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A New Species of the Genus Tetrastichus Haliday (Hymenoptera

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A New Species of the Genus Tetrastichus Haliday (Hymenoptera ZOOSYSTEMATICA ROSSICA, 21(1): 158–162 25 JULY 2012 A new species of the genus Tetrastichus Haliday (Hymenoptera: Eulophidae), parasitoid of Kokujewia ectrapela Konow (Hymenoptera: Argidae) in Iran Новый вид рода Tetrastichus Haliday (Hymenoptera: Eulophidae) – паразитоид Kokujewia ectrapela Konow (Hymenoptera: Argidae) в Иране E.N. YEGORENKOVA, Z.A. YEFREMOVA & Y. KARIMPOUR Е.Н. ЕГОРЕНКОВА, З.А. ЕФРЕМОВА & Ю. КАРИМПОУР E.N. Yegorenkova. Department of Geography, Ul’yanovsk State Pedagogical University, 4 Pl. 100-letiya Lenina, Ul’yanovsk 432700, Russia. E-mail: [email protected] Z.A. Yefremova. Department of Zoology, Ul’yanovsk State Pedagogical University, 4 Pl. 100-letiya Lenina, Ul’yanovsk 432700, Russia. E-mail: [email protected] Y. Karimpour. Department of Plant Protection, Faculty of Agriculture, Urmia University, P.O.Box 165, Iran. E-mail: [email protected] Tetrastichus kokujewiae sp. nov. (Hymenoptera: Eulophidae) is described from Iran. It was reared from pupa of Kokujewia ectrapela Konow, 1902 (Hymenoptera, Argidae). T. kokujewiae is a gregarious parasitoid developing in the cocoons of sawfly. Tetrastichus kokujewiae sp. nov. (Hymenoptera: Eulophidae) описан из Ирана. Он был выведен из Kokujewia ectrapela Konow, 1902 (Hymenoptera, Argidae). T. kokujewiae является грегарным паразитоидом, который развивается в коконах пилильщика. Key words: parasitoids, Iran, Hymenoptera, Eulophidae, Tetrastichus, Argidae, Kokujewia, new species Ключевые слова: паразитоиды, Иран, Hymenoptera, Eulophidae, Tetrastichus, Argidae, Kokujewia, новый вид INTRODUCTION but often without whorls of long setae. Mid lobe of mesoscutum with one row of adno- The genus Tetrastichus Haliday, 1844 is a taular setae. Scutellum with submedian lines large cosmopolitan genus. Its known hosts normally distinct. Propodeal median carina include Coleoptera (usually Chrysomelidae, distinct; plicae present at least posterior; occasionally Coccinellidae), Hymenoptera spiracles with paraspicular carina (Fig. 3). (Tenthredinoidea, Braconidae), occasional- Callus with 2–10 setae. SMV usually with ly Lepidoptera and Diptera, and rarely Coc- one dorsal seta (Fig. 4) (Graham, 1991). cidae (Kostjukov, 1976). The parasitoids at- Only one species of the genus Tetrasti- tack host larvae or pupae, some of them are chus, T. epilachnae (Giard, 1986) was men- hyperparasitic (Graham, 1991). tioned from Iran (Herting, 1973). Species of Tetrastichus are diagnosed The Rumex leaf defoliator sawfly, Koku- by the following characters. Malar sulcus jewia ectrapela Konow, 1902 is a new host straight or very slightly curved, anterior record for Tetrastichus species. Kokujewia margin of clypeus bidentate (Fig. 1). Anten- ectrapela may belong to the Caspian fauna na of female with 2–3 anelli (sometimes with according to the definition of de Lattin one anellus). Antenna of male with scape, (1967). It was collected in the Stavropol ventral plaque and four funical segments, Territory (Dadurian, 1962), North Ossetia © 2012 Zoological Institute, Russian Academy of Scienсes E.N. YEGORENKOVA ET AL. A NEW SPECIES OF TETRASTICHUS FROM IRAN 159 (Gussakovskij, 1935), Georgia, Armenia, parasitoid and as few as 19 and as many as Azerbaijan and northwestern part of Iran. 68 adults of it emerged from a single para- Adults occur from the lowlands (Azerbaijan: sitized host during three years of personal e.g. Mugan Plain = Muganskaya Steppe) observations by the third author (unpub- up to about 2500 m (Iran: Takht-e Suley- lished data). This species of Tetrastichus man Massif in Alborz = Elburz Mountains). overwinters as fully developed larvae and The larvae were found living on Rumex spp. pupal stage inside the host cocoons, which (Polygonaceae) (Gussakovskij, 1935). are spun by penultimate larvae of the host Kokujewia ectrapela complete four gen- before pupation. erations within the growing season and hi- Morphological terms and measurement bernates at the pupal stage inside the pro- follows that of Graham (1991) and Noyes tective cocoon in the plant litter surround- (2004). Head: HW – head width in facial ing the dock plants. The larvae of each gen- view; HL – head length in facial view (ex- eration occur on host plants for 10–20 days cluding the mouthparts); HE – height of depending on the natural conditions. Fully eye; WE – width of eye; POL – the mini- grown larvae of the first, second and third mum distance between the posterior ocelli; generation pupate within silken brownish OOL – the minimum distance between cocoons spun by the penultimate larvae, the eye margin and the adjacent posterior among or outside the host plants. The devel- ocellus; SL – length of scape; PL – length opment of K. ectrapela from egg to emerging of pedicel; F1–F4 – first, second, third adult takes 25–35 days (Karimpour, 2007). and fourth segments of antennal funicle; The taxonomic status of K. ectrapela