Lindavia eriensis

(V.Houk, R.Klee & H.Tanaka) Nakov, Guillory, M.L.Julius, E.C.Ther. & A.J.Alverson 2015      Category: Centric
BASIONYM: Cyclotella eriensis V. Houk, R. Klee, & H. Tanaka 2010
SYNONYM(S): Cyclotella americana Fricke | Stephanodiscus americana (Fricke) Amossé 

Lindavia delicatula

 

Lindavia intermedia

LM scalebar = 10 µm = 20 pixels.



Observations

Contributor: Mark Edlund | David R.L. Burge - December 2016
Diameter: 18-48 µm
Rows of areolae in 10 µm: 10 to 14 based on circumferential density

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).



Original Description

Basionym: Cyclotella eriensis
Author: V. Houk, R. Klee, & H. Tanaka 2010
Diameter: 12-50 µm
Rows of areolae in 10 µm: 13-15

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.

Original Images


Cite This Page:
Edlund, M., and Burge, D. (2016). Lindavia eriensis. In Diatoms of the United States. Retrieved November 19, 2017, from http://westerndiatoms.colorado.edu/taxa/species/lindavia_eriensis

Species: Lindavia eriensis

Contributor: Mark Edlund | David R.L. Burge

Reviewer: Jeffery Stone

Citations

Amossé, A. (1975). Liste Systématique des Diatomées de la Tranchée Charles X des Marais de Goulaine (Loire Atlantique). Bulletin de la Société des Sciences Naturelles de l'Ouest de la France (Nantes) 73(2-3): 77-83.

Houk, V., Klee, R. and Tanaka, H. (2010). Atlas of freshwater centric diatoms with a brief key and descriptions, Part III. Stephanodiscaceae A. Cyclotella, Tertiarius, Discostella. Fottea 10 (Supplement): 1-498.

Kützing, F.T. (1849). Species Algarum. Lipsiae. F.A. Brockhaus, 922 pp.

Nakov, T., Guillory, W.X., Julius, M.L., Theriot, E.C. and Alverson, A.J. (2015). Towards a phylogenetic classification of species belonging to the diatom genus Cyclotella (Bacillariophyceae): Transfer of species formerly placed in Puncticulata, Handmannia, Pliocaenicus and Cyclotella to the genus Lindavia. Phytotaxa 217 (3): 249–264. 10.11646/phytotaxa.217.3.2

Schmidt, A. (-). (1874-1959). Atlas der Diatomaceen-Kunde, von Adolf Schmidt, continued by Martin Schmidt, Friedrich Fricke, Heinrich Heiden, Otto Muller, Friedrich Hustedt. Reprint 1984, Koeltz Scientific Books, Konigstein, 480 plates.

Stoermer, E.F., Emmert, G., Julius, M.L. and Schelske, C.L. (1996). Paleolimnologic evidence of rapid recent change in Lake Erie’s trophic status. Canadian Journal of Fisheries and Aquatic Sciences 53: 1451–1458.

Links & ID's

Index Nominum Algarum (INA)

Transfer INA
Original INA

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion

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.