Hyphomorpha Borzì, 1916

Holotype species: Hyphomorpha antillarum Borzì

Original publication and holotype designation: Borzì, A. (1916). Studi sulle Mixoficee. II. Stigonemaceae. Nuovo Giornale Botanico Italiano, series 2 23: 559-588.

Description: Filamentous-thallose; thallus composed of creeping and/or erect filaments with common, irregular and repeated true, pseudodichotomous branchings, more or less polarized. Trichomes and branches of the same morphology,.moniliform, torulous, uniseriate and later multiseriate (to widths of 5 cells), in old basal parts sometimes forming chroococcoid clusters of cells; branchings of V- and T- type (latter in young, creeping trichomes). Sheaths thin, homogeneous, colorless to thick, clearly stratified and colored (yellow-brown), enveloping the whole branched trichome. Cells subspherical, polygonal-rounded or barrel-shaped (in uniseriate trichomes), blue-green or violet, finely granulated. Heterocytes solitary, intercalary, usually flattened, shorter than wide. Akinetes not known.All cells capable of division in different planes, in filaments usually mainly perpendicular to the trichome-axis. Terminal cells of branches divide often repeatedly in nanocytes. Reproduction by nanocytes which liberate from the opened sheaths at the ends of filaments and branches, by solitary liberated cells (sometimes with own envelopes) and by fragments of filaments (rarely by hormogonia). Two species aerophytic and epiphytic, growing on bark and leaves of trees and on epiphytic mosses in tropical forests (Madagaskar, Antilles); one species grows on submerged wood in stagnant waters (Africa-Gabon).

Information contributed by: J. Komárek. The most recent alteration to this page was made on 2023-03-06 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: Strunecký, O., Ivanova, A.P. & Mares, J. (2022 '2023'). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): 12-51.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=45665

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024