Key to Species of the Genus Molothrognathus (Prostigmata: Caligonellidae)
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6 Systematic & Applied Acarology Special Publications (1997) 1 Systematic & Applied Acarology Special Publications (1997) 1, 19-24 19 Krausse. All three species of this genus were known only from adults then. Larval Willmannella were described by Feider (1956) who successfully reared W. racovitzai larvae in culture from adults. This is the only species of this genus known at both larval and post-larval stages. The host associations of this genus Key to species of the genus Molothrognathus are unknown. In this paper, we describe a new species of Willmannella from a (Prostigmata: Caligonellidae) with larval mite ectoparasitic on an undetermined dipteran in Kazerun, Iran. This is description of a new species from Iran the first record of this genus in Middle Asia and the first record of the host association of larval Willmannella. We also compare this larva with that of W. racovitzai and propose a revised definition for larval Willmannella. We also LAIRONG LIANG1 & ZHI-QIANG ZHANG2 discuss the systematic position of Willmannella within the Microtrombidiidae. 1Department of Environmental & Resource Biology, Fudan University, Shanghai 200433, China 2 The terminology and abbreviations used in this paper are found in Robaux CAB International Institute of Entomology, 56 QueenÕs Gate, London SW7 5JR, UK (1967) and Kethley (1990). Measurements in the description are given in micrometres (µm). Abstract Molothrognathus mehrnejadi Liang & Zhang sp. nov. is described from females Willmannella kazerunica sp. nov. (Figs. 1-10) collected in pistachio collar soil and bark in Rafsanjan, Iran. A key to world species of Molothrognathus is provided. Description Larva: Holotype partially fed and swollen. Colour in life unknown. Length Key words: Molothrognathus mehrnejadi, new species, Caligonellidae of idiosoma (from anterior end of scutum) 400, maximum width near level of setae c3 and d3 270. A medium-sized larva as measured by total length of legs (IP 972). Introduction Prodorsum covered predominantly by a pentagonal scutum (Fig. 1). Antero-lateral parts of scutum deflexed, with 2 antero-lateral angles directed The genus Molothrognathus was erected by Summers and Schlinger (1955) with ventrally in normal position. Scutum striate longitudinally with punctations M. leptostylus Summers & Schlinger, 1955 as type species. Members of this between striations; striations fade near 2 corners postero-lateral of setae PL and genus have peritremes originating dorsally immediately behind the stylet area anterior to setae AM; striations much denser in central area than deflexed condyle, descending on the laterobasal margins of the stylophore. Summers and antero-lateral corners, striations on latter becoming slightly reticulate in Schlinger (1995) included three species in the genus. Further contributions to posterior part. Scutum slightly convex posteriorly, covering anterior margin of the taxonomy of Molothrognathus were made by Smiley and Morse (1968) and scutellum, but strongly concave laterally at level of trichobothria (S) to Swift (1996) in the US, Soliman (1971) and Meyer and Ueckermann (1989) in accommodate eyes and associated plates. Setae AM and AL nude, their Africa, and Kuznetzov (1978) in the former USSR. Up to now, 13 species of combined length shorter than distance between their insertions (AM + AL < Molothrognathus have been described worldwide. The present paper describes a MA). Setae PL with very fine barbs, located very near postero-lateral angles of new species from Iran. A key to known species of Molothrognathus is also scutum; PL obviously longer than AM and AL, its length subequal to distance provided. ≈ between insertions of AL and PL (PL AP). Trichobothria S thin and nude, The terminology and notation used in this paper are found in Swift (1996). situated antero-mediad of PL; S longer than PL and reaching beyond tip of PL. All measurements are in micrometres. In the description, averages of measurements are given with ranges in parenthesis. 20 Systematic & Applied Acarology Special Publications (1997) 1 Systematic & Applied Acarology Special Publications (1997) 1, 5-18 5 Key to species of Molothrognathus (adult female) 1 Setae sc2 much longer than other dorsal setae ....................................... 2 - Setae sc subequal to or slightly longer than other dorsal setae ................ 9 2 Taxonomic notes on larvae of Willmannella 2 Setae sc2 and c2 of about equal length ................................................. 3 - Setae sc2 longer than setae c2 ............................................................ 5 (Acari: Microtrombidiidae) and description 3 Setae f (69-71) about as long as h1 (67-74) ............................. colei Swift of a new species from Iran - Setae f shorter than h1 .................................................................... 