was LC – length of clava. Thorax: PL – length defined by Blank and Taeger (1998). of propodeum; PW – width of propodeum; FL – length of forewing; FW – width of MATERIAL AND METHODS forewing; SMV – submarginal vein; MV – marginal vein, PMV – postmarginal vein; The paper is based on 253 specimens SV – stigmal vein. Gaster: LG – length of of the genus Tetrastichus reared by Dr. gaster; WG – width of gaster. Measure- Y. Karimpour. During 2006–2008, a total ments in mm are used only for body and of 128 larvae of K. ectrapela were collected fore wing lengths; other measurements are near Urmia City (Iran) in May, August and given in μm. October every year. The collected larvae The material studied is deposited at the were brought to the laboratory and trans- Zoological Institute, Russian Academy of ferred into glass boxes (70×50×30 cm) cov- Science, St Petersburg, Russia (ZIN). ered by muslin, for rearing on host plant (Rumex obtusifolius L.). The larvae were RESULTS reared at a temperature of 24±1 °C, relative humidity 65±5% and natural day light. The Family EULOPHIDAE larvae were fed daily with fresh leaves of Subfamily TETRASTICHINAE host plant until the pupal stage. After 2–3 Genus Tetrastichus Haliday, 1844 days of rearing, the larvae pupated. The pupae were placed in separate Petri dishes Tetrastichus kokujewiae Yegorenkova & and checked daily until the adult sawfly and Yefremova sp. nov. parasitoids emerged. Emergence of Tetra- (Figs 1–8) stichus adults from parasitized host occurs Holotype. Female, Iran, 12 km Northwest 10–14 days after pupation. Out of 128 lar- of Urmia [= Urümïyeh] City near Täzekand- vae of K. ectrapela collected in three years, e-Qäterchi Vill., 37°39´N, 44°58´E, altitude 24 were parasitized by a new species of Tet- 1335 m, reared from K. estrapela, July 2007, leg. rastichus. The new species is a gregarious Y. Karimpour (ZIN). © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(1): 158–162 160 E.N. YEGORENKOVA ET AL. A NEW SPECIES OF TETRASTICHUS FROM IRAN Figs 1–8. Tetrastichus kokujewiae sp. nov. 1–6, female: 1, head; 2, left antenna; 3, thorax; 4, left forewing; 5, ovipositor; 6, mid leg. 7, 8, male: 7, left antenna; 8, right forewing. Paratypes. Eighty females, 26 males, same lo- Malar sulcus curved, its length 0.82 length cality and host as for holotype (ZIN). of eye. Toruli inserted above lower margin Additional material examined. Ninety eight of eyes. Clypeus bilobed. Mandible with 5 females, 49 males, same locality and host as for unequal apical teeth, two long and three holotype (ZIN). This material possibly belongs to the same species, but it is in poor condition much shorter. Scrobes depressed and paral- and may be useful only for morphological studies. lel. Antenna (Fig. 2) with scape 4.6 times as Diagnosis. Female (body length 1.25– long as broad, with pedicel having one dis- 2.20 mm): malar sulcus curved (Fig. 1); me- coid anellus, and with funicle. F1 2.3 times soscutum on each side with five adnotaular as long as broad and 1.1 times as long as F2; setae and a second partial rows of one seta; F2 2.0 times as long as broad and equal to plicae present, curved, with branch towards F3 in length; F3 2.0 times as long as broad hind corner of propodeum; callus with five and 2.3 times shorter than clava; clava 3-seg- long setae (Fig. 3). Length of ventral plaque mented, 3.9 times as long as broad, with api- of male antenna 0.8 SL (Fig. 7). cal sensilla. Measurements in μm: HW 24.5; Description. Female (holotype; Figs 1–6). HL 20; POL 5.3; OOL 3; HE 8.5; WE 10; Body length 2.0 mm; fore wing length 1.9 mm. SL 10; PL 3; length of F1 4.5, of F2 4, and of Head (Fig. 1) 1.23 times as wide as F3 4; LC 9; length of apical sensilla 0.1. long. POL 1.8 times as great as OOL. Face Mesosoma. Thorax (Fig. 3) 1.4 times smooth; puncture of vertex and of area from as long as broad. Pronotum very short, 3.2 frons to toruli moderate-sized and sepa- times as broad as long. Mesoscutum with rated by more than their diameter. Eyes 1.2 superficial reticulation, 1.1 times as broad times as high as long, without setae. Dis- as long, with median line indicated only tance between eyes 2.9 times as long as eye. near the scutellum, and with two rows of © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(1): 158–162 E.N. YEGORENKOVA ET AL. A NEW SPECIES OF TETRASTICHUS FROM IRAN 161 adnotaular setae on each side (first row of as long as broad, with length of ventral five long adnotaular white setae, second plaque 0.8 length of scape, with pedicel, partial row of one seta). Scutellum 1.2 times with one discoid anellus, and with funicle. as broad as long, with the same sculpture F1 1.9 times as long as broad and 1.1 times as mesoscutum, with submedian and sub- shorter than F2; F2 2.0 times as long as lateral lines (distance between submedian broad and 1.1 times shorter than F3; F3 2.1 lines 1.4 times as long as distance between times as long as broad and 1.1 times longer submedian and sublateral lines), and with than F4; F4 2.0 times as long as broad and two pairs of setae.
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