Valid Names Results

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

Nomenclatural History

• Ripersia phragmitis; Borchsenius 1939a: 43. misidentification (discovered by Danzig1997a, 109).
• Pseudococcus turgidus Borchsenius 1949: 148. Type data: AZERBAIJAN: Geokchai District, on Phragmites sp.. Lectotype, female, by subsequent designation (Danzig1997a,109). Type depository: St. Petersburg: Zoological Museum, Academy of Science, Russia; accepted valid name
• Trionymus turgidus (Borchsenius, 1949); Kozár & Walter 1985: 73. change of combination

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• Danzig1997a: pp.96 ( Adult (F) ) [Palaearctic region]
• Tang1992: pp.150 ( Adult (F) ) [Palaearctic region]
• Borchs1949: pp.96 ( Adult (F) ) [Palaearctic region]

Remarks

• Systematics: 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. However, we are keeping them separate at the present time. 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.

Illustrations

Citations