Fragilaria aequalis Heiberg 1863
Publication Details
Fragilaria aequalis Heiberg 1863: 61, pl. 4: fig. 12
Published in: Heiberg, P.A.C. (1863). Conspectus criticus diatomacearum danicarum. Kritisk oversigt over de danske Diatomeer. pp. 1-135, 6 pls. Kjøbenhavn: Wilhelm Priors Forlag.
Request PDFType Species
The type species (lectotype) of the genus Fragilaria is Fragilaria pectinalis (O.F.Müller) Lyngbye.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Type locality: Coenhagen, leg. Heiberg [epitype]; (Van de Vijver & al. 2021: 3) Notes: Epitype: designated by Van de Vijver & al. (2021: 3) for the lectotype of Fragilaria aequalis Heiberg: Plate 4: fig. 12 in Heiberg (1863): slide IX-20- C8 (BR, Meise Botanic Garden), designated by Van de Vijver & al. (2021: 3).
General Environment
This is a freshwater species.
Description
Frustules in girdle view rectangular, joined to form very long, ribbon-like colonies, often composed of several tens of cells. Valves strictly linear with parallel margins and a slight constriction in the middle. Valve apices broadly rounded, often weakly protracted, rostrate. Valves dimensions (n=50): length 28–55 ?m, width 4.0–4.5 ?m. Axial area very narrow but present, linear throughout. Central area constricted, forming a vague hyaline zone, bordered by very shortened striae. Striae parallel throughout the entire valve length, 15–17 in 10 ?m. Areolae not discernible in LM.
Created: 23 April 2002 by M.D. Guiry.
Last updated: 16 March 2021
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=38103
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 16 March 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 24 April 2024