4 4 Setae sc2, c2, f and h1 relatively long, their lengths being 100, 100, 45-50, ZHI-QIANG ZHANG1 & ALIREZA SABOORI2 and 70, respectively ............................................... dilucidus Kunzetnov 1 International Institute of Entomology, CAB INTERNATIONAL, 56 QueenÕs Gate, - Setae sc , c , f and h shorter, their length being 72-85, 63-72, 32-38, and 2 2 1 London SW7 5JR, UK 50-60, respectively .............................. terrulantus Meyer & Ueckermann 2 5 Setae c shorter than sc and v ; striae simple, not discernible mid-dorsally Department of Entomology, College of Agriculture, Tarbiat Modarres University, 2 1 2 P.O. Box 14155-4838, Tehran, Iran between setae v1 and d ................................ crusis Summers & Schlinger - Setae c2 longer than sc1 ................................................................... 6 6 Subequal c2 and v2 longer than sc1 ................................ minutus Soliman - Setae c2 longer than setae v2; v2 and sc1 of about equal length ................. 7 Abstract 7 Medial prodorsum with normal striae, not shield-like .............................. ............................................................ fulgidus Summer & Schlinger The genus Willmannella Feider (Acari: Trombidioidea: Microtrombidiidae), - Medial prodorsum with weaker striae than surrounding area, shield-like .... 8 previously known only from New Guinea, Java and Europe, is recorded from Middle 8 Dorsal setae sc1 (28), sc2 (84-92), f (30-34), h1 (50-60) relatively long, other Asia (Iran) for the first time. Willmannella kazerunica sp. nov. is described from a dorsal setae >= 20; sc2 ≈ 2.8 times as long as f ....... mehrnejadi sp. nov. larva parasitic on an undetermined dipteran in Kazerun, Iran. A revised definition of larval Willmannella is proposed and the systematic position of this genus within the - Dorsal setae sc1 (13-19), sc2 (57-76), f (13-19), h1 (25-32) relatively long, Microtrombidiidae is discussed. other dorsal setae no longer than 20; sc2 ≈ 4 times as long as f .................. ........................................................ phytocolus Meyer & Ueckermann Key words: Willmannella, systematics, parasite, W. kazerunica sp. nov. 9 Palptibia swollen; palptarsus about 1/3 length of palptibial claw ............... ...................................................... tumpipalpus Meyer & Ueckermann - Palptibia normal .......................................................................... 10 10 Setae sc2 longer than c2; setae f longer than h1; palptibial claw about 3/4 Introduction length of palptarsus .............................. flatichelus Meyer & Ueckermann - Setae sc2 and c2 about equal length; setae f longer or shorter than h1 ....... 11 The genus Willmannella was erected by Feider (1952) with Ottonia phyllophora 11 Medial prodorsum with weaker striae than surrounding area, looking like a Canestrini, 1897 as the type species, which was described from New Guinea and shield ......................................................................................... 12 is also known from Java (Thor & Willmann 1947). Feider (1952) included two - Medial prodorsum with normal striae, not looking like a shield ............. 13 other European species in this genus: Willmannella racovitzai (Feider, 1948), 12 Tibia I with a single baculiform solenidion ....................... conantae Swift originally placed in Microtrombidium (Enemothrombium) Berlese, and - Tibia I with 2 solenidia sharing an alveolus ........................................... Willmannella franzi (Willmann, 1950), originally placed in Campylothrombium ........................................................... parmatus Meyer & Ueckermann 4 Systematic & Applied Acarology Special Publications (1997) 1 LIANG & ZHANG: A new Molothrognathus from Iran 21 Acknowledgements This project was funded by the Natural Science Foundation of Jiangxi Province, China. v1 References v Ehara, S. & Wongsiri, T. (1984) Stigmaeid mites associated with plants in Thailand 2 (Acarina, Stigmaeidae). Kontyu, 52(1), 110-118. sc Fan, Q. H., Chen, Y. & J. Z. Lin (1997) Genus Agistemus, with description of two 1 new species from China. Wuyi Science Journal, 13, 42-47. (in Chinese, with English abstract). ia Hu, S.-Q. & Chen, X.-W (1994) Three new species and a new record of the genus sc 2 c Agistemus from China (Acari: Stigmaeidae). Acta Arachnologia Sinica, 3(1), 2 42-47. (in Chinese, with English abstract). c1 Tseng, Y. H. (1982) Mites of the family Stigmaeidae of Taiwan with key to genera of the world (Acarina: Prostigmata). Phytopathologist & Entomologist of the National Taiwan University, 9, 1-52. Wang, H.-F. (1981) Some predatory mites of Stigmaeidae from chinese orchards. Insect Knowledge,