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Rhabdoderma

Generic name: RHABDODERMA Schmidle et Lauterborn, 1900. Ber. Deutsch. Bot. Ges. 18: 148.
Synonyms:
CATELLA Alvik, 1934. Bergens Mus. Arbok 1934 (Naturw. Rekke 6): 37.

GLOEOCAPSA subg. RHABDODERMA (Schmidle et Lauterborn) Elenkin 1923

Diagnosis:
Type species: Rhabdoderma lineare Schmidle et Lauterborn 1900.
Descriptions:
Komárek & Anagnostidis (1998): Cells in small microscopic, irregularly oval or elongate-irregular mucilaginous colonies, usually distant from one another or in short pseudofilamentous rows, irregularly and widely spaced, but often oriented in one direction in a colony. Mucilage fine, colourless, homogeneous, sometimes diffluent (staining !); cells rarely with individual fine, indistinct gelatinous envelopes. Cells cylindrical, rod- shaped, straight, arcuate or sigmoid, with rounded ends, sometimes several times longer than wide; occasionally are present long, filamentous involution cells or unevenly long cells in one colony.
Komárek (1992): Unicellular - colonial; colonies microscopic, containing usually relatively small number of cells, only old colonies rarely with many cells, mucilaginous, with more or less elongated cells, loosely arranged, distant one from another, oriented more or less in one direction or in loose rows (this position is disturbed in old colonies); colonial slime colourless, without structure, homogeneous and usually diffluent at the margin. Sometimes few small colonies clustered together. Cells long oval up to rod-like, rounded at the ends, straight, arcuated or sigmoid, with pale blue-green, rarely pinkish homogeneous content. Involution cells filament-like.
Geitler (1932): Zellen länglich-ellipsoidisch bis zylindrisch, gerade oder halbkreisförmig bis S-förmig gekrümmt, in gemeinsamer, meist schwer sichtbarer homogener Gallerte zu wenigen beisammen. Kolonien flach-hautartig oder rundlich. Zellen einzeln oder nach der Teilung zu zwei bis mehreren in Reihen.  Teilung quer.
Genotype differences, molecular data:
Reproduction strategies, life cycles, cell division:
Komárek & Anagnostidis (1998): Cells only divide transversely to the longer axis, symmetrically or asymmetrically; daughter cells sometimes remain joined together in short pseudofilamentous rows. Reproduction by disintegration of colonies.
Komárek (1992): Cell division (binary fission) by cleavage, always perpendicular to the longer axis of cells, in involution cells sometimes irregularly (asymmetrically). Daughter cells separate one from another, or form short pseudofilamentous rows. Reproduction by disintegration of colonies and by solitary cells.
Ultrastructure:
Taxonomic position, higher hierarchy:
Cyanophyceae, Chroococcales, Synechococcaceae, Synechococcoideae
Notes to taxonomy, misinterpretations:
Ecology, ecophysiology, ecological significance:
Komárek (1992): Several planktic species, few taxa were described from metaphyton and detritus in not polluted water biotopes with numerous water plants. One species is kryosestonic, one is known from salinic water.
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species concept:
List of species:
Rhabdoderma compositum (G.M. Smith) Fedorov 1967
Rhabdoderma curtum (Setchel) Komárek etAnagnostidis 1995
Rhabdoderma irregulare (Naumann)
Rhabdoderma lineare Schmidle et Lauterborn 1900
Rhabdoderma rubrum (Alvik) Komárek et Anagnostidis 1995
Rhabdoderma sancti-pauli Azevedo et al. 2003
Rhabdoderma tenuissimum Komárek et Kling 1991
Rhabdoderma transsylvanicum (Kol) Komárek et Anagnostidis 1995
Rhabdoderma vermiculare Fott 1952
Rhabdoderma zygnemicolum Copeland 1936

Unclear taxa:
Rhabdoderma bellyeense Hortobagyi 1944
Rhabdoderma canillesiana Gonzalez 1946
Rhabdoderma lineare var.  minor Emoto et Hirose 1939
Rhabdoderma salinum Tutin 1940
Rhabdoderma surchanense Ergašev 1980

Excludenda:
Rhabdoderma gorskii Woloszyńska 1917 = Rhabdogloea gorskii (Woloszyńska) Joosten 2006

Keys:
List of stains:
Drawings:
Komárek 1992
Application technology:
Literature:

  2.1 taxonomy: Geitler 1932, Geitler 1942, Komárek 1958, Komárek 1970, Healey 1985, Komárek & Anagnostidis
1986, Komárek & Kling 1991, Komárek 1992, Komárek & Anagnostidis 1998
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: