Drulia cristinae, new species of sponge from the rio Xingu, Amazonas Basin, Brazil (Porifera: Demospongiae: Poecilosclerida: Metaniidae Volkmer-Ribeiro, 1986)

IF 0.5 4区环境科学与生态学 Q4 BIODIVERSITY CONSERVATION

Proceedings of the Academy of Natural Sciences of Philadelphia Pub Date : 2017-07-07 DOI:10.1635/053.166.0101

C. Volkmer-Ribeiro, I. E. D. Drago, V. S. Machado, M. Sabaj

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引用次数: 2

Abstract

ABSTRACT. A recent survey of the aquatic fauna in the rio Xingu, Pará State, Brazil, revealed a new species of Drulia Gray 1867, an extraordinary genus of freshwater sponge endemic to South America. Drulia cristinae n. sp. is distinguished in part by having gemmoscleres typically with elliptical outline and outer face with small, central crest or irregular bulge (exceptionally nude), oscules set atop conical projections of skeleton, and microscleres minute, wholly nanospined amphioxea. A taxonomic key is presented for the six species now composing the restored and redefined genus Drulia: D. brownii, D. cristata, D. uruguayensis, D. conifera, D. ctenosclera and D. cristinae n. sp. Furthermore, the monotypic South American genus Houssayella is retained as valid in Spongillidae on the basis of sharing gemmoscleres with true birotulate pattern (i.e., symmetrical disks separated by short or long, spiny or smooth shaft).

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Drulia cristinae，巴西亚马逊盆地rio Xingu海绵的新种（Porifera:Domospongiae:Poecilosclerida:Metanidae Volkmer Ribeiro，1986）

摘要最近对巴西帕尔州里约热内卢Xingu水生动物群的调查发现了一种新的Drulia Gray 1867，这是南美洲特有的一种非凡的淡水海绵属。朱丽鱼的特点之一是具有典型的椭圆形轮廓和外表面有小的中央嵴或不规则凸起(异常裸露)的双孔，位于骨骼的圆锥形突起上的双孔，以及微小的、完全纳米棘的文文类微孔。本文提出了由恢复和重新定义的海绵属组成的6个物种的分类关键:D. brownii, D. cristata, D. uruguayensis, D. conifera, D. ctenosclera和D. cristinae n. sp。此外，单型的南美属Houssayella在海绵科中被保留为有效的，因为它们具有真正的双轮状模式(即由短或长，带刺或光滑的轴分开的对称盘)。

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Proceedings of the Academy of Natural Sciences of Philadelphia 生物多样性保护-生物多样性保护

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期刊介绍： The Proceedings (ISSN 0097-3157) has been published continuously since 1841. Many volumes are still available in their original printings. Early volumes are unbound, constituting two or three issues per year. Quantities of some volumes may be limited. Early volumes may have slightly soiled cover sheets, but the text blocks are perfect.