An assessment of the taxonomic status of the Mediterranean endemic genus Acrodiscus Zanardini (Halymeniales, Rhodophyta)

  • Antonio Manghisi Institut de Systématique, Évolution, Biodiversité, ISYEB - UMR 7205 - CNRS, MNHN, UPMC, EPHE, Muséum national d'Histoire naturelle, Sorbonne Universités, 57 rue Cuvier, CP 39, 75005 Paris
  • Line Le Gall Institut de Systématique, Évolution, Biodiversité, ISYEB - UMR 7205 - CNRS, MNHN, UPMC, EPHE, Muséum national d'Histoire naturelle, Sorbonne Universités, 57 rue Cuvier, CP 39, 75005 Paris
  • Céline Bonillo Institut de Systématique, Évolution, Biodiversité, ISYEB - UMR 7205 - CNRS, MNHN, UPMC, EPHE, Muséum national d'Histoire naturelle, Sorbonne Universités, 57 rue Cuvier, CP 39, 75005 Paris
  • Gaetano M. Gargiulo Dept. of Chemical, Biological, Pharmaceutical and Environmental Sciences - Botany, University of Messina, Salita Sperone, 31, 98166 Messina
  • M. Antonia Ribeira Laboratori de Botànica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s/n, 08028 Barcelona
  • Marina Morabito Dept. of Chemical, Biological, Pharmaceutical and Environmental Sciences - Botany, University of Messina, Salita Sperone, 31, 98166 Messina
Keywords: DNA barcoding, Mediterranean endemic, lectotype, morphology, phylogeny, Acrodiscus


Acrodiscus Zanardini is a poorly known monotypic endemic Mediterranean genus based on A. vidovichii (Menegh.) Zanardini. Rarely reported, its reproductive structures have remained undocumented, leaving its exact taxonomic position uncertain. Solely on the basis of its vegetative structure, Zanardini provisionally placed it in the family Cryptonemiaceae of the order Cryptonemiales (currently the Halymeniaceae of the Halymeniales), although he was uncertain as to whether the new genus actually belonged to that family or should instead be included in the Gigartinaceae of the Gigartinales (where Meneghini had originally placed it). In the present study we have extensively sampled A. vidovichii and documented its vegetative and tetrasporangial features. As well, we provide molecular-sequence data (COI-5P, rbcL, LSU) that indicate its phylogenetic affinities. We confirm Acrodiscus as a member of the Halymeniaceae and its status as an independent genus. Searches of several institutional herbaria have allowed us to locate and lectotypify Meneghini’s Chondrus? vidovichii by the discovery of his original material now held at the Herbarium Horti Pisani (Pisa, Italy).


Agardh J.G. 1842. Algae maris Mediterranei et Adriatici, observationes in diagnosin specierum et dispositionem generum Apud Fortin, Masson et Cie., Parisiis [Paris].

Agardh J.G. 1851. Species genera et ordines algarum, seu descriptiones succinctae specierum, generum et ordinum, quibus algarum regnum constituitur. Volumen secundum: algas florideas complectens. Pars Prior. C.W.K. Gleerup, Lundae [Lund].

Aleem A.A. 1993. The marine algae of Alexandria, Egypt. Alexandria.

Altekar G., Dwarkadas S., Huelsenbeck J.P. & Ronquist F. 2004. Parallel Metropolis coupled Markov chain Monte Carlo for Bayesian phylogenetic inference. Bioinformatics 20: 407–15.

Ardissone F. 1883. Phycologia Mediterranea I. Floridee. Memorie della Società Crittogamologica Italiana 1: i–x, 1–516.

Athanasiadis A. 1987. A Survey of the Seaweeds of the Aegean Sea with Taxonomic Studies on Species of the Tribe Antithamnieae (Rhodophyta). XXX Thesis. University of Gothenburg. Department of Marine Botany, Gothenburg.

Bory de Saint-Vincent J.B.G.M. 1828. Famille des Halyméniées. In: Duperrey L.-I. (ed.) Voyage autour du Monde, éxécuté par Ordre du Roi, sur la Corvette de Sa Majesté, La Coquille, pendant les années 1822, 1823, 1824 et 1825. Tome 1 Botanique: 158–181. Arthus Bertrand, Paris.

Calderon M.S., Boo G.H. & Boo S.M. 2014. Morphology and phylogeny of Ramirezia osornoensis gen. & sp. nov. and Phyllymenia acletoi sp. nov. (Halymeniales, Rhodophyta) from South America. Phycologia 53: 23–36.

