P. Weekers

Publications24
h-index13
Citations677
Highly Influential Citations37
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Phylogenetic relationships inferred from ribosomal its sequences and biogeographic patterns in representatives of the genus Calopteryx (Insecta: Odonata) of the West Mediterranean and adjacent West…
TLDR
Cretan populations are the only splendens-like taxa in addition to C. caprai that deserve subspecies status, and a monophyletic origin of all West Mediterranean and West European species emerged.
Effects of Grazing by the Free-Living Soil Amoebae Acanthamoeba castellanii, Acanthamoeba polyphaga, and Hartmannella vermiformis on Various Bacteria
TLDR
Growth of amoebae and ammonium production increased in the order A. polyphaga, A. castellanii, and H. vermiformis, and distinct differences in net ammoniumProduction were detected and were correlated to the amoEBal growth yield.
Phylogenetic analysis of anostracans (Branchiopoda: Anostraca) inferred from nuclear 18S ribosomal DNA (18S rDNA) sequences.
Phylogeography of an estuarine mysid, Neomysis integer (Crustacea, Mysida), along the north‐east Atlantic coasts
TLDR
The latitudinal trends in genetic diversity and the distribution of genetic variation were examined in order to elucidate the imprints of the Pleistocene glaciations.
Sequence variations in small-subunit ribosomal RNAs of Hartmannella vermiformis and their phylogenetic implications.
TLDR
Parsimony, distance, and bootstrap analyses used to examine phylogenetic relationships between the srDNA sequences of H. vermiformis and other eukaryotes indicated that Hartmannella sequences were most closely related to those of Acanthamoeba and the alga Cryptomonas.
Phylogenetic relationships and divergence time estimate of African anguilliform catfish (Siluriformes: Clariidae) inferred from ribosomal gene and spacer sequences.
STREPTOCEPHALUS SIRINDHORNAE, NEW SPECIES OF FRESHWATER FAIRY SHRIMP (ANOSTRACA) FROM THAILAND
TLDR
Streptocephalus sirindhornae, new species, the first freshwater anostracan from Thailand, is widespread in the northeast of the country, and sequence analysis of its SSU rDNA gene reveals that its closest relative is in fact the Indian species-pair S. dichotomus-S.
Phylogeny of the African representatives of the catfish family Clariidae (Teleostei, Siluriformes) based on a combined analysis: independent evolution towards anguilliformity
TLDR
It is shown that the phylogenetic analysis of morphological data mainly gives a reflection of the cranial evolution in the Clariidae despite the use of 18 post-cranial characters, which suggests the derived nature of body elongation.
Two taxa within the North African Lestes virens complex (Zygoptera: Lestidae)
A study of Lestes "virens" in Algeria, based on SEM, size analysis, and molecular analysis of nuclear ribosomal DNA genes (18S, 5.8S) and spacers (ITS1 and 2), reveals the presence of two taxa that…
Phylogenetic Position of Psalteriomonas lanterna Deduced from the SSU rDNA Sequence
TLDR
Primary sequence data and the secondary structure of the SSU rDNA gene showed that P. lanterna groups as a sister taxon to the Vahlkampfiidae but probably diverged from them quite early.
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