Observaciones de sydski

Scale bar- 10 µm
This is a symmetric biraphid diatom. The poles of the diatom are rostate. The marginal morphology is elliptical lanceolate. The raphe is slightly curved. The striae are curved radiate and shorten at the center. The striae are widely spaced.

Scale bar- 10 µm
This is a symmetrical biraphid diatom. The marginal morphology is lanceolate. The poles of the diatom are protracted. Wide center, oval central area. The areole are linearate. The striae are curved radiate and round. The habitat is benthic and the sample was taken from the sediment from Little Sioux River Bridge.

Scale bar- 10 µm
This is a symmetric biraphid diatom. The poles of the diatom is broadly rounded. The marginal morphology is elliptical lanceolate. The striae are linear, radiate and wide. Some of the striae shorten at the center.

Scale bar- 10 µm
This is a symmetrical biraphid diatom. The poles of the diatom is sub-capitate. The marginal morphology is elliptical lanceolate. The striae are radiate towards the center. The striae are wide and heavily silicified. Its habitat is benthic.

Scale bar- 10 µm
This is an araphid diatom, has no raphe present. The poles of the diatoms are sub-capitate. The marginal morphology is linear. The center of the margin is expanded on one side. There are ghost striae in the center. The striae are parellel and alternate and widely spaced. Their habitat is benthic and was found in a sample that was from scraping of a rock in the Beck's Canal.

Scale bar- 10 µm
This diatom is an araphid, there is no raphe present. The center of the diatom is narrow and gets wider towards the poles. The poles of the diatom is sub-capitate. The marginal morphology is linear lanceolate. The striae are parallel and there is no striae present in the center.

Scale bar- 10 µm
This is a Surirelloid diatom. The middle section has the shortest width and the ends have the longest width. The raphe runs along the edge of the diatom. Striations between the ribs are very fine. The ends of the diatom is broadly apiculate. The striae are very fine. This species has a wide range and the valves can get very large, up to 280 µm.

Scale bar- 10 µm
This is a centric diatom. Most of them in the sample were in girdle view. There are spiral rows of areolae are curved. The areolae are round. There are short linking spines at the end of the diatom. Its habitat is planktonic and it was found in a benthic fall out sample.

Scale bar- 10µm
This diatom is an asymmetrical biraphid. It is asymmetrical on the apical axis and symmetrical on the transapical axis. The foot pole is acutely rounded and the head pole is more broadly rounded. There is a stigma at the center. The marginal morphology is lanceolate-clavate. The striae is curved radiate through out the diatom

Scale bar- 10 µm
This is a centric diatom. The valve is face is flat, there two to three fultoportulae on the mantle. There are distinctive marginal chambered striae around the diatom. The mantle has little orientation. Its habitat is planktonic and is common in shallow and nutrient rich waters.

Scale bar- 10µm
This diatom is an asymmetrical biraphid. It is asymmetrical on the transapical axis and symmetrical on the apical axis. The head pole is apiculate and the foot pole is acutely rounded. At the foot pole and central area the striae are radiate towards the center of the diatom. The marginal morphology is cuneate. The head pole of the diatom is wide and it gets narrower towards the footpole. The head pole the striae radiate towards the center of the head pole. It is a benthic diatom and it was found in a planktonic sample in the Beck's Canal.

Scale bar-10 µm
This diatom is symmetric biraphid. The poles of the diatom are broadly rounded. The marginal morphology is linear elliptical. The striae are parallel, at the center there is a gap in the striae. One side of the diatom has a slightly bigger gap than the other. This diatom habitat is benthic and was found on a plant at Silver Lake Fen.

Scale bar- 10 µm
This diatom is centric. There is no orientation in the center of the diatom it is very plain looking. There were a lot of them in the sample and many of them were in girdle view. This diatom was found in a sample that was from scraping of a rock at Triboji Beach

Scale bar- 10 µm
This diatom is a epithemioid. The diatom is symmetrical on the transapical axis and asymmetrical on the apical axis. There is a central arch in the middle of the diatom. The dorsal marginal morphology is convex. The poles of the diatom are acutely rounded. The costae and striae are visible on the diatom. They are mostly found in low nitrogen and phosphorus waters and are considered a nitrogen fixer. Their habitat is benthic and it was found in a sample that was taken at the surface sediment at Beck's Canal.

Scale bar- 10 µm
This diatom is an asymmetrical biraphid, it distinctively asymmetrical on the transapical axis and slightly asymmetrical on the apical axis. This diatom is large and can be over 100 µm in length. It is a very distinctive diatom., there is only one species found in this genus in The head pole is sub-capitate and the foot pole is broadly rounded. Over most of the diatom, the striae are radiate towards the center but at the head pole the striae radiate to the edge of the diatom. Can easily see the apical pore field. There are three stigmata at the center of the diatom. It attaches by a stalk to benthic substrates in flowing waters and splash zones of lakes. The stalks can be very visible on rocks. They are becoming known as invasive.

Scale bar -10 µm
This diatom is a symmetric biraphid. The marginal morphology of the diatom is elliptical. The striae are punctate. The striae radiate from the center of the diatom. The raphe endings at the center of the diatom deflect toward each other, otherwise they are straight. This diatom was found in a planktonic sample in Millers Bay at West Lake Okoboji.

Scale bar- 10 µm
This diatom is a surirelloid, the raphe is surrounding the edges of the diatom. The poles of the diatom are acutely rounded. The marginal morphology is linear elliptical. The surface of the diatom is very rough looking because the costae raises up and down throughout the diatom. They are considered a highly motile and a benthic diatom. This diatom was found in sample that was scraped from a branch in Silver Lake.

Scale bar-10 µm
This diatom is an araphid. The poles of the diatom are sub-capitate. Some morphology of this diatom is asymmetrical and or symmetrical on both or either the transapical and apical axis. The striae are parallel throughout the diatom. The valve shape has an hourglass look. They are considered planktonic and benthic. This diatom was found in a sample that was scraped from a rock at Triboji Beach.

Scale bar-10 µm
This diatom is monoraphid. One of the biggest distinguishable characteristic is that on the edges of the center of the diatom there is a gap in the striae. The gap on one side of the diatom is bigger than the other. The poles of the diatom are truncated. Some of diatoms had an elliptical lanceolate or a linear elliptical marginal morphology. The striae are radiate at the poles become slightly radiate and parallel closer to the center.

Scale bar- 10 µm
This diatom is a symmetrical biraphid. The poles of the diatom are acutely rounded. The marginal morphology has a very clear sigmoid shape. The striae is punctae the that are parallel. At the center of the diatom the striae are curved around the center. The diatom was found from a sample from a branch in silver lake

Scale bar -10 µm
This diatom is a symmetrical biraphid. The ends of the diatom are sub-capitate. The morphology is rhombic lanceolate. The striae are curved radiate toward the center of the diatom. Within the sample the width has a wide range but the length and the number of striae per 10 µm is consistent. The sample was taken with a plankton tow at Millers Bay at West Lake Okoboji.

Scale bar- 10µm
This diatom is an asymmetrical biraphid.. It is symmetrical on the transapical axis and asymmetrical on the apical axis. In the sample they were abundant, they are relatively small and in close in length and width range. The ends are small and curved and the striae are radiate. In a wet mount, diatom specimen were surrounded by tubs. This makes it very clear that the genera was Encyonema. They are found in low nutrient , conductivity, and alkaline waters. They are benthic and were found in a sample that was scraped from a rock.