Acta Arachnologica, 51(1): 19-22, June 28, 2002 A new species of Tetranychus (Acari: Tetranychidae) from the Kinki District, Japan Shozo Eharal, * & Kazunori Ohashi2 'Hamasaka 2 -15-7 , Tottori, 680-0001 Japan 2Laboratory of Ecological Information , Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502 Japan Abstract - Tetranychus takafujii Ehara & Ohashi sp. nov. is described from the black nightshade, Solanum nigrum L. (Solanaceae) in Osaka. This new mite was found to severely attack S. nigrum, S carolinense L. (horse nettle), and S. melongena L. (eggplant) in Osaka and Kyoto. Key words - Acari, eggplant, Japan, new species, Solanum, Tetranychidae, Tetranychus takafujii In a recent revision of the spider mite family Tetrany- Genital flap with transverse striae; area immediately ante- chidae of Japan (Ehara 1999), 78 species were reported to rior to flap with longitudinal striae. Palpus with spinneret occur in this country. Later Tetranychus neocaledonicus about one and a half times as long as broad; dorsal Andre 1933 was recorded for the first time in Japan (Ehara sensillum slender, subcylindrical (Fig. 2). The number of & Yamaguchi 2001). setae and solenidia (in parentheses) on leg segments: femora Very recently, one of us (K. 0.) found an unfamiliar spi- 10-6-4-4, genua 5-5-4-4, tibiae 9(1)-7-6-7, tarsi 13 (1)+ 2 der mite species severely attacking a few species of plants dupl.-13(1)+ 1 dupl.-9(1)-10(1). Tarsus I with proximal set belonging to the genus Solanum in Osaka and Kyoto, and of duplex setae nearly in line with proximal tactile setae, sent some specimens to S. E. to determine the species. On and not in line with solitary proximal solenidion (Fig. 7); close examination this mite was found to be an undescribed tarsus II with 3 tactile setae and 1 solenidion proximal to species of the genus Tetranychus Dufour. The species is de- duplex setae (Fig. 8). Empodia I and II with 3 pairs of scribed as new in this paper. proximoventral hairs and minute mediodorsal spur (Figs. 7, The setal nomenclature is the same as that of Ehara 8); empodia III and IV with mediodorsal spur practically ab- (1999). The measurements are given in micrometers, and sent. those of the holotype are in parentheses following the mean. Male. Body, including rostrum, 471 long, 217 wide; The holotype and paratypes are preserved in the collection milk-white to pale orange. Lengths of setae (n=10): P160.1 of the National Science Museum, Tokyo. ±0.8 (59.0), P2115.7 i15.7±2.1(114.0), P3 80.5±1.5 (81.5), H 92.6 ± 1.5 (94.8), C 1 98.8 ± 1.7 (100.0), C2 99.3 ± 2.0 Tetranychus takafujii sp. nov. (101.0), C3 96.0±1.5 (94.0), C4 78.4±1.4 (78.0), C5 35.2 [Japanese name: Mitsuyubi-nami-hadani] ±1.3 (32.2), L 1 101.1±1.6 (101.5), L2104.2±1.8 (102.0), (Figs. 1-10, 11A, B) L3 97.9± 1.8 (100.0), L4 64.7± 1.1 (65.0). Aedeagus up- turned distally; terminal knob slender, about 2.6 long, with Female. Body, including rostrum, 595 long, 353 wide dorsal margin slightly convex; anterior tip of knob slightly (Fig. 1); pale orange (young) to dark orange (matured); legs angulate; the posterior projection elongate, tapering; axis of pale orange (Fig. 11A, B). Dorsal idiosomal setae slender, knob forming a definite angle with axis of shaft (Figs. 4-6). much longer than distances between consecutive setae; Spinneret about twice as long as broad, dorsal sensillum lengths of setae (mean ± SE, n=10): P1 76.3 ±0.6, P2 163.8 subcylindrical (Fig. 3). Setae and solenidia (in parentheses) ±2.3, P3 116.2±1.1, H 139.4±0.8, Cl 154.6±1.9, C2 on podomeres: femora 10-6-4-4, genua 5-5-4-4, tibiae 9(4)- 148.0±1.9, C3 147.7±2.2, C4 132.1±2.1, C5 52.7±0.7, 7-6-7, tarsi 13(3)+ 2 dupl.