Appendix: Table 1: Strain types and source FH Old No. Seq Name Lineage Group Source LatLong MedR 15 In # In Notes No. F463 PacheeD4 [FTP], Dilabifilum Chlorophyta incertae Gordon River mouth, f/2- 15 P "a" and "b" clones FITSP complex sp. sedis 2 Jul 2011, in barnacle F464 PacheeD3 FTP, Dilabifilum Chlorophyta incertae Gordon River mouth, f/2- 15 P "a" and "b" clones FITSP complex sp. sedis 2 Jul 2011, in barnacle F540 AnaBarnPil FITSP, Dilabifilum Chlorophyta incertae Ship Harbor, Anacortes, f/2- 15 P "bigspore"; looser, more like Botanical Beach cultures D3A5/D3 FITS1P complex sp. sedis March 2011, in barnacles (piling) F468 SandB B6a FTP Phaeophila Chlorophyta Ulvales Sandwich Beach, MA, f/2- 15 P, ST sp. 14May11, in hard clam F674 MBARI FITS1P Ulva sp. Chlorophyta Ulvales Moss Landing, California, f/2- 15 P cf. U. californica. Rhizoids penetrate carbonate? barn B3/C6 11Jan12, in/on barnacle F188 Acro FITSP Ulvella sp. Chlorophyta Ulvales Hale`iwa f/2- 20 T from Ulva HS15 sample xHS15 F189 C2A FITSP, Ulvella sp. Chlorophyta Ulvales Hale`iwa 11Jan.09; coral rock f/2- 20 TCF Not known to be shell-boring FITS1P F190 C3A1 FITSP, Ulvella sp. Chlorophyta Ulvales Hale`iwa 11Jan.09; coral rock f/2- 20 TCF Not known to be shell-boring FITS1P F193 nK D3/D5 FITSP Ulvella sp. Chlorophyta Ulvales NELHA, on coral rubble f/2- 15 T 20 T not known to be shell-boring F388 FB Barnlo FITSP, Ulvella sp. Chlorophyta Ulvales False Bay, mouth, in barnacle f/2- 15 P, SP contaminated, being cleaned; a and b strains A1b FITS1P F408 KAC5 C5 FITSP Ulvella sp. Chlorophyta Ulvales Ali`i Cove, 2Dec.10 f/2- 20 P F442 Revere B3 FITSP Ulvella sp. Chlorophyta Ulvales Revere Beach, MA, 15Apr11, f/2- 15 P, ST drift, in Crepidula shell F446 Revere B6 FITSP Ulvella sp. Chlorophyta Ulvales Revere Beach, MA, f/2- 15 P, ST 15Apr11, drift, on Littorina shell Alika Page 19 of 20 F514 HSL33- FITS1P Ulvella sp. Chlorophyta Ulvales `Au`au Channel, Maui, f/2- 23 P "a" and "b" clones C4a Hawaii, 100 m depth, on Leptoseris coral F550 HSL36P- FTP Ulvella sp. Chlorophyta Ulvales `Au`au Channel, Maui, f/2- 20 P "a" and "b" clones D6 Hawaii, 100 m depth, on Leptoseris coral F558 HSL46-D1 FTP Ulvella sp. Chlorophyta Ulvales `Au`au Channel, Maui, f/2- 20 P "a" and "b" clones HI, 85 m depth, on Leptoseris coral F601 LeleA B2 FITS1P Ulvella sp. Chlorophyta Ulvales Lele`iwi Street, Hilo, 19.736, -155.011 f/2- 20 P "a" and "b" clones Hawaii, 4Nov11 F646 MBARI [FITS1P] Ulvella sp. Chlorophyta Ulvales Moss Landing, California, 36.8011, - f/2- 15 P "a" and "b" clones; cf. "Entocladia testarum" clam D6 11Jan12, in clam 121.7893 F649 8t alga D5 FITS1P unidentified incertae incertae Royal Kona Resort lagoon, f/2- 20 P golden alga sedis sedis Kailua-Kona, HI, 25Oct11 Alika Page 20 of 20 .