Valid Names Results
Dysmicoccus walkeri (Newstead, 1891) (Pseudococcidae: Dysmicoccus)Nomenclatural History
- Dactylopius walkeri Newstead 1891: 164. Type data: ENGLAND: Cheshire, Manley, on Agrostis vulgaris. Syntypes, female, Type depository: London: The Natural History Museum, England, UK; accepted valid name
- Pseudococcus walkeri (Newstead, 1891); Fernald 1903b: 112. change of combination
- Pseudococcus kazanskyi Borchsenius 1937: 44. Type data: RUSSIA: Northern Caucasus, Sochi region, along the road from Krasnaya Polyana to Estonka, on grass. Lectotype, female, by subsequent designation (Danzig2009,387). Type depository: St. Petersburg: Zoological Museum, Academy of Science, Russia; junior synonym (discovered by Danzig2009, 387).
- Pseudococcus rectus Borchsenius 1949: 136. Type data: TADZHIKISTAN: Hissar range, environs of Ziddy Vill, on Dactylus glomeratus.. Lectotype, female, by subsequent designation (Danzig2009,387). Type depository: St. Petersburg: Zoological Museum, Academy of Science, Russia; junior synonym (discovered by Danzig1969, 1579).
- Dysmicoccus walkeri (Newstead, 1891); Williams 1962: 21. change of combination
- Dysmicoccus rectus (Borchsenius, 1949); Matesova 1968: 105. change of combination
- Dysmicoccus glandularis Bazarov 1977: 65. Type data: TADZHIKISTAN: Western Pamir, Gorno-Badakhshanskaya, near Lyangar, on Phragmites communis.. Holotype, female, Type depository: St. Petersburg: Zoological Museum, Academy of Science, Russia; junior synonym (discovered by Danzig2009, 387). Illustr.
- Dysmicoccus badachshanicus Nurmamatov 1978: 61. Type data: TADZHIKISTAN: Western Pamir, Vanskii Ridge, near Dzovud, on grasses. Holotype, female, Type depository: St. Petersburg: Zoological Museum, Academy of Science, Russia; junior synonym (discovered by Danzig2009, 387). Illustr.
- Trionymus kazanskyi (Borchsenius, 1937); Tang 1984b: 124. change of combination
- Dysmicoccus kazanskyi (Borchsenius, 1937); Kozár & Walter 1985: 68. change of combination
- Dysnicoccus walkeri; Martin Mateo 1985: 91. misspelling of genus name
- Dysmicoccus pietroi; Danzig & Gavrilov-Zimin 2015: 80. incorrect synonymy
Common Names
- Walker's mealybug KosztaKo1988F
Ecological Associates
Hosts:
Families: 4 | Genera: 23
- Crassulaceae
- Umbilicus rupestris | Foldi2000
- Cyperaceae
- Carex | BenDov1994 KosztaKo1988F
- Ericaceae
- Calluna | BenDov1994 KosztaKo1988F Willia1962
- Poaceae
- Agropyron | BenDov1994 Borchs1939a KosztaKo1988F KozarTrPe1984 Marott1987a
- Agrostis | BenDov1994 Borchs1949
- Agrostis capillaris | BenDov1994 KotejaZa1966 Newste1891 | (= Agrostis vulgaris)
- Arrhenatherum elatius | BenDov1994 Marott1992a
- Brachypodium | BenDov1994 KosztaKo1988F Kozar1999a KozarGuBa1994
- Brachypodium distachyon | BenDov1994 Goux1933a
- Brachypodium pinnatum | BenDov1994
- Brachypodium silvaticum | BenDov1994 KotejaZa1966
- Bromus | BenDov1994 Borchs1949
- Calamagrostis | BenDov1994 Danzig1980b
- Calamagrostis arundinacea | BugajNJuKa2021
- Calamagrostis epigeios | BenDov1994 Danzig1959 Gertss2000 KotejaZa1969
- Dactylis glomerata | BenDov1994 Borchs1949 Goux1933a Mateso1968
- Elymus repens | BenDov1994 Goux1933a Seljak2010 | (= Agropyron repens)
- Festuca ovina | BenDov1994 Marott1992a
- Festuca rubra | BugajNJuKa2021
- Holcus lanatus | BenDov1994 Goux1933a
- Hordeum | BenDov1994 Green1927
- Leymus innovatus | BenDov1994 Danzig1980b | (= Elymus mollis)
- Lolium | BatsanKaKi2017
- Molinia caerulea | BenDov1994 KotejaZa1983
- Oryzopsis | Bazaro1971c BenDov1994
- Phragmites | GomezM1957 Martin1985
- Phragmites australis | Bazaro1977 BenDov1994 Mateso1968 Tang1992 | (= Phragmites communis)
- Piptatherum miliaceum | BenDov1994 Goux1933a | (= Piptatherum multiflorum)
- Poa | BenDov1994 Danzig1980b KosztaKo1988F
- Poa nemoralis | BenDov1994 Borchs1949 | (= Agrostis alba)
- Poaceae | BenDov1994 Borchs1937 Tang1984b Tang1992 TangHaTa1992
