Catalog of the Benthic Marine Algae of the ... - SeaweedAfrica

NUMBER 27 131
Gmelin (1792:1382, 1383) erred in the same manner as
Swartz, retaining the junior homonym and substituting the
name Fucus triangularis for the Caribbean alga (which was
called Bryothamnion triangulare until Howe pointed out the
illegitimacy of that name). On transferring F. triqueter Linnaeus
to Cystoseira, C. Agardh (1820b:61) provided a binomial
(C. triquetra) that may be treated as a nomen novum
in accordance with Article 72, Note 1, of the ICBN.
The second pair of homonyms was Fucus articulatus S.G.
Gmelin (1768:77) and F. articulatus Forsskal (1775:191).
The first species was described, but not illustrated (the
reference to pi. II: fig. 1, apparently being erroneous,
judging from the legend and a comparison of the cited
figure with the description). The provenance was said to be
"Oceanus Indicus." In the absence of a type specimen, a
definitive identification is not possible. The Forsskal species
was united with F. triqueter Linnaeus in the genus Cystoseira
by C. Agardh (1820b: 61), and subsequent authors have
considered the two species as congeneric, but not always
conspecific. J. Agardh (1848:215-216) recognized separate
species, and on transferring F. articulatus Forsskal to Cystoseira,
provided a binomial (C. articulata) that may be treated
as a nomen novum in accordance with Article 72, Note 1,
of the ICBN. On the basis of priority or perhaps purely by
chance, J.F. Gmelin (1792:1381, 1389) retained the senior
homonym and substituted the name Fucus cuneiformis for
F. articulatus Forsskal. By an examination of Forsskal's
collection at Copenhagen (C), B0rgesen (1932:11) confirmed
that Fucus articulatus Forsskal is referable to Hormophysa.
Hence, Fucus cuneiformis is the earliest legitimate
name for this species and its correct name is Hormophysa
cuneiformis (J.F. Gmelin) P.C. Silva, new combination.
Validation of the Green Algal Order Ctendocladales
The order Ctenocladales was proposed by Silva
(1982:147) to accommodate those green algae previously
placed in the Chaetophoraceae with ulvophycean rather
than chlorophycean ultrastructure. The nature of the publication
(an encyclopedia) precluded the provision of a Latin
diagnosis essential to the validity of the name. Validation is
effected herewith: Chlorophytae (algae virides) filamenta
uniseriata ramosa aut sarcinas cellularum constantes; thallus
erectus aut prostratus aut heterotrichus, filamentis prostratis
libris aut cohaerentibus; cellulae omnes nucleum unum
et chloroplastum singulum parietalem laminatem plerumque
pyrenoidibus thylakoidiperductis (uno aut aliquot)
continentes; cellulae motiles squamatae aut nudae cum uno
aut multis flagellis; flagella apicaliter affixa, symmetrica
radialiter, cum systemate radicum microtubulare cruciato,
radicibus rotationem contra horologii habentibus; cytokinesis
per sulco cum phycoplasto nihil consociato effectus.
Familia typificata: Ctenocladaceae (Borzi) Borzi
(1892:48, "Ctenocladiaceae").