taxonID	type	description	language	source
9A71879BA34BFFBFFF05FAD5EE65F9D7.taxon	description	Description: — Valves are slightly dorsi-ventral, elongate, with broadly rounded and obliquely rostrate apices that are deflected slightly towards the dorsal margin (Figs 1 – 8). Valves range in length from 26 – 68 µm with a mean of 39 µm, and in diameter from 3.2 – 6.5 µm with a mean of 3.7 µm (n = 40). The ventral margin is slightly concave, becoming almost linear on smaller valves, and is more or less parallel with the dorsal margin, and of equal diameter throughout except at the apices. Small spines may be present on the virgae between the striae on the valve margin. Striae range from 16 – 25 per 10 µm, with a mean of 22. Striae are evenly spaced, parallel over most of the valve, becoming more closely spaced towards the apices (Figs 1 – 8). Striae are continuous from the valve face onto the mantle on both the ventral and dorsal sides (Figs 10, 12 – 14). Areolae are small, circular, closely spaced, and open on both the external and internal valve surfaces. The mantle is deep, approximately 3.5 – 4 µm, and forms a right angle with the valve margin on both the ventral and dorsal sides (Figs 11 – 14). The margin of the mantle is thickened around each apex (Figs 10, 12). The proximal end of the raphe commences midway down the mantle (Figs 13 – 14). From this point, the raphe rises slowly until it reaches the valve margin, then turns approximately 45 º up onto the valve face, terminating midway across the valve face close to the apex. The portion of raphe on the valve face is straight and the distal end is not curved or recurved (Figs 9, 11). A distinct hyaline zone extends approximately 3 µm from the proximal end of the raphe towards the center of the valve (Figs 13 – 14), is continuous along the lower side of the raphe, and extends up onto the valve face terminating near the apex. The striae are more closely spaced on the mantle below the raphe (Figs 13 – 14), and a discontinuity zone is often observed midway along the raphe. Internally, the distal raphe fissure terminates within a thick and well-formed helictoglossa (Figs 10, 12), which in turn is surrounded by a hyaline zone. A single rimoportula is found at one of the valve apices (Fig. 12).	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
9A71879BA34BFFBFFF05FAD5EE65F9D7.taxon	materials_examined	Type: — CANADA. Lac de Gras kimberlite field region, Northwest Territories: Rock specimen sub sampled from section 16 - 3 - 42 of the Giraffe Pipe core (holotype circled specimen on slide “ GP 16 - 3 - 42 B ” Canadian Museum of Nature CANA 129307 = Fig. 7. Isotype circled specimen on slide “ GP 16 - 3 - 42 C ” P. Siver’s personal collection = Fig. 5).	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
9A71879BA34BFFBFFF05FAD5EE65F9D7.taxon	etymology	Etymology: — The species epithet refers to the type locality.	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
9A71879BA34AFFB9FF30F9EDEC1AF9B2.taxon	description	Description: — Valves are dorsi-ventral, elongate, widest in the middle of the valve, and becoming tapered and drawn out at the apices forming protracted ends (Figs 15 – 21). The ventral margin is concave, becoming slightly linear at the apices. The dorsal margin is more convex relative to the concave ventral margin such that the valve becomes progressively narrower from the center to the apices (Figs 24 – 27). Valves range in length from 19.6 – 57.6 µm with a mean of 38 µm, and in diameter at the valve center from 2.9 – 5.1 µm with a mean of 3.8 µm (n = 25). At the apices, valve width ranges from 1.5 – 2.2 µm, with a mean of 1.8 µm. The margins of the valve face, especially along the ventral side, are slightly thickened and form right angles with the mantle (Figs 23 – 24). Striae are parallel, widely spaced with 13.5 – 19 per 10 µm, a mean of 16 µm, and consist of small, circular areolae that are opened on both the external and internal valve surfaces. Striae are continuous from the valve face onto the dorsal mantle, but may be interrupted and discontinuous with those on the ventral mantle (Figs 23 – 24). On smaller valves, the areolae on the ventral mantle may become more randomly spaced, especially below the raphe branches (Fig. 23). The mantle is shallow, approximately 1.5 – 2 µm, and the margin slightly thickened around each apex. The proximal end of the raphe commences near the middle of the mantle approximately 1 / 4 to 1 / 3 of the valve length from the apex, rises slowly on a linear path to the valve margin, and then bends up and onto the valve face terminating close to the end of the valve (Figs 23, 25). The proximal and distal raphe fissures both terminate as small round pores (Figs 23 – 25). On most specimens, the portion of the mantle below the raphe consists of short striae composed of a few pores, but on some valves the pores are randomly spaced and not organized into distinct striae. Internally, the distal raphe fissure terminates within a small helictoglossa positioned about 1 / 3 the distance across the valve face (Figs 26 – 27). A single rimoportula is found on one of the valve apices.	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
