Mallomonas asmundiae (Wujek & van der Veer) K.H.Nicholls

Kapustin, Dmitry A., Gusev, Evgeniy S., Lilitskaya, Galina G. & Kulikovskiy, Maxim S., 2020, Silica-scaled chrysophytes from the Ukrainian Polissia, Cryptogamie, Algologie 20 (12), pp. 121-135 : 125

Mallomonas asmundiae (Wujek & van der Veer) K.H.Nicholls

( Fig. 2D )

DISTRIBUTION. — Widely distributed ( Kristiansen & Preisig 2007).

REMARKS

Initially this taxon was described as a variety of Mallomonas cratis K.Harris & D.E.Bradley, M. cratis var. asmundiae Wujek & van der Veer , and later it was raised to the rank of species. In Mallomonas asmundiae the dome is ornamented by the parallel ribs whereas in M. cratis the ribs are U-shaped. Additionally, the scales of M. asmundiae have pronounced lateral incurvings and a more densely striated posterior flange ( Siver 1991).

Figures

FIG. 2. — Mallomonas Perty taxa from the Ukrainian Polissia: A, Mallomonas acaroides Perty emend. Iwanoff, SEM; B, Stomatocyst of Mallomonas cf. akrokomos Ruttner,SEM; C, Mallomonas annulata (D.E.Bradley) K.Harris, SEM; D, Mallomonas asmundiae (Wujek & van der Veer) K.H.Nicholls, SEM; E, F, Mallomonas calceolus D.E.Bradley, SEM; G, Mallomonas canina Kristiansen, SEM; H, Mallomonas caudata Iwanoff emend. Willi Krieger, SEM; I, Mallomonas corcontica (Kalina) L.Ş.Péterfi & Momeu, SEM; J, Mallomonas costata Dürrschmidt, SEM; K, Mallomonas crassisquama (Asmund) Fott, SEM; L, Mallomonas cratis K.Harris & D.E.Bradley, TEM;M, Mallomonas elongata Reverdin, SEM; N, Mallomonas heterospina J.W.G.Lund, SEM; O, Stomatocyst of Mallomonas mangofera var. foveata (Dürrschmidt) covered with scales, SEM. Scale bars: A, D-F, H-K, 1 µm; B, C, L-O, 2 µm; G, 0.5 µm.