Pectinatella magnifica (Leidy, 1851)

English n/a ISEIA: C1
Lëtzebuergesch Schwamp-Moosdéierchen EASIN
Français Pectinatelle Wikipedia: Wikipedia - English - Greater duckweed Wikipedia - Français - Lentille d'eau géante Wikipedia - Deutsch - Vielwurzelige Teichlinse Nederlands
Deutsch Schwammartiges Moostierchen Wikispecies: Wikispecies - Pectinatella magnifica
Nederlands n/a Back to the list of invertebrates

Report the species

Report Pectinatella magnifica to the National Museum of Natural History.

Importance and distribution in Luxembourg

In 2012 numerous colonies of Pectinatella magnifica (Leidy, 1851) (Bryozoa, Phylactolaemata) were discovered in the reservoir of Esch-sur-Sûre (Luxembourg) fed by the river Sûre. The colonies were particularly abundant in the shallow, warm and nutrient rich water near the riverbank, but some colonies were spotted by divers in the reservoir at a depth of 8-9 m in one site and more than 20 m in another site. There is reliable evidence, that Pectinatella was present, but less conspicuous and not identified as such, in 2011 and possibly already in 2010. P. magnifica was hitherto unrecorded from Luxembourg, but known from a site near the German-Luxembourg border near Nennig (Germany, Saarland) where statoblasts were found in 2001 (Massard et al. 2013).

Risk assessment

ISEIA protocol: C1 (3+2+1+1) (Ries et al. 2017: 68).

Bibliography concerning Luxembourg

  • Massard, J.A., G. Geimer & E. Wille, 2013. Apparition de Pectinella magnifica (Leidy, 1851) (Bryozoa, Phylactolaemata) dans le lac de barrage d’Esch-sur-Sûre (Luxembourg). Bulletin de la Société des naturalistes luxembourgeois 114: 131-148.
  • Massard, J.A. & G. Geimer, 2015. L’histoire de la recherche bryozoologique au Luxembourg (Phylactolémates et Gymnolémates d’eau douce). Bull. Soc. Nat. luxemb. 116: 373-379. [PDF 1,35 MB]
  • Ries, C., A. Arendt, C. Braunert, S. Christian, A. Dohet, A. Frantz, G. Geimer, M. Hellers, J. A. Massard, X. Mestdagh, R. Proess, N. Schneider & M. Pfeiffenschneider, 2017. Environmental impact assessment and black, watch and alert list classification after the ISEIA Protocol of invertebrates in Luxembourg. Bull. Soc. Nat. luxemb. 119: 63-70. [PDF 360 KB]

Suggested citation of this webpage

Ries, C. & M. Pfeiffenschneider (Eds.), 2019. Pectinatella magnifica (Leidy, 1851). In: - Invasive Alien Species in Luxembourg. URL: [21.08.2019].

 Last updated on Tuesday, April 10, 2018.