Kumanoa ambigua

Type Locality: French Guiana

Distribution: North Ameria: Belize, Costa Rica, Puerto Rico; South America: Brazil, French Guiana

Information about Kumanoa ambigua on Algaebase.

Information about Kumanoa ambigua on GenBank.

"Plants moderately mucilaginous, delicate; branching irregular and abundant; apices straight, apical cells embedded within the tips; 0.5-6.0 cm high, 275-600 µm in diameter. Whorls well developed, usually distinct and confluent, obconic or barrel-shaped, becoming compressed and indistinct in older parts. Internode 200-650 µm long. Pericentral cells ovoid with 2-4 primary fascicles; rhizoidal filaments well developed, forming 1-2 layers of cylindrical cells. Primary fascicles straight, (6-)7-12(-15) cell-storeys; proximal cells cylindrical or elliptical, L/D 3.5-7.0; distal cells elliptical, obovoid or pear-shaped, L/D 1.3-3.0; branching di- or trichotomous. Secondary fascicles abundant, covering the entire internode and as long as primary fascicles.

Monoecious. Spermatangia sub-spherical or obovoid, terminal or sub-terminal on primary or secondary fascicles, 5.0-7.0 µm in diameter. Carpogonial branches, helically twisted, arising from pericentral cells, rarely on fascicle cells, composed of 4-8 disc- or barrel-shaped cells; involucral filaments short, 1-3 cell-storeys; carpogonia (15-)23-43(-65) µm long; trichogyness cylindrical, club-shaped, elliptical or elongate-conical, unstalked, 6.0-10.0(-12.5) µm in diameter. Carposporophytes 1 per whorl, dense, semi-spherical, lower or higher than the whorl radius, 120-300(-450) µm in diameter, 90-200(-250) µm high; gonimoblast filaments 3-7 cell-storeys; cells cylindrical or elliptical; carposporangia obovoid, 10.0-17.5 µm in length, (5.0-)6.5-10.5 µm in diameter."

Necchi, O. Jr. & Vis, M.L. 2012. Monograph of the genus Kumanoa (Rhodophyta, Batrachospermales). Bibliotheca Phycologica 116. J. Cramer. Pp. 78. ISBN 978-3-443-60043-3.

Kumano, S. 2002. Freshwater red algae of the world. Biopress Ltd. 375pp.

Montagne, C. 1850. Cryptogamia guyanensis, seu plantarum cellularium in Guyana gallica annis 1835-1849 a cl. Leprieur collectarum enumeratio universalis. Ann. Sci. Nat Bot.,ser.3, 14:283-309.

Plants monoecious, moderately mucilaginous, 0.5-6 cm high, 300-600 μm in diameter, straight, abundantly and irregularly branched; whorls well-developed, dense or lax, obconical or barrel-shaped, contiguous, rarely separated; fascicles 3 or 4, primary fascicles di- or trichotomously branched, 7-12(-15) cell-storeys, proximal cells cylindrical or ellipsoidal, 4.5-8.5 μm in diameter, 20-45 μm long, distal cells ellipsoidal, obovoidal, pear-shaped, 4-7 μm in diameter, 7-15 μm long, terminal hairs numerous or few, short; cortical filaments well-developed; secondary fascicles numerous, reaching the length of whorls; spermatangia spherical or obovoidal, 5-7 μm in diameter, terminal or subterminal on fascicles; carpogonium-bearing branches spirally coiled, consisting of 4-8 disc- or barrel-shaped cells, arising from periaxial cells, rarely distal cells; involucral filaments numerous, short; carpogonia asymmetrical, 5-6 μm in diameter at the base, 7-10 μm in diameter at the apex, 22-65 μm long, trichogyne cylindrical, club-shaped, or elongate conical, sessile or stalked; carposporophytes sessile, single, dense, hemispherical, shorter, rarely higher, than whorls, 100-250 μm in diameter, 120-450 μm high, inserted centrally; carposporangia obovoidal, 6.5-10.5 μm in diameter, 10-17.5 μm long