Peronia fibula

(Bréb. ex Kütz.) R.Ross 1956      Category: Eunotioid
BASIONYM: Gomphonema fibula Bréb. ex Kütz. 1849

REPORTED AS: Peronia heribaudii (J. Brun & M. Peragallo ex Heribaud 1893, p. 155, pl. I, fig. 1) 

Oxyneis binalis var. elliptica


Pinnularia acrosphaeria

LM scalebar = 10 µm = 80 pixels.


Contributor: Loren Bahls | Rob Kimmich - October 2017
Length Range: 27-54 µm
Width Range: 3.0-6.0 µm
Striae in 10 µm: 18-22


Frustules are cuneate, in both valve and girdle view. Valves are heteropolar in the headpole and heterovalvar in the raphe system. The headpole shape is variable and may be rounded, subcapitate, rostrate, or truncate-spatulate. The footpole is narrow and rounded. Short spines are present along the valve margin. A narrow sternum runs the length of the valve. The raphe system differs on each valve. One valve has two raphe branches, extending along the sternum from each pole approximately one third of the valve length. The other valve has a rudimentary raphe evident at the poles, or the raphe may be absent. The proximal raphe ends curve slightly to one side.

Striae are parallel, transverse, irregularly spaced, becoming radial or irregular at the poles. Rimoportulae are present, one at the headpole and one at the footpole.

In contrast to populations on the east coast of the US, the Waldo Lake, Oregon, populations shown here have a highly variable shape of the headpole. Over the size range of the populations, headpole shape shows no relation to valve width or to valve length (see size series image in AUTECOLOGY section). The size series supports a single, variable species rather than multiple taxa.

Of the four species of Peronia, only P. fibula has been verified in North America. Patrick & Reimer (1966) erroneously assigned Meridion intermedium to Peronia intermedium, which would have made this the second species of Peronia. However, M. intermedium, a synonym of M. circulare, lacks a raphe system.

Original Description

Basionym: Gomphonema fibula
Author: Bréb. ex Kütz. 1849
Length Range: µm
Striae in 10 µm:

Original Description

See image of original description, below.

Original Images

Cite This Page:
Bahls, L., and Kimmich, R. (2017). Peronia fibula. In Diatoms of the United States. Retrieved April 21, 2018, from

Species: Peronia fibula

Contributor: Loren Bahls | Rob Kimmich

Reviewer: Jana Veselá


Cleve-Euler, A. (1953). Die Diatomeen von Schweden und Finnland. Teil III. Monoraphideae, Biraphideae 1. Authorized Reprint 1968, Bibliotheca Phycologica, Band 5, J. Cramer, Lehre.

Héribaud, J. (1893). Les Diatomées d’Auvergne. Librairie des Sciences Naturelles, Paris. pp. 1-255.

Kützing, F.T. (1849). Species Algarum. Lipsiae. F.A. Brockhaus, 922 pp.

Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.

Ross, R. (1956). Notulae Diatomologicae I-II. Annals and Magazine of Natural History 9 (ser.12): 76-80.

Round, F.E., Crawford, R.M. and Mann, D.G. (1990). The Diatoms. Biology and Morphology of the Genera. Cambridge University Press, Cambridge, 747 pp.

Sytsma, M., Rueter, J., Petersen, R., Koch, R., Wells, S., Miller, R., Johnson, L. and Annear, R. (2004). Waldo Lake Research in 2003. Center for Lakes and Reservoirs, Portland State University, Portland, Oregon, US.

Williams, D.M. and Reid, G. (2008). Type material of Peronia fibula: morphology, systematics and relationships. Proceedings of the Nineteenth International Diatom Symposium 2006 (Y. Likhoshway ed.), Biopress Ltd., Bristol, pp. 141-150.

Links & ID's

Index Nominum Algarum (INA)

Transfer INA
Original INA

California Academy of Sciences (CAS)

Peronia fibula CAS

North American Diatom Ecological Database (NADED)

NADED ID: 51001

Autecology Discussion

The specimens shown here were collected from the margin of Waldo Lake, Oregon, in September 2015 and July 2016. The samples consisted of rock scrapings, clumps of cyanobacterial mat, and leaves of a submerged liverwort (Division Bryophyta, Class Hepaticae). Cells were found on the liverwort but no stalks from the cells were noticed. Several Eunotia species appeared in the sample, including E. bactriana, E. faba, E. gibbosa, E. monodon, E. parallela, and E. serra. Elsewhere in the United States, P. fibula has been found in fresh, shallow water in Delaware, South Carolina, Florida, South Dakota, and Nebraska (Patrick & Reimer 1966). This species has also been found in Europe (Williams & Reid 2008).

Waldo Lake lies in a glaciated basin on the Cascade Crest in Oregon at 1650 m (5413 feet). It occupies 84% of its drainage basin and receives most of its water from snow melt. Sytsma et al. (2004) found this lake to be acidic and very oligotrophic. Field measurements of pH from 1998 through 2003 averaged 5.9. Specific conductance in 2002 and 2003 averaged 2.9 μS/cm. Between 1996 and 2003 the average alkalinity was 2.34 mg CaCO3/L. From 1986 to 1998, total phosphorus averaged 2.9 µg/L. In 2000, dissolved nitrogen was at or slightly above the detection limit of 1 µg/L. Silica averaged 0.24 mg/L from 1996 to 2003.


Boulder Cove, Waldo Lake, Oregon. A habitat of Peronia fibula.

Credit/Source: Rob Kimmich

Composite image in three sections showing range in size and morphology of several Waldo Lake populations. Headpole shape shows no relation to valve length or to valve width. All images are at the same scale. Each scale bar = 10 µm.

Credit/Source: Rob Kimmich

Continuation of size series. Each scale bar = 10 µm.

Credit/Source: Rob Kimmich

Continuation of size series. Each scale bar = 10 µm.

Credit/Source: Rob Kimmich