Chiang Y.M. 1970. Morphological studies of red algae of the family Cryptonemiaceae. University of California Publications in Botany 58: 1–95.

Clark K., Karsch-Mizrachi I., Lipman D.J., Ostell J. & Sayers E.W. 2016. GenBank. Nucleic Acids Research 44: D67–D72.

Cronquist A. 1960. The divisions and classes of plants. The Botanical Review 26: 425–482.

De Toni G.B. 1905. Sylloge Algarum Omnium hucusque Cognitarum. Vol. IV. Florideae. Sectio IV. Patavii [Padova].

Ercegović A. 1949. Sur quelques algues rouges, rares ou nouvelles, de l’Adriatique. Acta Adriatica 4: 1–81.

Feldmann J. 1939. Les algues marines de la côte des Albères. IV. – Rhodophycées. Revue Algologique 11: 247–330.

Felsenstein J. 1985. Confidence limits on phylogenies with a molecular clock. Systematic Zoology 34: 152–61.

Freshwater D.W. & Rueness J. 1994. Phylogenetic relationships of some European Gelidium (Gelidiales, Rhodophyta) species based on rbcL nucleotide sequence analysis. Phycologia 33: 187–94.

Gargiulo G.M., Morabito M. & Manghisi A. 2013. A re-assessment of reproductive anatomy and postfertilization development in the systematics of Grateloupia (Halymeniales, Rhodophyta). Cryptogamie: Algologie 34: 3–35.

Gascuel O. 1997. BIONJ: An improved version of the NJ algorithm based on a simple model of sequence data. Molecular Biology and Evolution 14: 685–95.

Gouy M., Guindon S. & Gascuel O. 2010. SeaView version 4: a multiplatform graphical user interface for sequence alignment and phylogenetic tree building. Molecular Biology and Evolution 27: 221–24.

Guindon S. & Gascuel O. 2003. A simple, fast, and accurate algorithm to estimate large phylogenies by Maximum Likelihood. Systematic Biology 52: 696–704.

Guiry M.D. & Guiry G.M. 2016. AlgaeBase [online]. Available from [accessed 27 Jan. 2016].

Harper J.T. & Saunders G.W. 2001. Molecular systematics of the Florideophyceae (Rhodophyta) using nuclear large and small subunit rDNA sequence data. Journal of Phycology 37: 1073–82.

Hauck F. 1885. Die Meeresalgen Deutschlands und Österreichs. Eduard Kummer, Leipzig.

Huelsenbeck J.P. 2002. Testing a covariotide model of DNA substitution. Molecular Biology and Evolution 19: 698–707.

Kraft G.T. & Saunders G.W. 2014. Crebradomus and Dissimularia, new genera in the family Chondrymeniaceae (Gigartinales, Rhodophyta) from the central, southern and western Pacific Ocean. Phycologia 53: 146–166.

Kützing F.T. 1849. Species Algarum. F.A. Brockhaus, Lipsiae [Leipzig].

Kützing F.T. 1867. Tabulae Phycologicae; oder, Abbildungen der Tange. Vol. 17. W. Köhne, Nordhausen.

Kylin H. 1956. Die Gattungen der Rhodophyceen. Gleerups, Lund.

Manghisi A., Gómez Garreta A. & Ribera M.A. 2010. Mapas de distribución de algas marinas de la península Ibérica y las islas Baleares. XXV. Acrodiscus vidovichii (Meneghini) Zanardini and Aeodes marginata (Roussel) F. Schmitz (Halymeniales, Rhodophyta). Botanica Complutensis 34: 95–98.

Manghisi A., Morabito M., Bertuccio C., Le Gall L., Couloux A., Cruaud C. & Genovese G. 2010. Is routine DNA barcoding an efficient tool to reveal introductions of alien macroalgae? A case study of Agardhiella subulata (Solieriaceae, Rhodophyta) in Cape Peloro lagoon (Sicily, Italy). Cryptogamie: Algologie 31: 423–433.

Manghisi A., Le Gall L., Ribera M.A., Bonillo C., Gargiulo G.M. & Morabito M. 2014. The Mediterranean endemic new genus Felicinia (Halymeniales, Rhodophyta) recognized by a morphological and phylogenetic integrative approach. Cryptogamie, Algologie 35: 221–43.

