New branched Porolithon species (Corallinales, Rhodophyta) from the Great Barrier Reef, Coral Sea, and Lord Howe Island

Porolithon is one of the most ecologically important genera of tropical and subtropical crustose (non‐geniculate) coralline algae growing abundantly along the shallow margins of coral reefs and functioning to cement reef frameworks. Thalli of branched, fruticose Porolithon specimens from the Indo‐Pa...

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Bibliographic Details
Published in:Journal of phycology 2023-12, Vol.59 (6), p.1179-1201
Main Authors: Jeong, So Young, Gabrielson, Paul W., Hughey, Jeffery R., Hoey, Andrew S., Cho, Tae Oh, Abdul Wahab, Muhammad A., Diaz‐Pulido, Guillermo
Format: Article
Language:English
Subjects:
Acidification
Algae
Barrier reefs
Coral Reefs
crustose coralline algae
Genera
Hydrogen-Ion Concentration
morpho‐anatomy
New species
non‐geniculate coralline algae
Ocean acidification
Phialidium gardineri
Phylogeny
Physical characteristics
Porolithon
Porolithon castellum
Porolithon craspedium
Porolithon gardineri
Protuberances
psbA
rbcL
RbcL gene
Rhodophyta
Seawater
Sequencing
taxonomy
Thalli
Thallus
type specimen sequencing
Type specimens
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Summary:Porolithon is one of the most ecologically important genera of tropical and subtropical crustose (non‐geniculate) coralline algae growing abundantly along the shallow margins of coral reefs and functioning to cement reef frameworks. Thalli of branched, fruticose Porolithon specimens from the Indo‐Pacific Ocean traditionally have been called P. gardineri, while massive, columnar forms have been called P. craspedium. Sequence comparisons of the rbcL gene both from type specimens of P. gardineri and P. craspedium and from field‐collected specimens demonstrate that neither species is present in east Australia and instead resolve into four unique genetic lineages. Porolithon howensis sp. nov. forms columnar protuberances and loosely attached margins and occurs predominantly at Lord Howe Island; P. lobulatum sp. nov. has fruticose to clavate forms and free margins that are lobed and occurs in the Coral Sea and on the Great Barrier Reef (GBR); P. parvulum sp. nov. has short (
ISSN:0022-3646
1529-8817
DOI:10.1111/jpy.13387