Lindavia eriensis
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Category
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Diameter18-48 µm
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Striae in 10 µm10 to 14 based on circumferential density
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SynonymsCyclotella americana Fricke in Schmidt et al. 1900
Stephanodiscus americana (Fricke) Amossé 1975
Cyclotella eriensis Houk et al. 2010
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ContributorMark Edlund, David R.L. Burge - Dec 2016
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ReviewerJeffery Stone - Jun 2017
Identification
Description
Valves with a strong concentrically undulate face resulting in concave, or convex, centers. The strongly concave or convex portion of the valve face comprises the central 1/3 of the central area. Valve ornamentation consists of two parts; radially arranged areolae in the central area and alveolate striae at the margin. The radial rows of areolae in the valve center generally correspond with an alveolate stria at the margin. A few central areolae are grouped at the center by a weakly defined annulus. Numerous central fultoportulae occur in a loose ring around the raised or sunken valve center and appear slightly larger in comparison to areolae. The central area covers 50% to 65% of the valve diameter and is defined by the terminus of the marginal alveolate striae. The alveolate striae terminate evenly at the central area, often branching on the valve face, and bifurcate at the valve face-mantle junction. The total number of alveolate stria decreased with valve diameter (e.g. diameter, total stria count: 48, 196; 18, 72), and as a result, the stria density remained similar throughout the size series (e.g. diameter, circumferential stria density in 10 µm: 48, 13; 18, 13). On the valve face, 2 to 4 rimoportulae occur at the end of a shortened alveolate striae. Marginal fultoportulae occur on every 2-3 costae, represented by shadow lines, or Schattenlinien.
This taxon was originally described as Cyclotella americana by Fricke in Schmidt et al. (1900) and then transferred to Stephanodiscus americana (Fricke) Amossé (1975). Since the name C. americana was already occupied by Cyclotella americana Kützing (1849), Fricke’s name was illegitimate and Houk et al. (2010) provided a new legitimate name, C. eriensis, and lectotypification. Later Nakov et al. (2015) transferred C. eriensis to the current accepted name Lindavia eriensis.
Lindavia eriensis is an extinct diatom species that was endemic to the lower Great Lakes before being extirpated in the late 1800s following Euro-american settlement and development in the Great Lakes basin (Stoermer et al. 1996).
Autecology
Lindavia eriensis is considered to be extinct. The species is only known from early collections and in the sediment records of Lake Erie (Stoermer et al. 1996) and Lake Ontario. It is thought to have been extirpated by anthropogenic-driven changes to the lower Great Lakes that included accelerated nutrient loading and loss of the deep-chlorophyll layer community, due to decreased light penetration and summer silica limitation, where this diatom is thought to have lived.
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Size Range, µm3
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Motility
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Habitat
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Colony
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Waterbody
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Original Description
Cells cylindrical, circular, 12-50 µm in diameter, solitary. The valve faces are strongly concentrically undulate, with convex or concave central area. Striae 13-15 in 10 µm of nearly equal length, striated marginal area takes 1/3-1/2 of the valve diameter with the classic striation pattern for complex alveolar structure (in LM). The alveoli are internally occluded with a marginal and central lamina, internal alveolar openings between thickened ribs are relatively small. The complex internal structure has alternating one thin costa, typically bifurcating near the valve edge within the alveolar chambers, between 2 thickened ribs. Each rib bears one marginal fultoportula ('Schattenlinen') near the valve margin, with two satellite pori positioned laterally. 2-4(5) distinct rimoportulae are located at the end of shortened striae in the hyaline part ('flammende Punkte'). Rimoportulae have a simple external opening, internally a large, stalked elongated labium and a wide oblique or oriented nearly circumferentially slit.
The central area is strongly concentrically (radially) undulate, convex or concave with areolae and central fultoportulae. Almost every radial row of areolae is associated with one stria that continues in the radial line in marginal area. The central fultoportulae, externally with a small opening and internally with three satellite pori, are scattered among areolae mostly around the poorly defined annular ring. A field of areolae with a domed cribra is surrounded by a hyaline ring (annulus) in the valve center. The girdle band is smooth, composed of several copulae.
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BasionymCyclotella eriensis
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AuthorHouk, R. Klee, and H. Tanaka 2010
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Length Range12-50 µm
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Striae in 10µm13-15
Original Images
Citations & Links
Citations
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Publication Link: 10.11646/phytotaxa.217.3.2
Cite This Page
Edlund, M., Burge, D. (2016). Lindavia eriensis. In Diatoms of North America. Retrieved December 21, 2024, from https://diatoms.org/species/51968/lindavia_eriensis
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Lindavia eriensis from all the stream reaches where it was present. Note that the relative abundance scale is the same on each plot. Explanation of each environmental variable and units are as follows:
ELEVATION = stream reach elevation (meters)
STRAHLER = distribution plot of the Strahler Stream Order
SLOPE = stream reach gradient (degrees)
W1_HALL = an index that is a measure of streamside (riparian) human activity that ranges from 0 - 10, with a value of 0 indicating of minimal disturbance to a value of 10 indicating severe disturbance.
PHSTVL = pH measured in a sealed syringe sample (pH units)
log_COND = log concentration of specific conductivity (µS/cm)
log_PTL = log concentration of total phosphorus (µg/L)
log_NO3 = log concentration of nitrate (µeq/L)
log_DOC = log concentration of dissolved organic carbon (mg/L)
log_SIO2 = log concentration of silicon (mg/L)
log_NA = log concentration of sodium (µeq/L)
log_HCO3 = log concentration of the bicarbonate ion (µeq/L)
EMBED = percent of the stream substrate that is embedded by sand and fine sediment
log_TURBIDITY = log of turbidity, a measure of cloudiness of water, in nephelometric turbidity units (NTU).
DISTOT = an index of total human disturbance in the watershed that ranges from 1 - 100, with a value of 0 indicating of minimal disturbance to a value of 100 indicating severe disturbance.
Lindavia eriensis
- Valve face strongly undulate
- Rimoportulae 2-4
- Central area covers 1/2 of valve diameter
- Marginal fultoportulae every 2-3 costae
Valves are concave or convex, with a strong concentrically undulate valve face. Valve face with 2-4 rimoportulae. Central area covering approximately 1/2 of the valve diameter. Marginal fultoportulae are seen as shadow lines near the valve margin, positioned on every 2-3 costae. This species is considered to be extinct.