Valid Names Results

Trionymus latvicus is now Trionymus radicum (Danzig, 1986) (Pseudococcidae: Trionymus)

Nomenclatural History

• Dactylopius radicum Newstead 1895b: 235. Type data: WALES: Anglesey, Puffin Island, on roots of sea pink, Armeria vulgaris and on grass.. Syntypes, female, Type depository: London: The Natural History Museum, England, UK; Washington: United States National Entomological Collection, U.S. National Museum of Natural History, District of Columbia, USA; accepted valid name Illustr.
• Ripersia donisthorpei Newstead in Donisthorpe 1907: 5. Type data: ENGLAND: Kent, Charing, in nest of Ponera contracta. Holotype, female, Type depository: London: The Natural History Museum, England, UK; junior synonym (discovered by Willia1962, 69).
• Ripersia cinti Balachowsky 1933a: 44. Type data: FRANCE: Corsica, Cinto, on Trisetum flavescer subsp. pratense. Holotype, female, Type depository: Marseille: Collection of L. Goux, France; junior synonym (discovered by DanzigGa2015, 181). Illustr.
• Ripersia (Cintococcus) cinti; Goux 1940: 61. subsequent use
• Trionymus pilosus Goux 1941a: 35. Type data: FRANCE: Champs, near Colmars, Basses-Alpes, on grass. Holotype, female, by subsequent designation Type depository: Paris: Museum National d'Histoire naturelle, France; junior synonym (discovered by DanzigGa2015, 181). Illustr.
• Pseudococcus ferganensis Borchsenius 1949: 155. Type data: KYRGYZSTAN: Fergana Range, bank of Kugartka River, on Calamagrostis sp.. Lectotype, female, by subsequent designation (Danzig1997a,105). Type depository: St. Petersburg: Zoological Museum, Academy of Science, Russia; junior synonym (discovered by DanzigGa2015, 181).
• Trionymus singularis Schmutterer 1952a: 560. Type data: GERMANY: Uttenreuth, near Erlangen, on Poa pratensis. Holotype, female, by original designation Type depository: Wetlenberg: The Schmutterer Collection, Germany; junior synonym (discovered by DanzigGa2015, 181). Illustr.
• Trionymus radicum (Newstead, 1895); Williams 1962: 69. change of combination
• Pseudococcus latvicus Rasina 1966: 10. Type data: LATVIA: Sloka, on grass. Holotype, female, by original designation Type depository: London: The Natural History Museum, England, UK; Riga: Latvian National Museum of Natural History, Latvia; St. Petersburg: Zoological Museum, Academy of Science, Russia; junior synonym (discovered by DanzigGa2015, 181).
• Trionymus ferganensis (Borchsenius, 1949); Ter-Grigorian 1973: 62. change of combination
• Trionymus insularis Danzig 1983: 520. Type data: RUSSIA: Kurile Islands, Sernovodsk, on Calamagrostis sp.. Holotype, female, Type depository: St. Petersburg: Zoological Museum, Academy of Science, Russia; junior homonym Notes: Junior homonym of Trionymus insularis Ehrhorn, 1916 Illustr.
• Cintococcus cinti (Balachowsky, 1933); Kozár & Walter 1985: 68. change of combination
• Trionymus latvicus (Rasina, 1966); Kozár & Walter 1985: 73. change of combination
• Trionymus racicum (Newstead, 1895); Kozár & Walter 1986: 115. misspelling of species epithet
• Trionymus kurilensis Danzig 1986b: 75. replacement name Replacement name for Trionnymus insularis Danzig, 1983
• Balanococcus radicum (Newstead, 1895); Tang 1992: 134. change of combination
• Trionymus radicum (Newstead, 1895); Ben-Dov 1994: 527. revived combination (previously published)
• Balanococcus singularis (Schmutterer, 1952); Danzig 1998a: 154. change of combination

Common Names

• solitary mealybug KosztaKo1988F
• thrift root mealybug KosztaKo1988F

Ecological Associates

Hosts:

