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Lamellae on a gecko's foot. In surface anatomy , a lamella is a thin plate-like structure, often one amongst many lamellae very close to one another, with open space between. Aside from respiratory organs, they appear in other biological roles including filter feeding and the traction surfaces of geckos .
The interactions between the gecko's feet and the climbing surface are stronger than simple surface area effects. On its feet, the gecko has many microscopic hairs, or setae (singular seta), arranged into lamellae that increase the Van der Waals forces - the distance-dependent attraction between atoms or molecules - between its feet and the surface.
Male with 7-20 femoral pores on each side. Tail depressed, annulate, with rows of 8 or 6 spine-like tubercles, below with a series of transversely dilated plates. Limbs granular, the upper part of the hind limb with large keeled tubercles; digits free, dilated, the free distal joint long, 3-6 lamellae under the inner, 6-8 under the median toes.
Gecko toes seem to be double-jointed, but this is a misnomer, and is properly called digital hyperextension. [31] Gecko toes can hyperextend in the opposite direction from human fingers and toes. This allows them to overcome the van der Waals force by peeling their toes off surfaces from the tips inward.
Snout longer than the distance between the eye and the ear-opening, 1.5 times the diameter of the orbit; forehead concave; ear-opening rather large, suboval, vertical. Body and limbs stout. Digits free, inner well developed, strongly dilated; with straight transverse lamella beneath; 11 or 12 under the inner digits, 13 to 15 under the median.
Hemidactylus is a genus of the common gecko family, Gekkonidae. [3] [4] It has 195 [5] described species, newfound ones being described every few years.These geckos are found in all the tropical regions of the world, extending into the subtropical parts of Africa and Europe.
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It has a snout to vent length up to at least 105 mm. [3] [5] It is also characterized by a dorsal scalation of small granules intermixed with large, pointed, trihedral tubercles that form 16–17 fairly regularly arranged longitudinal rows at midbody; 9–11 subdigital lamellae below the first and 11–13 below the fourth digit; 6–8 strongly pointed and keeled enlarged tubercles on the ...