given near nodes (or right from taxon labels in case of insufficient space near the node, indicated with *). A dash (-) indicates that the branch does not occur in.
Trentepohlia aurea Oltmannsiellopsis viridis Ulva intestinalis Pseudendoclonium akinetum 100/1 Ulothrix zonata 100/1 Chlorocladus australasicus Batophora oerstedii 100/1 Batophora occidentalis Neomeris dumentosa 100/1 100/1 52/0.88 Cymopolia spp Bornetella nitida 100/1 Bornetella sp. 99/1 Halicoryne wrightii 100/1 Chalmasia antillana Parvocaulis exigua 81/1 100/0.99 Parvocaulis parvula 96/1 Acetabularia calyculus Acetabularia acetabulum 67/0.95 Acetabularia dentata 55/51/1 Acetabularia schenkii 96/Aceatabularia crenulata 56/0.85 100/0.76 Acetabularia peniculus Ostreobium sp. 56/Pedobesia spp 81/Bryopsidella neglecta Derbesia marina 50/0.99 98/1 Derbesia tenuissima Bryopsis hypnoides 100/1 100/1 Bryopsis plumosa 86/Codium lineage 1 Codium lineage 2 100/1 71/0.99 Codium lineage 3 Dichotomosiphon tuberosus Avrainvillea nigricans 100/1 76/0.99 78/0.96 Avrainvillea lacerata Rhipilia crassa 100/1 Supplementary Fig. S3. Rhipiliopsis profunda 84/Rhipilia nigrescens Five markers Maximum 100/1 Rhipilia tomentosa 72/0.98 Likelihood (ML) tree of 105 Halimeda discoidea Halimeda micronesica 100/1 Dasycladales and Bryopsidales Halimeda incrassata 78/1 Halimeda gracilis 100/1 33/0.59 and five Ulvophyceae (outgroup). 81/0.99 Halimeda opuntia 30/Pseudocodium floridanum Branch support values (ML bootstrap percentage / 100/1 Pseudocodium natalense Bayesian Inference [BI] posterior probability) are Tydemania expeditionis 38/0.94 Flabellia petiolata given near nodes (or right from taxon labels in case 42/0.96 Udotea flabellum 81/0.98 of insufficient space near the node, indicated with *). 86/0.99 Rhipidosiphon javensis 100/0.98 Chlorodesmis fastigiata A dash (-) indicates that the branch does not occur in Udotea glaucescens 98/0.98 the BI tree. Names of taxonomic groups are given at 100/1 Penicillus dumetosus 43/0.56 Udotea spinulosa 56/0.98 the right. 32/Penicillus capitatus 98/1 Rhipocephalus phoenix Calibration points A-F for the chronogram in Figure 2 71/0.98 Pseudochlorodesmis sp.1 are indicated in a summarized tree in the Pseudochlorodesmis sp.2 100/0.98 Pseudochlorodesmis sp.3 lower left corner. 90/0.97 Pseudochlorodesmis sp.4 C. = Caulerpa. C. filicoides C. filicoides var. andamanensis 100/1 C. verticillata 1 50/100/1 C. verticillata 2 59/0.61 C. cliftonii 51/1 C. hedleyi 53/outgroups 90/1100/1 Pseudochlorodesmis sp.5 62/0.95 100/1 65/0.94 Caulerpella ambigua 1 100/1 99/1 Caulerpella ambigua 2 86/1 Caulerpella ambigua 3 93/1 C. obscura Dasycladales 100/1 C. elongata 99/1 selaginoides * C. brownii* var. 80/0.64 C. trifaria 88/0.99 Ostreobium 100/1 99/1 C. brownii Bryopsidineae 46/0.75 C. flexilis 2 51/1 Dichotomosiphonaceae 100/1 78/1 C. flexilis 1 98/1 100/1 C. papillosa 94/1 C. vesiculifera C. fergusonii *45/0.42 * 78/0.96 * C. bartoniae *49/0.35 C. lucasii 97/1 C. opposita 100/1 * 43/ * C. lentillifera*97/1 *99/1 100/1 0.81 C. okamurae 81/ C. simpliciuscula *94/1 * Halimedineae 0.98 C. sedoides f. geminata 68/ C. cactoides 0.99 * C. corynephora *95/1 85/1 C. agardhii C. lanuginosa 100/1 C. paspaloides * C. longifolia 1 *98/1 96/1 * *100/1 C. longifolia 2 C. scalpelliformis core Halimedineae * *100/1 55/0.61 C. remotifolia C. sertularioides f. longipes 95/1 * C. prolifera *60/0.98 * C. taxifolia var. distichophylla *59/0.98 *C. taxifolia *100/1 44/0.79 C. cupressoides var. urvilleana * C. manorensis *81/0.98 57/0.95 C. scalpelliformis var. denticulata C. fastigiata 31/0.64 27/0.82 C. brachypus 35/0.63 C. filiformis 24/- C. serrulata 0.2 22/0.47 C. cupressoides 33/- C. webbiana f. tomentella 0.2 subsitutions/site 99/1 C. webbiana f. disticha 51/1
