Morphology and anatomy of Spongites africanum comb. nov. (Corallinaceae, Rhodophyta) from the Cape Verde Islands

Afonso-Carrillo, J., M. Chacana & M. Sansón. 1993. Morphology and anatomy of Spongites africanum comb. nov. (Corallinaceae, Rhodophyta) from the Cape Verde Islands. CFS Courier Forschungsinstitut Senckenberg 159: 133-137.On the basis of critical studies on the morphology and anatomy of the holotype collection and new material from the Cape Verde Islands, Lithophyllum africanum FOSLIE (= Porolithon africanum (FOSLIE) FOSLIE) is transferred to the genus Spongites KUT ZING. Plants of Spongites africanum (FOSLIE) AFON SO-CARRILLO, CHACANA & SANSON comb. nov. form subhemispherical masses, about 10 cm diameter, with a crustose portion and numerous compressed and confluent erect protuberances. Three of the five characters used to circumscribe Spongites are present in the holotype of Lithophyllum africanum: cells of contigous filaments interconnected by cell fusions, thallus composed of numerous layers of cells and normally over 200 pm thick and thallus devoid of a coaxial core of filaments. Uniporate tetrasporangial concept acles and tetrasporangia devoid of apical plugs, are the only characters not apparent in the holotype, but its are evident in the material examined from the Cape Verde Islands

Codium (Chlorophyta) species presented in the Galápagos Islands

Background. The Galápagos Islands have been the subject of numerous scientific expeditions. The chief source of information on their marine algae is the report published in 1945 by the late William Randolph Taylor on collections made by the Allan Hancock Pacific Expedition of 1934. Prior to this work, there were no published records of Codium from the Galápagos. Taylor recorder six species of Codium of which C. isabelae and C. santamariae were new descriptions. Goals. On the basis of collections made since 1939, we have reviewed the registry of Codium in these islands. Methods. Comparative analysis based on morphology and utricle anatomy. Results. Codium isabelae and C. santamariae are combined under the former name. Records of C. cervicorne and C. dichotomum also are referred to C. isabelae, those of C. setchellii are based partly on representatives of C. picturatum, a recently described species from the Mexican Pacific, Panama, Colombia, and Hawaii, and partly on representatives of a species similar if not identical to C. arabicum. The presence of C. foveolatum is corroborated. Codium fernandezianum, which was also reported by Taylor from the mainland of Ecuador, has been collected on Isla Santa Cruz. Conclusions. Five species of Codium are recognized from Galápagos Islands: C. arabicum, C. fernandezianum, C. foveolatum, C. isabelae and C. picturatum

<I>Codium apiculatum</I> (Codiaceae, Chlorophyta), a new species from southern and southwestern Australia

Une nouvelle espèce de Codium, C. apiculatum P.C. Silva, M.E. Chacana et H.B.S. Womersley, est décrite sur la base de quelques spécimens subtidaux du sud et sud-ouest d\u27Australie. Elle est caractérisée par ses utricules, qui sont robustes, sous-cylindriques ou plutôt claviformes, portant plusieurs cheveux ou cicatrices de cheveux auprès du sommet, et par les bouts des rameaux, qui sont apiculés.A new species of Codium, C. apiculatum P.C. Silva, M.E. Chacana et H.B.S. Womersley, is described on the basis of several subtidal collections from southern and southwestern Australia. It is characterized by its utricles, which are stout, subcylindical to slightly clavate, bearing several hairs (or hair scars) very close to the apex, and by the branch tips, which are apiculate.</p