TY - JOUR

T1 - Dermamoeba algensis n. sp. (Amoebozoa, Dermamoebidae) - An algivorous lobose amoeba with complex cell coat and unusual feeding mode

AU - Smirnov, Alexey V.

AU - Bedjagina, Olga M.

AU - Goodkov, Andrew V.

PY - 2011/5/1

Y1 - 2011/5/1

N2 - The genus Dermamoeba unifies oblong, flattened amoebae of lingulate morphotype, possessing a thick multilayered cell coat. It includes two species, D. granifera and D. minor. In this paper we describe a third species of this genus, D. algensis n. sp. This species is algivorous; engulfing a large algal cell, it destroys part of the cell coat liberating the plasma membrane, which forms the food vacuole. Thus the glycocalyx never appears inside the phagosome. This observation confirms that some of the thick-coated amoebae may use this way to avoid energetically costly digestion of their own glycocalyx. Studies of the physiology of this organism show that it feeds most actively at a temperature of 22-25 °C. Below and above this temperature the feeding intensity drastically decreases. The new species can survive NaCl concentrations up to 5%, which roughly corresponds to 50 ppt salinity. Accordingly, D. algensis has a wide range of salinity tolerance.

AB - The genus Dermamoeba unifies oblong, flattened amoebae of lingulate morphotype, possessing a thick multilayered cell coat. It includes two species, D. granifera and D. minor. In this paper we describe a third species of this genus, D. algensis n. sp. This species is algivorous; engulfing a large algal cell, it destroys part of the cell coat liberating the plasma membrane, which forms the food vacuole. Thus the glycocalyx never appears inside the phagosome. This observation confirms that some of the thick-coated amoebae may use this way to avoid energetically costly digestion of their own glycocalyx. Studies of the physiology of this organism show that it feeds most actively at a temperature of 22-25 °C. Below and above this temperature the feeding intensity drastically decreases. The new species can survive NaCl concentrations up to 5%, which roughly corresponds to 50 ppt salinity. Accordingly, D. algensis has a wide range of salinity tolerance.

KW - Amoebozoa

KW - Biology

KW - Systematics

KW - Ultrastructure

UR - http://www.scopus.com/inward/record.url?scp=79957528365&partnerID=8YFLogxK

U2 - 10.1016/j.ejop.2010.12.002

DO - 10.1016/j.ejop.2010.12.002

M3 - Article

C2 - 21429718

AN - SCOPUS:79957528365

VL - 47

SP - 67

EP - 78

JO - European Journal of Protistology

JF - European Journal of Protistology

SN - 0932-4739

IS - 2

ER -