Tepoztequiella rhizoidea Núñez-Resendiz, Dreckmann & Sentíes

Resendiz, María Luisa Núñez, Dreckmann, Kurt M., Sentíes, Abel, Wynne, Michael J. & Tejera, Hilda León, 2019, Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico, Phytotaxa 387 (3), pp. 219-240 : 231

Tepoztequiella rhizoidea Núñez-Resendiz, Dreckmann & Sentíes

Thallus cartilaginous, dark red, 20–30 cm in length, with cylindrical axes in cross section, 360–550 μm in diameter.Main axes branching irregularly to pseudo-dichotomously, branches with smooth surfaces ( Fig. 30 ). Multiaxial organization with a filamentous medulla and a pseudoparenchymatous cortex ( Fig. 31 ). Medullary filaments produced from cells of the inner cortex, 1.3–2.5 μm in diameter, with many simple single-cell rhizoids. Inner cortex with six layers of stellate or rounded cells, 13–16.5 μm and 40-70 x 60-100 μm in diameter, respectively, also with numerous rhizoids. Outer cortex with two layers of cells, small, pigmented, elongated, 5–7 μm x 2.5–4.0 μm in diameter. Tetrasporangia elongated, claviform, zonately divided, 16–25 μm long and 5–11.5 μm in diameter, embedded in the cortical cells, arising basally from an elongated support cell ( Fig. 32 ).

Figures

FIGURES 28–38. 28–29. Meristotheca cylindrica. 28. Medullary filaments and cortical cells. Scale bar = 140 μm.29. Immature cystocarp. Scale bar = 220 μm. 30–32. Tepoztequiella rhizoidea. 30. Habit. Scale bar = 3.5 cm. 31. Medullary filaments and cortical cells. Scale bar = 90 μm. 32. Tetrasporangia basally attached (arrowhead). Scale bar = 30 μm. 33–34. Gracilaria blodgettii. 33. Habit. Scale bar = 2 cm. 34. Medullary and cortical cells. Scale bar = 140 μm. 35–36. Gracilaria caudata. 35. Habit. Scale bar = 4 cm. 36. Medullary and cortical cells and a mature cystocarp. Scale bar = 310 μm. 37–38. Gracilaria cervicornis. 37. Habit. Scale bar = 3 cm. 38. Medullary and cortical cells. Scale bar = 150 μm.