Nascimento, E.; Pinheiro, U. (2023). A new species of Acarnus Gray, 1867 (Porifera, Demospongiae, Acarnidae) from NE Brazil. Zootaxa. 5293 (3): 521-540.

451322

10.11646/zootaxa.5293.3.5 [view]

Nascimento, E.; Pinheiro, U.

2023

5293 (3): 521-540

Publication

http://zoobank.org/urn:lsid:zoobank.org:pub:7A0F8C73-B94D-4FAE-A0D9-FFC3D86104E8

Available for editors   [request]

The synapomorphic character of the genus Acarnus Gray, 1867 is the presence of the cladotylote spicule. Acarnus has 27 valid species worldwide, including five species reported from the Brazilian coast: A. innominatus Gray, 1867, A. nicoleae van Soest, Hooper & Hiemstra, 1991, A. souriei (Lévi, 1952), A. radovani (Boury-Esnault, 1973) and A. toxeata Boury-Esnault, 1973. Here we will describe A. microxeatus sp. nov., whose diagnosis is the presence of smooth microxeas and acanthoxeas, new characters for the genus. We also provide a complete characterization of the skeletal architecture and spicule morphology of A. toxeata, with scanning electron microscopy image (SEM) of the spicule set.

South West Atlantic ( =only warm temperate; cold temperate see *SUB)

Systematics, Taxonomy

Porifera

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