright Adalgisa Guglielmino et al. 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. 116 Adalgisa Guglielmino et al. / Journal of Hymenoptera Research 57: 115-121 (2017) world level by Olmi (1984, 1991) and in the Oriental, Neotropical and Eastern Pal- aearctic regions by Xu et al. (2013), Olmi and Virla (2014) and Olmi and Xu (2015), respectively. The species of Aphelopus inhabiting the Oriental region have been recently studied by Xu et al. (2013); they listed 31 species in total. Aphelopus species are parasitoids of leafhoppers belonging to Typhlocybinae (Ci- cadellidae) (Guglielmino et al. 2013). Contrarily to almost all dryinids, females of Ap- helopus do not have chelae and do not feed on their hosts; they grasp the body of their hosts between the two fore legs, with or without the help of their mandibles (Olmi 1984, 1994). In 2016 we examined additional specimens of Aphelopus from Thailand and dis- covered a new species described in this paper. Materials and methods The descriptions follow the terminology used by Olmi (1984) and Xu et al. (2013). The measurements reported are relative, except for the total length (head to abdominal tip, without the antennae), which is expressed in millimetres. The following abbreviations are used in the descriptions: POL is the distance between the inner edges of the two lat- eral ocelli; OL is the distance between the inner edges of a lateral ocellus and the median ocellus; OOL is the distance from the outer edge of a lateral ocellus to the compound eye; OPL is the distance from the posterior edge of a lateral ocellus to the occipital ca- rina; I'L is the distance from the posterior edge of an eye to the occipital carina. The term “metapectal-propodeal complex” is here used in the sense of Kawada et al. (2015). It corresponds to the term “propodeum” sensu Olmi (1984, 1994), Olmi and Virla (2014), Olmi and Xu (2015) and Xu et al. (2013). The term “ADO’s” is here used in the sense of Riolo et al. (2016). It corresponds to the term “rhinaria” sensu Olmi (1984, 1994), Olmi and Virla (2014), Olmi and Xu (2015) and Xu et al. (2013). The types of all Oriental species of Aphelopus have been previously examined by the authors. The type specimen described in this paper is deposited in the collection of the Queen Sirikit Botanic Garden, Chiang Mai, Thailand (QSBG). Results Genus Aphelopus Dalman, 1823 Aphelopus Dalman, 1823: 8. Type species: Dryinus atratus Dalman, 1823, by subse- quent designation of Westwood (1839). Diagnosis. Female: Fully winged; epistomal suture not touching antennal toruli; oc- cipital carina complete; antenna without ADO’s; palpal formula 5/2; forewing with cos- Description of Aphelopus fuscoflavus, a new species of Dryinidae from Thailand... TF tal cell enclosed by pigmented veins, with pterostigma; stigmal vein long and regularly curved; course of forewing veins not marked by dark stripes; hind wing hyaline, with costal cell, without dark medial longitudinal stripe; protarsus not chelate; tibial spurs 1/1/2. Male: fully winged; epistomal suture not touching antennal toruli; occipital carina complete; palpal formula 5/2; forewing with costal cell enclosed by pigmented veins, with pterostigma; stigmal vein long and regularly curved; course of forewing veins not marked by dark stripes; hind wing hyaline, with costal cell, without dark medial longi- tudinal stripe; basivolsella situated completely below distivolsella apex; tibial spurs 1/1/2. Aphelopus fuscoflavus sp. n. http://zoobank.org/FF150F3A-F60D-4702-B992-08DE179813E9 Figs 1-3 Diagnosis. Male with antenna filiform; head testaceous, except large brown spot on vertex; Mesosoma testaceous, except area of scutum between notauli darkened, scutel- lum and metanotum brown, metapectal-propodeal complex black; notauli complete, posteriorly separated; basivolsella with one subdistal bristle, fused with paramere. Description. Male. Fully winged (Fig. 1). Length 1.7 mm. Head testaceous, except large brown spot on vertex. Antenna yellow, except segments 4—10 darkened. Mesoso- ma testaceous, except area of scutum between notauli darkened, scutellum and metano- tum brown, metapectal-propodeal complex black. Metasoma brown. Legs yellow. An- tenna filiform. Antennal segments in following proportions: 3:3:4:4:5:6:6:6:6:9. Head dull, granulated. Frontal line incomplete, present in anterior half of face. Occipital carina. complete: POL= 77OL.