Epithemia musculus
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Category
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Length Range12-60 µm
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Width Range10-16 µm
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Striae in 10 µm14-18
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SynonymsCystopleura musculus (Kütz.) Kuntze 1891
Rhopalodia gibberula var. musculus (Kütz.) A.Cleve 1952
Rhopalodia musculus (Kütz.) O. Müller 1900
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ContributorPat Kociolek - Mar 2011
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ReviewerRex Lowe - Oct 2011
Identification
Description
Valves of this species are semi-elliptic. Valves are strongly convex along the dorsal margin and concave along the ventral margin, tapering to narrowly rounded ends. The raphe is located in the canal along the dorsal margin. Distinct costae on the valve face number 3-5 in 10 µm. Striae form 2-4 rows between the costae.
Autecology
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Size Range, µm3
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Motility
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Attachment
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Habitat
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Colony
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Occurrence
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Nitrogen Fixer
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BCG
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Waterbody
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Distribution
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Original Description
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BasionymEpithemia musculus
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AuthorKütz. 1844
Original Images
Citations & Links
Citations
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Publication Link: 10.1080/0269249X.2024.2388108
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Publication Link: 10.1016/j.ympev.2016.07.023
Links
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Index Nominum Algarum
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North American Diatom Ecological DatabaseNADED ID: 58006
Updates
May 16, 2020 - Revision to previous name
From 2011 to May 2020, this species appeared as Rhopalodia musculus Kütz., which had been its accepted name. Phylogenetic analysis of diatoms with a canal raphe system showed that the genus Rhopalodia is not a monophyletic group (Ruck et al. 2016). In order for the classification to reflect evolutionary relationships, the least disruptive way to achieve the monophyly of taxa in this lineage was to subsume Rhopalodia into Epithemia. - M. Potapova
Cite This Page
Kociolek, P. (2011). Epithemia musculus. In Diatoms of North America. Retrieved December 21, 2024, from https://diatoms.org/species/46248/epithemia_musculus
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Epithemia musculus 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.
Epithemia musculus
- Ventral margin concave
- Length 12-60 µm
- Striae multiseriate
- Costae 3-5 in 10 µm
Valves semi-elliptical, strongly convex along the dorsal margin, concave along the ventral margin, tapering to narrowly rounded ends. Costae distinct, numbering 3-5 in 10 µm. Striae are in rows of 2-4 between the costae.