Salpingoeca ventriosa
Jeuck, Arndt & Nitsche, 2014
Most likely ID: n.a.
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Synonym: n.a.
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Sampling location: Simmelried
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Phylogenetic tree: Salpingoeca ventriosa
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Diagnosis:Â
- lorica flask-shaped, posterior half pot-bellied, anterior neck funnel-shaped
- bottom of lorica flat
- length (of lorica) 7.8 µm, width 6.8 µm
- one single flagellum
- nucleus 2.2–3.1 µm in diameter with central nucleolus
- collar consisting of 23–30 microvilli, extend beyoend neck
- contractile vacuole in posterior third
I have only found a few specimens of Salpingoeca ventriosa so far. All of them from the Simmelried, where I found the species in 2006 and 2015. I have not documented any further finds since then.
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Salpingoeca ventriosa was first found in Greenland and described by Jeuck, Arndt & Nitsche in 2014. In the original description, the length of the lorica is given as 7.8 µm. The loricae of my specimens were larger with a length of 9 µm and 15 µm and the funnel-shaped neck was also longer (s. figs. 1 and 2 a-b). As only a few specimens have been found so far, it is not yet possible to make any statements about the variability within the species.
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Salpingoeca ventriosa differs from the similar species Salpingoeca marssonii by the funnel-shaped expansion of the neck. In Salpingoeca marssonii it is cylindrically straight, without a enlarged aperture.
Fig. 1: Salpingoeca ventriosa. L = 15 µm (of lorica). Two specimens found in January 2015 in the Simmelried. CO = collar of microvilli, CV = contractile vacuole, F = flagellum. Obj. 100 X.
Fig. 2 a-b: Salpingoeca ventriosa. L = 9 µm (of lorica). Two focal planes of a specimen foud in April 2006 in the Simmelried. The images were taken with hight layer thickness. Obj. 100 X.