- Sasa veitchii | Tanaka2017a
Geographic Distribution
Countries: 18
- Azerbaijan | BenDov1994 Borchs1937 Borchs1949
- China | BenDov1994 Tang1984b Tang1992 TangHaTa1992
- France | BenDov1994 Foldi2000 Foldi2001 Goux1933a
- Germany | BenDov1994 Schmut1952 Schmut1980
- Hungary | KozarKiSa2004 KozarKoSc1999
- Iran | MoghadWa2022
- Ireland | Green1934d OConnoGeMa2013
- Italy | BenDov1994 KozarTrPe1984 LongoMaPe1995 Marott1987a Marott1992a
- Kazakhstan | BenDov1994 Mateso1968
- Mongolia | BenDov1994 Danzig1969 Danzig1974
- Poland | BenDov1994 GolanLaJa2001 Koteja1974b KotejaZa1966 KotejaZa1979
- Russia
- Krasnodar Kray | BenDov1994 Borchs1939a
- Kuril Islands | BenDov1994 Danzig1980b
- Primor'ye Kray | BenDov1994 Danzig1980b
- Sakhalin Oblast | BenDov1994 Danzig1980b
- St. Petersburg (=Leningrad) Oblast | BenDov1994 Danzig1959 Danzig1980b
- Slovenia | BenDov1994 Kozar1983a Seljak2010
- Spain | GomezM1957 Martin1985
- Sweden | Gertss2000 Gertss2001 Gertss2005a
- Switzerland | BenDov1994 KozarGuBa1994
- Tajikistan (=Tadzhikistan) | Bazaro1971c Bazaro1977 BenDov1994 Borchs1949 Nurmam1978
- United Kingdom
- Channel Islands | BenDov1994 Willia1962
- England | BenDov1994 Newste1891 Willia1962
- Scotland | BenDov1994 Willia1962
- Wales | BenDov1994 Willia1962
Keys
- ZhangWaWa2023: pp.129 ( Adult (F) ) [Dysmicoccus species in China]
- MoghadWa2022: pp.42 ( Adult (F) ) [Dysmicoccus in Iran]
- TanakaSaCh2022: pp.309 ( Adult (F) ) [Dysmicoccus species in Japan]
- TanakaKa2021: pp.577-578 ( Adult (F) ) [Dysmicoccus in Japan]
- Tanaka2017a: pp.419 ( Adult (F) ) [Japanese species of Dysmicoccus]
- DanzigGa2015: pp.70-71 ( Adult (F) ) [Palaearctic Dysmicoccus species]
- RussoMa1997a: pp.154-155 ( Adult (F) ) [Dysmicoccus species of Italy]
- Tang1992: pp.192, 193 ( Adult (F) ) [Palaearctic & Oriental regions]
- Danzig1988: pp.703 ( Adult (F) ) [Far East of Russia]
- KotejaLa1986: pp.382 ( Adult (F) ) [Palaearctic region]
- Borchs1949: pp.95 ( Adult (F) ) [Palaearctic region]
Remarks
- Systematics: The number of multilocular pores and tubular ducts is greater in females collected in the eastern part of the species distribution. In addition to pore and duct number, the size of cerarian conical setae often varies. Based on series of D. walkeri from Sochi with and without a circulus and the type series of D. rectus, Danzig & Gavrilov-Zimin (2015) determined that the intraspecific variation of this character does not define distinct species, but indicates a continuum. Therefore, they confirmed the previous synonymization of D. kazanskyi, D. rectus, D. gladularis and D. badachschanicus by Danzig (2009). They also added D. pietroi as a junior synonym, stating that they could find no differences in the original description and figure by Marotta except for the absence of a circulus. However, until the type specimens of D. pietroi have been compared with those of D. walkeri, we have decided to keep these species separate in ScaleNet.
- Structure: Living adult female body elongate oval, about 2.5–4.0 mm long and 1.0–1.7 mm wide, with segmentation distinct. Antennae and legs pale yellow-brown, covered with dense white powdery wax; cottony wax appendages on margins stout, with the posteriormost six longer and stouter than the others, the penultimate pair longest (as long as body width) and very stout (Williams 1962). Adult female of Dysmicoccus walkeri from Japan. Body elongate oval, derm membranous, about 2.5–4.0 mm long and 1.0–1.7 mm wide; segmentation distinct. Anal lobe distinct, each ventral surface with a weakly sclerotized area and a long apical seta 181– 210 μm. Antennae with 8 segments and many long hair-like setae; with 3 fleshy setae on apical segments and a fleshy setae on subapical segments. Legs well-developed, with many long setae. (Tanaka, 2017a)
- Biology: Occurring on the leaves and in leaf sheaths. Life history discussed by Kosztarab & Kozár (1988F).
