Halamphora coffeaeformis

(Agardh) Levkov 2009      Category: Asymmetrical biraphid
BASIONYM: Frustulia coffeaeformis Agardh 1827
SYNONYM(S): Amphora coffeaeformis  (Agardh) Kützing 1844 

Gomphosphenia lingulatiformis

 

Halamphora montana
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LM scalebar = 10 µm = 80 pixels.

Observations

Contributor: Joshua Stepanek - February 2011
Length Range: 15-40 µm
Width Range: 5-7 µm
Striae in 10 µm: 17-21 in the center, becoming 22-24 near the poles

Description

Valves are semi-lanceolate to semi-elliptical and strongly dorsiventral. The dorsal margin is smoothly to flatly arched. The ventral margin is straight to slightly concave. The valve ends are protracted, narrowly rostrate to subcapitate, and slightly ventrally deflected. The raphe is positioned close to the ventral margin. The raphe is straight or may have a gradual dorsal bend near the central valve. The proximal raphe ends are weakly inflated with a slight dorsal deflection. The dorsal axial area is narrow narrow, while the ventral side is wider. A dorsal fascia is absent, a ventral fascia is present but difficult to resolve in the light microscope due to the indistinct ventral striae. The dorsal striae are uninterrupted, slightly radiate, becoming more radiate at the poles. The ventral striae are often difficult to resolve and are radiate near the center, and convergent at the poles.

Original Description

Basionym: Frustulia coffeaeformis
Author: Agardh 1827
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Stepanek, J. (2011). Halamphora coffeaeformis. In Diatoms of the United States. Retrieved May 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/halamphora_coffeaeformis

Species: Halamphora coffeaeformis

Contributor: Joshua Stepanek

Reviewer: Rex Lowe

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Image Credit: Josh Stepanek

  1. Valves strongly dorsiventral
  2. Dorsal striae continuous
  3. Striae 17-21 in center
  4. Valve ends protracted, narrowly rostrate to subcapitate

Valves are strongly dorsiventral. The raphe is positioned near the ventral margin. Proximal raphe ends weakly inflated with slight deflection dorsally. A dorsal fascia is absent, and the dorsal striae are uninterrupted. Valve ends are protracted, narrowly rostrate to subcapitate.

Compare

Halamphora coffeaeformis is distinguished from H. acutiuscula and H. tumida by its higher striae density.

Halamphora acutiuscula

(Kutzing) Levkov

Halamphora tumida

(Hustedt) Levkov

Citations

Agardh, C.A. (1827). Aufzählung einiger in den ostereichischen Ländern gefundenen neuen Gattungen und Arten von Algen nebst ihrer Diagnostik und beigefugten Bemerkungen. Flora oder Botanische Zeitung, Regensburg 2:625-640.

Archibald, R.E.M. and Shoeman, F.R. (1984). Amphora coffeaeformis (Agardh) Kutzing: a revision of the species under light and electron microscopy. S. Afr. J. Bot. 3: 83-102.

Levkov, Z. (2009). Amphora sensu lato. In Diatoms of Europe, Volume 5. (H. Lange-Bertalot, ed). A.R.G. Gantner Verlag K.G. 916pp.

Patrick, R.M. and Reimer, C.W. (1975). The Diatoms of the United States, exclusive of Alaska and Hawaii, V. 2. Monographs of the Academy of Natural Sciences of Philadelphia 13.

Links & ID's

Index Nominum Algarum (INA)

INA

California Academy of Sciences (CAS)

Halamphora coffeaeformis CAS

North American Diatom Ecological Database (NADED)

NADED ID: 7009

Autecology Discussion

Habits

Size Range

1001-10,000 µm3 (ie Diatoma vulgaris)

Motility

slightly motile (e.g. Cocconeis)
moderately motile (e.g. Navicula tripunctata)

Attachment

prostrate (e.g. mucilage pad)

Habitat

benthic

Colony

solitary

EMAP Assessment

Sampling for the Environmental Protection Agency (EPA) western Environmental Monitoring and Assessment Program (EMAP) study was completed during the years 2000-2004 (see citations at bottom of this page). Streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming). Over 1200 sites on streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming) were selected for sampling based on a stratified randomized design. This type of design insures that ecological resources are sampled in proportion to their actual geographical presence. Stratified randomized design also allows for estimates of stream length with a known confidence in several “condition classes” (good or least-disturbed, intermediately-disturbed, and poor or most-disturbed) for biotic condition, chemistry and habitat.

EMAP Distribution

Halamphora coffeaeformis

Distribution

The distribution map represents the relative abundance of this Halamphora coffeaeformis in the western EMAP study. Relative abundance is a measure of the proportion of cells of this species based on a "fixed count" of 300 total diatom cells counted and identified. Each of the western EMAP sample sites is shown, either with a black dot for sites where Halamphora coffeaeformis was not recorded, or with a red circle indicating the relative abundance of Halamphora coffeaeformis.

Note that the size of the proportional symbols varies between species to help show both abundant and rare species.

Scale for the map to the left

EMAP Response Plots

Halamphora coffeaeformis

Responses

The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Halamphora coffeaeformis 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.

EMAP citations

Results are published in:

Johnson, T., Hermann, K., Spaulding, S., Beyea, B., Theel, C., Sada, R., Bollman, W., Bowman, J., Larsen, A., Vining, K., Ostermiller, J., Petersen, D. Hargett, E. and Zumberge, J. (2009). An ecological assessment of USEPA Region 8 streams and rivers. U.S. Environmental Protection Agency Region 8 Report, 178 p.

Stoddard, J. L., Peck, D. V., Olsen, A. R., Larsen, D. P., Van Sickle, J., Hawkins, C. P., Hughes, R. M., Whittier, T. R., Lomnicky, G. A., Herlihy, A. T., Kaufman, P. R., Peterson, S. A., Ringold, P. L., Paulsen, S. G., and Blair, R. (2005). Environmental Monitoring and Assessment Program (EMAP) western streams and rivers statistical summary. U.S. Environmental Protection Agency Report 620/R-05/006, 1,762 p.

Stoddard, J. L., Peck, D. V., Paulsen, S. G., Van Sickle, J., Hawkins, C. P., Herlihy, A. T., Hughes, R. M., Kaufman, P. R., Larsen, D. P., Lomnicky, G. A., Olsen, A. R., Peterson, S. A., Ringold, P. L., and Whittier, T. R. (2005). An ecological assessment of western streams and rivers. U.S. Environmental Protection Agency Report 620/R-05/005, 49 p.