"Dataset Code","Family","Species","Morphotype","Description","File Name"
"MRPHTYPE","Oscillatoriaceae","Oscillatoria subproboscidea","A","W. & G.S. West   Trichomes between 7.5-10 micrometers in width (including sheath in this and following taxa).  Terminal cell rounded and sometimes swollen with calyptra.  Trichomes often found within a sheath.  Granules present along transverse walls.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Oscillatoria subproboscidea","B","W. & G.S. West   Trichomes between 9-12 micrometers in width.  Similar to Morphotype A but wider and with more numerous granules. These granules may be gas vacuoles, providing protection from the high levels of ultraviolet light encountered in Antarctica.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Oscillatoria irrugua","C","Kutzing   Trichomes between 7-9 micrometers in width and often surrounded by a sheath.  Many cells have transverse walls with a convex shape (perhaps separation disks).  Terminal cell often attenuated.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Oscillatoria irrugua","D","Kutzing  Trichomes between 7.5-9.5 micrometers in width, sometimes surrounded by a sheath.  Dark, refractory surface obscures the cell interior.  Cell walls thin.  Terminal cell often with a calyptra.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Phormidium crouani","E","Gomont  Trichomes between 8-10 micrometers in width.  Dark, refractory surface obscures cell interior.  Granules scattered throughout the trichome.  Terminal cell slightly attenuated.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Oscillatoria koettlitzi","F","Fritsch  Trichomes between 7-9.5 micrometers in width.  Terminal cell swollen and often with a calyptra.  Cells narrow with a distinct light-dark pattern.  Necridia common (1-5) within each trichome.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Oscillatoria koettlitzi","G","Fritsch   Trichomes between 7-9.5 micrometers in width.  Similar to Morphotype E but with much shorter cell length.  Terminal cell swollen.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Oscillatoria koettlitzi","H","Fritsch  Trichomes between 8-10 micrometers in width.  Dense cells with a dark, refractory surface and no apparent sheath.  Terminal cells often capitate with no visible calyptra.  Distinct constrictions at the cell walls.  Necridia rare.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Phormidium autumnale","I","(Agardh) Gomont   Trichomes between 4-6 micrometers in width and often with a slight terminal hook.  Variable position and quantity of granules.  Terminal cell with a calyptra.  Could be independent trichomes of Microcoleus vaginatus.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Phormidium autumnale","J","(Agardh) Gomont  Trichomes between 2.5-3.5 micrometers in width.  Generally, cell walls clearly visible; granules rare. Terminal cell with a calyptra.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Phormidium autumnale","K","Gomont   Trichomes between 2-3.5 micrometers in width.  Nearly identical to Morphotype J except that trichomes arose from a common ""clump"".  Trichomes also appeared to taper slightly at the terminal end.  Rare occurrence.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Phormidium frigidum & Oscillatoria deflexa","L","Gomont  (P. frigidium) / W & G.S. West (O. deflexa)  Trichomes all less than 2.5 micometers in width.  Very thin trichomes--probably more than one species.  Usually, no cell structures visible, but occasionally, cells were box-shaped with distinct constrictions at the transverse walls.","algdescr.doc"
"MRPHTYPE","Oscillatoriaceae","Microcoleus vaginatus","M","(Vaucher) Gomont   Trichomes between 4-6 micrometers in width. Nearly identical to Morphotype I except that all trichomes were contained within a common sheath.  A few trichomes would protrude from the apex of the sheath.  Terminal cell with a distinct calyptra.  Could be colony of Phormidium autumnale.","algdescr.doc"
"MRPHTYPE","Rivulariaceae","Calothrix cf. intricata",,"Fritsch   Distinct, thick (1-8 micrometers), yellow sheaths surround these trichomes.  Cell width varied form 6-9 micrometers at base to 4-8 micrometers at apex.  Cells 2-3 micrometers long.  Basal heterocyst often present within sheath.  Granules scattered throughout trichome. Gradual attenuation of cells from basal to terminal end.  Akinetes rare.  Terminal cell slightly pointed.  Immature trichomes with thinner, greenish colored sheaths.  Occasionally, multiple trichomes intertwined together in thin mats but majority as independent trichomes.  Similar to Calothrix sp. described by Broady [1982].","algdescr.doc"
