The genus Anisotes (Acanthaceae), a taxonomic revision

The genus Anisotes Nees is revised. A total of 24 taxa had previously been described. In the present revision 19 species, 3 subspecies and 1 variety are recognized. A new infrageneric classification of Anisotes is proposed.
In the general part the morphology, with special emphasis on pollen morphology, and the diagnostic characters of the genus are outlined. Phytogeographical and ecological aspects are discussed in relation to the phytogeographical division of Africa.     

The genus Cremastra (Orchidaceae), a taxonomic revision

The genus Cremastra is revised. A total of 8 taxa have earlier been proposed, but in the present revision 2 species are recognized: C. appendiculata and C. unguiculata. Hyacinthorchis variabilis is here considered a variety: C. appendiculata var. variabilis comb. et stat. nov.     

The genus Panisea (Orchidaceae), a taxonomic revision

The genus Panisea is revised. A total of 13 taxa have previously been described. In the present revision 7 species are recognized: P. albiflora, P. apiculata, P. demissa, P. distelidia sp. nov., P. tricallosa, P. uniflora and P. yunnanensis. A new variety, P. tricallosa var. garrettii is proposed.     

The genus Ptyssiglottis (Acanthaceae). A taxonomic monograph

A taxonomic treatment of the genus Ptyssiglottis including Ancylacanthus, Hallieru-cantha, Oreothyrsus , and Polytrema is given. The phylogeny is briefly dealt with. Leaf morphology, inflorescence morphology and pollen morphology yield important characters. The distribution of selected characters is mapped. The distribution of all species is mapped. Eight new species are published viz. P. campanulata, P. decurrens, P. fusca, P. glandulifera, P. longisepala, P mucronata, P. pubescens , and P. staminodifera . Fifteen new combinations are made viz. P. caudata, P. creaghii, P. cuprea, P. cyrtandroides, P. dulcamarioides, P. fastidiosa, P. glabrisepala, P. granulata, P. nigrescens, P. peranthera, P. psychotriifolia, P. pubisepala, P. salicifolia, P. sanguinolenta , and P. undulata .     

The genus Ptyssiglottis (Acanthaceae). A taxonomic monograph

A taxonomic treatment of the genus Ptyssiglottis including Ancylacanthus, Hallieracantha, Oreothyrsus , and Polytrema is given. The phylogeny is briefly dealt with. Leaf morphology, inflorescence morphology and pollen morphology yield important characters. The distribution of selected characters is mapped. The distribution of all species is mapped. Eight new species are published viz. P. campanulata, P. decurrens, P. fusca, P. glandulifera, P. longisepala, P. mucronata, P. pubescens , and P. stamino-difera . Fifteen new combinations are made viz. P. caudata, P. creaghii, P. cuprea, P. cyrtandroides, P. dulcamarioides, P. fastidiosa, P. glabrisepala, P. granulata, P. nigrescens, P. peranthera, P. psychotriifolia, P. pubisepala, P. salicifolia, P. sanguinolenta , and P. undulata .     

Towards a taxonomic revision of the genus Echinococcus

Echinococcus remains a significant public health problem worldwide and, in several regions, the aetiological agents of cystic hydatid disease/echinococcosis are extending their range. The taxonomy of Echinococcus has been a controversial issue for decades, but the outcome of recent molecular epidemiological studies has served to reinforce proposals made ten years ago to revise the taxonomy of Echinococcus. A formal nomenclature is essential for effective communication, and provides the stability that underpins epidemiological investigations. It will also serve to recognize the contribution of early taxonomists.     

The anostracan genus Branchinella (Crustacea: Branchiopoda), in need of a taxonomic revision; evidence from penile morphology

Three morphologically different penile types discovered in branchinellids from Botswana are compared with literature information on congeners. The striking differences among penile structures in Branchinella ondonguae, B. ornata and the halobiontic B. spinosa raise doubts about their congeneric status. Penis morphology in B. ondonguae corresponds with the most common configuration in branchinellids, but it is largely deviant in the other two. Branchinella ornata shares penile structures with Dendrocephalus , while basal parts in B. spinosa reflect affinity with chirocephalids. A considerable general morphological variability in Branchinella , not met in any other anostracan genus, may reflect the antiquity of the group, or else poor taxonomy. Large intra-branchinellid variability and vague generic boundaries, even when considering the usually conservative penile structures, stress the need of a thorough revision of the entire family of the Thamnocephalidae.     

