FIGURE 10. Lithothamnion sp. G. Specimen LAF6548. A. Longitudinal section through protuberance showing multiple overgrown conceptacles (arrows) and location of secondary hypothallium (star). Scale bar 250 μm. Inset: Thallus habit with unbranched protuberances. Scale bar 5 mm. B. Magnified view of location indicated by the star in Fig. 10A showing secondary hypothallium (arrow) growing over the conceptacle roof. Scale bar 43 μm. C. Perithallium showing multiple fusions (F). Scale bar 30 μm. D. Section and surface view showing epithallial cells (arrows) with polygonal outline and trapezoidal shaped lumen. Circle arrow indicates epithallial cell with intact roof. Scale bar 13 μm.

Published as part of Richards, Joseph L., Vieira-Pinto, Talita, Schmidt, William E., Sauvage, Thomas, Gabrielson, Paul W., Oliveira, Mariana C. & Fredericq, Suzanne, 2016, Molecular and Morphological Diversity of Lithothamnion spp. (Hapalidiales, Rhodophyta) from Deepwater Rhodolith Beds in the Northwestern Gulf of Mexico, pp. 81-114 in Phytotaxa 278 (2) on page 101, DOI: 10.11646/phytotaxa.278.2.1, http://zenodo.org/record/13645891