Neidiopsis wulffii
(Petersen) Lange-Bertalot in Lange-Bertalot & Genkal 1999 Category: Symmetrical biraphid
BASIONYM: Navicula wulffii Petersen 1924
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Loren Bahls - January 2012
Length Range: 39-48 µm
Width Range: 9.4-11.4 µm
Striae in 10 µm: 16-18
Description
Valves are linear-elliptic with broadly rostrate to subcapitate apices. A longitudinal line runs along each side of the valve close to the mantle. The axial area is narrow, barely wider than the raphe. The central area is circular and about one-half the width of the valve at center. The raphe is filiform with simple proximal ends that are deflected to the same side. Striae are strongly radiate in the middle, becoming parallel then weakly convergent near the apices. Areolae in the striae are somewhat elongate and distinct in LM, and number 20-24 in 10 µm.
Original Description
Basionym: Navicula wulffii
Author: Petersen 1924
Length Range: 35 µm
Width Range: 8.8 µm
Striae in 10 µm: 18
Original Description
Valve linear-lanceolate, rostrate-capitate, with very slightly triundulate margins. On each side a deep sulcus. L. 35 µ, b. 8,8 µ, striae 18 in 10 µ, radiate throughout, finely punctate. Fig. 1.
Original Images
Cite This Page:
Bahls, L. (2012). Neidiopsis wulffii. In Diatoms of the United States. Retrieved May 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/neidiopsis_wulffii
Species: Neidiopsis wulffii
Contributor: Loren Bahls
Reviewer: Sarah Spaulding
Image Credit: Loren Bahls
- Longitudinal hyaline line on each side of valve
- Valves linear-elliptic
- Proximal raphe ends deflected to same side
Neidiopsis wulffii has linear-elliptic valves without obvious marginal undulations. A longitudinal hyaline line is present on each side near the valve mantle. Proximal raphe ends are simple and deflected to the same side.
Compare
Neidiopsis levanderi has triundulate valves and straight proximal raphe ends.
Neidiopsis levanderi
Citations
Antoniades, D., Hamilton, P.B., Douglas, M.S.V. and Smol, J.P. (2008). Diatoms of North America: The freshwater floras of Prince Petrcik, Ellef Ringnes and northern Ellesmere Islands from the Canadian Arctic Archipelago. Iconographia Diatomologica 17.
Lange-Bertalot, H. (2001). Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia. Diatoms of Europe 2: 1-526.
Lange-Bertalot, H. and Genkal, S.I. (1999). Diatoms from Siberia I. Islands in the Arctic Ocean (Yugorsky-Shar Strait). Iconographia Diatomologica 6: 1-292.
Petersen, J.B. (1924). Freshwater-algae from the north coast of Greenland collected by the late Dr. Th. Wulff. Meddelelser om Gronland 64: 305-319.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 8998005
Autecology Discussion
Neidiopsis wulffii is uncommon in oligotrophic and very low-conductivity lakes and ponds of the Northern Rocky Mountains. In these habitats, pH ranges from 6.40 to 7.57 and specific conductance ranges from 7 to 16 µS/cm. Neidiopsis wulffii was recently reported from Arctic Canada in waters ranging from 18 to 134 µS/cm (Antoniades et al. 2008). Previously, this taxon was known only from the type locality in Greenland (Lange-Bertalot 2001).
Images
Kootenai Lake on the Waterton River, Glacier National Park, Montana: home of Neidiopsis wulffii.
Credit/Source: Loren Bahls