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Issue: Vol. 693 No. 3: 14 Mar. 2025
Type: Article
Published: 2025-03-14
DOI: 10.11646/phytotaxa.693.3.5
Page range: 245-254
Abstract views: 248
PDF downloaded: 7

Acetabularia monodisca, comb. et stat. nov. (Polyphysaceae): A taxonomic reclassification of an umbrella alga from Jaffna, Sri Lanka, with a key to Acetabularia species in the Indian Subcontinent

Wildlife Conservation Society – Galle, Hiyare Reservoir, Hiyare, Galle, Sri Lanka. Sri Lanka Foreign Service, Ministry of Foreign Affairs, Foreign Employment & Tourism, Sri Lanka.
Wildlife Conservation Society – Galle, Hiyare Reservoir, Hiyare, Galle, Sri Lanka. Sri Lanka Administrative Service, Ministry of Defence, Sri Lanka.
Biodiversity Dry zone of Sri Lanka New combination Taxonomy Algae

Abstract

A morphometric analysis of Acetabularia crenulata var. monodisca specimens collected from the Jaffna Sea, Sri Lanka, was conducted. Principal Component Analysis (PCA) and descriptive statistics revealed significant morphological divergence between var. monodisca and A. crenulata populations from the Caribbean Sea (the type locality of A. crenulata). These findings support the reclassification of var. monodisca to the species level as A. monodisca. Specifically, A. monodisca is characterized by a single, less caliciform (cup-shaped) disc (whorl) comprised of 53–86 laterally fused gametangial rays, whereas A. crenulata possess a deeply caliciform disc formed by 41–67 gametangial rays.

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How to Cite

Deshaprema, S. & Dissanayake, S. (2025) Acetabularia monodisca, comb. et stat. nov. (Polyphysaceae): A taxonomic reclassification of an umbrella alga from Jaffna, Sri Lanka, with a key to Acetabularia species in the Indian Subcontinent. Phytotaxa 693: 245–254. https://doi.org/10.11646/phytotaxa.693.3.5