----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 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 | algdescr.doc | | | | | | and following taxa). Terminal cell rounded and sometimes swollen with calyptra. | | | | | | | Trichomes often found within a sheath. Granules present along transverse walls. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Oscillatoria subproboscidea | B | W. & G.S. West Trichomes between 9-12 micrometers in width. Similar to Morphotype A but | algdescr.doc | | | | | | wider and with more numerous granules. These granules may be gas vacuoles, providing | | | | | | | protection from the high levels of ultraviolet light encountered in Antarctica. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Oscillatoria irrugua | C | Kutzing Trichomes between 7-9 micrometers in width and often surrounded by a sheath. | algdescr.doc | | | | | | Many cells have transverse walls with a convex shape (perhaps separation disks). Terminal | | | | | | | cell often attenuated. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Oscillatoria irrugua | D | Kutzing Trichomes between 7.5-9.5 micrometers in width, sometimes surrounded by a sheath. | algdescr.doc | | | | | | Dark, refractory surface obscures the cell interior. Cell walls thin. Terminal cell | | | | | | | often with a calyptra. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Phormidium crouani | E | Gomont Trichomes between 8-10 micrometers in width. Dark, refractory surface obscures | algdescr.doc | | | | | | cell interior. Granules scattered throughout the trichome. Terminal cell slightly | | | | | | | attenuated. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Oscillatoria koettlitzi | F | Fritsch Trichomes between 7-9.5 micrometers in width. Terminal cell swollen and often | algdescr.doc | | | | | | with a calyptra. Cells narrow with a distinct light-dark pattern. Necridia common (1-5) | | | | | | | within each trichome. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Oscillatoria koettlitzi | G | Fritsch Trichomes between 7-9.5 micrometers in width. Similar to Morphotype E but with | algdescr.doc | | | | | | much shorter cell length. Terminal cell swollen. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Oscillatoria koettlitzi | H | Fritsch Trichomes between 8-10 micrometers in width. Dense cells with a dark, refractory | algdescr.doc | | | | | | surface and no apparent sheath. Terminal cells often capitate with no visible calyptra. | | | | | | | Distinct constrictions at the cell walls. Necridia rare. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Phormidium autumnale | I | (Agardh) Gomont Trichomes between 4-6 micrometers in width and often with a slight | algdescr.doc | | | | | | terminal hook. Variable position and quantity of granules. Terminal cell with a | | | | | | | calyptra. Could be independent trichomes of Microcoleus vaginatus. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Phormidium autumnale | J | (Agardh) Gomont Trichomes between 2.5-3.5 micrometers in width. Generally, cell walls | algdescr.doc | | | | | | clearly visible; granules rare. Terminal cell with a calyptra. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Phormidium autumnale | K | Gomont Trichomes between 2-3.5 micrometers in width. Nearly identical to Morphotype J | algdescr.doc | | | | | | except that trichomes arose from a common "clump". Trichomes also appeared to taper | | | | | | | slightly at the terminal end. Rare occurrence. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Phormidium frigidum & | L | Gomont (P. frigidium) / W & G.S. West (O. deflexa) Trichomes all less than 2.5 | algdescr.doc | | | | Oscillatoria deflexa | | 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. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Oscillatoriaceae | Microcoleus vaginatus | M | (Vaucher) Gomont Trichomes between 4-6 micrometers in width. Nearly identical to | algdescr.doc | | | | | | 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. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Rivulariaceae | Calothrix cf. intricata | | Fritsch Distinct, thick (1-8 micrometers), yellow sheaths surround these trichomes. | algdescr.doc | | | | | | 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]. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Prasiolaceae | Prasiola calophylla | | (Carmichael) Meneghini Young thalli consisting of uniseriate filaments 8-15 micrometers | algdescr.doc | | | | | | 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. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Prasiolaceae | Prasiola crispa | | (Lightfoot) Meneghini This species most closely matched the description given by Fritsch | algdescr.doc | | | | | | [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. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Nostocaceae | Nostoc spp. | | Ranged in growth from individual trichomes to dense, irregularly shaped colonies. | algdescr.doc | | | | | | 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. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Nostocaceae | Nodularia cf. harveyana | | Thuret Trichomes 4-6 micrometers wide with no visible sheath. Cells 3-5 micrometers | algdescr.doc | | | | | | long and terminal cell slightly conical. Heterocysts large (5-8 micrometers long) and | | | | | | | circular. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Chroococcaceae | Chroococcus cf. minutus | | (Kutzing) Nageli Spherical cells, 5-8 micrometers in diameter. Cells surrounded by a | algdescr.doc | | | | | | 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. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Chroococcaceae | cf. Gloeocapsa kuetzingiana | | Nageli Generally, a dark orangish brown colony of individual cells, 2-5 micrometers in | algdescr.doc | | | | | | diameter. Cells arranged irregularly in a mucilaginous sheath. Colonies ranged from 6-78 | | | | | | | micrometers in width and contained 3-100+ cells. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Chroococcaceae | Gloeocapsa sp. | | Cells ovoid-ellipsoidal, 1-3 micrometers in width, and contained within a sheath. Colonies | algdescr.doc | | | | | | spherical with 1-5 cells, often found growing adjacent to other colonies. Rare. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Mesotaeniaceae | Actinotaenium cf. cucurbita | | (Brebisson) Teil Cells 25-33 micrometers by 13-20 micrometers. Rounded hemi-cell with a | algdescr.doc | | | | | | slight median constriction. One chromatophore per half cell with four ribs and a | | | | | | | central, spherical pyrenoid. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Palmellaceae | Asterococcus sp. | | Spherical cells, 3 micrometers in diameter, found in a common gelatinous matrix. Each | algdescr.doc | | | | | | cell with an asteroidal chloroplast with arms radiating from a central pyrenoid. Rare. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Ulotrichaceae | cf. Binuclearia tectorum | | (Kutzing) Beger Long, uniseriate filaments with cells 6-11 micrometers in width and 8-13 | algdescr.doc | | | | | | micrometers long. Filaments surrounded by a mucilaginous sheath. Cells with a parietal | | | | | | | chloroplast and a distinct pyrenoid. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | MRPHTYPE | Chlorellaceae | Chlorella sp. | | Globular, mucilaginous colonies, 8-10 micrometers in width, consisting of several | algdescr.doc | | | | | | (approximately 20) green, spherical cells, 1-2 micrometers in diameter. Rare. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------