US 2018 Marine Worm : Bioluminescent Life 50c. Scott. 5272
Series: Bioluminescent Life
Stamp details: Marine Worm
Issued date: 22-02-2018 (dd/mm/yyyy)
Face value: 50c.
(FOREVER º - No Face Value)
Emission: Commemorative
Format: PSA pane of 20
First Day City: Fort Pierce, Florida
Catalogue No:-
Scott (USA): 5272
Michel (Germany): 5473
Yvert et Tellier (France): 5092
Dimensions (height x width):
24.8mm x 39.6mm
Designers: Edith Widder (photographer)
Printer: Banknote Corporation of America
Printing Method: Offset
Stamp Colors: Multicolored
Perforation: Die Cut 10¾
Gum type: Self-Adhesive
Themes: Worm, Sea Life
Total print: 4,000,000 (estimate)
Note: Face value US$0.50 on day of issue.
Stamp details: Marine Worm
Issued date: 22-02-2018 (dd/mm/yyyy)
Face value: 50c.
(FOREVER º - No Face Value)
Emission: Commemorative
Format: PSA pane of 20
First Day City: Fort Pierce, Florida
Catalogue No:-
Scott (USA): 5272
Michel (Germany): 5473
Yvert et Tellier (France): 5092
Dimensions (height x width):
24.8mm x 39.6mm
Designers: Edith Widder (photographer)
Printer: Banknote Corporation of America
Printing Method: Offset
Stamp Colors: Multicolored
Perforation: Die Cut 10¾
Gum type: Self-Adhesive
Themes: Worm, Sea Life
Total print: 4,000,000 (estimate)
Note: Face value US$0.50 on day of issue.
Description:- The gossamer worm is a genus of marine planktonic polychaetes. All described species are known to be holoplanktic, meaning that they spend their entire life cycles in the water column. E. Newton Harvey had noted the unusual yellow bioluminescence occurring from the parapodia. There are very few known marine animals that exhibit yellow luminescence. Many species of plankton are known to display this property of bioluminescence. The mechanisms of this process are not well understood; only that they do not use any of the currently known luciferins. If disturbed, a few species are known to release bioluminescent particles from their parapodia, though possibly all species of Tomopteris do this. It is thought that this mode is to distract predators, analogous to chaff or flares dispensed from military aircraft during evasive maneuvers. Generally, gossamer worms grow to only a few centimeters in overall length, or 20 millimetres (0.79 in) to 40 millimetres (1.6 in) in total length, though this is likely to reflect the size of those amenable to being caught in trawl nets.
Source: en.wikipedia.org/wiki/Tomopteris
Source: en.wikipedia.org/wiki/Tomopteris