First record of Pectinatella magnifica (Leidy 1851) in Hungary

Szekeres J.1, Akác A.2 and Csányi B.1



1 MTA (Hung. Acad. Sci.), Centre for Ecological Research, Danube Research Institute, Jávorka Sándor u. 14, Göd H-2131, Hungary

2 Middle - Danube - Valley Inspectorate for Environmental Protection, Nature Conservation and Water Management, 1447 Budapest, Pf.: 541. E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it





Colonies of freshwater Bryozoa Pectinatella magnifica (Leidy, 1851) were recorded in the summer of 2011 in the Danube side arm Ráckevei-Soroksári Duna, downstream from Budapest. These are the first records of this non-indigenous bryozoan species in Hungary originating from North America.

Keywords: biological invasions, aquatic invasions, non-indigenous aquatic taxa, Danube River



Pectinatella magnifica (Leidy 1851) (Figure 1) Common names: magnificent bryozoan or moss animal

During the regular Hungarian EU Water Framework Directive compliant water monitoring program, in mid August 2011, numerous colonies of Pectinatella magnifica (Leidy 1851) (Bryozoa: Phylactolaemata: Plumatellida) were recorded in the Danube side arm Ráckevei-Soroksári Duna (RSD) (Figure 2).

The colonies of this animal were present only at the very lower end of the Danube arm at Tass (Figure 2), just at the vicinity of the downstream navigational sluice (coordinates: N 47.03315, E 18.97759). The water temperature was around the yearly maximum, well above 23°C. Since that time P. magnifica is regularly occurring in the RSD during the summer period. In consequent years (2012 and 2013), the moss animal was recorded at the same site of the initial observation (Tass) and in two additional sites in the RSD (Table 1). Based on interviews with anglers, colonies of P. magnifica are very frequent during the summer and can be found everywhere along the RSD arm.



Figure 1: Colonies of P. magnifica from Ráckevei-Soroksári Duna side arm in Hungary (site near Tass, photos by Szekeres J)


Table 1: The coordinates of the finding sites of P. magnifica in Ráckevei-Soroksári Duna side arm – August 2013 (WGS 84)