Cosmioneis hawai'iensis

Lowe and Sherwood 2010      Category: Symmetrical biraphid
BASIONYM: Cosmioneis hawai'iensis Lowe and Sherwood 2010

Cosmioneis citriformis

 

Cosmioneis reimeri

LM scalebar = 10 µm = 40 pixels.



Observations

Contributor: Rex Lowe - December 2011
Length Range: 30-42 µm
Width Range: 12-15 µm
Striae in 10 µm: 17 in the center, 22 at the ends

Description

Valves are distinctly capitate with broadly rounded margins. The axial area is narrow, expanding to rounded central area. Proximal raphe ends are slightly expanded on external surface of the valve. Distal raphe ends are curved in the same direction. Striae are punctate, radiate and curve from the margin toward the center of the valve. Striae number 17 in 10 μm in the center, becoming finer at the ends (22 in 10 μm). Areolae number 16 in 10 μm and are round toward valve ends and transversely elongate near the center valve.



Original Description

Basionym: Cosmioneis hawai'iensis
Author: Lowe and Sherwood 2010
Length Range: 30-42 µm
Width Range: 12-15 µm
Striae in 10 µm: 17 in the center, 22 at the ends

Original Description

Valves are distinctly capitate with broadly rounded margins (Figs. 19-24). Valves 30-42 μm long, 12-15 μm wide. Axial area narrow expanding to rounded central area. Proximal raphe ends slightly expanded on the valve surface in pyriform depression (Fig. 17), Distal raphe ends are curved in the same direction (Fig. 23). Internally, raphe ends are anchor-shaped (Fig. 24). Striae punctate, and radiate, curving from the margin toward the center of the valve. Striae 17 in 10 μm in the center becoming finer at the ends (22/10 μm). Puncta 16/10 μm round toward valve ends, transversely elongated near center.

Original Images


Cite This Page:
Lowe, R. (2011). Cosmioneis hawai'iensis. In Diatoms of the United States. Retrieved April 25, 2014, from http://westerndiatoms.colorado.edu/taxa/species/cosmioneis_hawaiiensis

Species: Cosmioneis hawai'iensis

Contributor: Rex Lowe

Reviewer: Sarah Spaulding

Citations

Lowe, R.L. and Sherwood, A.R. (2010). Three new species of Cosmioneis (Bacillariophyceae) from Hawai’i. Proceedings of the Academy of Natural Sciences of Philadelphia 160(1):21-28. 10.1635/053.160.0104

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

Cosmioneis hawaiiensis CAS

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion

Populations of C. hawai’iensis are primarily from subaerial habitats Hawai’i.