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Unidentified Facelinid sp. #8
Unidentified Facelinid #8
Maximum size:  about 10 mm.

Identification:  The body of this species is translucent gray-orange. The top of its head is opaque white and there are a series of diamond-shaped gray-white patches on the mid-line of the notum. The sides of its body have regularly spaced, opaque-white patches and the cephalic tentacles have an opaque-white sub-medial band. There are six widely spaced clusters of short, cream cerata that have dark spots near their tips. The rhinophores are irregularly annulate and have brown tips.

Natural history:  Unidentified facelinid sp. #8 is known from a single animal found crawling, by day, on a vertical rock surface at 17 m (57 ft). It was at an exposed to highly exposed site.

Distribution:  Kauai: probably widely distributed in the Pacific.

Taxonomic notes:  The Hawaiian animal is similar to animals found in the Marshall Islands by Scott Johnson. Based on its general form and annulate rhinophores, it's probably in Favorinus or Cratena. It was first recorded in Hawaii from about 274 meters off shore of the southernmost tip of Kauai by Eric Shewchuk on Aug. 21, 2020. It's somewhat similar to "Facelinid sp. 3" in Gosliner, et. al. (2018). However, that species (as illustrated) has longer cerata and lacks the opaque white patches below the cerata.

Photo:  Eric Shewchuk: about 10 mm: about 274 meters off shore of the southernmost tip of Kauai, Aug. 21, 2020.

Observations and comments:

Note 1:  ( )
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