02005nas a2200241   4500008004100000245015200041210006900193260005900262300001000321490000800331520113200339653000901471653001201480653001301492653001601505653001701521653001501538653001901553100001601572700001601588700002201604856013701626       2004                        eng d00aThe musculature of horsehair worm larvae (Gordius aquaticus, Paragordius varius, Nematomorpha): F-actin staining and reconstruction by cLSM and TEM0 amusculature of horsehair worm larvae Gordius aquaticus Paragordi  a175 FIFTH AVE, NEW YORK, NY 10010 USAbSPRINGER-VERLAG  a45-540 v1233 aThe musculature of larvae of Gordius aquaticus was investigated by laser-scanning microscopy and compared to transmission electron microscopic data for the larva of Paragordius varius. In the anterior portion of the body, the preseptum, four different muscle groups can be distinguished: (1) 12 anterior parietal muscles in the body wall, (2) six oblique muscles that function as retractors of the introvert, (3) six proboscideal muscles, which function as retractors for the proboscis, and (4) six muscles associated with spines of the outermost of the three rings of spines. The posterior portion of the body, the postseptum, possesses four pairs of longitudinal muscle strands in G. aquaticus, the postseptal parietal muscles, that are located dorsolaterally and ventrolaterally. These are not clearly visible in P. varius, where instead three pairs of parietal muscles are present. Additional small muscles are associated with the terminal spines and with the duct running from the pseudointestine to the body wall. All fibers show a cross-striated pattern although this striation is less obvious at the ends of the fibers.10acLSM10aF-actin10aGordiida10amusculature10aNematomorpha10aphalloidin10aultrastructure1 aMuller, MCM1 aJochmann, R1 aSchmidt-Rhaesa, A  uhttps://nematoda.myspecies.info/content/musculature-horsehair-worm-larvae-gordius-aquaticus-paragordius-varius-nematomorpha-f-actin-01562nas a2200205   4500008004100000245008700041210006900128260007400197300001200271490000800283520084700291653001301138653001401151653001301165653001401178100001601192700002201208700000501230856012101235       2002                        eng d00aSystematic relationships of Nematomorpha based on molecular and morphological data0 aSystematic relationships of Nematomorpha based on molecular and   a810 EAST 10TH ST, LAWRENCE, KS 66044-8897 USAbAMER MICROSCOPICAL SOC  a357-3640 v1213 aWe sequenced the 18S rRNA gene from 11 nematomorph species from 9 genera and derived hypotheses concerning the sister group of Nematomorpha and relationships within this taxon. The molecular and morphological data are consistent with the monophyly of Nematomorpha, a sister-group relationship between Nematomorpha and Nematoda, and a sister-group relationship between the marine genus Nectonema and all of the freshwater taxa, Gordiida. Hypotheses of relationships within Gordiida support the traditional taxa Gordiidae, Chordodidae, and Chordodinae but reject Paracbordodinae and Spinochordodidae. The molecular results differ from those of previous morphological studies by suggesting a reduction of the two tail lobes at the posterior end of males in Chordodinae, monophyly of the genus Paragordionus, and paraphyly of the genus Chordodes.10aGordiida10aNectonema10aNematoda10aphylogeny1 aBleidorn, C1 aSchmidt-Rhaesa, A1 a  uhttps://nematoda.myspecies.info/content/systematic-relationships-nematomorpha-based-molecular-and-morphological-data