scholarly journals XIII.—A review of South-African Land-Mollusca belonging to the family Zonitidæ

1912 ◽  
Vol 9 (49) ◽  
pp. 122-139 ◽  
Author(s):  
H.H. Godwin-Austen
Keyword(s):  
Author(s):  
Carol Simon ◽  
Guillermo San Martín ◽  
Georgina Robinson

Two new species of South African Syllidae of the genusSyllisLamarck, 1818 are described.Syllis unzimasp. nov. is characterized by having unidentate compound chaetae with long spines on margin, a characteristic colour pattern and its reproduction by vivipary. Vivipary is not common among the polychaetes, but most representatives occur in the family Syllidae Grube, 1850 (in five otherSyllisspecies, two species ofDentatisyllisPerkins, 1981 and two species ofParexogoneMesnil & Caullery, 1818).Syllis unzimasp. nov. differs from the other viviparous species in having large broods (>44 juveniles) which develop synchronously. Development of the juveniles is similar to that of free-spawningSyllisspecies, but the appearance of the first pair of eyespots and the differentiation of the pharynx and proventricle occur later inS. unzima.Syllis amicarmillarissp. nov., is characterized by having an elongated body with relatively short, fusiform dorsal cirri and the presence of one or two pseudosimple chaeta on midbody parapodia by loss of blade and enlargement of shaft.Syllis unzimasp. nov. was found in high densities on culturedHolothuria scabraJaeger, 1833 with single specimens found on a culturedCrassostrea gigasThunberg, 1793 and on coralline algae, respectively, whileS. amicarmillariswas found mainly in sediment outside an abalone farm and less frequently on culturedHaliotis midaeLinnaeus, 1758. We discuss the possible benefits of the association withH. scabratoS. unzimasp. nov.


1996 ◽  
Vol 26 (3) ◽  
pp. 123-134 ◽  
Author(s):  
Amanda Kottler ◽  
Judith Soal

This study attempts to challenge the prevailing understanding of family problems within the field of family therapy. Drawing on post-structuralist approaches to knowledge, truth and power, we suggest that the problems experienced by the families cannot be seen to have an objective existence, or to be internal to the ‘family unit’. Rather, the problem-saturated narratives presented by families are shaped by an investment in socially constructed knowledges which ascribe meaning to experience. A discourse analytic approach is used to explore the dominant narratives of a coloured South African family presenting for family therapy. Discourses of civilization, ideal mothers and families, and therapy are considered to have informed these narratives. An analysis of the implications of these discursive investments, and the contradictions within and between these discourses, is conducted. This analysis suggests the manner in which this family is subjugated and rendered damaged and deficient through an aspiration to unobtainable and contradictory ideals. The study also examines the way in which the truth claims of these discourses are challenged by a therapist adopting a narrative approach to family therapy.


1993 ◽  
Vol 67 (4) ◽  
pp. 549-570 ◽  
Author(s):  
Bruce S. Lieberman

Phylogenetic parsimony analysis was used to classify the Siegenian–Eifelian “Metacryphaeus group” of the family Calmoniidae. Thirty-eight exoskeletal characters for 16 taxa produced a shortest-length cladogram with a consistency index of 0.49. A classification based on retrieving the structure of this cladogram recognizes nine genera: Typhloniscus Salter, Plesioconvexa n. gen., Punillaspis Baldis and Longobucco, Eldredgeia n. gen., Clarkeaspis n. gen., Malvinocooperella n. gen., Wolfartaspis Cooper, Plesiomalvinella Lieberman, Edgecombe, and Eldredge (used to represent the malvinellid clade), and Metacryphaeus Reed. The malvinellid clade is most closely related to a revised monophyletic Metacryphaeus. Typhloniscus is the basal member of the “Metacryphaeus group,” and the monotypic Wolfartaspis is sister to the clade containing the malvinellids and Metacryphaeus. Six new species are diagnosed: Punillaspis n. sp. A, “Clarkeaspis” gouldi, Clarkeaspis padillaensis, Malvinocooperella pregiganteus, Metacryphaeus curvigena, and Metacryphaeus branisai. Primitively, this group has South African and Andean affinities, and its evolutionary history suggests rapid diversification. In addition, evolutionary patterns in this group, and the distribution of character reversals, call into question certain notions about the nature of adaptive radiations. The distributions of taxa may answer questions about the number of marine transgressive/regressive cycles in the Emsian–Eifelian of the Malvinokaffric Realm.


Queer Kinship ◽  
2019 ◽  
pp. 22-32 ◽  
Author(s):  
Catriona Ida Macleod ◽  
Tracy Morison ◽  
Ingrid Lynch

Author(s):  
Heilna du Plooy

N. P. Van Wyk Louw is regarded as the most prominent poet of the group known as the Dertigers, a group of writers who began publishing mainly in the 1930s. These writers had a vision of Afrikaans literature which included an awareness of the need of thematic inclusiveness, a more critical view of history and a greater sense of professionality and technical complexity in their work. Van Wyk Louw is even today considered one of the greatest poets, essayists and thinkers in the Afrikaans language. Nicolaas Petrus van Wyk Louw was born in 1906 in the small town of Sutherland in the Western Cape Province of South Africa. He grew up in an Afrikaans-speaking community but attended an English-medium school in Sutherland as well as in Cape Town, where the family lived later on. He studied at the University of Cape Town (UCT), majoring in German and Philosophy. He became a lecturer at UCT, teaching in the Faculty of Education until 1948. In 1949 he became Professor of South African Literature, History and Culture at the Gemeentelijke Universiteit van Amsterdam. In 1960 he returned to South Africa to become head of the Department of Afrikaans and Dutch at the University of the Witwatersrand in Johanneshurg. He filled this post until his death in 1970.


Zootaxa ◽  
2004 ◽  
Vol 725 (1) ◽  
pp. 1 ◽  
Author(s):  
TOUFIEK SAMAAI ◽  
VASHA GOVENDER ◽  
MICHELLE KELLY

The new genus Cyclacanthia n.g. is erected in the poecilosclerid Family Latrunculiidae for the type species Latrunculia bellae Samaai & Kelly, 2003, and two further species, Cyclacanthia cloverlyae sp. nov., and Cyclacanthia mzimayiensis sp. nov.. The latter species are from the subtropical east coast of South Africa, whereas C. bellae has only been found further south in warm temperate Algoa Bay. Cyclacanthia n.g. differs from other Latrunculiidae genera in the ontogeny, morphology and structure of the mature microsclere, the isospinodiscorhabd, which has only three major whorls of projections as opposed to the four in species of Latrunculia du Bocage. Additional diagnostic characters include the presence of broad swathes of megascleres that diverge from the base of the sponge towards the upper choanosome, where they form loose brushes and the typical whispy reticulation of most Latrunculiidae. The ectosome is composed of a dense tangential layer of megascleres, an irregular palisade of microscleres at the surface, and a permanently encrusting habit. Cyclacanthia n.g. is the second new latrunculid genus recently described from shallow subtidal South African waters, following major revision of the family. The presence of species in four of the five known genera in the family, on South African coastlines, suggests a diversity hot-spot for the family in this region.


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