Valid Names Results

Trionymus thulensis Green, 1931 (Pseudococcidae: Trionymus)

Nomenclatural History

• Trionymus pulverarius; Green 1926: 182. misidentification
• Trionymus thulensis Green 1931: 267. Type data: ICELAND: Varmahlio, on Festuca rubra. Syntypes, female, Type depository: London: The Natural History Museum, England, UK; accepted valid name
• Erium thulense (Green, 1931); Lindinger 1935a: 122. change of combination
• Pseudococcus thulensis (Green, 1931); Ossiannilsson 1955: 6. change of combination
• Trionymus thulensis Green, 1931; Williams, D.J. 1962: 69-72. revived combination (previously published)

Common Names

• northern mealybug KosztaKo1988F

Ecological Associates

Hosts:

Families: 3 | Genera: 16

Associates:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• YerlikBaKa2021: pp.326-327 ( Adult (F) ) [Trionymus of the Palearctic region]
• Hodgso2020: pp.32-34 ( Adult (M) ) [higher groups of Pseudococcidae]
• DanzigGa2015: pp.99-106 ( Adult (F) ) [Palaearctic Trionymus species]
• Hodgso2005: pp.3-4 ( Adult (M) ) [Coccoidea species of Greenland]
• Tang1992: pp.152 ( Adult (F) ) [Palaearctic region]
• KosztaKo1988F: pp.158 ( Adult (F) ) [Central Europe]
• Willia1962: pp.59 ( Adult (F) ) [Great Britain]

Remarks

• Structure: Female body elongate-oval, up to 4 mm long. antennae 7-8 segmented. Legs well developed; hind coxae with translucent pores. Anal apparatus complete. Both pairs of ostioles present, poorly developed. Circulus very small, oval. Multilocular porese forming transverse rows and bands on five posterior abdominal sternites and occasionally present on ventral surface of head. (Danzig & Gavrilov-Zimin, 2015)
• Biology: Occurring at the base of grasses and in nests of ants Ponera contracta.
• General Remarks: Description and illustration of adult female by Williams (1962) and by Tang (1992). Description and illustration of adult male by Hodgson (2005). Description of adult female by Kosztarab & Kozár (1988F).

Illustrations

Citations