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A petechia (/ p ɪ ˈ t iː k i ə /; [1] pl.: petechiae) is a small red or purple spot (≤4 mm in diameter) that can appear on the skin, conjunctiva, retina, and mucous membranes which is caused by haemorrhage of capillaries. [2] [3] The word is derived from Italian petecchia 'freckle', of obscure origin. [1]
Cherry angioma, also called cherry hemangioma [1] or Campbell de Morgan Spot, [2] is a small bright red dome-shaped bump on the skin. [3] It ranges between 0.5 – 6 mm in diameter and usually several are present, typically on the chest and arms, and increasing in number with age. [3] [4] If scratched, they may bleed. [5]
The sexes appear similar, and cannot be distinguished upon observation. [11] The eyes can appear as giant black dots with a small yellow ring, or as giant yellow irises with small pupils due to voluntary pupil constriction. [11] The potoo has two or three slits in the eyelid so that it can see when the eyelids are closed; these notches are ...
The queens and workers appear very similar to Vespula germanica, except when they are seen head on, as the V. vulgaris face lacks the three black dots of V. germanica. Instead, each has only one black mark on its clypeus, which is usually anchor or dagger-shaped. This applies to queens and workers only.
A plantar wart is a small lesion that appears on the surface of the skin and typically resembles a cauliflower, with tiny black petechiae (tiny hemorrhages under the skin) in the center. Pinpoint bleeding may occur when these are scratched. Plantar warts occur on the soles of feet and toes.
Visual snow: dynamic, continuous, tiny dots observed across the entire visual field at any time of the day, regardless of lighting conditions, persisting for more than three months. The dots are usually black/gray on a white background and gray/white on a black background; however, they can also be transparent, white flashing, or colored.
The larvae of this species have a stout head and body, dark in coloration, lack spots, and tend to have distinct mottling or streaks. [7] Another distinguishing characteristic of P. ruber is the appearance of numerous irregular black spots down its back. Although the red salamander is brilliantly colored and has many distinguishing features, it ...
The face of the common wasp worker does not have distinct dots. The German wasp is about 13 mm (0.5 in) long, has a mass of 74.1 ± 9.6 mg, [ 2 ] and has typical wasp colours of black and yellow. It is very similar to the common wasp ( V. vulgaris ), but unlike the common wasp, has three tiny black dots on the clypeus .