The Western Indian Ocean Province is reckoned for its rich marine diversity; however, sponges of the Mascarene Islands ecoregion are still poorly known. In La Réunion, only three species of class Calcarea have been registered. Hence, calcareous sponges were searched in seven sites representing various habitats of the Western coast of La Réunion, but found in only three of them. A total of 23 sponge samples was identified using morphological and molecular taxonomy. This sampling represents 11 species, all new records for the region, and seven of them are new to science: Ascandra mascarenica sp. nov., A. oceanusvitae sp. nov., Janusya indica gen. et sp. nov., Leucascus tenuispinae sp. nov., Lelapiella tertia sp. nov., Soleneiscus intermedius sp. nov. and Leucandra ornata sp. nov.; and a new genus, Janusya gen. nov.. Based on results from this and from previous studies, we propose the synonymization of the order Murrayonida with Clathrinida. A very low sampling effort has thus increased the number of calcareous sponge species from the Mascarenes Islands ecoregion by 69 % and from La Réunion by 367%.

中文翻译：

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印度洋留尼汪岛钙质海绵（Porifera: Calcarea）的综合分类学

西印度洋省以其丰富的海洋多样性而著称。然而，马斯卡林群岛生态区的海绵仍然鲜为人知。在留尼汪岛，仅登记了三种 Calcarea 类。因此，在代表留尼汪岛西海岸不同栖息地的七个地点进行了钙质海绵搜索，但仅在其中三个地点发现。使用形态学和分子分类学共鉴定了 23 个海绵样品。该样本代表 11 个物种，均为该地区的所有新记录，其中 7 个是科学新物种：Ascandra mascarenica sp。十一月，A. oceanusvitae sp。十一月，Janusya indica gen。等人。十一月，Leucascus tenuispinae sp。十一月，Lelapiella tertia sp。十一月，Soleneiscus intermedius sp。十一月 和 Leucandra ornata sp。十一月; 和一个新属，Janusya gen。十一月.. 基于此结果和先前研究的结果，我们建议将 Murrayonida 目与 Clathrinida 同义化。因此，非常低的采样工作使马斯卡伦群岛生态区的钙质海绵物种数量增加了 69%，留尼汪岛增加了 367%。