Freckle regular use of sunblock can inhibit their development. Liver spots (also known as sun spots and lentigines) look like large freckles, but they form after years of exposure to the sun. Liver spots are more common in older people. Freckle Freckles are clusters of concentrated melaninized cells which are most easily visible on people with a fair complexion. Freckles do not have an increased number of the melanin-producing cells, or melanocytes, but instead have melanocytes that overproduce melanin granules (melanosomes) changing the coloration of the outer skin cells (keratinocytes). As such, freckles are different from lentigines and moles, which are
Bigtooth river stingray concentrically clustered yellow-orange spots. Two other close relatives where the spots are yellowish-white (as in "P. henlei") are found in other Brazilian rivers: "P. leopoldi" from the Xingu River basin and "P. albimaculata" from the Tapajós River basin. Compared to "P. leopoldi", "P. henlei" is duller above, appearing blackish or dark gray-brown (as opposed to deeper black in "P. leopoldi"), and its underparts have a large white center and broad brownish-dusky edges (underparts mostly brownish-dusky in "P. leopoldi"). Compared to "P. albimaculata", "P. henlei" has larger yellowish-white spots above. Bigtooth river stingray The bigtooth river stingray or Tocantins River ray