NEW GENUS OF FRESHWATER SPONGES WITH A NEW SPECIES FROM AMAZONIAN WATERS (PORIFERA, DEMOSPONGIAE).
DOI:
https://doi.org/10.18316/91Abstract
Pottsiela n. gen. of continental sponges is defined to contain P. pesae, n. sp, besides P. spoliata n.comb., P. aspinosa, n. comb., P. inarmata n. comb., the last three transfered from genus Spongilla Lamarck 1816. The new genus has as distinctive characteristics gemmules allways deprived of pneumatic coat and gemmoscleres, but surrounded by an irregular arrangement of megascleres which may form a conspicuos cage. The distinction among the species is stablished upon the differing arrangements of the megascleres around or on the gemmules, the shape of the gemmules, as well as on the shape and size of megascleres and microscleres. The new genus has a distribution which encompasses the Paleartic, Neartic, and Neotropical Regions.
Key words: continental sponges, missing gemoscleres, Potsiella pesae n. gen. n. sp.
RESUMO
Novo gênero de esponjas de água doce com uma nova espécie de águas amazônicas (Porifera, Demospongiae). Pottsiela n. gen. de esponjas continentais é definido, contendo P. pesae, n. sp, alem de P. spoliata n.comb., P. aspinosa, n. comb., P. inarmata n. comb., , essas três transferidas do gênero Spongilla Lamarck 1816. Pottsiela n. gen. distingui-se por gêmulas sempre desprovidas de camada pneumática e gemoscleras, mas circundadas por um arranjo irregular de megascleras, que podem formar um conspícuo ninho em torno da gêmula, operando-se a distinção entre as espécies pelos diferentes arranjos das megascleras em torno ou sobre a gêmula, pela forma das gêmulas e pela forma e tamanho das megascleras e microscleras. O novo gênero tem distribuição nas Regiões Paleártica, Neártica, e Neotropical.
Palavras-chave: esponjas continentais, gemoscleras ausentes, Potsiella pesae n. gen. n. sp.
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