Staurosirella martyi

(Héribaud) Morales and Manoylov 2006      Category: Araphid
BASIONYM: Opephora martyi Héribaud 1902
SYNONYM(S): Martyana martyi (Héribaud) Round 1990 | Fragilaria martyi (Héribaud) Lange-Bertalot 1993 
REPORTED AS: Fragilaria  leptostauron var. martyi  (Krammer and Lange-Bertalot 1991, p. 160 fig. 133:28-31) | Fragilaria  mutabilis f. martyi  ((Heribaud) Cleve-Euler 1932) | Fragilaria  mutabilis var. intercedens  ((Heribaud) Cleve-Euler 1932) 

Staurosirella leptostauron var. dubia

 

Staurosirella pinnata

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Edna Pedraza Garzon - June 2014
Length Range: 6-28 µm
Width Range: 5.5-8 µm
Striae in 10 µm: 5-6

Description

Valve margin variable, from ovoid to elliptic. Valves are coarse, robust, and asymmetric to symmetric to the transapical axes. In other words, valves are typically heteropolar in valve view. A “step” is visible at the headpole of many specimens, but not all. The sternum is usually lanceolate. The striae are coarse and distinctive, and are formed by lineolae. The striae are perpendicular to the apical axis, but become radiate near the ends. A single apical pore field is present at the foot pole. Spines are absent. In girdle view, valves are rectangular and the wide valvocopula is visible. The “step” at the headpole may also be evident.

Due to the absence of spines, S. martyi does not form ribbon-like colonies like some other small fragilarioid taxa. Identification of small specimens is difficult and small valves of S. martyi may be indistinguishable from those of S. ovata and S. pinnata.



Original Description

Basionym: Opephora martyi
Author: Héribaud 1902
Length Range: 17 µm
Width Range: 7 µm
Striae in 10 µm: 6

Original Description

Original Images


Cite This Page:
Pedraza Garzon, E. (2014). Staurosirella martyi. In Diatoms of the United States. Retrieved December 19, 2014, from http://westerndiatoms.colorado.edu/taxa/species/staurosirella_martyi

Species: Staurosirella martyi

Contributor: Edna Pedraza Garzon

Reviewer: Eduardo Morales

Citations

Heribaud, J. (1902). Les Diatomees fossiles D’ Auvergne. Librairie des Sciences Naturelles, Paris, France. 79 p.

Morales, E.A Monoylov, K.M. (2006). Morphological studies on selected taxa in the genus Staurosirella Wiliams et Round (Bacillariophyceae) from rivers in North America . Diatom Research 21(2):343-364.

Witkowski, A. Lange-Bertalot, H. and Metzeltin, D. (1995). The diatom species Fragilaria martyi (Heribaud) Lange-Bertalot, identity and ecology. Archiv für Protistenkunde 146: 281-292.

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

Staurosirella martyi CAS

NCBI Genbank Taxonomy

Staurosirellamartyi (Heribaud-Joseph) Morales & .Manoylov NCBI

North American Diatom Ecological Database (NADED)

NADED ID: 175031

Autecology Discussion

Staurosirella martyi is usually found as solitary cells attached to sand grains. Cells may also form zig-zag colonies by means of mucilage pads. In this study, it was found in plankton and epipsammic samples from West Lake Okoboji (Triboji Beach and Gull Point) in Dickinson County, Iowa. Specimens in the Reimer Herbarium included a moist sand site at Miniwaukan State Park, Spirit Lake, Dickinson County, Iowa.

The highest densities of S. martyi recorded by the USGS BioData program have been from creeks and rivers of Nebraska, Wisconsin and Minnesota although there are also abundant records from California, Idaho and Georgia.

This species has been reported to be tolerant of eutrophic waters (Witkowski et al. 1995). In North America, S. martyi has been found in warm (19 -23 ºC), and basic waters (pH 8.3), with conductivities between 312-348 µS/cm (Morales and Manoylov 2005).

Images

Staurosirella martyi attached to a sand grain

Credit/Source: Image by E. Pedraza Garzón

Zig-Zag colony

Credit/Source: Image by E. Pedraza Garzón