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Diptera: Syrphidae) Annales de la Société entomologique de France (N.S.) International Journal of Entomology ISSN: 0037-9271 (Print) 2168-6351 (Online) Journal homepage: http://www.tandfonline.com/loi/tase20 Hoverflies of the Guelma district, with species new to Algeria and North Africa (Diptera: Syrphidae) Besma Haffaressas, Sihem Djellab, Farrah Samraoui, Ahmed H Alfarhan, Francis Gilbert, Antonio Ricarte & Boudjéma Samraoui To cite this article: Besma Haffaressas, Sihem Djellab, Farrah Samraoui, Ahmed H Alfarhan, Francis Gilbert, Antonio Ricarte & Boudjéma Samraoui (2017) Hoverflies of the Guelma district, with species new to Algeria and North Africa (Diptera: Syrphidae), Annales de la Société entomologique de France (N.S.), 53:5, 324-333 To link to this article: http://dx.doi.org/10.1080/00379271.2017.1355262 Published online: 09 Aug 2017. Submit your article to this journal Article views: 16 View related articles View Crossmark data Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=tase20 Download by: [University of Nottingham] Date: 18 September 2017, At: 04:14 Annales de la Société entomologique de France (N.S.), 2017 Vol. 53, No. 5, 324–333, https://doi.org/10.1080/00379271.2017.1355262 Hoverflies of the Guelma district, with species new to Algeria and North Africa (Diptera: Syrphidae) Besma Haffaressasa, Sihem Djellabb, Farrah Samraoui a, Ahmed H Alfarhanc, Francis Gilbertd, Antonio Ricartee & Boudjéma Samraoui a,f* aLaboratoire de Conservation des Zones Humides, University of Guelma, Guelma, Algeria; bDepartment of Biology, University of Tebessa, Tebessa, Algeria; cDepartment of Botany and Microbiology, King Saud University, Riyadh, Saudi Arabia; dSchool of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK; eCentro Iberoamericano de la Biodiversidad (CIBIO), Universidad de Alicante, Carretera San Vicente del Raspeig s/n, San Vicente del Raspeig, Alicante 03690, Spain; fBiology Department, University of Annaba, Annaba, Algeria (Accepté le 18 juin 2017) Summary. A survey of the hoverflies (Diptera: Syrphidae) of the region of Guelma, northeast Algeria, was carried out from August 2011 to July 2013. A total of 31 species was recorded with six (Scaeva mecogramma, Epistrophe melanostoma, Syrphus vitripennis, Brachypalpus valgus, Merodon calcaratus and M. chalybeus) new to Algeria. Of these, three species (E. melanostoma, M. calcaratus and M. chalybeus) are also new additions to the entomofauna of North Africa. The results complement those of a previous study covering Numidia and Tebessa and provide a more comprehensive view of the phenology and distribution of Syrphidae across northeast Algeria. An improved knowledge of the distribution of North African hoverflies will contribute to a better assessment of the status of each taxon and inform conservation efforts. Résumé. Syrphidae (Diptera) de la Wilaya de Guelma : espèces nouvelles pour l’Algérie et l’Afrique du Nord.Un inventaire des Syrphidae (Diptera) dans la région de Guelma, nord-est de l’Algérie, a été réalisé d’août 2011 à juillet 2013. Au total, 31 espèces ont été identifiées, dont 6 (Scaeva mecogramma, Epistrophe melanostoma, Syrphus vitripennis, Brachypalpus valgus, Merodon calcaratus et M. chalybeus) sont nouvelles pour l’Algérie. Trois de ces espèces (E. melanostoma, M. calcaratus et M. chalybeus) sont aussi nouvelles pour l’entomofaune d’Afrique du Nord. Ces résultats complètent ceux d’une étude précédente qui couvrait les régions de Numidie et de Tebessa. Ils apportent ainsi une vue plus complète de la phénologie et de la distribution des Syrphidae dans le nord-est algérien. Une meilleure connaissance de la distribution des Syrphidae en Afrique du Nord contribue ainsi à une meilleure évaluation du statut de chaque taxon et renseigne sur les nécessités de conservation. Keywords: biodiversity; Malaise trap; faunistics; species richness Owing to its outstanding plant richness and high level of fresh impetus for the search for indicator species to monitor endemism, the Mediterranean Maghreb is considered to be biodiversity and ecosystem health (Lawton et al. 1998; Hilty one of the most important biodiversity hotspots of the & Merenlender 2000). Among the insects, a good candidate planet (Medail & Quezel 1999; Myers et al. 2000). which may appropriately fill this role is the hoverflies Downloaded by [University of Nottingham] at 04:14 18 September 2017 Northeast Algeria, part of this southern Mediterranean (Syrphidae), which exhibit a large spectrum of adaptations region, also hosts a diverse insect fauna with many ende- allowing them to exploit a wide range of habitats and micro- mics (Samraoui & Menaï 1999; Annani et al. 2012; Chaib habitats, thus occupying most terrestrial and aquatic habitats et al. 2013) and a