116
Views
3
CrossRef citations to date
0
Altmetric
Research Article

Four new Orthoseira Thwaites species from Maui, Hawaii, and the Columbia River Gorge, Oregon, with comments on frustular morphology in the genus

ORCID Icon & ORCID Icon
Pages 17-37 | Received 02 Aug 2021, Accepted 23 Nov 2021, Published online: 27 Apr 2022
 

Abstract

Light, scanning electron and focused ion beam microscope observations are presented for four new species of the diatom genus Orthoseira Thwaites. Three species, O. mauiana sp. nov., O. loweana sp. nov. and O. hawaiiensis are described from Maui (Hawaiian Islands), and one species, O. oregoniana sp. nov., is described from Oregon, USA. These four species all possess carinoportulae, the feature that diagnoses the genus, but differ in many other characters, including presence and types of spines, caverns, and pore fields. We compare and contrast these species with each other, and other species currently assigned to the genus. We also compare the different morphologies with other genera proposed, but not currently recognized, such as Liparogyra Ehrenberg, Stephanosira Ehrenberg, and Porocyclia Ehrenberg, and consider the systematic relationships of these groups within Orthoseira.

Acknowledgements

The authors are grateful to Dr Tomoko Borsa, Facility Manager, of the COSINC-CHR for her help with SEM and FIB observations. This work was supported in part by the Colorado Shared Instrumentation in Nanofabrication and Characterization (COSINC) spring 2020 proposal awards programme. The authors are grateful for the two anonymous reviews which improved the manuscript.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access

  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 61.00 Add to cart

Issue Purchase

  • 30 days online access to complete issue
  • Article PDFs can be downloaded
  • Article PDFs can be printed
USD 160.00 Add to cart

* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.