Anheteromeyenia Schröder, 1927

Calheira, Ludimila & Pinheiro, Ulisses, 2018, A new species of Anheteromeyenia (Porifera, Demospongiae) with an emended diagnosis of the genus, Zootaxa 4378 (1), pp. 129-136 : 131

Genus Anheteromeyenia Schröder, 1927

Heteromeyenia (Anheteromeyenia) : Schröder 1927: 108 (part).

Anheteromeyenia: De Laubenfels 1936: 36 (part), Penney & Racek 1968:114 (part), Ricciardi & Reiswig 1993: 667 (part), Volkmer-Ribeiro 1996: 32, Volkmer-Ribeiro 2007: 118, Manconi & Pronzato 2002: 929 (part), 2005: 3235, Buso et al. 2012: 148.

Radiospongilla: Bonetto & Ezcurra de Drago 1970: 39 (part), De Rosa-Barbosa 1984: 130 (part)

Emended diagnosis. Encrusting Spongillidae . Ectosomal skeleton thick. Choanosomal skeleton formed by an irregular network of megascleres with unispicular tracts. Spongin sparse. Megascleres in one category (acanthoxeas or smooth oxeas) or two categories (alfa megascleres, acanthoxeas or smooth oxeas; and beta megascleres, acanthoxeas and acanthostrongyles). Microscleres absent. Gemmular theca tri-layered. Gemmuloscleres pseudobirotules, acanthoxeas, and acantostrongyles, radially embedded in the gemmular theca (modified from Buso et al. 2012).

Remarks. The genus was redefined by Volkmer-Ribeiro (1996) who included species with acanthoxeas as megascleres, and irregularly birotulated gemmuloscleres in two categories of length. Manconi & Pronzato (2002) included acanthoxea megascleres and pseudobirotule gemmuloscleres in the diagnosis of Anheteromeyenia . Buso et al. (2012) redescribed the genus and stated that two categories of megascleres may be present: alfa megascleres, spiny or smooth amphioxeas, and beta megascleres, spiny amphioxeas to amphistrongyles, and irregularly birotulated gemmuloscleres. Here, we emended the diagnosis of Anheteromeyenia to include smooth oxeas as megascleres (found in the new species described here) and gemmuloscleres, acanthoxeas and acanthostrongyles, that Volkmer-Ribeiro (1996) and Buso et al. (2012) named irregularly birotulated. The nomenclature of the gemmulosclere was defined following the classification proposed by Manconi & Pronzato (2002). In addition, we consider that the oxeas and strongyles described for Anheteromeyenia by Buso et al. (2012) are amphioxeas and amphistrongyles, respectively. The underlined words correspond to the modifications made in the diagnosis.

Type species: Spongilla argyrosperma Potts, 1880: 357 (by subsequent designation; Penney & Racek 1968).