Bathyporania ascendens Mah & Foltz, 2014, n. sp.
Bathyporania ascendens n. sp. Figure 2 A–E Etymology. Species epithet ascendens (=Latin for “ascending”) refers to the in situ observation of the animal’s climb up the upper branches of a deep-sea coral, where it was collected (Fig. 2 E). Taxonomic comparison. The phylogenetic tree shown in Fig. 1,...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2014
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| Online Access: | https://zenodo.org/record/6133817 https://doi.org/10.5281/zenodo.6133817 |
| Summary: | Bathyporania ascendens n. sp. Figure 2 A–E Etymology. Species epithet ascendens (=Latin for “ascending”) refers to the in situ observation of the animal’s climb up the upper branches of a deep-sea coral, where it was collected (Fig. 2 E). Taxonomic comparison. The phylogenetic tree shown in Fig. 1, illustrates Bathyporania as sister taxon to “ Porania ” antarctica but the single individual sampled does not clarify monophyly of Bathyporania relative to “ Porania ” antarctica. Distinction of this taxon as a separate genus is based on several characters including the more densely arranged reticulate skeleton with more lobate abactinal plates, the polylobate marginal plates arranged horizontally (versus vertically in “ P.” antarctica), the absence of an actinolateral fringe of plates, the differnce in furrow spine morphology, actinal plate arrangements and differences in disk: arm ratio, including the outline of the arms. Adult size in the holotype of Bathyporania ascendens is also much smaller than those in “ Porania ” antarctica. Shared characters between the two genera include furrow spines which are arranged transversely, a disparately sized larger superomarginal and a smaller (<50 %) sized inferomarginal plate series, as well as flattened marginal plates. The presence of a reticulate skeleton suggests affinities with Clavaporania nov. gen., which otherwise appears different from Bathyporania. Figure 1 places Bathyporania as the sister taxon to “ Porania ” antarctica (see change below). Bathyporania displays superficial resemblance with two species, Poraniomorpha abyssicola and P. tumida, which we have placed within the genus Rhegaster below. Bathyporania differs in several respects from both Poraniomorpha abyssicola and P. t u m i d a, including the presence of a broadly reticulate abactinal skeleton, spinelet-tipped abactinal and marginal plates and marginal plates with a differing lobate shape than that of Rhegaster. Character similarities are interpreted as plesiomorphies, including single papular pores, ... |
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