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Diptera: Sciomyzidae) from Mitaraka (French Guiana), with Notes on the Genus

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Diptera: Sciomyzidae) from Mitaraka (French Guiana), with Notes on the Genus DIRECTEUR DE LA PUBLICATION : Bruno David Président du Muséum national d’Histoire naturelle RÉDACTRICE EN CHEF / EDITOR-IN-CHIEF : Laure Desutter-Grandcolas ASSISTANTS DE RÉDACTION / ASSISTANT EDITORS : Anne Mabille ([email protected]), Emmanuel Côtez MISE EN PAGE / PAGE LAYOUT : Anne Mabille COMITÉ SCIENTIFIQUE / SCIENTIFIC BOARD : James Carpenter (AMNH, New York, États-Unis) Maria Marta Cigliano (Museo de La Plata, La Plata, Argentine) Henrik Enghoff (NHMD, Copenhague, Danemark) Rafael Marquez (CSIC, Madrid, Espagne) Peter Ng (University of Singapore) Gustav Peters (ZFMK, Bonn, Allemagne) Norman I. Platnick (AMNH, New York, États-Unis) Jean-Yves Rasplus (INRA, Montferrier-sur-Lez, France) Jean-François Silvain (IRD, Gif-sur-Yvette, France) Wanda M. Weiner (Polish Academy of Sciences, Cracovie, Pologne) John Wenzel (The Ohio State University, Columbus, États-Unis) COUVERTURE / COVER : View of lowland rainforest and inselbergs from the inselberg Sommet en Cloche (Mitaraka mountains, French Guiana) (photo: Marc Pollet). In medaillion, male of Thecomyia chrysacra Marinoni & Steyskal, 2003. Zoosystema est indexé dans / Zoosystema is indexed in: – Science Citation Index Expanded (SciSearch®) – ISI Alerting Services® – Current Contents® / Agriculture, Biology, and Environmental Sciences® – Scopus® Zoosystema est distribué en version électronique par / Zoosystema is distributed electronically by: – BioOne® (http://www.bioone.org) Les articles ainsi que les nouveautés nomenclaturales publiés dans Zoosystema sont référencés par / Articles and nomenclatural novelties published in Zoosystema are referenced by: – ZooBank® (http://zoobank.org) Zoosystema est une revue en flux continu publiée par les Publications scientifiques du Muséum, Paris / Zoosystema is a fast track journal published by the Museum Science Press, Paris Les Publications scientifiques du Muséum publient aussi / The Museum Science Press also publish: Adansonia, Anthropozoologica, European Journal of Taxonomy, Geodiversitas, Naturae. Diffusion – Publications scientifiques Muséum national d’Histoire naturelle CP 41 – 57 rue Cuvier F-75231 Paris cedex 05 (France) Tél. : 33 (0)1 40 79 48 05 / Fax : 33 (0)1 40 79 38 40 [email protected] / http://sciencepress.mnhn.fr © Publications scientifiques du Muséum national d’Histoire naturelle, Paris, 2018 ISSN (imprimé / print) : 1280-9551/ ISSN (électronique / electronic) : 1638-9387 PHOTOCOPIES : PHOTOCOPIES: Les Publications scientifiques du Muséum adhèrent au Centre Français d’Ex- The Publications scientifiques du Muséum adhere to the Centre Français d’Ex- ploitation du Droit de Copie (CFC), 20 rue des Grands Augustins, 75006 ploitation du Droit de Copie (CFC), 20 rue des Grands Augustins, 75006 Paris. Le CFC est membre de l’International Federation of Reproduction Rights Paris. The CFC is a member of International Federation of Reproduction Rights Organisations (IFRRO). Aux États-Unis d’Amérique, contacter le Copyright Organisations (IFRRO). In USA, contact the Copyright Clearance Center, 27 Clearance Center, 27 Congress Street, Salem, Massachusetts 01970. Congress Street, Salem, Massachusetts 01970. New data and species of Thecomyia Perty, 1833 (Diptera: Sciomyzidae) from Mitaraka (French Guiana), with notes on the genus Jonas MORTELMANS Entomology Unit, Royal Belgian Institute for Natural Sciences (RBINS), Vautierstraat 29, B-1000 Brussels (Belgium) [email protected] (corresponding author) Marc POLLET Research Institute for Nature and Forest (INBO), Herman Teirlinckgebouw, Havenlaan 88 bus 73, B-1000 Brussels (Belgium) and Research Group Terrestrial Ecology (TEREC), Ghent University, K. L.Ledeganckstraat 35, B-9000 Ghent (Belgium) and Entomology Unit, Royal Belgian Institute for Natural Sciences (RBINS), Vautierstraat 29, B-1000 Brussels (Belgium) Submitted on 3 July 2017 | Accepted on 1 March 2018 | Published on 4 September 2018 urn:lsid:zoobank.org:pub:CB2D1121-DB87-4668-94BA-0B806B35E4C1 Mortelmans J. & Pollet M. 2018. — New data and species of Thecomyia Perty, 1833 (Diptera: Sciomyzidae) from Mitaraka (French Guiana), with notes on the genus, in Touroult J., “Our Planet Reviewed” 2015 large-scale biotic survey in Mitaraka, French Guiana. Zoosystema 40 (17): 415-423. https://doi.org/10.5252/zoosystema2018v40a17. http://zoosystema.com/40/17 ABSTRACT A new species of Thecomyia Perty, 1833, T. diederiki Mortelmans n. sp., is described from French Guiana, with diagnostic characters being the absence of anteromedial setae on the midfemur; an ill- defined, tripartite, greyish mesonotal stripe; absence of upper fronto-orbital bristles; completely yel- low mid- and hind femora; typical distiphallus bearing two