Eotetranychus sexmaculatus
Creators: name: Beard, Jennifer J.
name: Beaulieu, Frédéric
name: Knee, Wayne
name: Gotoh, Tetsuo
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Tetranychidae
Eotetranychus
Eotetranychus sexmaculatus

description: Eotetranychus sexmaculatus (Riley 1890)
(Figs 4–14)
Tetranychus 6-maculatus Riley 1890: 226.
Tetranychus sexmaculatus Riley. — Banks 1900: 75; McGregor 1919: 659; McGregor 1950: 301.
Eotetranychus sexmaculatus (Riley).— Pritchard & Baker 1955: 202; Ehara 1956: 142; Ehara 1966: 8; Gupta & Gupta 1994: 81.
Eotetranychus asiaticus Ehara 1966: 8. Synonymy by Ehara 1973: 8.
AUSTRALIA (total examined: 30 females, 18 males): 5 F, 2 M, ex avocado leaves Persea americana (Lauraceae), Pemberton, Western Australia, on seedlings imported from Birdwood Nursery, Woombye, Queensland, 16.viii.1986, S. Learmonth (det. E.W. Baker 1986); 1 M, ex avocado leaves, Pemberton, Western Australia, on seedlings imported from Birdwood Nursery, Woombye, Queensland, 4.ix.1986, G. Waite & D. Smith (USNM); 8 F, 4 M, ex avocado leaves, Birdwood Nursery, Woombye, Queensland, 4.ix.1986, G. Waite & D. Smith (det. E.W. Baker 1986); 5 F, 1 M, ex avocado leaves, Airville, 15 km southwest Ayr, Queensland, 10.ix.1986, I. Kaye & J. Rahder; 3 F, 4 M, ex grape leaves Vitis vinifera (Vitaceae), Western Australia, 6.vi.2006, S. Learmonth; 2 F, 2 M, ex grape leaves V. vinifera, Resolution Vineyard, 4 Sunnybanks Rd, Middleton, Tasmania, 17.iii.2015, P. Brown; 7 F, 4 M, ex avocado leaves, Pemberton, Western Australia, 10.iv.2018, S. Learmonth; 6 F, 4 M, ex avocado leaves, Pemberton, Western Australia, 03.ix.2021, A. Mathews. Unless otherwise indicated, all material in QM.
CHINA: 5 F, 3 M, ex kiwifruit leaves Actinidia deliciosa (Actinidiaceae), collected in quarantine in New Zealand, det. S.J. Bennet 10.i.2007 (PHEL Ref. 09/2007/75) (NZAC).
TAIWAN: 4 F, 1 M, ex Citrus (J. Burman) (jun. syn. “ C. grandis ” (L.) indicated on slide), Taipei, 18.vi.1951, T.C. Maa (Lot #51-7165; CNC - CNC 396823, CNC 396824).
JAPAN (total examined: 19 females, 14 males): 11 F, 6 M, ex Ficus erecta Thunb. (Moraceae), Tomigusuku, Okinawa, 22.iv.1966, K. Miyara (HUM — E. asiaticus paratypes); 4 F, 4 M, ex culture, originally collected from Ficus virgata Reinw. Ex Blume, Tomigusuku, Okinawa, 26°09′29 ʺN 127°39′31 ʺE, 20.x.2021, T. Gotoh (QM); 4 F, 4 M, ex culture, originally collected from F. virgata, Naha, Okinawa, 26°13′36 ʺN 127°42′50 ʺE, 20.x.2021, T. Gotoh (QM).
NEW ZEALAND (total examined: 13 females, 17 males): 2 F, 1 M, on black locust leaves Robinia pseudoacacia (Fabaceae), Te Kauwhata, 26.ii.1963, D.C.M. Manson; 4 F, 8 M, on Palamino grape leaves, Te Kauwhata, 19.iii.1965, P.F. Hitchcock; 2 F, 5 M, on grape leaves, Henderson, 31.iii.1965, A. McKissock; 2 M, ex grape leaves, Corbans Vineyard, Henderson, 30.iii.1967, from P.D.D.; 5 F, 1 M, ex avocado leaves, B.P. No. 3 Road, Te Puke, Grahame Ross Farm, 19.iii.1984, P.A. Brown; 3 F, 3 M, ex Hass avocado leaves (P. americana), Poroti, 08.iv.2021, 35°44’22.5882” S 174°08’38.9034” E, E. Barraclough (QM); 3 F, 3 M, ex Hass avocado leaves, Te Puke, 37°49’15.9312” S 176°18’58.6548” E, 14.iv.2021, E. Barraclough (QM). Unless otherwise indicated, all material in NZAC.
