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Humidophila pantropica

(Lange-Bert.) Lowe et al. 2014      Category: Symmetrical biraphid
BASIONYM: Diadesmis pantropica Lange-Bert. 2000

Humidophila contenta


Humidophila schmassmanni

LM scalebar = 10 µm = 80 pixels.


Contributor: Rex Lowe - December 2011
Length Range: 16-21 µm
Width Range: 2.9-3.3 µm
Striae in 10 µm: 26-28


The valves are linear, slightly swollen in the center and at the ends. The axial area is straight and linear; the central area is round. The raphe terminates in a subapical nodule.

Original Description

Basionym: Diadesmis pantropica
Author: Lange-Bert. 2000
Length Range: 20-35 µm
Width Range: 3-4 µm
Striae in 10 µm: 25-27

Original Description

Species subgeneris Paradiadesmis. Valvae stricte lineares in media parts parum inflatae apicibus late subcapitatis et late rotundatis, 20-35, longae, 3-4 μm latae. Raphe filiformis recta poris et nodulis terminalibus plus minusve valde de apicibus ad partem proximalem versus transferunt, itaque cum areis terminalibus angustis longs prolongatis. Area axialis angusta linearis, area centralis plerumque paene circularis modice ampla. Striae transapicales circum aream centralem radiatae aliis parallelis vel subparallelis, 25-27 in 10 μm.

Original Images

Cite This Page:
Lowe, R. (2011). Humidophila pantropica. In Diatoms of the United States. Retrieved May 24, 2018, from

Species: Humidophila pantropica

Contributor: Rex Lowe

Reviewer: Sarah Spaulding


Lowe, R.L., Kociolek, J.P., Johansen, J.R., Van de Vijver, B., Lange-Bertalot, H. and Kopalová, K . (2014). Humidophila gen. nov., a new genus for a group of diatoms (Bacillariophyta) formerly within the genus Diadesmis: species from Hawai’i, including one new species. Diatom Research 29(4): 351-360. 10.1080/0269249X.2014.889039

Rumrich, U., Lange-Bertalot, H. and Rumrich, M. (2000). Diatoms of the Andes. From Venezuela to Patagonia/Tierra del Fuego and two additional contributions. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 9. Phytogeography-Diversity-Taxonomy. Koeltz Scientific Books, Königstein, Germany, 9:673 pp.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Humidophila pantropica CAS

North American Diatom Ecological Database (NADED)


Autecology Discussion


- Transfer

This taxon original appeared on the Diatoms of US website under the genus Diadesmis. An update was made to reflect a transfer to the new genus, Humidophila. - S. Spaulding