rich array of rare plant species (Véla & (Rotheray 1993; Rotheray & Gilbert 2011). Benhouhou 2007). However, as happened elsewhere As biodiversity is eroded through climate change, across the Mediterranean Basin (Blondel et al. 2010), pollution, species invasions and habitat loss, hoverflies human pressures have for centuries relentlessly been erod- may constitute an excellent tool in environmental assess- ing the biodiversity of this region, raising concerns for the ments. Indeed, insects represent an important segment of conservation of this hotspot. overall biodiversity that also requires adequate manage- Both plants and insects make up a large component of the ment to maintain ecosystem functioning. In addition, like overall biodiversity, and indications of patterns of covariation many other invertebrates, insects respond in a faster way in species richness between these two groups (Schaffers et al. to environmental changes and thus constitute models of 2008;Bassetetal.2012; Zhang et al. 2016)haveprovided choice for biomonitoring and biodiversity assessments *Corresponding author. Email: [email protected] © 2017 Société entomologique de France Annales de la Société entomologique de France (N.S.) 325 (Kremen et al. 1993; McGeoch 1998; Samways et al. Ricarte et al. (2012). Photos were produced as composites of 2010). individual images made with a camera (Leica DFC 450) attached The Syrphidae of Algeria have been surveyed since the to a binocular stereomicroscope (Leica M205 C) and combined in Adobe Photoshop® v. 2015. All specimens are kept in the insect nineteenth (Lucas 1849) and early twentieth centuries (Becker collection of the Laboratoire de Conservation des Zones Humides, 1907), and despite significant progress over several decades University of Guelma, Algeria. (Séguy 1961;Peck1988;Hurkmans1993; Kassebeer 1999), this taxon remains poorly known, and thus many additions and corrections are to be expected once in-depth studies Study area commence. In the early 1990s, a long and sustained effort The district (wilaya) of Guelma is sandwiched between the sub- humid coastal area of Numidia, which includes the Guerbes- was deployed (Djellab & Samraoui 1994; Djellab et al. 2013) Senhadja region, Annaba and the El Kala National Park to improve our knowledge of this family, concentrating on the (Samraoui & de Bélair 1997; Samraoui & Samraoui 2008), and regions of Numidia and Tebessa. The present study continues the semi-arid regions of Constantine, Oum El Bouaghi and these efforts by attempting to fill a knowledge gap for one Tebessa, located further south (Figure 1). At least four mountains region, Guelma, located halfway between Numidia and with elevations above 1000 m are located in Guelma, two of which (Maouna and Debagh peak at 1411 m and 1060 m, respectively) Tebessa. In addition, most specimens collected in the 1990s are mainly characterized by dense forest cover made up of holm were unfortunately lost, and thus attempts were made to oak (Quercus ilex), cork oak (Quercus suber), zeen oak (Quercus mitigate this loss by setting up a new reference collection. canariensis) and Aleppo pine (Pinus halepensis). A narrow plain made up by the passage of Wadi Seybouse cuts through this rugged terrain. Wadi Seybouse is a Mediterranean river Material and methods 134.7 km long, with its sources in the semi-arid Hauts Plateaux (Yalles Satha & Samraoui 2017). It drains a large basin of Fieldwork 6570 km2. The Seybouse watercourse is mainly the result of the For three consecutive years (2011–2013), sampling was carried confluence of two wadis, Bouhamdane and Cherf, which converge out using a hand net and through Malaise traps at 16 sites within at Medjaz Amar giving rise to the Seybouse. This latter wadi then the three separate localities of Maouna, Debagh and Seybouse proceeds through the plain of Guelma/Bouchegouf on its way (Table 1). Unfortunately, vandalism was omnipresent and most northward towards the sea, which it reaches at Annaba. Malaise traps were stolen or destroyed, resulting in inconsistent The climate of the Guelma region is typically Mediterranean, sampling. Collection of specimens complied with the code for located between two bioclimatic regions: the continental semi- insect collecting (Samways et al. 2010). arid climate of the Hauts Plateaux, and the subtropical humid and sub-humid climates of coastal Numidia. The annual rainfall averages 650 mm (Yalles Satha & Samraoui 2017). Material examined Specimens were identified by A.R. and B.S. using keys and descrip- tions in Bezzi (1924), Goeldlin de Tiefenau (1976), Vujić (1999), Results ć Š ć Vuji & imi (1999), Lyneborg & Barkemeyer (2005), Reemer The survey recorded 31 species, with six new to Algeria, et al. (2005), Van Veen (2010).
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