-13(1)+ 1 dupl.-9(1)-9(1). Tarsus L 1 150.6±1.8, L2 149.9±1.5, L3 145.8±1.4, L4 104.8± I with 3 tactile setae and 2 solenidia proximal to proximal 1 .7. Opisthosomal striae longitudinal between setae C3 and set of duplex setae, and 1 tactile seta near proximal duplex between C4, forming a diamond-shaped figure between setae (Fig. 9); tarsus II with 3 tactile setae and 1 solenidion these setae; dorsal opisthosomal striae with lobes rounded proximal to duplex setae (Fig. 10). Empodium I with small distally, very variable in shape. Peritreme hooked distally. mediodorsal spur and pair of proximoventral spurs (Fig. 9). Empodium II with small mediodorsal spur; each of * To whom correspondence should be addressed . proximoventral spurs divided into 3 small spurs distally, which show high variability in size among specimens but Fax: +81 -857-23-8712 20 S. Ehara & K. Ohashi Figs. 1-6. Tetranychus takafujii sp. nov. - 1, dorsum (~); 2, 3, distal segment of palpus, with another spinneret (2, ~; 3, holotype ~); 4-6, aedeagi (4, holotype). C1-C5, dorsocentral opisthosomal setae; H, humeral seta; L1-L4, dorsolateral opisthosomal setae; P1-P3, prodorsal setae. All the figures to scale except for Fig. 1. are not hairy (Fig. 10). Empodia III and IV with small slides (NSMT-Ac 11288-11302): Osaka (K. Ohashi leg.): 25-, mediodorsal spur and 3 pairs of proximoventral hairs. with the same data as holotype; 1 Kunijima, Higashi- Type series. Holotype: (NSMT-Ac 11287), Yodogawa yodogawa-ku, 11-VI-2001, on S. nigrum; 1 ' 1~, Y. R. P., Riverside Park, Fukushima-ku, Osaka, 28-IX-2001 (K. Ohashi Fukushima-ku, 28-IX-2001, on S. carolinense L. (horse nettle); leg.), on Solanum nigrum L. (black nightshade). Paratypes: 15 1 1~, Y. R. P., Kita-ku, 28-IX-2001, on S. melongena L. Acta Arachnologica, 51(1), June 2002 OArachnological Society of Japan A new species of Tetranychus 21 Figs. 7-10. Tetranychus takafujii sp, nov. - 7, tarsus and tibia I (~); 8, tarsus and tibia II (~); 9, tarsus and tibia I (s); 10, tarsus and tibia II (s). (eggplant); 16?-, Y. R. P., Fukushima-ku, 28-X-2001, on S. Moreover, the male of T. takafujii is distinctive in having nigrum; 25-, Y. R. P., Fukushima-ku, 28-X-2001, on S. empodium II as mentioned above, as opposed to divided carolinense; 1 Y. R. P., Kita-ku, 28-X-2001, on S. into proximoventral hairs. melongena. T takafujii also resembles T. ludeni Zacher 1913 in the Other specimens. Kyoto (K. Ohashi leg.): 3 Moriyama- setal arrangement of female tarsus I (Pritchard & Baker cho, Nakagyo-ku, 3-XII-2001, on S. nigrum; Demizu-cho, 1955; Ehara & Masaki 1989; Baker & Tuttle 1994). Kamigyo-ku, 3-XII-2001, on S. nigrum; 4a6~, Tanaka- However, the female of T. ludeni has a carmine instead of shimoyanagi-cho, Sakyo-ku, 3-XII-2001, on S. carolinense. pale to dark orange body, and the male differs in the shape