long, curved acrophalli; absence of male KEY WORDS anterior gonostyli; and large, triangular posterior gonostyli. All specimens were collected during the Acalyptratae, Mitaraka (French Guiana) 2015 survey that investigated an array of habitat types; the new species Sciomyzoidea, was encountered only in swamp forests. This discovery raises the number of species in this exclusively French Guiana, Costa Rica, Neotropical genus to 13. An update of the relevant couplets in the key to Thecomyia in Marinoni geographical distribution, et al. (2003) is presented to include the new species. New records of other species of Thecomyia from neotropical, Costa Rica, French Guiana, and Brazil are given, with first records of Thecomyia lateralis (Walker, snail-killing flies, survey, 1858) from Costa Rica, and first records of T. diederiki Mortelmans n. sp. and T. longicornis Perty, new species. 1833 from French Guiana. ZOOSYSTEMA • 2018 • 40 (17) © Publications scientifiques du Muséum national d’Histoire naturelle, Paris. www.zoosystema.com 415 Mortelmans J. & Pollet M. RÉSUMÉ Nouvelles données et une nouvelle espèce de Thecomyia Perty, 1833 (Diptera: Sciomyzidae) du Mitaraka (Guyane), et notes sur le genre. Une nouvelle espèce de ThecomyiaPerty, 1833, T. diederiki Mortelmans n. sp., est décrite de Guyane. Les caractères diagnostiques sont l’absence de setae antéromédiales sur le fémur 2 ; la bande mésono- tale mal définie, tripartite et grisâtre ; l’absence de soies fronto-orbitales supérieures ; les fémurs 2 et 3 complètement jaunes ; le distiphallus typique, portant deux acrophalles longs et courbés ; chez les mâles, l’absence de gonostyles antérieurs ; et des gonostyles postérieurs volumineux et triangulaires. Tous MOTS CLÉS les spécimens ont été collectés pendant l’expédition Mitaraka 2015 (Guyane) qui a étudié un éventail Acalyptratae, de types d’habitats ; la nouvelle espèce a été rencontrée seulement dans les forêts marécageuses. Cette Sciomyzoidea, Guyane, découverte augmente le nombre d’espèces dans ce genre strictement néotropical à 13. Les couplets Costa Rica, concernés dans la clé des Thecomyiade Marinoni et al. (2003) sont mis à jour pour inclure la nouvelle distribution, espèce. Des signalisations nouvelles d’autres espèces de Thecomyia sont données pour le Costa Rica, néotropical, enquête, la Guyane, et le Brésil. Sont mentionnées pour la première fois Thecomyia lateralis (Walker, 1858) du espèce nouvelle. Costa Rica, T. diederiki Mortelmans n. sp. et T. longicornis Perty, 1833 de Guyane. INTRODUCTION who reared the species through its complete life cycle. Larvae of this species are predaceous on non-operculate freshwater ThecomyiaPerty, 1833 is a genus of snail-killing flies restricted snails, whereas adults might be active nectar feeders on flow- to Central and South America (Knutson & Vala 2011). Adults ers, as is suggested by the long haustellum and proboscis are recognised by the combination of a narrow, conical face; (Knutson & Vala 2011). The latter authors also suggested a completely retractable proboscis; strongly reduced palpi; that the general brown-and-yellow body color of Thecomyia, and strongly reduced body setae (Marinoni & Mathis 2000; which is similar to that of many predatory wasps, could be Marinoni et al. 2003). Although the genus is recognised easily, a case of Batesian mimicry used to avoid predation when the currently known species of Thecomyiaare morphologically visiting flowers. very similar, and diagnostic characters are found mainly in the During separate surveys in French Guiana and Costa Rica in male postabdomen; females sometimes can be determined by 2015, researchers collected specimens of Thecomyia, including a combination of external characters, association with males, one undescribed species. In the present paper, we provide a and geographical range. description of Thecomyia diederiki Mortelmans n. sp., update Until 2003, only four species of Thecomyia were known: the relevant couplets of the key in Marinoni et al. (2003) to T. limbata (Wiedemann, 1819), T. longicornis Perty, 1833, include the new species of Thecomyia, and report on and dis- T. lateralis (Walker, 1858), and T. trilineata Hendel, 1932. cuss the results of the two above-mentioned surveys. In 1968, G. C. Steyskal (U.S. Department of Agriculture, National Museum of Natural History, Washington, DC, USA [USDA]) started taxonomic research on Thecomyia to sup- MATERIAL AND METHODS port life cycle studies being conducted by J. Abercrombie and C. O. Berg of Cornell University (Ithaca, New York, USA). Two separate entomological surveys conducted in 2015 collected Steyskal examined type specimens, figured male postabdo- specimens of Thecomyia (Fig. 1). The first survey was the “Our mens of most species and prepared a preliminary key. Steyskal Planet Reviewed” or “La Planète revisitée” Guyane 2014-2015 retired in 1979 and passed
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