ABCDEFGHIJKLMNOPQRSTUVWXYZ

Authority

W.N.Ellis Throndsen (1969: 178, fig. 14)

Class

Craspedophyceae/Choanoflagellida

Order

Choanoflagellida

Family

Acanthoecidae

Additional References

Marchant et al. (1987b: 17, figs 9, 10), Marchant & Perrin (1990: 504)

top

Basionym

N/A

Synonyms

N/A

Description

Cells solitary. Lorica somewhat waisted to form anterior and posterior chambers, 16–17 µm long overall; anterior chamber 10 µm long, 9 µm diameter; posterior chamber 6.5 µm long, 6.4 µm diameter; longitudinal costae c. 13; transverse costae 3 in anterior chamber, 4 in posterior chamber; pedicel sometimes present. Longitudinal costae each comprising 5 costal strips; anteriormost costal strips forming T-junctions or short stalks where they meet the anterior transverse costa. Transverse costal arrangement difficult to discern; a double row of transverse costae surrounds the middle of the anterior lorica chamber [as described by Throndsen (1969)]; another costa at the waist of the lorica; 4 costae in the posterior chamber. Protoplast ellipsoidal to obovoid, 4.2 µm long, situated in the posterior lorica chamber, with a collar of tentacles and a flagellum in the anterior chamber.

Distribution

Inshore Prydz Bay, East Antarctica; North Atlantic waters (Throndsen, 1969, 1974).

Comments

N/A

top