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Eoseira (diatom)
Taxonomy
Eoseira was named by Wolfe and Edlund (2005). Its type is Eoseira wilsonii. It was considered monophyletic by Wolfe and Edlund (2005).
It was assigned to Aulacoseiraceae by Wolfe and Edlund (2005).
It was assigned to Aulacoseiraceae by Wolfe and Edlund (2005).
Species
E. wilsonii (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2005 | Eoseira Wolfe and Edlund |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Eoseira Wolfe and Edlund 2005 [diatom]
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†Eoseira wilsonii Wolfe and Edlund 2005 [diatom]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. P. Wolfe and M. B. Edlund 2005 | Frustules and valves cylindrical, rectangular in girdle view, circular in valve view. Frustules joined valve face to valve face in filaments by broad, flattened marginal spathulate linking spines with apiculate ends. Terminal valves of filaments with broad, flattened lanceolate to broadly ovate separation spines. Spines located circumferentially along the valve face-mantle junction; spines seated on neighboring valves in broad, flat grooves shaped identically to its corresponding separation or linking spine. Areolae on mantle with small round external openings, arranged in straight, parallel pervalvar striae. Single or paired interstriae do not form the linking and separation spines as in the genus Aulacoseira. Rather, spines on Eoseira show no morphogenetic or geometric relation to mantle striae and interstriae. Areolae on mantle and valve face occluded by internal vela. Valves with welldeveloped annular pseudoseptum or Ringleiste. Valves bordered by a smooth, non-areolate collum. Multiple sessile rimoportulae widely scattered on internal mantle wall from the advalvar edge of Ringleiste to the junction of valve face and mantle (Abfallzone). Cingulum comprises numerous open ligulate copulae with fine poroids aligned in pervalvar rows. |
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||