Distribution and hosts. Japan (Honshu), on Solanum. of the aedeagus and empodium II. Incidentally, T. ludeni Remarks. Tetranychus takafujii sp. nov. closely resem- was often found to occur along with T. takafujii on Solanum bles T evansi Baker & Pritchard 1960 known from in Osaka. Mauritius, Africa, the United States, Brazil, etc. (Baker & As stated above, a few plant species of Solanum in Osaka Pritchard 1960; Moraes et al. 1987; Baker & Tuttle 1994). and Kyoto, including eggplant, were recognized to be heav- However, male empodium II of T. takafujii differs in having ily infested by T. takafujii (Fig. 11 C, D). It is possible that 3 pairs of small but distinct proximoventral spurs which are this new mite species becomes a noteworthy pest of not hairy, as opposed to a pair of slightly digitate Solanum plants in Japan. proximoventral spurs as in T evansi. Etymology. This new species is named in honor of Dr. The aedeagus of T. takafujii is also similar to that of T Akio Takafuji, Professor of Graduate School of Agriculture, marianae McGregor 1950 known from the Tropical Pacific Kyoto University. Area, the Southeast Asia, and North and South America Acknowledgment (McGregor 1950; Pritchard & Baker 1955; Moraes et al. 1987). However, the female of T. takafujii may be discrimi- We wish to thank Dr. A. Takafuji for his valuable suggestions dur- nated from T. marianae by the proximal duplex pair on tar- ing the course of this work. sus I not in line with the solitary proximal solenidion, as opposed to being in line with the solitary solenidion. Acta Arachnologica, 51(1), June 2002 OArachnological Society of Japan 22 S. Ehara & K. Ohashi Fig. 11. Tetranychus takafujii sp. nov., photographs. A, young adult females on Solanum nigrum; B, mature adult females on S. nigrum; C, injury to eggplant leaf; D, injury to leaves of S. nigrum. neocaledonicus Andre (Acari, Tetranychidae) from Amami-Oshima References Island, Japan. Plant Protection (Tokyo), 55: 268-272. (In Japanese) McGregor, E. A. 1950. Mites of the family Tetranychidae. Amer. Andre, M. 1933. Note sur un Tetranyque nuisible au cotonnier en Midl. Nat., 44: 257-420. Nouvelle-Caledonie. Bull. Mus. Natl. Hist. Nat. Paris (ser. 2), 5: Moraes, G. J. de, McMurtry, J. A. & Baker, E. W. 1987. 302-308. Redescription and distribution of the spider mites Tetranychus Baker, E. W. & Pritchard, A. E. 1960. The tetranychoid mites of evansi and T. marianae. Acarologia, 28: 333-343. Africa. Hilgardia, 29: 455-574. Pritchard, A. E. & Baker, E. W. 1955. A revision of the spider mite Baker, E. W. & Tuttle, D. M. 1994. A Guide to the Spider Mites family Tetranychidae. Pac. Coast Entomol. Soc. Mem., 2: 1-472. (Tetranychidae) of the United States. Indira Publishing House, West Zacher, F. 1913. Untersuchungen uber Spinnmilben. Mitt. kais. Biol. Bloomfield, Michigan, 347 pp. Land-Forst., 14: 37-41. Ehara, S. 1999. Revision of the spider mite family Tetranychidae of Japan (Acari, Prostigmata). Species Diversity, 4: 63-141. Received March 7, 2002 / Accepted March 21, 2002 Ehara, S. & Masaki, M. 1989. Notes on two Japanese species of Tetranychus (Acarina: Tetranychidae). Acta Arachnol., 38: 49-54. Ehara, S. & Yamaguchi, T. 2001. Discovery of Tetranychus Acta Arachnologica, 51(1), June 2002 ©Arachnological Society of Japan 79 Acta Arachnologica Vol.51,No.1掲 載 論 文 の 和 文 要 旨 アシナガグモの生活史(pp.1-4) (Yoshida 1985),ホ シ ミジングモT.martinae (Roberts 1983), 吉田 真(〒525-8577滋 賀県草津市野路東1-1-1立 命館大 キベ リミジングモT.flavmarginatus (Bosenberg & Strand 1906), 学理工学部生物工学科) カニ ミジングモT.mustelinus (Simon 1889)お よびクロホ シミ 野外調査 と飼育 によって,ア シナガグモ(Tetragnatha ジ ングモT.nigromaculatus (Yoshida 1987)は ミジ ングモ属 praedonia)の 生活史を調べた.