UNITED STATES OF AMERICA (total examined: 32 females, 36 males): USNM:1 M, ex orange Citrus sinensis (Rutaceae), Eloise Loop, Florida, 17.xi.1949, L.C. Knorr (#5874, Lot 50-1); 1 M, ex lemon, Ventura, California, 20. x.1951, L.R. Jeppson; 1 F, 1 M, ex avocado (Lauraceae), Morrow [Morro] Bay, California, 3.iv.1986, J.M. McMurtry. FSCA: 1 F, 2 M, ex Citrus X paradisi, Sanford, Florida, 29.iv.1980, T.L. Kipp; 1 F, 2 M, ex Citrus sinensis, Immokalee, Florida, 21.i.1981, K. Delate; 1 F, 1 M, ex Citrus X paradisi, Miami, Florida, 20.iv.1981, N. Focaracci; 1 F, 3 M, ex Citrus limon, N. W. Miami, Florida, 13.ix.1988, Vadaie & Storch; 2 F, 2 M, ex Citrus aurantium, DeLand, Volusia County, Florida, 12.vii.1995, J. Beckwith; 1 F, 2 M, 2 deutonymphs, 2 protonymphs, Citrus X paradisi, Mims, Brevard County, Florida, 22.iv.1997, K. Garrett-Kraus (E1997-001660-001); 4 F, 3 M, ex Citrus sp., Dunnellon, Citrus County, 17.v.2006, S. White (E-2006-2785); 4 F, 1 M, ex Citrus sp., Trenton, Gilchrist County, Florida, 3.v.2013, P. Carbon (E-2013-2915); 1 F, 2 M, ex Citrus sp., Live Oak, Suwannee County, Florida, 10.i.2014, W. Wayne Bailey (E-2014-152); 5 F, 5 M, ex X Citroncirus sp. (Rutaceae), Gainesville, Alachua County, Florida, 12.xii.2014, P. Carbon (E-2014-8144); 2 F, 1 M, ex Citrus reticulata, Waldo, Alachua County, Florida, 28.ii.2019, S. Hart (E-2019-831). UHIM: 1 M, ex avocado leaves, Waipio, Oahu, Hawai’i, 10.viii.1955, F.H. Haramoto (UHIM 2013.16574); 2 F, 1 M, ex leaves of flowering plum, Kalihi, Honolulu, Hawai’i, 20.vi.1960, F.H. Haramoto (UHIM 2013.16570, UHIM 2013.16575); 3 F, 2 M, ex guava leaves Psidium guajava (Myrtaceae), Manoa, Oahu, Hawai’i, 23.viii.1965, F.H. Haramoto (UHIM 2013.16565-66, UHIM 2013.16573); 1 F, 2 M, ex guava leaves, Waimanala, Hawai’i, 15.vii.1968, H. Nakasane (UHIM 2013.16568, UHIM 2013.16571-72); 2 F, 3 M, ex sacred bamboo leaves Nandina sp. (Berberidaceae), Honolulu, Oahu, Hawai’i, 18.ii.1972, M. Topham (UHIM 2013.16567, UHIM 2013.16569, UHIM 2013.16576).
Diagnosis. Both sexes: Dorsal setae long, mostly 60–90 μm (in female) except h1 usually shorter (~40–60). Opisthosomal striae generally transverse (becoming longitudinal in lateral regions), with small rounded lobes in female. Peritremes with a short distal bend, resembling a golf club (when short) to a field hockey stick (when slightly longer) in shape. Female: Palptarsus with stout spinneret suζ, about 1.3–1.7 x as long (5.5–6.5 μm) as wide (3.5–4.5 μm); pregenital region with longitudinal and entire (uninterrupted) striae, extending a short distance onto anterior region of genital flap to level with setae g1 and becoming strongly oblique lateral to g1; followed posteriorly by a band of transverse striae in middle region of genital flap, and a narrow band of longitudinal and or arching striae along posterior margin of genital flap. Tarsus I usually with five tactile setae proximal to proximal duplex setae, including three dorsolaterally (l′1, lʺ1, l′2) (usually four tactile setae proximal in male, including two dorsolaterally); tibia II with eight setae; tibia IV with seven setae; femur IV with only three setae, lacking seta d, seta l′1 inserted midway on dorsolateral aspect. Male: Aedeagus more or less linear, abruptly narrowed and bent posteroventrally near midway, forming a narrow weakly tapering (almost parallel-sided) finger, ending in an obliquely truncate tip (a minute ventral point sometimes visible on the tip). Palptarsus with small spinneret suζ, approximately 1.0–1.3 x as long (1.5–1.9 μm) as wide (1.3–1.7 μm).
description: Published as part of Beard, Jennifer J., Beaulieu, Frédéric, Knee, Wayne & Gotoh, Tetsuo, 2024, The six-spotted spider mite, Eotetranychus sexmaculatus (Riley) (Trombidiformes: Tetranychidae) in Australia, New Zealand, Japan and USA: a revised morphological and molecular-based concept, synonyms, and related species, pp. 349-378 in Zootaxa 5432 (3) on pages 358-360, DOI: 10.11646/zootaxa.5432.3.2, http://zenodo.org/record/10906539