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Thomisus


Thomisus
Photo Information
Copyright: jitti coowanitwong (jcoowanitwong) Gold Star Critiquer/Gold Note Writer [C: 1679 W: 0 N: 3120] (13754)
Genre: Animals
Medium: Color
Date Taken: 2006-09-24
Categories: Spiders
Camera: canon s3 is
Exposure: f/8, 1/500 seconds
Details: (Fill) Flash: Yes
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2006-10-25 4:42
Viewed: 3880
Points: 32
[Note Guidelines] Photographer's Note
'Thomisus Stoliczka' spiders normally use flowers as a place for ambush. This particular one choose a flower that wither when the sun up high. This is how it adapts when flower petals folded. (This picture was taken at 13.41 on 24/9/06)

The Spider

Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Superfamily: Thomisoidea
Family: Thomisidae (Crab Spiders)
Genus: Thomisus
Species: Thomisus stoliczka (Stoliczka's Crab Spider - named after Ferdinand Stoliczka (May 1838 - June 19, 1874) an Austrian/Czech palaeontologist)


The Thomisdae, or Crab spiders are the masters of ambush and disguise. They are called crab spiders because of their crab-like appearance and sideways motion.

The first two pairs of legs in most Crab Spiders are longer and thicker than the last 2 pairs, and are armed with spines for holding and grasping prey. The abdomen is triangular in shape, being widest posteriorly. Its lateral eyes are situated on projections.

The most conspicuous genus, Thomisus (the flower crab spider, is short and squat, ranging in size from 3-11mm. Its glabrous integument (exoskeleton) is cryptically coloured, taking on the colour of its surroundings.This colour change facilitates camouflage on flower ambush sites and is completed within 2 days.

Thomisus is a sedentary spider and is usually noticed only when one sees a strangely positioned, usually upside down, insect and upon investigation, the insect can be seen to be in the grips of a spider. Thomisus waits for flying insects to settle, patient and motionless, with outstretched legs. She can catch insect up to 3 times her size. The insect is then bitten behind the head and killed. The insides are dissolved and sucked from the exoskeleton and the empty, perfect form of the insect is dropped to the ground.

Often a small brown male can be seen riding piggyback on the female. The male seeks out a sub adult female and waits for her final moult at which time she is incapable of resisting his advances or attacking him. He makes his move and mates and then leaves to seek another defenceless mate. The females probably secretes pheromones before the moult which attracts the males. After mating, she lays her eggs in a leaf curled much like an ice cream cone. She guards the eggs without eating and dies later leaving her offspring to disperse.

They are also commonly called "flower spiders" because they are most often found on flowers, lying in ambush for prey.

Spiders of an unrelated genus, Sicarius, also resemble crabs and are sometimes referred to as "crab spiders".

http://www.museums.org.za/bio/spiderweb/thomisid.htm
Wikipedia


The Flower

Family: Turneraceae
Genus: Turnera (TER-ner-uh)
Species: ulmifolia (ul-mif-FOH-lee-uh)
Common Name: Yellow Buttercups, Yellow Alder, Sage Rose , ดอกบานเช้าสีเหลือง
Category: Tropicals/Tender Perennials

Sage rose blooms daily in the morning and normally withter before noon.

LordPotty, ramthakur, fartash, jeanpaul, BEHRAD, SkyF, dew77, magal, biawak, Shoot_Score has marked this note useful
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Critiques [Translate]

Wasn't sure what this was when I looked at the thumbnail.Another contender for the camouflage theme I'd say.
A good clear shot of this strange spider.
A very comprehensive note too.
Good work.
Steve

Hi Jitti,
It took me a little while to see the spider there actually :) No wonder why... I like those stunning spiders. Before joigning TN, I had no idea these spider were existing and it was one of my first shot I published here. TN helps me to open my eyes to an unknown world :) I like this composition and good details you caught here. This is an unusual pose for it as you often see them very still and not moving. Thanks,
Claudine

This surely is a strange spider, JC. Difficult to tell it apart from the flower it is clinging to. Effective camouflage, I must say.
The black BG obtained with fill flash does wonders in highlighting the subjects.
TFS and bye.
Ram

  • Great 
  • pvs Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1127 W: 254 N: 3161] (14464)
  • [2006-10-25 7:50]

Hi Jitty,

Well camouflaged ambush well seen and captured with good POV colors,well done and TFS

Paul

Hello Jitti
Very nice shot of spider,Good
lighting and composition.
Welldone

Regards
Fartash

Bonjour Jetti

Elle est très jolies cette prise de vue avec ce superbe de macro de cette araignée au couleurs spéciales,les couleurs ,les détails sont excellents tout comme la composition.
Merci pour le partage...JP

Hi Jitti
Perfect macro.
Great sharpness and colours.
ALso very good colours and BG.
I like it.
Regards

  • Great 
  • SkyF Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2234 W: 188 N: 1912] (8073)
  • [2006-10-25 13:29]

Hi Jitti,
arms wide open ready to attack. This spider sure knows the art of camouflage. Very well captured with a wonderful POV and great colors. DOF, sharpness and the composition with this dark BK looks great.
TFS..Sky

  • Great 
  • dew77 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4432 W: 248 N: 4028] (13270)
  • [2006-10-25 14:29]

Hello Jitti,
Excellent close up.I liked POV,colors,contrast,lighting and composition a lot.
TFS...:-)

Hello Jitti,

Another great photo you have capture here, Perfect details, Bg, POV DOF perfect colors, great Job,

TFS Kyle

Hello JC,
Awesome capture!
I love the light and the effective contrast to the dark background...
Superb macro work, with good clarity in colours and superb details!
Greetings,
Pablo -

hi jitti
felicitation,il fallait avoir le coup d'oeil pour trouver cette petite araignée.
laurent

  • Great 
  • edal Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 374 W: 48 N: 413] (1853)
  • [2006-10-26 17:47]

Your photo shows how inventive is nature - the small hunter is ambushing insects at their "reataurants". Nice colors and a thorough note.
Anton

  • Great 
  • magal Gold Star Critiquer/Gold Note Writer [C: 224 W: 0 N: 313] (1251)
  • [2006-10-29 2:08]

Hi Jitti,
Beautiful shot, with sharp detail and very vivid colours. Your shot shows to good effect the mimicry capabilities of the spider. Even looking hard at the shot it is still difficult to make it out. Very well seen and captured and very good use of the flash.
TFS and for the informative note
Mark

jc.,
I sincerely admire you.
You take such METICULAS care to educate us via your notes and unusual registers. Never knew such creatures
existed.
Excellet photography.
Excellent clarity. Well composed & presented.
Best regards, M.

Excellent capture. The stance with the legs out like that is so believable as part of the flower. Just got my first one the other day...

Themed! Thanx for sharing! ;j.

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