Exuviaella
Exuviaella Cienkowski (ref. ID; 1618)
[ref. ID; 1618]
Subspherical or oval; no anterior projection, except two flagella; two lateral chromatophores, large, brown, each with a pyrenoid and a starch body; nucleus posterior; salt and fresh water. (ref. ID; 1618)
- Exuviaella antarctica Hada, 1970 (ref. ID; 3544 original paper)
- Exuviaella apora Schiller (ref. ID; 1618)
- Exuviaella baltica (ref. ID; 1618)
- Exuviaella compressa (Stein) (ref. ID; 1618) or (Bailey) (ref. ID; 3494)
- Exuviaella marina Cienko (ref. ID; 3494, 3544) reported author and year? (ref. ID; 1618)
Descriptions
The new form bears a small ovate theca compressed fairly. The surface of the theca is smooth, and minute perforation is hardly observable. (ref. ID; 3544)
Comments
The new species is distinguishable from the known forms of the genus in having a smooth theca. Exuviaella sp. reported by Balech & El-Sayed (1965) from the Weddell Sea is slightly different from this species in presence of few minute pores on the theca, but these forms of antarctic waters may be included in the same species owing to the similar shape. (ref. ID; 3544)
Measurements
Length 15-17; breadth 12-15; thickness 9-10 um. (ref. ID; 3544)
Descriptions
Compressed, oval; striae on margin of valves; chromatophores numerous yellow-brown, irregular in form; common in brackish water. (ref. ID; 1618)
Measurements
30-32 by 21-26 um (Schiller); 17-22 by 14-19 um (Lebour; Martin). (ref. ID; 1618)
Descriptions
Braarud et al. (1958) found under electron microscope the theca is spinous and the cell wall is made up cellulose fibrils. The spines may play an important role in obtaining nourishment. (ref. ID; 1618)
Exuviaella compressa (Stein) (ref. ID; 1618) or (Bailey) (ref. ID; 3494)
Descriptions
Flattened ellipsoid test; anterior end with a depression through which two flagella emerge; two chromatophores pale or deep green, each with a pyrenoid; nucleus posterior; no stigma; fresh and salt water. (ref. ID; 1618)
The shell of the species is longer elliptical and more compressed in comparison with that of E. marina Cienko. (ref. ID; 3494)
Measurements
22-26 by 15-18 by 11-12 um. (ref. ID; 1618)
Length 32 um; breadth 25 um; thickness 10 um. (ref. ID; 3494)
Exuviaella marina Cienko (ref. ID; 3494, 3544) reported author and year? (ref. ID; 1618)
Descriptions
The shell having a fine perforation are ovate in lateral view and more or less compressed. The flagellar pore opens at the anterior end without a lobe. The structure of the cell closely resembles to that of Prorocentrum. (ref. ID; 3494)
Measurements
36-50 um long. (ref. ID; 1618)
Length 35-45 um; breadth 30-40 um; thickness 22-25 um. (ref. ID; 3494)