Mineur F., De Clerck O., Le Roux A., Maggs C.A. & Verlaque M. 2010. Polyopes lancifolius (Halymeniales, Rhodophyta), a new component of the Japanese marine flora introduced to Europe. Phycologia 49: 86–96.

Nelson W.A., Kim S.Y. & Boo S.M. 2014. Transfer of the subantarctic red alga Grateloupia aucklandica to the genus Glaphyrosiphon (Halymeniales, Rhodophyta). Phycologia 53: 457–462.

Preda A. 1908. Flora Italica Cryptogama Pars II: Algae – Vol. 1 Fasc. 2. L. Cappelli, Rocca San Casciano.

Ronquist F. & Huelsenbeck J.P. 2003. MrBayes 3: Bayesian phylogenetic inference under mixed models. Bioinformatics 19: 1572–1574.

Saunders G.W. & Kraft G.T. 1996. Small-subunit rRNA gene sequences from representatives of selected families of the Gigartinales and Rhodymeniales (Rhodophyta). 2. Recognition of the Halymeniales ord. nov. Canadian Journal of Botany 74: 694–707.

Saunders G.W. & Hommersand M.H. 2004. Assessing red algal supraordinal diversity and taxonomy in the context of contemporary systematic data. American Journal of Botany 91: 1494–1507.

Saunders G.W. & McDevit D.C. 2012. Chapter 10. Methods for DNA barcoding photosynthetic protists emphasizing the macroalgae and diatoms. In: Kress W.J. & Erickson D.L. (eds) DNA Barcodes: Methods and Protocols: 207–22. Humana Press, New York.

Savi P. 1841. Sezione di botanica, e fisiologia vegetabile. Adunanza del dì 16 Settembre 1841. In: Atti della Terza Riunione degli Scienziati Italiani, tenuta in Firenze nel Settembre del 1841: 424–31. Galileiana, Firenze.

Schmitz F. 1889. Systematische Übersicht der bisher bekannten Gattungen der Florideen. Flora 72: 435–456.

Swofford D.L. 2002. PAUP*. Phylogenetic Analysis Using Parsimony (*and Other Methods), v. 4.0b10. Sinauer Associates, Sunderland, Massachusetts.

Thiers B.M. Continously updated. Index Herbariorum: A Global Directory of Public Herbaria and Associated Staff [online]. Available from [accessed 27 Jan. 2016].

Wang H.W., Kawaguchi S., Horiguchi T. & Masuda M. 2000. Reinstatement of Grateloupia catenata (Rhodophyta, Halymeniaceae) on the basis of morphology and rbcL sequences. Phycologia 39: 228–237.

Wettstein R.V. 1901. Handbuch der systematischen Botanik. Vol. 1. Franz Deuticke, Leipzig and Vienna.

Withall R. & Saunders G.W. 2006. Combining small and large subunit ribosomal DNA genes to resolve relationships among orders of the Rhodymeniophycidae (Rhodophyta): recognition of the Acrosymphytales ord. nov. and Sebdeniales ord. nov. European Journal of Phycology 41: 379–394.

Womersley H.B.S. & Lewis J.A. 1994. Family Halymeniaceae Bory 1828: 158. In: Womersley H.B.S. (ed.) The Marine Benthic Flora of Southern Australia. Part IIIA. Bangiophyceae and Florideophyceae (Acrochaetiales, Nemaniales, Gelidiales, Hildebrandiales and Gigartinales sensu lato): 167–218. Australian Biological Resources Study, Canberra.

Zanardini G. 1843. Saggio di Classificazione Naturale delle Ficee, del Dottor Giuseppe Zanardini aggiunti Nuovi Studii sopra l’Androsace degli Antichi con Tavola Miniata ed Enumerazione di tutte le Specie Scoperte e Raccolte dall’Autore in Dalmazia. Girolamo Tasso, Venice.

Zanardini G. 1868. Scelta di ficee nuove o più rare dei mari Mediterraneo ed Adriatico. Figurate, descritte ed illustrade dal M.E. Dott. G. Zanardini. Memorie del Reale Istituto Veneto di Scienze, Lettere ed Arti 14: 179–216.

How to Cite
Manghisi, A., Le Gall, L., Bonillo, C., Gargiulo, G. M., Ribeira, M. A., & Morabito, M. (2017). An assessment of the taxonomic status of the Mediterranean endemic genus Acrodiscus Zanardini (Halymeniales, Rhodophyta). European Journal of Taxonomy, (267).