Vegetative morphology and rbcL phylogeny of some members of the genera Botryocladia and Irvinea (Rhodymeniaceae, Rhodophyta)

Abstract

2006. Vegetative morphnlogy and rh(\. phylogeny of some incTiibers of ihe genorii Boiryochiiiiu ;iniJ In-iiu-a (Rhodymeniaceae. Rhodophyla), Phy(olo};ia 43: 481-494.Bou-MKiiulia is a genus of marine red algae (Rhodophyta) generally found in tropical, suhtropical and warm leinperate seas. There are currently 35 described species, bui the laxonomic status of many of these remains confu.scd. Recently, the genus was split into two genera, with the new genus, Irvinea. descrihed based on tnorphological and molecular evidence. Only one species. /. arciri'imu. is currently assigned to the newer genus. For this study, a number of cultured BotryocUidkt and h-viiH-a strains from ihe Mediterranean and Caribbean were examined. Eacb wa.s examined microscopically and tbe key teiitures currently used for identification were evaluated. Up to 1277 bp ofthe rlxL gene was PCR amplified for each isolate and directly sequenced. The. molecular data confirm that the species currently considered as Boiryticladia do not form a nionophvlctic group. Hciryoclndia hoeri-t'seiiii grouped in a clade with /, urdreiimi with the remaining Botryoihidia species in a separate grouping. We propose tbe transfer of Ii. hoer^esenii lo the genus Irvineu on the basis ot the molecular and [norphological data. Morphological and molecular dala for the otber species examined were also evaluated although little correlation between ihe morphological features and ihe r/?rL dala was observed. The taxonomic uliiiiy of some of the morphological features is called into doubt, although clear differences hetween the genera Boiryodadia and Iniiiea can be seen. In addition to ihc morphological features currently regarded as important intergeneric characters, the presence of branched vesicles as an indicator for species of trxiiwti should be added. Kl •. W{iRt)s: Botryocladiu. Irvirwii. Molecular taxonomy, rbcL. Rhodymeniaceae. Rhodophyta. Systematics 481 482 Phycologia. Vol. 45 I5K ZOOfi Tabk I. Isolates from the NUl, Galway Marine Algal Ctiltiirc Collci-tion and si-qLienecs fnnn GenBank used in Ihe rh<L inolceiilar iiiuilyses with (JcnBank and NUl, Galw;iv herbarhirn (Cl.'M.Wi ;iL-L'cssion numbers species Bol ryot India baeraesfitii B. buttyoides B. caiuirii-7ui.\ B. vtiraibicii B. laraibica B. i'hrin\ii B. inadaf>a.\ccinensii B. mimoica fl. occiJentiilis B. ociiJcnla/ix B. ftfcidcntalis B. papt'nJii.YsiiiiKi B-pyiiformis B. sbimksii B. skotfsbi'rRii Biitryo<-laditi sp. (VI) B. spinIIlife-Id B. uviiriiiides Ct'ra toclictyon spong iimiim CordylecUidia crerta Epyitwnia lapi'nsi.i Gustrocloniinn siibtirlicidatum Graieloupia filicina

New Mediterranean Biodiversity Records (June 2012)

“…B. madagascariensis, described from Madagascar, is widely distributed along the Indian Ocean coast of South Africa. Outside that Ocean, it was recorded only from the Canary Islands (Wilkes et al, 2006) and the Mediterranean Sea. The first record of this species in the Mediterranean Sea was by Cormaci et al (1992) from Lampedusa Island (Pelagean Islands) and Castelluccio (Syracuse, Eastern coast of Sicily).…”

Taxonomic transfer of the red algae Chrysymenia enteromorpha and C. wrightii to the genus Botryocladia (Rhodymeniaceae, Rhodymeniales)

“…Currently the genus Botryocladia is generally accepted to include morphologically heterogenous species (Brodie and Guiry 1988;Norris 1989;Fredericq 2003, 2005;Schneider and Lane 2000;Wilkes et al 2006;AfonsoCarrillo et al 2006). Even though molecular studies have begun to reveal more natural groups within the family with the creation of the genus Irvinea and subsequent transfers (Saunders et al 1999, Wilkes et al 2006, species diversity in the Rhodymeniaceae remains under-estimated.…”

“…Even though molecular studies have begun to reveal more natural groups within the family with the creation of the genus Irvinea and subsequent transfers (Saunders et al 1999, Wilkes et al 2006, species diversity in the Rhodymeniaceae remains under-estimated. Several sequences of Botryocladia species downloaded from GenBank that were found to be problematic (i.e.…”

“…Gloiosaccion, a genus limited to the west and south Australian coast, was recently merged with Chrysymenia on the basis of comparative morphology and multi-marker gene phylogenies (Schmidt et al 2016). Recent molecular data have revealed that many of the hollow members that lack diaphragms are not natural groupings and that the generic relationships within the Rhodymeniaceae still require further analyses (Saunders et al 1999, Wilkes et al 2006. We here examine two common species referred to as Chrysymenia enteromorpha Harvey and C. wrightii (Harvey) Yamada.…”

Notas sobre las algas marinas de la Reserva Internacional de la Biosfera Seaflower, Caribe Colombiano VIII: nuevos registros de algas rojas (Rhodophyta) de San Andrés, Providencia y Santa Catalina, Colombia

“…Our specimen presents the most representative vegetative morphological characters of B. bahamensis; however, the size of the vesicles is much smaller (9 mm) compared to that described in B. bahamensis (25 mm). According to Wilkes et al (2006), the difficulty in using vegetative morphology for inferring taxonomic relationships in the Rhodymeniales has been discussed in the past by several authors, who consider that reproductive characters should have a much greater weight. Unfortunately, reproduction has not been well characterized for many species of Botryocladia.…”