title: Branchiosyllis, Haplosyllis, Opisthosyllis and Trypanosyllis (Annelida: Syllidae) from Brazil, with the Description of Two New Species.
abstract: Brazilian specimens of Branchiosyllis cf. exilis, B. tamandarensis sp. n., Haplosyllis lattigae sp. n., H. loboi, Opisthosyllis brunnea and O. viridis are described and illustrated herein, from recently collected material; also, the distributions of Haplosyllis amphimedonicola and H. rosenalessoae are expanded to other localities in the states of Paraíba and Pernambuco. Branchiosyllis tamandarensis sp. n. was found associated with sponges and is characterized by having a flattened, ribbon-like body, with longitudinal line of mid-dorsal papillae, peristomium dorsally inconspicuous, branchiae with up to six lobes, branchiae and ungulae on all parapodia, and falcigers absent. Haplosyllis lattigae sp. n. is characterized by having two kinds of chaetae with different sizes and shapes per parapodium, papillate dorsum from midbody, and midbody dorsal cirri alternating in length. Additionally, we provide keys to the Brazilian species of Branchiosyllis, Haplosyllis and Opisthosyllis, comparative tables of the new species described herein and selected similar congeners, and the first record for Trypanosyllis zebra in the states of Espírito Santo and Paraíba.
authors.affiliation: Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil.
authors.forename: Karla
authors.initials: K
authors.lastname: Paresque
authors.affiliation: Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil.
authors.forename: Marcelo Veronesi
authors.initials: MV
authors.lastname: Fukuda
authors.affiliation: Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil.
authors.forename: João Miguel de Matos
authors.initials: JM
authors.lastname: Nogueira
mesh_terms: D000818:Animals; D000845:Annelida / Q000033:anatomy & histology* / Q000145:classification* / Q000502:physiology*; D049628:Body Size; D001938:Brazil; D008855:Microscopy, Electron, Scanning; D009792:Oceans and Seas; D009929:Organ Size; D013045:Species Specificity; D009626:Terminology as Topic