Valid Names Results

Trionymus diminutus (Leonardi, 1918) (Pseudococcidae: Trionymus)

Nomenclatural History

• Dactylopius calceolariae; Maskell 1884: 138. misidentification
• Pseudococcus diminutus Leonardi 1918: 198. Type data: ITALY: Bordighera (Liguria), on Phormium sp.. Lectotype, female, by subsequent designation (Marott1992,69). Type depository: Portici: Dipartimento de Entomologia e Zoologia Agraria di Portici, Universita di Napoli Federico II, Italy; accepted valid name Illustr.
• Trionymus calceolariae; Ferris 1918d: 67. misidentification
• Trionymus diminutus (Leonardi, 1918); Morrison 1925a: 495. change of combination
• Erium diminutum (Leonardi, 1918); Lindinger 1935a: 122. change of combination
• Balanococcus diminutus (Leonardi, 1918); Cox 1987: 28. change of combination
• Trionymus diminutus (Leonardi, 1918); Danzig & Gavrilov-Zimin 2015: 131-133. revived combination (previously published)

Common Names

• New Zealand flax mealybug McKenz1967

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Foes:

Families: 1 | Genera: 3

Geographic Distribution

Keys

• YerlikBaKa2021: pp.326-327 ( Adult (F) ) [Trionymus of the Palearctic region]
• DanzigGa2015: pp.99-106 ( Adult (F) ) [Palaearctic Trionymus species]
• Tang1992: pp.153 ( Adult (F) ) [Palaearctic region]
• Cox1987: pp.20 ( Adult (F) ) [New Zealand] Key as: Balanococcus diminutus
• Willia1985: pp.366 ( Adult (F) ) [Australia]
• MillerMc1973: pp.532 ( Adult (F) ) [North America]
• McKenz1967: pp.461 ( Adult (F) ) [U.S.A., California]
• Willia1962: pp.61 ( Adult (F) ) []
• McKenz1961: pp.48 ( Adult (F) ) [North America]
• McKenz1960: pp.765 ( Adult (F) ) [North America ]
• Ferris1953a: pp.483 ( Adult (F) ) [North America]
• Ferris1950b: pp.252 ( Adult (F) ) [North America]
• Borchs1949: pp.96 ( Adult (F) ) [Palaearctic region]

Remarks

• Systematics: Danzig & Gavrilov-Zimin provided a new generic concept of Balanococcus, regarding the grouping of trilocular pores near the midline of the body to be an important and unique character. This was in agreement with Williams (2004), but eliminated Balanococcus as a genus. Since they determined that this species could not belong in the genus Pseudococcus, they transferred it to Trionymus. The records of this species from Formosa by Takahashi (1928a, 1928b) probably refer to Dysmicoccus boninsis.
• Structure: Colour photograph of adult female by Matile-Ferrero et al. (2004). Female body broadly oval, up to 6 mm long, pink in life. Antennae 8-segmented. Legs normally developed; hind coxae with translucent pores. Anal apparatus complete. Both pairs of ostioles well developed. Circulus large, rounded. (Danzig & Gavrilov-Zimin, 2015)
• Economic Importance: Natural enemies listed by Borchsenius (1949). In the United Kingdom, it is always found on New Zealand Flax (Phormium tenax, Xanthorrhoeaceae) and is occasionally a highly damaging pest, even killing plants (Williams & Malumphy, 2012).
• General Remarks: Good description and illustration of the adult female given by Leonardi (1920), Morrison (1925), Ferris (1950b), McKenzie (1967) and by Cox (1987).Good description of the adult female given by Borchsenius (1949) and by Tang (1992).

Illustrations

Citations

• BatsanKaKi2017: distribution, host, 263
• BenDov1994: 58
• Borchs1937a: description, distribution, host, illustration, taxonomy, 165, 166
• Borchs1949: biological control, description, distribution, host, illustration, taxonomy, 150-152
• Britti1938: description, distribution, host, taxonomy, 342, 343
• ChenWoWu2012: distribution, taxonomy, 299
• Cox1987: description, distribution, host, illustration, taxonomy, 28, 29, 128
• Danzig1998a: distribution, host, taxonomy, 160
• DanzigGa2014: illustration, 13
• DowellGiJe2016: distribution, 118
• DownieGu2004: distribution, host, molecular data, phylogeny, 258-259
• ErensoBlGo2023: phylogeny, 4
• Ferris1950b: description, distribution, host, illustration, taxonomy, 261-262
• Foldi2001: distribution, 303-308
• FoldiGe2018: distribution, list, 12
• HardyGuHo2008: molecular data, phylogeny, taxonomy, 51-71
• JansenAl2023: dispersal, host, 31,36
• Kiritc1936: distribution, host, 75
• KondoWa2022a: distribution, host, list, 25
• LaflinGuPa2004: distribution, host, 475-477
• Leonar1918: description, distribution, host, illustration, taxonomy, 198-201
• Leonar1920: description, distribution, host, illustration, taxonomy, 397-399
• Lindin1935a: taxonomy, 122
• LongoMaPe1995: distribution, 117
• MalumpBa2012: distribution, economic importance, host, 18,38
• MalumpHa2012: distribution, host, 195
• MalumpSa2014: distribution, 23
• Marott1987a: distribution, host, 113
• Marott1992a: distribution, host, taxonomy, 69
• MatileGePi2004: distribution, host, 35-37
• McKenz1967: description, distribution, host, illustration, taxonomy, 465, 466
• Morris1925a: description, distribution, host, illustration, taxonomy, 495, 496
• OConnoGeMa2013: distribution, host, 42
• PalmaJBl2016: distribution, host, phylogeny, 127-128, 130
• Poutie1922: biological control, 3-28
• RenAsHu2017: DNA, phylogeny, 4, 6
• RossWa2024: DNA sequencing, genome,
• SongWaTa2024: phylogeny, 4, 8-9
• Tang1992: description, distribution, host, taxonomy, 161
• Tang2001: distribution, 3
• TangHaTa1992: distribution, host, 3
• Tao1999: distribution, host, taxonomy, 30
• Whiteh1999: distribution, host, 187-188
• Willia1962: distribution, host, 61
• Willia1985: distribution, host, taxonomy, 370-371
• Willia2017a: catalog, list of species, 246
• WilliaMa2012: distribution, illustration, 83,84,85-86
• YerlikBaKa2021: key, 326