Two new Geissleria species are described from Portugal based on their morphological and ultrastructural characteristics. Geissleria tagensis Novais et Ector sp. nov. has rhombic-elliptical valves with broadly rounded to slightly protracted apices and lacks an isolated pore. Geissleria lusitanica Novais et Ector sp. nov. has linear-elliptical to elliptical valves with slightly to markedly protracted ends and two isolated pores. The type analysis of similar species (Geissleria acceptata (Hustedt) Lange-Bertalot et Metzeltin, G. schoenfeldii (Hustedt) Lange-Bertalot et Metzeltin and Navicula modica Hustedt) allowed their better characterization and illustration, supporting the delimitation of the new Portuguese species. A new taxon present in the type material of G. schoenfeldii, G. hinziae Novais et Ector is also described. Three new combinations are also proposed: Geissleria capitata (H. Kobayasi in Kobayasi et Ando) Ector et Novais comb, nov., G. modica (Hustedt) C.E. Wetzel, Novais et Ector comb. nov. and G. taishanica (Y.Q. Guo et S.Q. Xie) Ector et Novais comb. nov. A checklist of the species and a thorough survey of the literature available on Geissleria are provided.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 34 • No. 2