01598nas a2200133   4500008004100000245014700041210006900188300001200257490000700269520109800276653001601374100002201390856005201412       2006                        eng d00aMacrostomida (Platyhelminthes: Rhabditophora) from Argentina, with descriptions of two new species of Macrostomum and of stylet ultrastructure0 aMacrostomida Platyhelminthes Rhabditophora from Argentina with d  a853-8620 v233 aDescribes:
Macrostomum velastylum n. sp.
Macrostomum puntapiedrensis n. sp.
Mentions:
Macrostomum vejdovskyi
Macrostomum viride
Microstomum lineare
 In this work, two new species of the genus Macrostomum (M. velastylum n. sp. and M. puntapiedrensis n. sp.) are described from the littoral benthos of the Río de la Plata estuary, Argentina. This is the first description of members of the Macrostomidae from Argentina, and of a species documented from both limnic and brackish-water environments. Macrostomum velastylum differs from its congeners in the fine details of its stylet, which are described using a new technique for stylet isolation and observation (scanning electron microscope). This method provides new information on stylet structure relative to traditional whole-mount techniques. Macrostomum puntapiedrensis differs from others species of the M. orthostylum group in the length and morphology of the distal tip of the stylet. Further details are provided on additional macrostomids from Argentina, including potential conspecifics of M. vejdovskyi, M. viride, and M. lineare.10aMacrostomum1 aBrusa, Franscisco  uhttps://macrostomorpha.myspecies.info/node/1015