Bryopsis pennata Lamouroux var. secunda (Harvey) Collins and Hervey, 1917: 62

Coppejans, Eric, Leliaert, Frederik, Verbruggen, Heroen, de Clerck, Olivier, Schils, Tom, de Vriese, Thomas & Marie, Daniel, 2004, The marine green and brown algae of Rodrigues (Mauritius, Indian Ocean), Journal of Natural History 38 (23), pp. 2959-3020 : 2977

* Bryopsis pennata Lamouroux var. secunda (Harvey) Collins and Hervey, 1917: 62

( figure 5 ) References: Jaasund, 1976: 17, figure 36; Coppejans and Van den heede, 1996: 56,

figures 11 , 14 ; Littler and Littler, 2000: 342, figure p. 343; Payri et al., 2000: 82,

figure p. 83; Littler and Littler, 2003: 208, bottom figure p. 209.

Syntype localities. Key West and Sand Key, Florida, USA .

Voucher. HEC 14796, 25 September 2001, Grand Baie (s.s. 11) .

Ecology. Epilithic at 25 m.

Distribution. Diego Garcia Atoll, India, Mauritius, Réunion, Rodrigues (this paper), Singapore, Tanzania, Yemen.

Note. Notwithstanding the above-mentioned criticism, this collection was identified to the varietal level because it is completely composed of specimens

with branchlets on two rows, incurved to one side of the rachis.

General remarks on the distribution of Bryopsis in the Mascarene Islands

Except for B. pennata var. secunda , the same Bryopsis taxa have been found on Rodrigues and Mauritius.

Figures

FIGS 2–6. Chlorophyta. (2) Microdictyon tenuius, detail of branching and anastomosing patterns (HEC 14849). (3) Bryopsis pennata var. pennata, branchlets of last order contiguous and in a single plane (HEC 14796 p.p.). (4) Bryopsis pennata var. leprieurii, branchlets of last order interrupted and in a single plane (HEC 14757).(5) Bryopsis pennata var. secunda, branchlets of last order curved in one direction (HEC 14796 p.p.). (6) Chamaedoris delphinii (HEC 14617). Scale bars: 250 mm (2); 5 mm (3–5); 1 cm (6).

FIGS 7–13. Caulerpa brachypus, variation in the general morphology and margin structure of the assimilators. (7) Large growth form collected in grooves between bumps of coral rubble, frequently branching and with secondary stolons (HEC 14867). (8) Intermediately large growth form with wide assimilators (HEC 14769). (9) Intermediately large growth form with relatively narrow assimilators (HEC 14656a). (10) Typical specimen with simple or scarcely branched assimilators (HEC 14612). (11) Assimilator with smooth margin (HEC 14612). (12) Assimilator with coarsely dentate margin (HEC 14656a). (13) Assimilator with densely dentate margin (HEC 14718). Scale bars: 2 cm (7–10); 1 mm (11–13).

FIGS 14–18. Caulerpa. (14) Caulerpa cupressoides var. lycopodium f. elegans, small, elegant specimen (HEC 14691). (15) Caulerpa cupressoides var. lycopodium f. elegans, coarse specimen with richly branched assimilators (HEC 14820). (16) Caulerpa sertularioides f. sertularioides, last order branchlets in a single plane (HEC 14739). (17) Caulerpa sertularioides f. farlowii, last order branchlets in several planes (HEC 14690). (18) Caulerpa webbiana (HEC 14699). Scale bars: 1 cm.