Diprora haenaensis

Main 2003      Category: Araphid

Diploneis ovalis


Discostella pseudostelligera

LM scalebar = 10 µm = 80 pixels.


Contributor: Steve Main - June 2011
Length Range: 2-45 µm
Width Range: 2-8 µm
Striae in 10 µm: 6 (pores)


Valves are linear with broad, rounded ends. The smallest valves are nearly circular. The sternum is broad and a single row of simple marginal pores is present. The pores are rimmed channels. In girdle view, frustules are rectangular. Frustules are joined together, forming filamentous chains. The valve face surfaces within a filament are alternately convex and concave and fit together convex surface to concave surface. Convex valves have pores that extend through the valve wall in a pervalvar direction. Concave valve pores extend in a transapical direction. The channels formed by these pores in the thick cell walls are notable in light microscopy and their orientation varies depending on a concave or convex valve surface. In girdle view, the mantle is extended at the apices to form prows. Within a frustule, the prows of the epivalve overlap the prows of the hypovalve (SEM). Cingula are incomplete and consist of segments that extend on one side of each valve between the prows. Only the epicingulum is visible in intact frustules. In prepared slides, many epicingula are lost. Post-auxospore valves are expanded centrally. Some valves have thick walls and broadened outlines; these valves are presumed to be resting cells.

Original Description

Author: Main 2003
Length Range: 2-45 µm
Width Range: 2-8 µm
Striae in 10 µm: 6

Original Description

Frustules in girdle view rectangular, forming chains. Valves linear with round ends, 2-45 µm long, 2-8 µm wide, smallest valves nearly circular. Valves with a prow at each end; prows of epivalve overlap prows and mantle of hypovalve. Sternum broad with a single row of simple pores present near valve to mantle transition, 6 in 10 µm. The pores of concave valves extend through the wall in a transapical direction, while those of convex valves extend more or less in a pervalvar direction. Concave valve of one frustule adherent to a convex valve of adjacent frustule in the filament. Cingula composed of two nearly straight band segments and the prows at each end of the valve that separate them. Band segments with small flaps that form pars interior along advalvar edge. Hypocingulum band elements “hidden” under epicingulum of intact frustule.

Original Images

Cite This Page:
Main, S. (2011). Diprora haenaensis. In Diatoms of the United States. Retrieved April 20, 2018, from http://westerndiatoms.colorado.edu/taxa/species/diprora_haenaensis1

Species: Diprora haenaensis

Contributor: Steve Main

Reviewer: Sarah Spaulding


Main, S.P. (2003). Diprora haenaensis gen. et sp. nov., a filamentous, pseudoaerial, araphid diatom from Kaua’i (Hawaiian Islands). Diatom Research 18: 259-272. 10.1080/0269249X.2003.9705591

Witkowski, A., Lange-Bertalot, H. and Metzeltin, D. (2000). Diatom Flora of Marine Coasts I. Iconographia Diatomologica 7: 1-925.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Diprora haenaensis CAS

NCBI Genbank Taxonomy

Diprora haenaensis NCBI

North American Diatom Ecological Database (NADED)


Autecology Discussion

Known only from the type location (Haena Wet Cave on the N shore of Kaua’i beside the road to Kee Beach). Reported from wet walls of other nearshore caves in Hawai’I (Rex Lowe).