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Sagaminopteron nigropunctatum  Carlson & Hoff, 1973

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Sagaminopteron nigropunctatum Carlson & Hoff, 1973 is translucent greyish with fine black specks and light grey to cream coloured pustules. The edges of the siphon are usually orange, and sometimes the tip of the siphon as well. There are two distinctive orange spots on the headshield, one at each anterior corner, and the flagellum is also often edged with orange. In different specimens varying numbers of other orange specks can be found.
On 28 September 2015 identified Dr. Richard C. Willan all above specimens as variants of S. nigropunctatum, all individuals have tiny black specs, that are diagnostic of this species."Other features (notably the white papillae in the individual...) are likely age-related."
I had no idea on the intraspecific variability, that is the reason why:
- the pictures #1, #2 #3, #4,and #5 were posted on 4 October 2010 on these websites as Sagaminopteron sp. A  Genus: Tokioka & Baba, 1964, because those specimens lack the two distinctive orange spots on the headshield,
on 12 February 2012 changed into Sagaminopteron sp. 01  Genus: Tokioka & Baba, 1964,
- the pictures #6, #7, and #8 were posted on 11 October 2010 on these websites as Sagaminopteron sp. B  Genus: Tokioka & Baba, 1964, I thought this species is distinct because of the long flagellum, the lack of spicules, and also the lacking two distinctive orange spots on the headshield,
on 15 February 2012 changed into Sagaminopteron sp. 02  Genus: Tokioka & Baba, 1964,
- the picture #9 was posted on 30 July 2015 on these websites as Sagaminopteron sp. 05  Genus: Tokioka & Baba, 1964, I thought this species is distinct because of the long siphon, and the orange edged parapodia, and also the lacking two distinctive orange spots on the headshield.
There are more pictures of Sagaminopteron nigropunctatum from the type localty Guam at the website http://guamreeflife.com/, from the Marshall Islands, from Japan, and also from Japan, and from La Réunion. Even the specimens from Guam lack the orange spots on the headshield.
More information on Sagaminopteron nigropunctatum are on Bill Rudman's Sea Slug Forum!
How to cite:
Köhler, E. (2016), published 6 July 2016, Sagaminopteron nigropunctatum  Carlson & Hoff, 1973
available from http://www.Philippine-Sea-Slugs.com/Cephalaspidea/Sagaminopteron_nigropunctatum.htm