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The Dytiscidae – based on the Greek dytikos (δυτικός), "able to dive" – are the predaceous diving beetles, a family of water beetles. They occur in virtually any freshwater habitat around the world, but a few species live among leaf litter. The adults of most are between 1 and 2.5 cm (0.4–1.0 in) long, though much variation is seen between species. The European Dytiscus latissimus and Brazilian Megadytes ducalis are the largest, reaching up to 4.5 cm (1.8 in) and 4.75 cm (1.9 in) respectively. In contrast, the smallest is likely the Australian Limbodessus atypicali of subterranean waters, which only is about 0.9 mm (0.035 in) long. Most are dark brown, blackish, or dark olive in color with golden highlights in some subfamilies. The larvae are commonly known as water tigers due to their voracious appetite. They have short, but sharp mandibles and immediately upon biting, they deliver digestive enzymes into prey to suck their liquefied remains. The family includes more than 4,000 described species in numerous genera.
The great stripe-faced bat or stripe-faced vampire bat is a bat species found from southern Mexico to Bolivia and northwestern Brazil, as well as on Trinidad. The great stripe-faced bat is a frugivore. It is one of two species within the genus Vampyrodes the other being Vampyrodes major.
The sapphire-spangled emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is regularly found in Bolivia, Brazil, Peru, and Venezuela; as a vagrant in Argentina; and has possibly occurred in Ecuador.
The black-bellied thorntail is a species of hummingbird in the "coquettes", tribe Lesbiini of subfamily Lesbiinae. It is found in Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela.
The spangled coquette, coquette pailletée (French), coqueta coronada, or coqueta lentejuelada is a species of hummingbird in the "coquettes", tribe Lesbiini of subfamily Lesbiinae. It is found in Brazil, Colombia, Ecuador, Peru, and Venezuela.
The golden-spangled piculet is a species of bird in subfamily Picumninae of the woodpecker family Picidae. It is found in Brazil, Colombia, French Guiana, Guyana, Suriname, and Venezuela.
Meruidae is a family of aquatic beetles in the suborder Adephaga, with only one genus and species, Meru phyllisae. The beetle species was first found in the early 1980s. and fully described in 2005. At 0.8 mm (0.031 in), it is one of the smallest adephagan beetles in the world. A survey of aquatic beetles of Venezuela indicated that Meru is most common during the wet season, when larger areas of granitic rock surface are covered with water film, which the adult beetles as well as the larvae inhabit.
The Torridincolidae are a small family of beetles in the suborder Myxophaga. It contains these genera:
Cerro de la Neblina, also known as Serra da Neblina in Brazil and Sierra de la Neblina in Venezuela, is a sandstone massif located in the northern Amazon Basin. It is a tilted, heavily eroded plateau, with a deep canyon in its central portion, drained by the Baria River.
Ytu is a genus of beetles in the family Torridincolidae, containing these species:
Dryopidae is a family of beetles, commonly named long-toed water beetles, in the superfamily Byrrhoidea. It was described by Gustaf Johan Billberg in 1820.
Ytu angra is a species of Myxophagan beetle in the genus Ytu. It was discovered in 1977.
Tropisternus is a genus of hydrophilid beetles with 63 species in five subgenera in North and South America.
Mimasyngenes ytu is a species of beetle in the family Cerambycidae. It was described by Galileo and Martins in 1996. It is known from Brazil.
Cartwrightia cartwrighti is a species of aphodiine scarab found in South America. Oscar L. Cartwright named the species in 1967 after his brother. C. cartwrighti has been recorded in cow dung in pastures and forests.
Ytu zeus is a species of myxophagan beetle in the genus Ytu. It was discovered in 1973.
Ytu godayi is a species of myxophagan beetle in the genus Ytu. It was discovered in 1977.
Ytu mirandus is a species of myxophagan beetle in the genus Ytu. It was discovered in 1977.
Ytu mirim is a species of myxophagan beetle in the genus Ytu. It was discovered in 1977.
Ytu yaguar is a species of myxophagan beetle in the genus Ytu. It was discovered in 1977.