"MRPHTYPE","Prasiolaceae","Prasiola calophylla",,"(Carmichael) Meneghini   Young thalli consisting of uniseriate filaments 8-15 micrometers wide with cells 5-10 micrometers long.  Most common growth in narrow, foliose ribbons ranging from 5-50+ mm in length.  Growth processes form uniseriate to biseriate filaments with cell division in two planes.  Ribbons generally taper to a uniseriate ending often with a holdfast.  Cells with stellate chloroplast and central pyrenoid.  Aplanospores rare.","algdescr.doc"
"MRPHTYPE","Prasiolaceae","Prasiola crispa",,"(Lightfoot) Meneghini   This species most closely matched the description given by Fritsch [1917].  Although Broady [1979] and others commonly found Prasiola crispa near penguin rookeries, we found thalli (matching the description by Fritsch) in the hyporehic seeps of Taylor Valley streams (non-rookery locations).  Most common as young thalli with uniseriate filaments 10-15 micrometers wide and cells 4-12 micrometers long.  Axial chloroplast and central pyrenoid generally visible. Biseriate and multiseriate filaments produced after cell division in two planes.  Cells often remaining in clusters of four.  Phormidium form was common with its oval-shaped, opaque cells that appeared to be in a moribund state.","algdescr.doc"
"MRPHTYPE","Nostocaceae","Nostoc spp.",,"Ranged in growth from individual trichomes to dense, irregularly shaped colonies. Trichomes yellowish, 3-5 micrometers wide, 2-3 micrometers long, and closely packed within colonies. Heterocysts present at both ends and within the trichomes.  Akinetes not observed. Thin sheath surrounded the trichomes while a thick, yellow, mucilaginous sheath surrounded the colonies.  Size of colonies ranged from 10 micrometers in diameter to over 10 square cm.  Juvenile colonies with intercalary heterocysts also found.  Difficult to identify to species level without cultures.","algdescr.doc"
"MRPHTYPE","Nostocaceae","Nodularia cf. harveyana",,"Thuret   Trichomes 4-6 micrometers wide with no visible sheath.  Cells 3-5 micrometers long and terminal cell slightly conical.  Heterocysts large (5-8 micrometers long) and circular.","algdescr.doc"
"MRPHTYPE","Chroococcaceae","Chroococcus cf. minutus",,"(Kutzing) Nageli   Spherical cells, 5-8 micrometers in diameter.  Cells surrounded by a thin sheath.  Cells have larger, colorless mucilage envelopes (4-10 micrometers) immediately surrounding the sheath.  One-, two-, and four-cell clusters were found but most common in colonies of two cells.","algdescr.doc"
"MRPHTYPE","Chroococcaceae","cf. Gloeocapsa kuetzingiana",,"Nageli   Generally, a dark orangish brown colony of individual cells, 2-5 micrometers in diameter.  Cells arranged irregularly in a mucilaginous sheath.  Colonies ranged from 6-78 micrometers in width and contained 3-100+ cells.","algdescr.doc"
"MRPHTYPE","Chroococcaceae","Gloeocapsa sp.",,"Cells ovoid-ellipsoidal, 1-3 micrometers in width, and contained within a sheath. Colonies spherical with 1-5 cells, often found growing adjacent to other colonies.  Rare.","algdescr.doc"
"MRPHTYPE","Mesotaeniaceae","Actinotaenium cf. cucurbita",,"(Brebisson) Teil   Cells 25-33 micrometers by 13-20 micrometers.  Rounded hemi-cell with a slight median constriction.  One chromatophore per half cell with four ribs and a central, spherical pyrenoid.","algdescr.doc"
"MRPHTYPE","Palmellaceae","Asterococcus sp.",,"Spherical cells, 3 micrometers in diameter, found in a common gelatinous matrix.  Each cell with an asteroidal chloroplast with arms radiating from a central pyrenoid.  Rare.","algdescr.doc"
"MRPHTYPE","Ulotrichaceae","cf. Binuclearia tectorum",,"(Kutzing) Beger   Long, uniseriate filaments with cells 6-11 micrometers in width and 8-13 micrometers long.  Filaments surrounded by a mucilaginous sheath.  Cells with a parietal chloroplast and a distinct pyrenoid.","algdescr.doc"
"MRPHTYPE","Chlorellaceae","Chlorella sp.",,"Globular, mucilaginous colonies, 8-10 micrometers in width, consisting of several (approximately 20) green, spherical cells, 1-2 micrometers in diameter.  Rare.","algdescr.doc"