Mallomonas schwemmlei Glenk emend. Glenk & Fott

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 : 130

Mallomonas schwemmlei Glenk emend. Glenk & Fott

( Fig. 3K, L )

DISTRIBUTION. — Restricted to northern temperate regions ( Kristiansen & Preisig 2007; Řezáčová & Neustupa 2007). Our record of M. schwemmlei represents the eastern boundary of its distribution, based on current information.

REMARKS

This species has three types of scales with a fingerprint-like rib pattern which consists of semicircular ribs and straight or irregularly-curved parallel ribs ( Kristiansen 2002).

Earlier authors synonymized M. schwemmlei with M. coronifera Matv. ( Fott & Ettl 1959) but Glenk & Fott (1971) re-evaluated earlier observations and revealed that both species are independent. Unfortunately, the scales ultrastructure of M. coronifera is still unknown and it has been considered as a dubious species ( Kristiansen & Preisig 2007).

Figures

FIG. 3. — Mallomonas Perty taxa from the Ukrainian Polissia: A, Mallomonas matvienkoae Asmund & Kristiansen, SEM; B, Mallomonas ouradion K.Harris & D.E.Bradley, SEM; C, Mallomonas cf. pseudomatvienkoae B.Y.Jo, W.Shin, H.S.Kim, Siver & R.A.Andersen, SEM; D, Mallomonas paludosa Fott; E, F, Mallomonas papillosa K.Harris & D.E.Bradley emend. K.Harris, TEM (E) and SEM (F); G, Mallomonas pillula f. valdiviana Dürrschmidt, SEM; H, Mallomonas punctifera Korshikov, SEM; I, Mallomonas pugio D.E.Bradley, SEM; J, Mallomonas rasilis Dürrschmidt, SEM; K, L, Mallomonas schwemmlei Glenk emend. Glenk & Fott, body (K) and apical (L) scales, SEM; M, Mallomonas striata Asmund, SEM; N, Mallomonas teilingii W.Conrad, SEM; O, Mallomonas teres Nemcova & Kapustin, SEM; P, Mallomonas cf. tonsurata Teiling, SEM. Scale bars: A-F, I-M, O, P, 1 µm; G, 0.5 µm; H, N, 2 µm.