野 外では,新 たに孵化したと思 Dipiena Thorell 1869よ り,さ らに1種,シ ロカネヒラタヒメ われる子グモが,6月 から9月 の間に繰り返 し出現 した.出 の グモemertonella tacxanowskii (Keyserling 1886)は ヒラタ ヒメ う直後か ら育てられた10頭 のうち,5頭(オ ス2頭 とメス3 グモ属.euryopis Menge 1868よ り新 たに属 を移動 した.ま た, 頭)が 成体となった.出 のうから最終脱皮までの期間は,オ ス タニカワミジングモ(新 称)Dipoena nipponicaを 新種として記 では57-59日,メ スでは47-51日 であった.新 たに孵化した子 載 した.さ らに,中 国で記載 されたDipoena immaculata Zhu グモの度重なる出現と短い生活史は,ア シナガグモが年2-3世 1998を キベリミジングモT.flavomarginatusの,ま た北アメリ 代の回転率をもっことを示唆している. カ産の種をタイプ種とする属 、Pselothorax chanberlinを ア イチミジングモ属Lasaeolaの 新参異名とした.フ タホシヒラ アカクモヒメバチによるサツマノミダマシへの寄生の初記録 タヒメグモEuryopis iharai Yoshida 1992は 所属が不明確のため 【短報】(PP.5-6) 本稿では除外した. 桝元敏也1,清 水 勇1,小 西和彦2(1〒522-2113大 津市上田上 平野町字大塚509-3京 都大学生態学研究センター;2〒062- 近畿地方でナス属を食害するナミハダニ属(ハ ダニ科)の1新 8555札 幌市豊平区羊 ヶ丘1独 立行政法人 農業技術研究機 種(pp.19-22) 構 北海道農業研究センター虫害研究室) 江原昭三',大 橋和典2(1〒680-0001鳥 取市浜坂2丁 目15-7; 2〒606-8502京 都市左京区北白川追分町 京都大学大学院農学 アカクモヒメバチ Eriostethus rufus (Uchida,1932)は 従来 Araneus 属のクモに寄生するとされていた.し かし,我 々はこ 研究科) のハチが別属であるNeoseona 属のクモに寄生することを発見 大阪 ・京都両市の市街地でナス属(Solanum)の3種 の植物 した.ア カクモヒメバチとその宿主であるクモとの関係は再検 (イ ヌホオズキ,ワ ルナスビおよびナス)に 多発していたハダ 討する必要がある. ニを新種 と認め,Tetranychus takafujii(ミツ ユビナ ミハダニ, 新称)と 命名 ・記載した(ホ ロタイプは大阪市福島区淀川河川 日本産ミジングモ亜科(ク モ目:ヒ メグモ科)の 属および種の 公園のイヌホオズキから採集 した♂).本種は,国 外のT.evansi 検討(PP.7-18) Baker & Pritchardに 最もよく似ているが,♂ の第II脚 の爪間体 吉田 哉(〒990-2484山 形市篭田2丁 目7番16号) の形態で異なる.挿 入器は国外産のT.marianae McGregorの そ 日本産のミジングモ亜科Hadrotarsinae Thorell 1881の 属およ れにも似るが,♀ ♂の脚の形態で相違する.脚 の毛の配列は日 び種の検討をおこなった.こ の亜科の特徴は,雌 の受精のうが 本のアシノワハダニにも類似するが,挿 入器の形態で識別でき 2対 で雌の触肢の爪が背腹方向に扁平,第1歩 脚附節腹面に特 る.こ のハダニは,日 本国内でナス属の主な害虫の一つになる 化した毛があることおよび糸疣前疣の中央に洗濯板状の突出部 可能性を持っていると思われる. があることである. すべての種に検討を加え,属 の検索表を表 し,日 本から6属 中国のアシダカグモ科2.長 春コレクションに含まれる種 19種 を記録 した.こ のうち,ヤ ギヌマミジングモ属(新 称) Peter Jager', Jiuchun Gao2, Rui Fei2 (' Institute fiir Zoologie, Yaginumena を新属として記載 し,ツ ッミジングモ属(新 称) Johannes Gutenberg-Universitat, Germany; 2Jilin University, P. R. Trigonobothrys Simon 1889お よびシロカネヒラタヒメグモ属 China) (pp. 23-31) (新称)Emertonella Bryant 1949を 属として復活 した.さ らに, アシダカグモ科の2新 種:Sinopoda angulata と S.fasciculata アイチ ミジングモ属(新 称)Lasaeola Simon 1881に 属す る種 を記載した.Pseudopoda sp.cf.exiguoides と Pseudopoda属の を 日本 より記録 した.こ れ らの属 に属す る12種,ボ カ シミジ 種名未決定種をそれぞれを湖南省と四川省から記録した.ア シ ングモ Yaginumena castrata (Bosenberg & Strand 1906),コ ァ ダカグモHeteropoda venatoriaを広東省と雲南省から記録した. カクロ ミジングモY.mutilata (Bosenberg & Strand 1906),マ ダ ツユグモMicrommata vireescensを吉林省から初めて記録した. ラ ミジングモY.maculosa (Yoshida & Ono 2000),オ キナワ ミ Olios tiantongensisを同種とみられる2雄 をそれぞれ江蘇省と ジングモ.Lasaeloa okinawana (Yoshida & Ono 2000),ヨ シダ ミ 湖南省から記録 した.O.menghaiensisを 同種 とみられる1♀を ジ ングモL.yoshidai (Ono 1991),ヨ ナ ミジ ングモL.yona 雲南省から記録 した.Eusparassus sanguinifrons Simon 1906の (Yoshida & Ono 2000),ヤ マ ト ミジ ング モTrigonobothrys 雌を初めて記載し,Oliosへ 転属 した.全 種の生殖器を図示し japonicus (Yoshida 1985),ア マ ミミジングモT.amamiensis た.(和 訳:編 集委員会) Acta Arachnologica,51(1),June 2002(C)ArachnologicalS ociety of Japan