A new species of Baikal endemic sponges (Porifera, Demospongiae, Spongillida, Lubomirskiidae)

Collection: Pensoft Publishers

Keywords: ITS · Topics: Marine Sponges and Natural Products, Myxozoan Parasites in Aquatic Species, Venomous Animal Envenomation and Studies

This paper reports on a new species of the Baikal endemic sponge (fam. Lubomirskiidae) Swartschewskia khanaevi sp. nov. The description of this species is based on morphological and molecular data (ITS and mitochondrial IGRs). Morphologically, S. khanaevi sp. nov. differs from S. papyracea by loose tracts arranged in an irregular network as well as the presence on strongyles of compound spines looking like tubercles densely ornamented with simple spines. Moreover, specimens of S. khanaevi sp. nov. show a peculiar structure of the aquiferous system at the body surface that may be an adaptive trait for environmental conditions. Phylogenetic analysis has revealed that S. khanaevi sp. nov. forms a well-supported (0.99) monophyletic clade with S. papyracea and is allocated as its sister taxa.

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