• Category
  • Length Range
    15-44 µm
  • Width Range
    12-28 µm
  • Striae in 10 µm
    26-30

Identification

Description

Valves are ellipitic in outline and strongly arched about the apical axis. The raphe valve has a narrow, linear axial area with a filiform raphe. The proximal raphe ends are dilated slightly. The distal ends are straight and terminate subterminally. There is a small, irregular central area. A hyaline area occurs on either side of the axial area and forms a naviculoid shape. Striae are fine, punctate, and radiate. The rapheless valve has a narrowly lanceolate central sternum. The areolae are dash-like and offset from one another.

Autecology

Original Description

Cocconeis klamathensis sp. nov. Pl. II, Figs. 16, 17. Valvae ellipticae, valde convexae, 15-30 μ longae, 13-25 μ latae. Rhaphovalva cum elevatione longitudinali late lanceolate, rhaphe directa, filiformis, poris centralibus approximatis, fissuria terminalibus minimis ab apicibus distantibus, area axialis angustissima, area centralis transapicaliter dilatata, fasciam angustiam et marginem non attigentem formans. Striae transapicales radiantes, 24-29 in 10 μ, distincte punctatae, circiter in medio area hyalina longitudinali curvata decussatae. Areovalva area axali angustissima, area centrali minima, striae transapicales paulo vali- dores, distincte punctatae, series punctorum longitudinales irregulariter undulatae, paulo remotiores quam striae transapicales.

  • Author
    Sovereign 1958
  • Length Range
    15-30 µm
  • Width
    13-25 µm
  • Striae in 10µm
    24-29

Original Images

Cocconeis klamathensis orig illus
Cocconeis klamathensis orig descr

Cite This Page

Kociolek, P. (2011). Cocconeis klamathensis. In Diatoms of North America. Retrieved February 19, 2025, from https://diatoms.org/species/45658/cocconeis_klamathensis