Glyceridae (Annelida: Polychaeta) from Guam, Mariana Islands with description of a new species of Glycera Savigny in Lamarck, 1818

Abstract

Glycera juliae sp. nov., is described from shallow water sediments within Apra Harbor, Guam, Mariana Islands. This spe-cies is characterized by the presence of ailerons with rounded triangular base; proboscideal papillae of type 1 mainly dig-itiform with straight, median, longitudinal ridge and type 2 shorter and broader, oval to globular, without ridges; twoslender triangular to digitiform prechaetal lobes, notopodial lobe slightly shorter than neuropodial lobe, two shortpostchaetal lobes, rounded anteriorly with posterior notopodial lobe becoming sub-triangular and longer than roundedneuropodial lobe; branchiae present, retractile, simple digitiform attached medially on anterior side of parapodia and adark brown pigmentation forming transverse bands on prostomium and body segments. It is most similar to Glycera nico-barica and G. macintoshi by the shape of parapodial structures but also shares similarities with Glycera sphyrabrancha,G. branchiopoda, G. guatemalensis, G. semibranchiopoda and G. southeastatlantica by the shape and types of proboscidialpapillae, differing on the shape of the ailerons, parapodial lobes and presence of branchiae. The occurrence of Glycera tesselata is confirmed for Guam and specimens are described and illustrated with SEM photographs.