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Name derivation:

Chroodactylon -- chroos (Gr.):  color, skin + daktylos: digit, finger
ornatum (L.): decorated, equipped, or adorned

Formerly called Asterocystis ramosa and A. ornata  "Star cell" -- Star Astero- cell –cystis

Synonym Asterocystis

Classification:

Chroodactylon Hansgirg, 1885; There are 4 species of which 2 have been taxonomically accepted (Guiry and Guiry 2013).

Order Stylonematales;  Family Stylonemataceae

Morphology:

Uniseriate filaments with simple, irregular, or pseudodichotomous branching, and attached by a basal cell.  Cells are irregularly spaced in a matrix.   Each cell has a stellate plastid with a central pyrenoid.  Asexual reproduction by monospores and akinetes formed from vegetative cells.

Similar genera:

Stylonema

Habitat:

In the Northwest Atlantic a common, but inconspicuous, epiphytic alga on eelgrass (Zostera marina) in estuarine, sheltered marshy sites. Found in the mid littoral and shallow sublittoral zones.

 

References:

Hansgirg, A.  1885.  Ein Beitrag zur Kenntniss von der Verbreitung der Chromatophoren und Zellkernen bei den Schizophyceen (Phycochromaceen).  Berichte der deutsche botanischen Gesellschaft 3: 14-22.

Guiry, M.D. and G.M. Guiry  2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 19 September 2013.

Taylor, W. R.  1957.  Marine Algae of the Northeastern Coast of North America. Revised Edition.  Univ. Michigan Press., Ann Arbor, ix + 509 pp. (as Asterocytis ramosa)