Karayevia ploenensis var. gessneri

(Hustedt) Bukhtiyarova 1999      Category: Monoraphid
BASIONYM: Achnanthes gessneri Hustedt 1953
SYNONYM(S): Achnanthes ploenensis var. gessneri (Hustedt) Lange-Bertalot in Lange-Bertalot & Krammer 

Karayevia oblongella

 

Karayevia suchlandtii

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Marina Potapova - May 2010
Length Range: 11-16 µm
Width Range: 4.8-5.6 µm
Striae in 10 µm: 14-16 in the center of raphe valve, 15-17 in the center of raphe valve, up to 20 at the ends

Description

Valves are elliptical-lanceolate with subrostrate to rostrate apices. Both raphe and rapheless valves have a narrow lanceolate axial area and lack a distinct central area. The raphe is straight. Striae on the raphe valve are strongly radiate, becoming parallel to slightly convergent toward the apices. The striae on the rapheless valve are slightly radiate, becoming parallel to slightly convergent toward the apices. The striae on the rapheless valve are interrupted by a marginal longitudinal line on each side of the valve.



Original Description

Basionym: Achnanthes gessneri
Author: Hustedt 1953
Length Range: 14-17 µm
Width Range: 5-6 µm
Striae in 10 µm: 16 in the center of raphe valve

Original Description

Valvae elliptico-lanceolatae apicibus obtuse rostratis, 14-17 µ latae. Rhaphovalva rhaphe directa poris centralibus approximatis, area axiali anguste lanceolata, striis transapicalibus radiantibus in media parte circiter 16 in 10 µ, ad apices versus paulo densioribus, usque ad 20 in 10 µ. Areovalva area axiali anguste lanceolata, striis transapicalibus in media parte lenissime radiantibus vel ad lineam mediam perpendicularibus, 16-20 in 10 µ, ad apices versus magis radiantibus et paulo densioribus, prope marginem costa longitudinali decussatis. Fig. 14-19.

Original Images


Cite This Page:
Potapova, M. (2010). Karayevia ploenensis. In Diatoms of the United States. Retrieved November 28, 2014, from http://westerndiatoms.colorado.edu/taxa/species/karayevia_ploenensis

Species: Karayevia ploenensis

Contributor: Marina Potapova

Reviewer: Rex Lowe

Citations

Bukhtiyarova, L. (1999). Diatoms of Ukraine inland waters. National Academy of Sciences of Ukraine, M.G. Kholodny Institute of Botany, Kyiv, Ukraine. 133 pp.

Hustedt, F. (1953). Diatomeen aus der Oase Gafsa in Südtunesien, ein Beitrag zur Kenntnis der Vegetation afrikanischer Oasen. Archiv für Hydrobiologie 48: 145-153.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Karayevia ploenensis var. gessneri CAS

North American Diatom Ecological Database (NADED)

NADED ID: 125008

Autecology Discussion