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Issue: Vol. 5523 No. 4: 17 Oct. 2024
Type: Article
Published: 2024-10-17
DOI: 10.11646/zootaxa.5523.4.1
Page range: 401-422
Abstract views: 79
PDF downloaded: 1

Taxonomic and geographic novelties of Acarnus (Porifera: Demospongiae) from the Brazilian coast, with description of two new species

Programa de Pós-Graduação em Biologia Animal; Instituto de Biociências; Universidade Federal do Rio Grande do Sul; Avenida Bento Gonçalves; 9500; Bloco IV; Prédio 43433; Sala 214; CEP 91501-970; Porto Alegre; Rio Grande do Sul; Brasil
Universidade Federal do Cariri; Instituto de Formação de Educadores; Rua Olegário Emídio de Araújo; s/n; CEP 63260-000; Brejo Santo; Ceará; Brasil; Programa de Pós-Graduação em Diversidade Biológica e Recursos Naturais (PPGDR); Universidade Regional do Cariri (URCA); Centro de Biológicas e da Saúde (CCBS); Pimenta; CEP 63105-000; Crato; Ceará; Brasil
Programa de Pós-Graduação em Biologia Animal; Instituto de Biociências; Universidade Federal do Rio Grande do Sul; Avenida Bento Gonçalves; 9500; Bloco IV; Prédio 43433; Sala 214; CEP 91501-970; Porto Alegre; Rio Grande do Sul; Brasil; Centro de Estudos Costeiros; Limnológicos e Marinhos (CECLIMAR); Campus Litoral Norte; Universidade Federal do Rio Grande do Sul; Avenida Tramandaí; 976; CEP 95.625-000; Imbé; Rio Grande do Sul; Brasil
Porifera Poecilosclerida Acarnidae Camamu Bay Bahia State taxonomy

Abstract

Acarnus are poecilosclerid sponges characterized mainly by cladotylote megascleres. Five species are known on the Brazilian coast: Acarnus innominatus Gray 1867, Acarnus radovani (Boury-Esnault, 1973), Acarnus toxeata Boury-Esnault, 1973, Acarnus nicoleae van Soest, Hooper & Hiemstra, 1991 and Acarnus microxeatus Nascimento & Pinheiro, 2023. This study describes two new Brazilian species, Acarnus hooperi sp. nov. and Acarnus tupiniquim sp. nov., from Rio de Janeiro and Bahia States, respectively, whose diagnosis is the presence of tylostyles, a character formally recorded for the first time in the family Acarnidae and the genus Acarnus. We also describe two of the previously known species, A. innominatus and A. toxeata. Additionally, an identification key for the Acarnus species from the Tropical Western Atlantic is proposed.

 

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