=3; OOL= 2; OPL= 2:5; Th:=2;ereatest breadtho: posterior ocelli shorter than OL (2:3). Scutum, scutellum and metanotum dull, gran- ulated. Notauli complete, posteriorly separated; minimum distance between notauli longer than greatest breadth of posterior ocelli (3:2). Metapectal-propodeal complex with dorsal surface (i.e. metapostnotum) dull, reticulate rugose; posterior surface (i.e. first abdominal tergum) reticulate rugose, with median area shiny, unsculptured. Fore- wing hyaline, without dark transverse bands. Basivolsella (Fig. 2) fused with paramere and with one subdistal bristle. Tibial spurs 1/1/2. Female. Unknown. Material examined. Holotype: male, Thailand, Sakon Nakhon Province, Phu Phan National Park, Nam Hom Waterfall, Sao Hi, 17°07.340'N 104°20.788’'E, 344 m, 25—31.]11.2007,Malaise trap, 12377, Sailom Tonqboonchai leg. (QSBG). Hosts. Unknown. Etymology. The name fuscoflavus derives from the Latin adjectives “fuscus” (dark) and “flavus” (yellow), because of the partly testaceous and partly brown colour. Remarks. Because of the head testaceous, except large brown spot on vertex, the mesosoma partly testaceous and partly brown, the complete notauli, the basivolsella with one subdistal bristle, the new species is similar to Aphelopus zonalis Xu, Olmi & He, 2013, described from China, Hainan. The main difference between A. fuscoflavus 118 Adalgisa Guglielmino et al. / Journal of Hymenoptera Research 57: 115-121 (2017) Figure |. Aphelopus fuscoflavus sp. n.: male holotype in dorsal view. Length 1.7 mm. and A. zonalis is centered on the structure of the basivolsella; fused with the paramere (Fig. 2) in A. fuscoflavus, not fused in A. zonalis (Fig. 3). In the key to the males of the Oriental Aphelopus species published by Xu et al. (2013), the new species can be included by replacing couplets 1-4 as follows: 1 Mesosoma and metasoma totally testaceous, except petiole black... PN: ee ce nel RE EEL on ee ee, Barden, cen a A. borneanus O\lmi - Mesosoma and metasoma partly or totally black or brown... eee eeeeeeees 2 2, Head testaceous, at most with ocellar region, or vertex, or part of face dark- re] b Yaa Ne eye Ri rs ere Oe Ie RR CO ny Oe OR ear come ae 3 - Flead tnostly, or totally, black Or Drow. sjesse'-sauacs tone detioos tuseneaetaaaneatiee-vese 8 3 Notauli ase ritecrierac 8 sees an cde sedse onto beeanpe rasa ee dase A, maculiceps Bergman — Nota aistincn.2.Ua Fae a. eee bee. ie Powe se Ae, ee 4 4 Basivolsellaswithtonessubdistall bristle (Pigs. 2, <3) slits iacsPesdlaa tas elcteseuede 4? — Basivolsella with two subdistal bristles .............ccccccssssssssscccesccessseeseesssesseeeees 5 5 Basivolsella not fused with paramere (Fig. 3) ..... A. zonalis Xu, Olmi & He - Basivolsella fused with paramere (Fig. 2)........ cesses A. fuscoflavus sp. n. Description of Aphelopus fuscoflavus, a new species of Dryinidae from Thailand... 119 Figures 2-3. Male genitalia, holotypes, left half removed. 2 Aphelopus fuscoflavus sp. n. 3 A. zonalis Xu, Olmi & He, 2013 (from Xu et al. 2013) (b = basivolsella; d = distivolsella; p = paramere). Scale bars = 0.09 mm (2), 0.10 mm (3). Conclusion Xu et al. (2013) recorded 71 species of Dryinidae from Thailand. Subsequently, Olmi et al. (2015) added an additional species: Anteon huettingeri Olmi, Xu & Guglielmino, 2015. Dryinidae of Thailand belong to the following genera: Aphelopus Dalman, 1823 (seven species), Crovettia Olmi, 1984 (one species), Anteon Jurine, 1807 (27 species), Deinodryinus Perkins, 1907 (two species), Bocchus Ashmead, 1893 (three species), Thaumatodryinus Perkins, 1905 (two species), Dryinus Latreille, 1804 (13 species), Pseudodryinus Olmi, 1991 (one species), Neodryinus Perkins, 1905 (five species), Ech- throdelphax Perkins, 1903 (three species), Haplogonatopus Perkins, 1905 (one species) and Gonatopus Ljungh, 1810 (seven species). With the description of the above new species the number of species now known from Thailand is 73. In comparison with the 193 species recorded in China by He and Xu (2002) and the 62 and 40 listed respectively in India and Laos (Xu et al. 2013), the dryinid fauna of Thailand is poorly known. Some genera such as Gonatopus (with only seven species listed) are clearly understudied. However, the dryinids of Thailand will be better understood in the future. In fact, during the three year period 2006-2009, an intensive survey of the terrestrial arthro- pod fauna of Thailand was conducted by the Queen Sirikit Botanic Garden, The Thai Forestry Group, The Hymenoptera Institute and The Natural History Museum of Los Angeles County (TIGER: Thailand Inventory Group for Entomological Research, 120 Adalgisa Guglielmino et al. / Journal of Hymenoptera Research 57: 115-121 (2017) coordinated by Michael Sharkey) (http://sharkeylab.org/tiger/). This survey resulted in the collection of about 5000 specimens of Dryinidae, which are actually in study in the authors’ laboratories. The new species described herein is one of the first results of this study. Acknowledgements Many thanks to Dr. Michael Sharkey (Department of Entomology, University of Ken- tucky, Lexington, Kentucky, USA) for sending the specimen of Aphelopus described in the present paper. We are also grateful to all curators of collections who have sent us type material on loan. We are very indebted to Michael Ohl and Denis Brothers for their useful comments and suggestions to improve the manuscript. This paper was sup- ported by the National Natural Science Foundation of China (No. 31472027). References Ashmead WH (1893) Monograph of the North American Proctotrypidae. Bulletin of the United States National Museum, 45: 1-472. https://doi.org/10.5479/si.03629236.45.1 Dalman CR (1823) Analecta entomologica. 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