• Welcome to TONMO, the premier cephalopod interest community, and birthplace of #WorldOctopusDay and #CephalopodAwarenessDays. Founded in 2000, we are a large community of experts, hobbyists and enthusiasts, some of whom come together when we host our biennial conference. To join in on the fun, sign up. You can also become a Supporter for just $50/year to remove all ads and enjoy other perks. Follow us on Twitter for more cephy goodness.

reflectin protein in ceph light organs

monty

TONMO Supporter
Staff member
Registered
Joined
Mar 8, 2004
Messages
4,884
Apparently, the "reflectin" protein found in squid reflectors is very different from similar non-ceph homologues. I just stumbled on this randomly when looking for something else, but it was interesting. This particular paper is rather photonics and protein heavy and cephalopod-light, but it references some other papers that describe it a bit more in vivo, including two by Hanlon et. al. This sounds like yet another case where a cephalopod genome project would be interesting, since the evolutionary history of this reflectin stuff seems likely died to coleoid development... I wonder if the same stuff is found in Vampyroteuthis and Spirula light organs... are there any octopuses that have light organs with reflectors? (edit: Nixon & Young describe a circumoral photophore in female Eledonella, but don't say if it has a reflector structure.) If so, they'd be interesting as well. And even more interesting if the protein also accounts for the iridescence of nautilus (or ammonite) shells!

further edits: does anyone have the Herring 1994 article on Vampyroteuthis from J. Zool? I can't find it online...
 

monty

TONMO Supporter
Staff member
Registered
Joined
Mar 8, 2004
Messages
4,884
other questions: do nautilus have leucophores or pigment cells? Are their white parts just because muscle cells are white in cephs? Are the red-brown parts in pigment "packets" like one might expect precursors to chromatophores?

also, despite many references saying that there are no bioluminescent cirroctopods, apparently there are
 

monty

TONMO Supporter
Staff member
Registered
Joined
Mar 8, 2004
Messages
4,884

Forum statistics

Threads
20,900
Messages
206,876
Members
8,476
Latest member
AndyR83

Monty Awards

TONMOCON IV (2011): Terri
TONMOCON V (2013): Jean
TONMOCON VI (2015): Taollan
TONMOCON VII (2018): ekocak


Top