Abstract
Dorvilleids were collected from hydrothermal vents on the Southwest Indian Ridge by manned submersible Jiaolong. These represent a new species of Ophryotrocha that is here described as Ophryotrocha jiaolongi sp. n. This is the first dorvilleid described from vents on the Southwest Indian Ridge. It most closely resembles another vent species, Ophryotrocha akessoni Blake, 1985 from the Galapagos Rift, but can be distinguished by its antennae, palps, jaw structure. The new species has particularly distinctive mandibles, which allow it to be easily identified.
Highlights
Ophryotrocha Claparède & Mecznikow, 1869 is a diverse dorvilleid genus with more than 70 species described to date
Jaws and chaetae were analyzed by scanning electron microscope (SEM)
Jaws from both holotype and paratype were obtained after digesting anterior decapitated ends with a proteinase K solution at room temperature
Summary
Ophryotrocha Claparède & Mecznikow, 1869 is a diverse dorvilleid genus with more than 70 species described to date. Jaws and chaetae were analyzed by scanning electron microscope (SEM). DNA extraction was done with DNeasy blood and tissue kit (Qiagen, CA, USA) following the protocol supplied by the manufacturer. Alignments of the three genes (CO1, 16S, H3) were performed using the program MAFFT (Katoh and Standley 2013) with all DNA data of dorvilleids available from Genbank.
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