A taxonomic revision of the genus Pachyrhizus (Fabaceae -Phaseoleae)

The genus Pachyrhizus is revised in order to establish the distribution of the species and their variation. Three species in cultivation ( P. erosus, P. tuberosus and P. ahipa ) and two species only occurring in the wild ( P. ferrugineus and P. panamensis ) are recognized. P. strigosus is considered conspecific with P. erosus . All the infraspecific taxa proposed by Clausen are considered untenable. The new combination P. ferrugineus is made for what was previously know as P. vernalis .     

A taxonomic revision of the genus Perdicium (Compositae -Mutisieae)

In connection with a revision of Gerbera L. nom. cons. in Africa the genus Perdicium L. is revised. The genus includes two species, P. capense L. and P. leiocarpum DC. in the Western Cape Region of South Africa.     

Variation in Cryptosporidium: towards a taxonomic revision of the genus

Cryptosporidium is an important cause of enteric disease in humans and other animals. Limitations associated with conventional diagnostic methods for cryptosporidiosis based on morphological features, coupled with the difficulty of characterising parasites isolated in the laboratory, have restricted our ability to clearly identify species. The application of sensitive molecular approaches has obviated the necessity for laboratory amplification. Such studies have found considerable evidence of genetic heterogeneity among isolates of Cryptosporidium from different species of vertebrate, and there is now mounting evidence suggesting that a series of host-adapted genotypes/strains/species of the parasite exist. In this article, studies on the molecular characterisation of Cryptosporidium during the last 5 years are reviewed and put into perspective with the past and present taxonomy of the genus. The predictive value of achieving a sound taxonomy for the genus Cryptosporidium with respect to understanding its epidemiology and transmission and controlling outbreaks of the disease is also discussed.     

A taxonomic revision of the genus Tordylium L. (Apiaceae)

The four related genera: Ainsworthia Boiss., Tordylium L., Synelcosciadium Boiss. and Mandenovia Alava are revised. Data are presented from detailed gross morphology, mericarp surface features and anatomy, and palynology.
The results show: (1) Ainsmorthia and Synelcosciadium are congeneric with the genus Tordylium, and that Mandenovia is a good monotypic genus; (2) Tordylium persicum is synonymous with 7. cappadocicum and 7. aegaeum with 7. pestalozzae; (3) the genus Tordylium is best divided into subgenus Tordylium (including Synelcosciadium) and subgenus Ainsworthia (Boiss.) Drude. The latter is divided into section Condylocarpus (Hoffm.) DC, section Hasselquistia (L.) Boiss. and section Univittata Drude.
A new species of Tordylium is described, and two new combinations made. A taxonomic treatment of the genus 'Tordylium', together with a key to the species, is given.     

A statistical morphological analysis and taxonomic revision of the genus Xiphophora (Fucaceae)

RICE, E. L., 1989. A statistical morphological analysis and taxonomic revision of the genus Xiphophora (Fucaceae). Xiphophora is a brown seaweed endemic to the cool temperature rocky shores of Australia and New Zealand. The two species, X. chondrophylla and X. gladiata have previously been separated by morphological criteria. However, the differences betweeen them in these characters were largely size-related, resulting in taxonomic confusion. In particular, the presence of X. gladiata in New Zealand has been disputed. In this study, a series of discriminant function analyses were performed, based on a suite of morphological characters collected from each species throughout a major portion of their geographic ranges. The results show conclusively that the present taxonomy of Xiphophora is untenable. This genus is composed of two species, but these are distributed latitudinally (either side of the 40^oS parallel). Each species contains two allopatric subspecies; one in Australia and the other in New Zealand. A formal taxonomic revision of the genus is presented.