00793nas a2200133   4500008004100000245014700041210006900188300001000257490000800267520029900275100002000574700002200594856004300616       2013                        eng d00aA new species of Nicon Kinberg, 1866 (Polychaeta, Nereididae) from Ecuador, Eastern Pacific, with a key to all known species of the genus0 anew species of Nicon Kinberg 1866 Polychaeta Nereididae from Ecu  a67-760 v2693 a<p>A new species of Nicon Kinberg, 1866 from the east Pacific coast of Ecuador is described. The new species is characterized by a long, thin dorsal ligule on median and posterior parapodia and infracicular sesquigomph falcigers in the neuropodia. A key to all species of Nicon is provided.</p>1 ade León, Jesus1 aTrovant, Berenice  uhttps://annelida.myspecies.info/node/301689nas a2200133   4500008004100000245013400041210006900175300000900244490000800253520121100261100002001472700002001492856004301512       2013                        eng d00aA new species of Perinereis (Polychaeta, Nereididae) from Florida, USA, with a key to all Perinereis from the American continent0 anew species of Perinereis Polychaeta Nereididae from Florida USA  a1-110 v3123 a<p>Specimens belonging to a new species of Perinereis Kinberg, 1865 were collected from natural oyster reefs in an estuarine environment on Florida&rsquo;s southwest coast. The genus Perinereis includes more than 60 species, of which, P. aibuhitensis (Grube, 1878), P. brevicirrata (Treadwell, 1920), P. camiguinoides (Augener, 1922), P. jascooki Gibbs, 1972, P. kuwaitensis Mohammad, 1970, P. singaporiensis (Grube, 1878), P. vancaurica (Ehlers, 1868) and the new species have two short bars on Area VI and notopodial dorsal ligules that are not greatly expanded. The most geographically close species is P. brevicirrata. The new species can be distinguished from P. brevicirrata by the absence of a notopodial prechaetal lobe, Area V with 3 cones in a triangle, and Area VII-VIII with two well-defined rows of 33 paragnaths, the basal rowlonger paragnaths in relation to the distal ones. The new species resembles P. singaporiensis based on the absence of notopodial prechaetal lobe; however, the two species differ in some morphological characteristics such as tentacular cirri length, shape of dorsal notopodial ligules, and falciger blades. A key to all American species of Perinereis is included.</p>1 ade León, Jesus1 aGoethel, Carrie  uhttps://annelida.myspecies.info/node/4