Families: 1 | Genera: 14

Associates:

Families: 2 | Genera: 2

Geographic Distribution

Keys

• YerlikBaKa2021: pp.326-327 ( Adult (F) ) [Trionymus of the Palearctic region]
• DanzigGa2015: pp.99-106 ( Adult (F) ) [Palaearctic Trionymus species]
• KwonDaPa2003a: pp.415 ( Adult (F) ) [Trionymus species of Korea]
• Danzig1998a: pp.154 ( Adult (F) ) [Russia] Key as: Balanococcus singularis
• Danzig1997a: pp.96 ( Adult (F) ) [Palaearctic region] Key as: Trionymus ferganensis
• Danzig1997a: pp.96 ( Adult (F) ) [Palaearctic region] Key as: Trionymus kurilensis
• Tang1992: pp.152 ( Adult (F) ) [Palaearctic region] Key as: Balanococcus singularis
• Tang1992: pp.152 ( Adult (F) ) [Palaearctic region] Key as: Trionymus ferganensis
• Tang1992: pp.153 ( Adult (F) ) [Palaearctic region] Key as: Trionymus kurilensis
• Tang1992: pp.128 ( Adult (F) ) [Palaearctic & Oriental regions]
• KosztaKo1988F: pp.158 ( Adult (F) ) [Central Europe] Key as: Balanococcus singularis
• KosztaKo1988F: pp.159 ( Adult (F) ) [Central Europe ]
• Willia1962: pp.59 ( Adult (F) ) [Great Britain]
• Borchs1949: pp.96 ( Adult (F) ) [Palaearctic region] Key as: Trionymus ferganensis

Remarks

• Systematics: Syntype of Ripersia cinti Balachowsky, 1933 and holotype of Trionymus pilosus Goux, 1941 differ from the usual females of T. radicum in having a smaller number of multilocular pores and more numerous, thick flagellate setae on both sides of the body. the same characters were found on females from Switzerland. All 3 of these were collected in high mountains, above 2000 m. Danzig and Gavrilov-Zimin, 2015 considered this variation in characters to be ecological and so they considered both R. cinti and T. pilosus as alpine forms of T. radicum. Pseudococcus ferganensis, T. singularis and T. kurilensis (=T. insularis) differ from the usual T. radicum in having a smaller number of dorsal tubular ducts and more numerous multilocular pores in the marginal zone of the venter, but Danzig and Gavrilov-Zimin considered these characters to be within the normal variation of the species. Although the type material has been lost, they also determined that according to the original description and figure of Pseudococcus latvicus, this species does not differ from T. radicum.
• Structure: Female body elongate-oval, up to 3.5 mm long. Antennae 6-7 segmented. Legs normally developed; hind coxae with numerous translucent pores. Anal apparatus complete. Both pairs of ostioles present. Circulus usually one, very small, but sometimes two small circuli present. Multilocular pores forming transverse rows and bands on V-VIII abdominal sternites, present along the margin of the venter and rarely present on abdominal tergites. (Danzig & Gavrilov-Zimin, 2015)
• Biology: Occurring at the base of grasses and in nests of ants, Ponera contracta and Lasius niger.
• General Remarks: Description and illustration of adult female by Williams (1962) and by Kwon et al. (2003a). Good description and illustration of the adult female of the junior synonym, Trionymus pilosus given by Goux (1941a). Good description and illustration of the adult female junior synonym, Balanococcus singularis given by Schmutterer (1952a), Kosztarab & Kozár (1988F) and by Tang (1992). Danzig & Gavrilov-Zimin (2015) noted that the earlier report T. radicum from Bulgaria (Gavrilov & Trapeznikova, 2010) had been based on a misidentification of T. hamberdi. Good description and illustration of the adult female given by Danzig (1983) as Trinonymus insularis Danzig. Good description of the adult female given by Tang (1992).

Illustrations

Citations