Grallatoria M.A.Howe, 1920

Holotype species: Grallatoria reptans M.Howe

Original publication and holotype designation: Howe, M.A. (1920). Algae. In: The Bahama flora. (Britton, N.L. & Millspaugh, C.F. Eds), pp. 553-618. New York: published by the authors.

Request PDF

Description: Thallus filamentous, with prostrate and erect axes, ecorticate. Prostrate axial cells with 2 or 3 determinate or indeterminate lateral branches, attached to the substratum by straight multicellular haptera arising from basal cells of determinate laterals. Indeterminate laterals erect, arising on every second cell of prostrate axes, alternately branched with 1 branchlet per cell. Determinate laterals simple, erect, arising in opposite pairs on each axial cell. Spermatangia in pedicellate heads on lower cells of indeterminate branches. Carpogonial branches arising near apices of fertile axes that originate from basal cells of regular indeterminate laterals, the fertile axes oppositely branched below with periaxial cells smaller than remaining cells. Carpogonial branches 4-celled, curved, borne on periaxial supporting cell (the basal cell of a determinate branch) near the apex of fertile filament. Following presumed fertilisation 1 (possibly 2) auxiliary cell arises from the supporting cell. Carposporophytes terminating fertile branches, with numerous involucral filaments. Gonimoblast with a central placenta and terminal lachrymiform carposporangia. Tetrasporangia pedicellate, in axils, tetrahedrally divided.

Information contributed by: Huisman (2018). The most recent alteration to this page was made on 2018-10-10 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=42505

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 October 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 November 2024