Halichrysis coalescens (Farlow) R.E.Norris & A.J.K.Millar 1991

Current name: Drouetia coalescens (Farlow) G.De Toni
Palau Islands, West PacificPalau International Coral Reef Center

Publication Details
Halichrysis coalescens (Farlow) R.E.Norris & A.J.K.Millar 1991: 583, 585, 587, figs 7-13

Published in: Norris, R.E. (1991). Some unusual marine red algae (Rhodophyta) from South Africa. Phycologia 30: 582-596, 25 figs,1 table.

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Type Species
The type species (lectotype) of the genus Halichrysis is Halichrysis depressa (J.Agardh) F.Schmitz.

Status of Name
This name is currently regarded as a synonym of Drouetia coalescens (Farlow) G.De Toni.

Source of Synonymy
Saunders, G.W., Lane, C.E., Schneider, C.W. & Kraft, G.T. (2006). Unraveling the Asteromenia peltata species complex with clarification of the genera Halichrysis and Drouetia (Rhodymeniaceae, Rhodophyta). Canadian Journal of Botany 84: 1581-1607, 83 figs, 3 tables.

Basionym
Herpophyllon coalescens Farlow

Type Information
Type locality: Tagus Cove, Albemarle Island (Isla Isabela), Galápagos Islands; (Silva & al. 1996: 365) Holotype: FH; (Filloramo & Saunders 2016: 348, fig. 5a)

Origin of Species Name
Participle (Latin), uniting together by growth (Stearn 1983).

General Environment
This is a marine species.

Created: 21 January 1998 by M.D. Guiry.

Last updated: 12 June 2012

Verification of Data
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Taxonomic note
Using SSU sequence comparisons, as well as reproductive evidence, Saunders et al. (2006) found that South African plants known as Halichrysis coalescens (Norris 1991) did not align with either Halichrysis or Drouetia but rather resolved as a novel lineage within the Rhodymeniaceae. The South African plants identified as H. coalescens in Norris (1991) were based on misidentified specimens from Australia that are presently known as Asteromenia pseudocoalescens (Saunders et al. 2006). - (13 June 2012) - Craig Schneider

Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=2916

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 12 June 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 July 2025