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| Stock, Jan H.; Vonk, Ronald. |
| Three species of Amphipoda are recorded from interstices of a marine beach on the island of Santiago, Cape Verde Archipelago: Cabogidiella littoralis n. gen., n. sp. (Bogidiellidae), Psammogammarus spinosus n. sp. (Melitidae), and Idunella sketi Karaman, 1980 (Liljeborgiidae). The latter, widely distributed species (West Indies, Canary Islands), is new to the Cape Verde Islands. Furthermore, an isopod is described from the same locality, Caecostenetroides mixtum n. sp. (Gnathostenetroididae). |
| Tipo: Article / Letter to the editor |
Palavras-chave: Amphipoda; Isopoda; Interstitial; Cape Verde Islands. |
| Ano: 1992 |
URL: http://www.repository.naturalis.nl/record/504664 |
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| Stock, Jan H.; Vonk, Ronald. |
| Ascension Island (08° S 14°25’ W) occupies a very peculiar place in our current research project on the biological properties of ground waters of the the Mid-Atlantic islands: -- The island lies closer to the equator than any of the other Mid-Atlantic islands. -- The island lies almost on the Mid-Atlantic Ridge, and far remote from any other insular or continental region. -- The island’s subaerial part consists of very young volcanic outcrops (dated radiometrically at 1-2 My). Through these properties, the comparison of Ascension with the intensively studied Canary Islands (see the series of publications of our team under the collective title “Stygofauna of the Canary Islands”, parts 1 to 19) is of great importance for a better understanding of dispersal... |
| Tipo: Article / Letter to the editor |
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| Ano: 1989 |
URL: http://www.repository.naturalis.nl/record/506341 |
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| Schram, Frederick R.; Vonk, Ronald. |
| Jan Stock was born in western Amsterdam 22 February 1931, the only child of Jan Hendrik Stock, a bank clerk, and Elisabeth Stock-Knevel. He exhibited an early interest as a child in living things, raising plants on a back balcony of his parents apartment and collecting animals during family excursions to the beaches at Zandvoort. However, it was in his early teens in the Hoogere Burgerschool that his interest in biology blossomed where he achieved perfect scores in natural history on his final examinations. He entered the University of Amsterdam in 1948 to pursue his studies of biology and worked under such figures as Profs. L.F. de Beaufort and H. Engel – his predecessors in the chair of Special Zoology – as well as Profs. J.E.W. Ihle and E.J. Slijper. It... |
| Tipo: Article / Letter to the editor |
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| Ano: 1997 |
URL: http://www.repository.naturalis.nl/record/534383 |
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| Vonk, Ronald; Schram, Frederick R.. |
| The suborder Ingolfiellidea currently consists of 39 named species. An historical overview is presented and phylogenetic and biogeographic analyses are made. The result of the phylogenetic analysis suggests the definition of two new genera within an African freshwater group, namely Paraleleupia n. gen. and Proleleupia n. gen. Re-examination of a supposedly Italian relict species, Metaingolfiella mirabitis, with the aid of SEM techniques reveals a half-fusion of the head region with the first pereionite. The issue of the function of the ‘eyelobe’ is addressed and an explanation presented after examining with SEM such lobes in different species. Furthermore, additional descriptions are given based on the type-material of Metaingolfiella mirabilis,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ingolfiellidea; Phylogeny; Biogeography; New genera; Paleogeographic maps; Bibliography. |
| Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/534291 |
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