Valid Names Results

Trionymus copiosus (Borchsenius, 1949) (Pseudococcidae: Trionymus)

Nomenclatural History

• Pseudococcus copiosus Borchsenius 1949: 156. Type data: TADZHIKISTAN: Near Nau, on leaves of Alopecurus sp.. Lectotype, female, by subsequent designation (Danzig1997a,98). Type depository: St. Petersburg: Zoological Museum, Academy of Science, Russia; accepted valid name
• Trionymus copiosus (Borchsenius, 1949); Trjapitzin 1989: 132. change of combination

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 2

Foes:

Families: 1 | Genera: 5

Geographic Distribution

Keys

• YerlikBaKa2021: pp.326-327 ( Adult (F) ) [Trionymus of the Palearctic region]
• DanzigGa2015: pp.99-106 ( Adult (F) ) [Palaearctic Trionymus species]
• Danzig1997a: pp.96 ( Adult (F) ) [Palaearctic region]
• Tang1992: pp.152 ( Adult (F) ) [Palaearctic region]
• Borchs1949: pp.96 ( Adult (F) ) [Palaearctic region] Key as: Pseudococcus copiosus

Remarks

• Systematics: The comprehensive book of Danzig and Gavrilov (2015) examines many of the character systems that have become standard in certain taxonomic analyses worldwide. Some of their conclusions are in direct contrast to the general thinking of past coccidologists. They question the utility of such characters as the presence or absence of the anal bar, the cluster of multilocular pores and tubular ducts on the margin of the prothorax, the number of cerarii, the presence of auxiliary setae in the cerarii, the presence of black pigments in the body. Because of their different interpretation of the character systems, there are a number of fairly extensive synonymies. Although they have presented their rationales for making these changes, we hesitate to accept all of them without more definitive information. It would be highly useful to have integrated morphological and molecular analyses before implementing synonymies. Practically, once species have been synonymized, the information and literature about each synonym becomes more and more difficult to trace over time. Thus, it is important to be as certain as possible about synonymy actions.

  Danzig & Gavrilov-Zimin (2015) stated that Trionymus turgidus differed from the types of T. copiosus only in the presence of a small circulus. They did not consider this character enough for the species separation in view of the individual variablilty that they found in different mealybugs including other species of Trionymus.

• Structure: Female body elongate-oval, up to 4 mm long, pink in life. Antennae 6-7 segmented. Legs with thin segments; hind coxae with translucent pores. Anal apparatus complete. Specimens collected from Phragmites in Turkmenistan and Tadjikistan usually have more numerous multilocular pores along the margin of the cephalothorax than specimens from other grasses. (Danzig & Gavrilov-Zimin, 2015)
• Economic Importance: Parasites in the Palaearctic region discussed by Trjapitzin (1989).
• General Remarks: Good description and illustration of the adult female given by Danzig (1997a). Good description of the adult female given by Borchsenius (1949) and by Tang (1992).

Illustrations

Citations