02229nas a2200181   4500008004100000020001400041245014200055210006900197260000800266300001400274490000700288520163400295100001901929700002101948700001401969700001801983856004602001       2009                        eng d  a0025-315400aA morphometric analysis of the genus <i>Terschellingia</i> (Nematoda: Linhomoeidae) with redefinition of the genus and key to the species0 amorphometric analysis of the genus iTerschellingiai Nematoda Lin  cSep  a1257-12670 v893 aThe cosmopolitan and often ecologically dominant genus Terschellingia (Nematoda: Linhomoeidae), with 38 nominal species, is taxonomically a problematic taxon. Its species show high morphological plasticity, possess few diagnostic characters and identification keys are lacking. A revision of the genus was carried out based on morphological and morphometric data from the literature and from observations of specimens collected in Cienfuegos Bay, Caribbean Sea, Cuba. The diagnosis of the genus Terschellingia is emended. Of the current 38 nominal species, 15 are considered as valid species based on morphological characters related to size and position Of amphidial fovea, presence/position of cephalic and cervical setae, presence/size/shape of pharyngeal bulb, shape of spicular apparatus and shape of tail. Tabular and pictorial keys were provided based on these characters. Three sympatric species: T. communis, T. gourbaultae and T. longicaudata were redescribed based on recently collected Cuban specimens. Each of them showed relatively large differences in body size in comparison with the respective type specimens, suggesting possible variation due to local environmental differences. The highest intraspecific variation pertains for the most widely spread cosmopolitan species T. longicaudata, suggesting that morphological plasticity enhanced adaptation to different environmental conditions. The notable taxonomic inflation within the genus (14 species inquirendae, 9 junior synonyms), probably also present in other highly specious genera of marine nematodes, can lead to an overestimation of the alpha-diversity.1 aArmenteros, M.1 aRuiz-Abierno, A.1 aVincx, M.1 aDecraemer, W.  uhttps://nematodes.myspecies.info/node/13001400nas a2200157   4500008004100000020001400041245007200055210006900127260000800196300001400204490000700218520093700225100001601162700001801178856004601196       2008                        eng d  a0025-315400aState of the art of the free-living marine Monhysteridae (Nematoda)0 aState of the art of the freeliving marine Monhysteridae Nematoda  cNov  a1371-13900 v883 aThe family Monhysteridae is characterized by 17 valid genera, seven of which are known to be free-living, inhabiting marine sediments. In total, 70 valid marine species are ascribed to these seven genera. Overall, the family is characterized by a confused taxonomic history with a large list of synonyms and species inquirendae. The taxonomic problem is not restricted to the old literature, but inconsistencies also appeared in recent studies. The aim of this study is to show the most important diagnostic characters to identify each genus and provide taxonomic tools for species identification. Dichotomous-keys and illustration-guides are attempted for the marine monhysterid species. For the family and each subfamily, tribe and marine genus a brief historical background, diagnosis and a list Of valid species is provided. Hereby, we propose to transfer eight species of the genus Thalassomonhystera to the genus Monhystrella.1 aFonseca, G.1 aDecraemer, W.  uhttps://nematodes.myspecies.info/node/137