Description of a new small‐sized Synodontis species (Siluriformes: Mochokidae) that is important for local subsistence fisheries in the middle Lufira (upper Congo River, DR Congo)

2019 ◽  
Vol 96 (5) ◽  
pp. 1142-1159
Author(s):  
Micheline Kasongo Ilunga ◽  
Emmanuel Abwe ◽  
Eva Decru ◽  
Auguste Chocha Manda ◽  
Emmanuel Vreven
Phytotaxa ◽  
2019 ◽  
Vol 402 (5) ◽  
pp. 241 ◽  
Author(s):  
CHRISTINE COCQUYT ◽  
EDIT LOKELE NDJOMBO

During a recently started-up project in the Biosphere Reserve at Yangambi, DR Congo, an unknown Geissleria taxon was observed in a small tributary of the Congo River. This taxon is here described as new to science based on detailed light and scanning electron microscopy observations. Geissleria lubiluensis sp. nov. can be distinguished by the slightly tri-undulate valve margins and the very distinct annulus located at a distance of 3 striae from the apex. The comparison of this taxon with various other Geissleria taxa with resembling valve outline or with resembling annulus structure, led to the description of another new species: Geissleria fogedii sp. nov. reported by Foged from Ghana as Navicula paludosa. This taxon resembles very well Geissleria lubiluensis but differs in the distinct annulus located closer to the apex mostly at the distance of one stria, the broader valves and the denser striation.


2019 ◽  
Vol 26 (6) ◽  
pp. 1676-1692
Author(s):  
Henry K. Mata ◽  
Periyasamy Sivalingam ◽  
Joel Konde ◽  
Jean-Paul Otamonga ◽  
Birane Niane ◽  
...  

2013 ◽  
Vol 59 ◽  
pp. 290-302 ◽  
Author(s):  
Vera Verhaert ◽  
Adrian Covaci ◽  
Steven Bouillon ◽  
Katya Abrantes ◽  
Dieudonné Musibono ◽  
...  

Author(s):  
Hiroyuki Takemoto ◽  
Yoshi Kawamoto ◽  
Takeshi Furuichi

The Congo River functions as a strong geographical barrier for many terrestrial mammals in the Congo Basin, separating forest habitat into right and left banks of the river. However, there has been little discussion on the biogeography of the Congo Basin because the history of the river has been obscured. Based on the recent information of the sea-floor sediments near the mouth of the river and the geophysical survey on the continent, this chapter proposes a plausible hypothesis on the Congo River formation and presents a consequent hypothesis on the divergence of bonobos (Pan paniscus) from other Pan populations. The present hypothesis is also helpful for understanding the distribution of other primates and other mammals in the basin. Furthermore, this hypothesis suggests that all hominid clades, including human, chimpanzee and gorilla, except bonobo, evolved in the area north or east of the Congo River. La rivière du Congo a la fonction d’une barrière géographique forte pour plusieurs mammifères dans le bassin du Congo, séparant l’habitat forêt dans les banques gauches et droites de la rivière. Cependant, il y a eu peu de discussions sur la biogégraphie du bassin du Congo, parce que l’histoire de la rivière a été voilée. Récemment, quelque données importantes qui peuvent avoir des liens avec la formation de la rivière du Congo ont été acquise, surtout par la recherche des sédiments du fond marin près de la bouche de la rivière et par l’enquête géographique du continent. À partir de cette nouvelle information, nous avons proposé une hypothèse plausible sur la formation de la rivière du Congo. Nous avons aussi présenté une hypothèse conséquente sur la divergence des bonobos (Pan paniscus) des autres populations Pan (voire Takemoto et al., 2015 pour la publication originale de cette étude). L’hypothèse présente nous aide aussi à comprendre la distribution des autre primates et des autres mammifères dans le bassin. De plus, cette hypothèse suggère que tous les hominidés clades, humains inclus, chimpanzés et gorilla à l’exception du bonobo, ont évolué dans la régions du nord ou de l’est de la rivière du Congo.


2014 ◽  
Vol 55 (1) ◽  
pp. 55-78 ◽  
Author(s):  
Paul E. Lovejoy

AbstractA reassessment of the institution of pawnship in Africa for the period from the seventeenth century to the nineteenth century tightens the reference to situations in which individuals were held as collateral for debts that had been incurred by others, usually relatives. Contrary to the assumptions of some scholars, pawnship was not related to poverty and enslavement for debt but rather to commercial liquidity and the mechanisms by which funds were acquired to promote trade or to cover the expenses of funerals, weddings, and religious obligations. A distinction is made, therefore, between enslavement for debt and pawnship. It is demonstrated that pawnship characterized trade with European and American ships in many parts of Atlantic Africa, but not everywhere. While pawnship was common north of the Congo River, at Gabon, Cameroon, Calabar, the interior of the Bights of Biafra and Benin, the Gold Coast, and the upper Guinea coast, it was illegal in most of Muslim Africa and the Portuguese colony of Angola, while it was not used in commercial dealings with Europeans at Bonny, Ouidah, and other places.


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