- General Remarks: Description and illustration of adult female by Sulc (1937), Borchsenius (1949), Williams (1962), Bazarov (1977), Nurmamatov (1978), Danzig (1980b), Kosztarab & Kozár (1988F), Marotta (1992a), Tang (1992).
Illustrations
Citations
- BatsanKaKi2017: distribution, host, 263
- Bazaro1971c: distribution, host, 88
- Bazaro1977: description, distribution, host, illustration, taxonomy, 65-67
- BenDov1994: catalog, 121,130,133,145
- Borchs1937: description, distribution, host, illustration, taxonomy, 43-45
- Borchs1939a: description, distribution, host, taxonomy, 49, 50
- Borchs1949: description, distribution, host, taxonomy, 134-137
- BugajNJuKa2021: distribution, host, list, 307
- Cocker1897: taxonomy, 201
- Danzig1959: distribution, host, 444
- Danzig1969: distribution, host, 1579
- Danzig1974: distribution, host, 68
- Danzig1980b: description, distribution, host, illustration, taxonomy, 171, 173, 174
- Danzig2009: taxonomy, 386-390
- DanzigGa2015: description, distribution, illustration, key, taxonomy, 80-85
- Fernal1903b: 112
- Foldi2000: distribution, host, 78
- Foldi2001: distribution, 303-308
- FoldiGe2018: distribution, list, 12
- Gertss2000: distribution, host, 149
- Gertss2001: distribution, 123-130
- Gertss2005a: distribution, host, 36-37
- GolanLaJa2001: distribution, host, taxonomy, 229-249
- GomezM1957: description, distribution, host, illustration, taxonomy, 63-68
- Goux1933a: distribution, host, 235
- Green1916: distribution, host, 31
- Green1920: taxonomy, 122
- Green1925b: distribution, host, 517
- Green1926a: distribution, host, 183
- Green1928a: distribution, host, 30
- KosztaKo1988F: description, distribution, host, illustration, taxonomy, 94-95
- Koteja1974b: distribution, taxonomy, 74, 99
- KotejaZa1979: distribution, host, 672
- KotejaZa1983: distribution, host, 474
- Kozar1983a: distribution, host, 142
- Kozar1999a: distribution, host, 138
- KozarGuBa1994: distribution, host, 153
- KozarKiSa2004: distribution, 57
- KozarKoSc1999: distribution, host, 111-114
- KozarTrPe1984: distribution, host, 4
- KozarWa1985: catalog, taxonomy, 68
- LagowsGo2020: distribution, 70
- LongoMaPe1995: distribution, 118
- MalumpBa2012: distribution, 19
- Marott1987a: distribution, host, 109
- Marott1992a: description, distribution, host, illustration, taxonomy, 75, 76
- Martin1985: description, distribution, host, illustration, taxonomy, 91
- Mateso1968: distribution, host, 105
- MatilePe2002: distribution, host, 351
- MoghadWa2022: diagnosis, distribution, host, illustration, key, 10, 42, 48-49, 50, 145
- Newste1891: description, distribution, host, taxonomy, 164
- Nurmam1978: description, distribution, host, illustration, life history, taxonomy, 61, 62
- OConnoGeMa2013: distribution, host, 42
- RussoMa1997a: taxonomy, 154-155
- Schmut1952: description, distribution, host, taxonomy, 388
- Schmut1980: taxonomy, 50
- SchmutHo2016: distribution, host, 22-23
- Seljak2010: distribution, host, 101
- SimonKa2011: distribution, 235
- Sulc1937a: description, distribution, host, illustration, taxonomy, 86-92
- Tanaka2017a: description, distribution, illustration, key, morphology, 417–420
- TanakaKa2021: key, 577
- TanakaSaCh2022: key, 309
- Tang1984b: distribution, host, 124
- Tang1992: description, distribution, host, taxonomy, 199-207
- TangHaTa1992: distribution, host, 4
- TranfaMa1988: distribution, host, taxonomy, 611-614
- Willia1962: description, distribution, host, illustration, taxonomy, 21-23
- Willia2017a: catalog, list of species, 251
- WilliaBe2015: taxonomy, 168
- WilliaMa2012: distribution, 83
- ZhangWaWa2023: key, 129
