Two new species from northeastern Somalia, Dicoma paivae and Dicoma cinerea (Asteraceae), both of section Psilocoma Harv., are described. Dicoma paivae is most similar to Dicoma cana Balf. f. of Socotra Island, from which it can be distinguished by its wider, twisted branches, larger, aristate, conduplicate leaves, smaller capitula, and straw-coloured, coriaceus inner phyllaries. Dicoma cinerea is very closely related to Dicoma schimperi (DC.) O. Hoffm. of northeast tropical Africa and the Arabian Peninsula, from which it can be distinguished by the dense whitish tomentum covering the whole plant and by its broadly ovate to almost orbicular leaves with margins bearing bulbous teeth. Key words: Asteraceae, Dicoma, new species, tropical Africa, Somalia.
AbstractTwo new species belonging to the lichen families Pilocarpaceae and Ectolechiaceae are described from tropical Africa: Calopadia lucida sp. nov. (Ectolechiaceae) from Tanzania, being similar to C. puiggarii but differing in the UV fluorescent thallus and the pruinose apothecia, and Fellhanera ivoriensis sp. nov. (Pilocarpaceae) from the Ivory Coast, differing from the related F.rhapidophylli by the sorediate thallus and from other sorediate taxa by the combination of pale soralia, dark brown apothecia, and the ellipsoid-bacillar conidia. A key to the nine sorediate species of Fellhanera is provided.
The genus Herschelia (Disinae, Orchidaceae) is revised. Sixteen species, one subspecies and one variety are recognized. Two new species from tropical Africa (H. chimanimaniensis Linder and H. praecox Linder) and a new variety from the Cape Province H. lugens (H. Bol.) Kraenzl. var. nigrescens Linder are described. Three new combinations are made by transferring the two species of Forficaria and Disa sect. Microperistera (one species) to Herschelia. Thirteen species are illustrated, and the nomenclature and the available information about the habitats of the taxa are discussed. The species are grouped into two subgenera, one of which is further divided into two sections and four series. This classification is based on the putative phylogeny, as determined by the method devised by Wagner (1962).
Information relating to a number of miscellaneous Acacia species from tropical Africa, is presented. Two new species, A. manubensis and A. pseudonigrescens, are described.
Cassida butterwecki sp. nov. and Cassida morondaviana sp. nov. are described from Madagascar. Both are unique species and have no close relatives in Madagascar or tropical Africa. Subgeneric division of the genus Cassida Linnaeus, 1758 is discussed.
Abstract
Raunolina Gnezdilov & Wilson, 2006 erected as a subgenus of Perissana Metcalf, 1952 is upgraded to generic level. Raunolina remanei sp. nov. is described from northeastern Sudan, which is the first record of the genus and the tribe Adenissini Dlabola, 1980 from tropical Africa, and R. jeddahica sp. nov. is described from western Saudi Arabia. Two new combinations are provided: Raunolina circularis (Linnavuori, 1952), comb. nov. and Raunolina arabica (Gnezdilov & Wilson, 2006), comb. nov.; R. arabica is recorded for the first time from Yemen. A key to separate the genera Perissana and Raunolina as well as a key to species of Raunolina are given. The global distribution of Adenissini is discussed.
The author describes Phaneroptera abdita n. sp., characterized by only two apical spurs; two new species of Eulioptera, E. iolandae n. sp. with unarmed fore coxae, E. atypica n. sp., with atypical opaque tegmina; and Scolocerca thomasi n. sp., all from West Tropical Africa. In addition, he discusses on the probable only African distribution of Phaneroptera sparsa Stål, 1857, and transfers Dithela longicaudata Massa, 2017 to the genus Eulioptera Ragge, 1956.
First record of the genus Raunolina (Hemiptera: Fulgoroidea: Caliscelidae) from tropical Africa with description of two new species from Sudan and Saudi Arabia
