Lobophora lamourouxii Payri & C.W.Vieira, 2020

Kwan, Valerie, Yip, Zhi Ting, Fong, Jenny & Huang, Danwei, 2021, Diversity and phylogeny of the brown alga Lobophora (Dictyotales, Phaeophyceae) in Singapore, Phytotaxa 496 (3), pp. 215-227 : 223-224

Lobophora lamourouxii Payri & C.W.Vieira in Vieira et al. (2020: 597)

Lobophora spWA03 Schultz et al. 2015 and Lobophora sp 64 Vieira et al. 2016

Specimens observed:— LOBO11, LOBO21, LOBO34, LOBO35, LOBO36 (Reef Ecology Laboratory, NUS)

Description:— Thallus exhibiting crustose growth form ( Fig. 4D ). Base of thallus narrow, growing firmly attached to the substrate. Margin entire. Thallus 2 cm wide and 1.5 cm tall, orange to reddish brown. Thallus 165–195 μm thick, composed of a single layer of medulla cells, 2–3 layers of dorsal cortical cells, and 2 layers of ventral cortical cells ( Fig. 4E and 4F ). Medulla cells 45–122 μm wide and 45–122 μm thick. Dorsal and ventral cortical cell layers 49–56 μm and 47–56 μm thick respectively. Sporangial sori attached to surface, 82 μm in diameter and 193 μm in length ( Fig. 4D , inset).

Holotype:— NOU 201665 [ IRD 11176, CP15166]. Saint Vincent. 26 April 2015. Collected by C. Payri.

Type locality:— Wallibou (13.333, 61.221617), Saint Vincent, Windward Islands , Lesser Antilles, West Indies .

Distribution:— Guadeloupe (Shultz et al. 2015), Malaysia ( Vieira et al. 2016), Curacao, Saint Vincent ( Vieira et al. 2020), Singapore (this study).

Habitat:—Intertidal and reef crest (3–4 m depth). Attached to hard substratum growing with mixed turf algal assemblages, and also found strongly adherent on intertidal seawalls.

Figures

FIGURE 4. Morphological observations of Lobophora species found in Singapore. Lobophora challengeriae in situ (A), L. challengeriae longitudinal section (B), L. challengeriae transverse section (C). Lobophora lamourouxii in situ (D) (inset: sori), L. lamourouxii longitudinal section (E), L. lamourouxii transverse section (F). Lobophora pachyventera morphotype 1 in situ (G) (inset: morphotype 2), L. pachyventera longitudinal section (H), L. pachyventera transverse section (I). Lobophora sp61 in situ (J), Lobophora sp61 longitudinal section (K), Lobophora sp61 transverse section (L). The metallic scale is 2.5 cm in width (A, D, G, J). Scale bars represent 0.1 mm.