Eunotia mucophila

(Lange-Bertalot, Nörpel-Schempp and Alles) Lange-Bertalot in Metzeltin et al. 2005      Category: Eunotioid
BASIONYM: Eunotia bilunaris var. mucophila Lange-Bertalot, Nörpel-Schempp and Alles in Alles et al. 1991

REPORTED AS: Eunotia curvata var. subarcuata (Camburn & Charles 2000, Pl. 12, Figs 10-16) 

Eunotia montuosa

 

Eunotia mydohaimasiae

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Jana Veselá - March 2017
Length Range: 18-52 µm
Width Range: 1.9–2.3 µm
Striae in 10 µm: 21–26

Description

Valves are slender, arcuate and lightly silicified, giving them a faint appearance. Margins are parallel throughout the valve, that is, valve width is constant. Apices are rounded, indistinctly subcapitate and helictoglossae are small. Distal raphe fissures are extremely short, terminating in helictoglossae, and practically invisible in LM. Striae are parallel and perpendicular to the valve margins, sometimes slightly radiate near the apices, but not always well visible due to light silicification. One rimoportula is present per valve, situated near the helictoglossa at the apex (not visible in LM). Both internal and external expression of the areolae are rounded and open.



Original Description

Basionym: Eunotia bilunaris var. mucophila
Author: Lange-Bertalot, Nörpel-Schempp and Alles in Alles et al. 1991
Length Range: 10–70 µm
Width Range: 1.9–2.7(3) µm
Striae in 10 µm: 20–28

Original Description

Eunotia bilunaris var. mucophila Lange-Bertalot, Nörpel et Alles nov. var. TafeI, V, Fig. 12-21

Konspezifisch sind: Eunotia lunaris var. subarcuata Nägeli ex Kützing sensu auct. nonnull., Eunotia naegelii Migula (syn. E. alpina Nägeli) sensu auct. nonnuIl.

Beschreibung und Abgrenzung der Varietät:

Varietas nova similitudinem habet cum var. bilunaris sed angustior ad latitudinem, 1,9-2,7(3) µm, et striis transapicalibus densior positis, 20-28 in 10 µm. Fissura terminalis raphae non recurvata ad proximam partem vaIvae. Area terminalis raphae, id est linea hyalina in planitie interna valvarum, abest. Habitat (semper?) in muco algarum diversarum, exempli causi Batrachospermum et Sirodotia.

Holotypus: Botanisches Institut der Universität Frankfurt am Main, Coll. Lange-Bertalot, Probebezeichnung: Alles & Nörpel 010.0.C-5 vom 18.7.89 (Tafel V, Fig. 17-20). Fundort des Holotypus: Schurmsee im Schwarzwald, Rotalgen (Sirodotia).

Schalenumrisse im Zuge des Entwicklungszyclus grudsätzlich ähnlich wie bei den meisten Sippen, die der Nominatvarietät zugeordnet werden, jedoch mit stets geringerer Breite. Länge: 10 bis über 70 µm; Breite: 1,9 bis 2,7(3) µm.

Rücklaufende Terminalspalten im LM niemals erkennbar, im REM einen kurzen Bogen bildend, der nur ansatzweise einen Rücklauf andeutet. Eine hyaline Area unterhalb der Terminalspalte auf der Schaleninnenfläche ist allenfaIIs andeutungsweise erkennbar. Striae: 20-28/10 µm.

Original Images


Cite This Page:
Veselá, J. (2017). Eunotia mucophila. In Diatoms of the United States. Retrieved November 19, 2017, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_mucophila

Species: Eunotia mucophila

Contributor: Jana Veselá

Reviewer: Paula Furey

Citations

Alles, E., Nörpel-Schempp, M. and Lange-Bertalot, H. (1991). Taxonomy and ecology of characteristic Eunotia species in headwaters with low electric conductivity. Nova Hedwigia. 53: 171-213.

Camburn, K.E. and Charles, D.F. (2000). Diatoms of Low-Alkalinity Lakes in the Northeastern United States. Academy of Natural Sciences of Philadelphia, Special Publication 18, 152 pp.

Gaiser, E.E. and Johansen, J. (2000). Freshwater diatoms from Carolina bays and other isolated wetlands on the Atlantic Coastal Plain of South Carolina, USA, with descriptions of seven taxa new to science. Diatom Research 15(1): 75-130. 10.1080/0269249X.2000.9705487

Krammer, K. and Lange-Bertalot, H. (1991). Bacillariophyceae. 3. Teil: Centrales, Fragilariaceae, Eunotiaceae. In Ettl, H., Gerloff, J., Heynig, H. & Mollenhauer, D. (Eds.). Süsswasserflora von Mitteleuropa. 2(3): 1-576. Gustav Fisher Verlag, Stuttgart, Germany.

Lange-Bertalot, H., Bak, M., Witkowski, A. and Tagliaventi, N. (2011). Eunotia and some related genera. Diatoms of the European Inland Waters and Comparable Habitats. 6: 747 pp.

Metzeltin, D., Lange-Bertalot, H. and García-Rodríguez, F. (2005). Diatoms of Uruguay. Compared with other taxa from South America and elsewhere. In: H. Lange-Bertalot (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 15. Taxonomy-Biogeography-Diversity. A.R.G. Gantner Verlag K.G. 15:736 pp.

Siver, P.A., Hamilton, P.B., Stachura-Suchoples, K. and Kociolek, J.P. (2005). Diatoms of North America. The Freshwater Flora of Cape Cod. Iconographia Diatomologica 14: 1-463.

Links & ID's

Index Nominum Algarum (INA)

Original INA
Transfer INA

California Academy of Sciences (CAS)

Eunotia mucophila CAS

North American Diatom Ecological Database (NADED)

NADED ID: 33267

Autecology Discussion

In North America, with E. mucophila was observed in acidic lakes of Acadia National Park, Maine (personal observations), the Adirondacks Mountains of New York (Camburn & Charles 2000), Cape Cod, Massachusetts (Siver et al. 2005) and South Carolina (Gaiser & Johansen 2000). This species is also found in peat bogs and dystrophic lakes of the Holarctic region (details in Lange-Bertalot et al. 2011, p. 165).