9A71879BA34AFFB9FF30F9EDEC1AF9B2.taxon	materials_examined	Type: — CANADA. Lac de Gras kimberlite field region, Northwest Territories: Rock specimen sub sampled from section 15 - 3 - 75 of the Giraffe Pipe core (holotype circled specimen on slide “ GP 15 - 3 - 75 D, LM 5 ” Canadian Museum of Nature CANA 129308 = Fig. 17. Isotype circled specimen on slide labeled “ GP 15 - 3 - 75 LM 4 ” P. Siver’s personal collection = Fig. 21).	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
9A71879BA34AFFB9FF30F9EDEC1AF9B2.taxon	etymology	Etymology: — The name refers to a hat, whereby smaller specimens give the impression of a hat worn, for example, by Napoleon.	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
9A71879BA34CFFBBFF30F940ECC0F8D8.taxon	description	Description: — Valves are long and narrow, linear to slightly lunate, and with slightly protracted apices (Figs 28 – 35). Valves range in length from 44 – 91 µm with a mean of 64, and in diameter from 2.4 – 4.3 µm with a mean of 3.4 (n = 30). The ventral and dorsal margins are more or less parallel resulting in a similar diameter over most of the valve. Small spines are present on the virgae along both valve margins, and often around the apices (Figs 36 – 38, 40 – 41). Striae are evenly spaced, parallel, continue from the valve face onto the mantle, range in density from 17 – 20 per 10 µm and a mean of 19. Areolae are small, circular, closely spaced, and open on both the external and internal valve surfaces (Fig. 36 – 41). The mantle is shallow, often not more than 1 µm in depth, and forms a right angle with the valve margin on both the ventral and dorsal sides (Figs 38 – 39, 41). The raphe is approximately 6.5 – 8 µm long. The proximal end of the raphe is positioned near the bottom of the ventral mantle, rises on a more or less 45 º linear path, curves up onto the valve face, and with the distal end terminating in a small pore about 1 / 3 the distance across the valve face (Figs 36, 38, 40). Internally, the raphe is slightly elevated from the mantle, especially near the proximal end, and the distal end terminates within a small, well-formed, helicoglossa (Figs 37, 39). The striae below the raphe are typically reduced to a single row of pores (Figs 37, 39). Internally, the distal raphe fissure terminates within a thick and well-formed helictoglossa, which in turn is surrounded by a hyaline zone (Figs 37, 39). A single rimoportula is found per valve (Figs 37, 39).	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
9A71879BA34CFFBBFF30F940ECC0F8D8.taxon	materials_examined	Type: — CANADA. Lac de Gras kimberlite field region, Northwest Territories: Rock specimen sub sampled from section 16 - 3 - 42 of the Giraffe Pipe core (holotype circled specimen on slide “ GP 16 - 3 - 42 E ” Canadian Museum of Nature CANA 129309 = Fig. 31).	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
9A71879BA34CFFBBFF30F940ECC0F8D8.taxon	etymology	Etymology: — The name refers to the similarity in shape with Eunotia naegelii, but reflects the fact they are not the same organism.	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
9A71879BA34CFFBBFF30F940ECC0F8D8.taxon	biology_ecology	Co-occurring organisms: — The extensive portion of the core harboring all three of the new Eunotia species contained other species of Eunotia, species of the closely related genus, Actinella, and extensive concentrations of chrysophyte microfossils. In addition to numerous and many types of chrysophyte cysts, remains of three synurophytes, Mallomonas lychenensis Conrad (1938: 1), M. porifera Siver & Wolfe (2005 b: 300) and Synura cronbergiae Siver (2013: 181) were also dominant throughout this section of the core. Remains of euglyphid testate amoebae and sponge spicules were consistently present as well, but in smaller numbers relative to lower sections representing earlier time periods in the history of the lake.	en	Siver, Peter A., Oddsund, Erik, Lott, Anne M. (2022): Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567 (1): 21-35, DOI: 10.11646/phytotaxa.567.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.567.1.2
