152,895 species and infraspecific names are in the database, 20,947 images, 59,136 bibliographic items, 408,271 distributional records.

Taxonomy Detail

Family Mesophyllaceae

Mesophyllaceae Athanasiadis, 2016: 251 (footnote 1).

Uncertain name.

Type of name: Mesophyllum Me.Lemoine

Original publication: Athanasiadis, A. (2016). Phycologia Europaea Rhodophyta Vol. I. pp. [i]-xxxxviii, 1-762. Thessaloniki: Published and distributed by the author.

Description:
Family of Corallinales segregated from other members of the suborder Mesophyllllneae in possessing a central fusion cell with peripheral production of carposporangla, spermatangla of predominantly 'simple' structure - 'dendroid' ones sporadically observed In Leptophytum and certain members of Synarthrophyton, epithalllal cells generally flattened to roundish (neither flared, nor domed), and hypothallium predominantly coaxial in Melyvonnea and Mesophyl/um, to non-coaxial or with rare coaxial patches in the other members.

Comments:
Athansiadis (2016: 251) considers that "Mesophyllaceae encompass 5 genera in the Northern Hemisphere (Clathromorphum s.I., Kvaleya, Leptophytum, Melyvonnea, and Mesophyl/um) and certain species of the Southern Hemisphere genus Synarthrophyton Townsend (the type material of which has not been re-examined).'

Nomenclatural notes:

The Mesophyllaceae Heeg (1891) is based on the genus Mesophylla Dumortier (1822). Although validly published, Mesophylla Dumortier is illegitimate (Art. 52) because the genus originally (Dumortier 1822) included the type of Nardia S.F. Gray (1821), as noted in the Index Nominum Genericorum. The illegitimacy of Mesophylla Dumortier renders the family name Mesophyllaceae (Dumortier) Heeg illegitimate (Art. 18.3). Nevertheless, the illegitimate name Mesophyllaceae (Dumortier) Heeg (1891) remains an earlier homonym of the validly published name Mesophyllaceae Athanasiadis (2016), which is therefore a later homonym (Art. 53.1) and thus also illegitimate and to be rejected [Art. 53.1, Note 1. "A validly published earlier homonym, even if illegitimate or otherwise generally treated as a synonym, causes rejection of any later homonym that is not conserved or sanctioned (but see Art. 53.2)"]. The valid publication of the name Mesophyllaceae Heeg is, however, questioned by Athanasiadis (pers. comm., 10 January 2018).

References
(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Athanasiadis, A. (2017). Capensia fucorum (Esper) gen. et comb. nov. (Mesophyllaceae, Corallinales, Rhodophyta), a hemiparasite on Gelidium from South Africa. Botanica Marina 60(5): 555-565.

Linking to this page: http://www.algaebase.org/browse/taxonomy/detail/?taxonid=163008

Citing AlgaeBase
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 21 September 2018.

Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:163008

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