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Tubulophilinopsis pilsbryi (Eliot, 1900) [Doridium]

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Tubulophilinopsis pilsbryi can be easily identified by its colour pattern.The background colour is translucent white/tan with a pattern of black/brown reticulate lines. In some specimens the lines are relatively thin. Let me quote Bill Rudman: "The colour pattern though is very variable and runs through to animals which could best be described as being black dorsally with white spots."
Gary Cobb's message at the SSF shows ten of the variants!
Pretty similar are Tubulophilinopsis reticulata which has blue markings on the inside edge of the anterior part of the parapodia and along the outer edge of the parapodia and Tubulophilinopsis cf. reticulata which has very little blue markings at the postorior end of the parapodia. Its body colour is whitish with a brown reticulate pattern.
Species of Tubulophilinopsis are usually found burrowing through sand or mud.
This shot shows a pretty dark variant of Tubulophilinopsis pilsbryi, as mentioned by Bill Rudman. It was misidentified and posted on 9 July 2003 at these
websites as Philinopsis sp. A  Genus: Pease, 1860, changed on 19 November 2011 into Philinopsis sp. 01  Genus: Pease, 1860, identified and changed
on 19 January 2018.
This species was posted on 9 July 2003 at these websites as Philinopsis pilsbryi (Eliot, 1900) [Doridium], Zamora-Silva & Malaquias (2017) moved it
into the new genus Tubulophilinopsis  Zamora-Silva & Malaquias, 2017.
Reference:
Andrea Zamora-Silva and Manuel António E. Malaquias Molecular phylogeny of the Aglajidae head-shield sea slugs (Heterobranchia: Cephalaspidea): new evolutionary lineages revealed and proposal of a new classification
Zoological Journal of the Linnean Society, 2017, XX, 1-51
available online at https://academic.oup.com/zoolinnean/advance-article-abstract/doi/10.1093/zoolinnean/zlx064/4584517
More information on Tubulophilinopsis pilsbryi as Philinopsis pilsbryi are on Bill Rudman's Sea Slug Forum!
How to cite:
Köhler, E. (2018), published 19 January 2018, Tubulophilinopsis pilsbryi (Eliot, 1900)
available from https://www.Philippine-Sea-Slugs.com/Cephalaspidea/Tubulophilinopsis_pilsbryi.htm