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Mariaglaja tsurugensis (Baba & Abe 1959) [Chelidonura]

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Mariaglaja tsurugensis is highly variable, the general body colour is a glossy purplish black. "The whole upper surface except the sole is covered with a varying number of yellow or golden-yellow spots, very irregular in size and in arrangement." from the original paper by Baba & Abe (1959)
This species was posted on 23 March 2011 at these websites as Chelidonura tsurugensis  Baba & Abe 1959, Zamora-Silva & Malaquias (2017) synonymized it formally with the younger Chelidonura sandrana  Rudman, 1973 and moved it into the new genus Mariaglaja  Zamora-Silva & Malaquias, 2017.
The solid black specimens were posted on 5 January 2004 ff at these websites as Chelidonura sp. A  Genus: A. Adams, 1850,
the black specimens with a broad white band on the head were posted on 5 January 2004 ff at these websites as Chelidonura sp. B  Genus: A. Adams, 1850,
the black specimens with yellow and white spots were posted on 15 January 2012 at these websites as Chelidonura sp. 03  Genus: A. Adams, 1850,
the specimens #2, #3, and #4, were posted on 21 April 2003 ff at these websites as Chelidonura sandrana  Rudman, 1973.
I changed them all on 9 May 2018 into Mariaglaja tsurugensis (Baba & Abe 1959) [Chelidonura].
Very similar is the solid black Tubulophilinopsis sp. 01  Genus: Zamora-Silva & Malaquias, 2017, which differs by the 'bubble head', and by shorter 'tails'.
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 Mariaglaja tsurugensis as Chelidonura tsurugensis were on Robert F. Bolland's OKINAWA SLUG SITE! This website is down, access now only per Web Archive https://web.archive.org/web/20081121083639/http://www.rfbolland.com/okislugs/cheltsur.html
How to cite:
Köhler, E. (2021), published 21 March 2021, Mariaglaja tsurugensis (Baba & Abe 1959)
available from https://www.Philippine-Sea-Slugs.com/Cephalaspidea/Mariaglaja_tsurugensis.htm

 
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