Valid Names Results

Pseudochermes betula (Wu & Liu, 2009) (Cryptococcidae: Pseudochermes)

Nomenclatural History

• Kuwanina betula Wu & Liu 2009: 221-223. Type data: CHINA: Henan Province, Songxian County, Mt. Baiyun, (34.08ºN, 112.05ºE) on Betula ablo-sinensis Burkill, 8/15/2008, by S. Wu & J. Liu. Holotype, female, Type depository: Beijing: Forestry University, Beijing, China; accepted valid name Illustr.
• Kuwanina betulae Wu & Liu, 2009; Kozár, Kaydan, Konczné Benedicty & Szita 2013: 642. misspelling of species epithet
• Pseudochermes betula (Wu & Liu, 2009); Wu & Nan 2015: 576–584. change of combination

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• WuNa2015: pp.579 ( Adult (F) ) [Key to female instars of Pseudochermes betula.]
• KozarKaKo2013: pp.641 ( Adult (F) ) [Key to species of Kuwanina] Key as: Kuwanina betulae
• WuLi2009: pp.221 ( Adult (F) ) [Key to Kuwanina species] Key as: Kuwanina betula

Remarks

• Systematics: Nan et al. (2013) studied the relationships among eriococcids and related scale insects, including K. betula, based on molecular data. In two phylogenetic trees, based on 18S and 28S rDNA sequences, K. betula always fell within the "Gondwanan" clade of Cook and Gullan (2004), along with Cryptococcus spp. (including the type species C. fagisuga Lindinger), Pseudochermes fraxini (Kaltenbach) and members of the Acanthococcidae, showing a strong sister relationships with P. fraxini with 100% Bayesian posterior probability support. The first-instar nymphs of K. betula are most similar to those of P. fraxini in the presence of frontal tubercles, and the adult females are more similar to those of C. fagisuga. Based on these similarities and molecular relationships of K. betula, plus the presence of 6-locular pores around the inner orifice of outer part of the macrotubular ducts in Pseudochermes williamsi Kozár & Konczné Benedicty (Kozár & Konczné Benedicty, 2008), which is similar to that found in adult female K. betula, Wu and Nan transferred K. betula to Pseudochermes.(Wu & Nan, 2015)
• Structure: In life, adult female hemispherical or spherical, pink, covered with white cottony secretion of fine waxy threads. Mounted specimen is circular. Anal lobe absent, antenna stub-like, 3 segmented; dypeolabral shield nearly rectangular. Fore and mid-legs absent, each hind leg reduced to a transverse oval pore plate; spiracles surrounded by a sclerotized plate. Vulva distinct, circular. (Wu & Liu, 2009)
• Biology: It lives in the crevices of bank on the main trunk of Betula ablo-sinensis. (Wu & Liu, 2009)
• General Remarks: Detailed description and illustration in Wu & Liu, 2009. The immature stages are described and illustrated in Wu & Nan, 2015.

Illustrations

Citations