03011nas a2200349   4500008004100000020002000041245025700061210006900318260001200387300001200399490000700411520170800418653002602126653001902152653002702171653002202198653004802220653002302268653001502291653001702306653003502323653002902358653002502387653003002412653001902442653002202461653001202483100001502495700001902510700001502529856011702544       2011                        eng d  a15252647 (ISSN)00aDescription of Heterosentis holospinus n. sp. (Acanthocephala: Arhythmacanthidae) from the striped eel catfish, Plotosus lineatus, in Halong Bay, Vietnam, with a key to species of Heterosentis and reconsideration of the subfamilies of Arhythmacanthidae0 aDescription of Heterosentis holospinus n sp Acanthocephala Arhyt  c2011///  a29 - 380 v783 aHeterosentis holospinus n. sp. is 1 of 11 species of acanthocephalans collected from 13 species of marine fish in Halong Bay, Vietnam, in 2008 and 2009. The striped eel catfish, Plotosus lineatus (Thunberg, 1787), harbored a large number of individuals of the new species. Species of Heterosentis Van Cleave, 1931, are characterized by having 2 or 3 types of proboscis hooks in 10-14 rows, and trunk spines. Of the 15 known species of Heterosentis (including the new species), H. holospinus is distinguished by having a trunk entirely covered with spines and an anterior trunk cone free of spines. Only Heterosentis overstreeti Schmidt and Paperna, 1978, has a trunk that is also entirely covered with spines; it, however, differs from H. holospinus by lacking an anterior trunk cone but having 4 giant nucleated muscle cells in the anterior trunk, and 2 basal spines per proboscis hook row. Heterosentis holospinus has no such muscle cells, and the proboscis contains 3-4 spines per row. Only 2 other species of Heterosentis have anterior trunk cones: Heterosentis septacanthus (Sita, 1949) Golvan 1969, which has a cylindrical trunk and proboscis, only anterior trunk spines, and smaller proboscis hooks, and Heterosentis plotosi Yamaguti, 1935, which has 4 nucleated giant muscle cells, only anterior trunk spines, and 4-5 spines per proboscis hook row. The characteristics of H. holospinus are described and compared with those of the other 14 species of Heterosentis. A key to the 15 species of the genus is included. The justification for the retention of the 3 subfamilies of Arhythmacanthidae no longer applies, and their deletion is proposed. © 2011 The Helminthological Society of Washington.10a15 species comparison10aAcanthocephala10aAcanthocephala (worms)10aArhythmacanthidae10adeletion of sufamilies of Arhythmacanthidae10aentire trunk spiny10aHalong Bay10aHeterosentis10aHeterosentis holospinus n. sp.10aHeterosentis overstreeti10aHeterosentis plotosi10aHeterosentis septacanthus10akey to species10aPlotosus lineatus10aVietnam1 aAmin, O.M.1 aHeckmann, R.A.1 aVan Ha, N.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-79551657475&partnerID=40&md5=b4f24d325c36d9566e28c12a3296e5aa02418nas a2200337   4500008004100000020002000041245015300061210006900214260001200283300001200295490000700307520127900314653001901593653002701612653001701639653002501656653002001681653001501701653001901716653001601735653001601751653002201767653002001789653004901809653004401858653001201902100001501914700001901929700001501948856011701963       2011                        eng d  a12302821 (ISSN)00aDescription of two new species of Rhadinorhynchus (Acanthocephala, Rhadinorhynchidae) from marine fish in Halong Bay, Vietnam, with a key to species0 aDescription of two new species of Rhadinorhynchus Acanthocephala  c2011///  a67 - 770 v563 aTwo rhadinorhynchid species of acanthocephalans, Rhadinorhynchus dorsoventrospinosus sp. nov. and Rhadinorhynchus laterospinosus sp. nov. are described from the redtail scad, Decapterus kurroides Bleeker, and the trigger fish Balistes sp., respectively. The hosts were collected off Cat Ba Island, Halong Bay, Gulf of Tonkin, Vietnam in May, 2009. This brings the total number of species of Rhadinorhynchus Lühe, 1911 to 38. Specimens of the first species are characterized by having 11-12 proboscis hook rows with 30-31 hooks each, large dorsal and ventral spines in the posterior field of trunk spines, large eggs (100 × 20), and subterminal gonopore in both males and females. It is further characterized by many prominent fragmented nuclei in the body wall. The 1 female of the second species has 18 proboscis hook rows with 24 hooks each, smaller eggs (62 × 17), lateral trunk spines connecting those in the anterior and the posterior fields, and subterminal female gonopore. Notes on the genus Rhadinorhynchus, lists of the invalid and valid species, and a key to species are provided. Raorhynchus Tripathi, 1959 is proposed to be a junior synonym of Rhadinorhynchus pending a revision of the species of Raorhynchus. © 2011 Versita Warsaw and Springer-Verlag Wien.10aAcanthocephala10aAcanthocephala (worms)10aBalistes sp.10aDecapterus kurroides10aDecapterus tabl10aHalong Bay10akey to species10amarine fish10aRaorhynchus10aRhadinorhynchidae10aRhadinorhynchus10aRhadinorhynchus dorsoventrospinosus sp. nov.10aRhadinorhynchus laterospinosus sp. nov.10aVietnam1 aAmin, O.M.1 aHeckmann, R.A.1 aVan Ha, N.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-79951752580&partnerID=40&md5=36d4a22fcd31f119b6d831ab968b72fb