Valid Names Results

Trionymus cressae is now Maconellicoccus cressae (Hall, 1927) (Pseudococcidae: Maconellicoccus)

Phenacoccus hirsutus cressae Hall 1927d: 270. Type data: EGYPT: Khanka, on Cressa cretica. 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.
Trionymus euphorbiae Hall 1927d: 271. Type data: EGYPT: Sollum, on Euphorbia sp.. Syntypes, female, Type depository: London: The Natural History Museum, England, UK; junior synonym (discovered by Ezzat1962b, 72).
Erium euphorbiae (Hall, 1927); Lindinger 1935a: 122. change of combination
Trionymus cressae (Hall, 1927); Ezzat 1962a: 72. change of combination
Maconellicoccus cressae (Hall, 1927); Evans & Abd-Rabou 2023: 19. change of combination

Families: 2 | Genera: 2

Countries: 3

Systematics: Like Maconellicoccus hirsutus, it has oral rim ducts on both the dorsum and venter, an anal bar, and 4 pairs of cerarii on the 4 posteriormost abdominal segments but differs primarily in lacking a circulus and usually having 8-segmented antennae versus M. hirsutus which has a circulus and 9-segmented antennae. It is also similar to Maconellicoccus leptospermi Williams in that it lacks a circulus, has 4 pairs of cerarii and has oral collar tubular ducts on the dorsum, but differs from that species and other Maconellicoccus species by having translucent pores on the hind coxae. (Evans & Abd-Rabou, 2023)
General Remarks: Good description and illustration of the adult female given by Ezzat (1962a).