Valid Names Results

Rhizoecus nemoralis (Hambleton, 1946) (Rhizoecidae: Rhizoecus)

Morrisonella nemoralis Hambleton 1946: 33. Type data: GUATEMALA: at the road between Quetzaltenango and Tototicapan, on Alchemilla orbiculata. Holotype, female, Type depository: Washington: United States National Entomological Collection, U.S. National Museum of Natural History, District of Columbia, USA; accepted valid name Illustr.
Rhizoecus nemoralis (Hambleton, 1946); Ferris 1953a: 456. change of combination

Families: 9 | Genera: 9

Alchemilla propinqua | BenDov1994 Hamble1946 WilliaGr1992 | (= Alchemilla orbiculata)

Countries: 5

CaballKaRa2026: pp.117 ( Adult (F) ) [Rhizoecidae species recorded in Germany]
KaydanKoKo2019: pp.3-4 ( Adult (F) ) [Neotropical Rhizoecus species]
JansenWe2015: pp.12, 16 ( Adult (F) ) [Subterranean mealybugs of The Netherlands]
KozarKo2007: pp.132-137 ( Adult (F) ) [world]
WilliaGr1992: pp.499 ( Adult (F) ) [Central and South America]
Hamble1976: pp.8 ( Adult (F) ) [World]
McKenz1967: pp.372 ( Adult (F) ) [U.S.A., California]
McKenz1962: pp.673 ( Adult (F) ) [North America]
McKenz1961: pp.42 ( Adult (F) ) [North America]
McKenz1960: pp.743 ( Adult (F) ) [North America]
Ferris1953a: pp.427 ( Adult (F) ) [North America]
Hamble1946: pp.17 ( Adult (F) ) [World]

Systematics: Only a part of the Rhizoecus nemoralis specimens observed by Jansen & Westenberg, 2015 have tubular ducts, so they suggested that it is possible that Rh. nemoralis and Rh. dianthi represent the same species. The morphometric analysis shows that Rh. nemoralis has tubular ducts with a diameter shorter than a trilocular pore, always present on the venter of abdominal segments VII and VIII, but could extend until segment III, totalling 14.4 ± 3.7 (11–21), and a minimum of three ducts always present in the central area posterior to the vulvar aperture.. In contrast, Rh. cyperalis has a “few”, “small” tubular ducts restricted to the margin of the posterior abdominal segments, and Rh. pauciporus has tubular ducts on the dorsum and venter of the head, thorax and abdomen, with a diameter larger than a trilocular pore. (Caballero, et al., 2026)
Structure: Adult female body oval-elongated, 1.6 ± 0.2 (1.3–1.8) mm long and 1 ± 0.1 (0.7–1.1) mm wide . Antenna with six segments. (Caballero, et al., 2026)
Biology: Occurring on the roots of the host plant.
General Remarks: Description and illustration of adult female by Ferris (1953a), Hambleton (1976), Williams & Granara de Willink (1992) and by Kozár & Konczné Benedicty (2007).

BenDov1994: catalog, 463
CaballKaRa2026: diagnosis, distribution, host, illustration, key, taxonomy, 92, 112-114, 116, 117
Ferris1953a: description, distribution, host, illustration, taxonomy, 456-457
Hamble1946: description, distribution, host, taxonomy, 33-35
Hamble1976: description, distribution, host, illustration, taxonomy, 38-79
JansenWe2015: distribution, key, 16
KaydanKoKo2019: key, 3
KozarKo2007: description, distribution, host, illustration, taxonomy, 271-273
SodanoOuSc2023: ant association, morphology, 5
WilliaGr1992: description, distribution, host, illustration, taxonomy, 552-554