Valid Names Results

Uhleria mariannae (Pellizzari in Pellizzari & Germain, 2010) (Eriococcidae: Uhleria)

Nomenclatural History

• Uhleria? nr. araucaria Kozár 2009. nomen nudum (discovered by PellizKo2011, 67).
• Acanthococcus mariannae Pellizzari in Pellizzari & Germain 2010: 52-62. Type data: ITALY: Genova, on Leptospernum scoparium, 8/14/2004, by unknown. Holotype, female and first instar, by original designation Type depository: Padova: Dipartimento Agronomia Ambientale Produzioni Vegetali - Entomologia, Italy; accepted valid name Notes: Paratypes deposited in Paris France at the Musdum National d'Histoire Naturelle, and at Montferrier-sur-Lez, France at Laboratoire National de la Protection des Végétaux. Illustr.
• Uhleria mariannae (Pellizzari in Pellizzari & Germain, 2010); Kozár, Kaydan, Konczné Benedicty & Szita 2013: 584-586. change of combination

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• KozarKaKo2013: pp.580 ( Adult (F) ) [Key to species of Uhleria]
• PellizGe2010: pp.52 ( Adult (F) ) [Key to the 7 eriococcid species known to occur on Leptospermum spp.]

Remarks

• Systematics: Acanthococcus mariannae is readily distinguished by the combination of: dorsal spinose setae much shorter than the marginal spinose setae; anal lobe with strong sub-apical setae; and the presence of very large, dorsal macrotubular ducts. It is the only eriococcid species known to feed on Leptospermum recorded in Britain. (Malumphy & Salisbury, 2014)
• Structure: Living adult female elongate, oval, grey-brown; abdomen with distinct segmentation. Females settled on upper surface of leaves or on twigs of host plant. Before egg-laying, the adult females become enclosed in a felted, white, lightly convex eggsac, open only at anal end. Male test oval, white, on under surface of leaves. Adult males winged. Mounted adult female: body elongate oval. A. mariannae differs from the other Eriococcus species on Leptospermum by having: 7 segmented antennae; dorsal enlarged setae markedly smaller than marginal setae: large dorsal macrotubular ducts with markedly symmetrical sups; and two sizes of ventral tubular ducts. The large dorsal macrotubular ducts are clearly visible in the living adult female under magnification. (Pellizzari & Germain, 2010) First-instar nymph: the nymphal stage of other species of Eriococcus examined in New Zealand were not found to have trilocular pores as seen in A. mariannae, and are 5 locular on other Palaearctic Eriococcus first instars. Second-instar female nymph: the distribution of ventral 5-locular pores is similar to E. orariensis, but it is clearly different in having enlarged marginal setae along the whole body margin (E. orariensis has marginal setae only on the abdominal segments.) Second-instar male nymph: E. orariensis has a moderate number of dorsal tubular ducts and on the venter, they are almost entirely 5 locular pores. The macrotubular ducts are numberous on the dorsum of A. mariannae and are also present on the ventral margin and submargin of the body, mixed with smaller tubular ducts.
• Biology: The young adult remales and the ovipositing females , enclosed in their white felted eggsac, settle on the under surface of leaves, on the axil of leaves and twigs, and along the thin twigs of Leptospermum scoparium. The collection data for A. marianne suggest that this species could develop several overlapping generations. (Pellizzari & Germain, 2010) The sex ratio observed in the Essex, England population was 2 females: 1 male (based on counting the male tests). Females collected from Essex laid an average of 121 eggs (range 58–192, n=8). They appeared to have overwintered in the UK in the egg stage as the majority of live specimens observed in March were eggs. (Malumphy & Salisbury, 2014)
• General Remarks: Detailed description, photos and illustrations in Pellizzari & Germain, 2010.

Illustrations

Citations