The genus name " Psittacula " is a diminutive of Latin " psittacus ", " parrot ", and the specific " krameri " commemorates the Austrian naturalist Wilhelm Heinrich Kramer.
12.
It is probably for him that Giovanni Antonio Scopoli ( 1723 1788 ) dedicated " Psittacus krameri " ( today " Psittacula krameri " ) in 1769 . He is also known as an entomologist.
13.
It was described as a small parrot with a short and robust tarsometatarsus resembling the tarsometatarsi of large African parrots in the genera " Psittacus ", " Poicephalus " and " Coracopsis ".
14.
In vol . 2 he describes the African grey parrot ( grijze roodstaartpapegaai ) " Psittacus erithacus " in vol . 2, giving an extensive account of field observations done on the island of Pr�ncipe in de Gulf of Guinea.
15.
Though described by Johann Friedrich Gmelin in " Systema Naturae " as " Psittacus elegans " in 1788, the crimson rosella had been described and named by John Latham in 1781 as the " Beautiful Lory ", and then " Pennantian Parrot ".
16.
On Pr�ncipe island, they include a frog known as " Phrynobatrachus dispar " and a birds such as Dohrn's thrush-babbler ( " Horizorhinus dohrni " ) and the Pr�ncipe thrush ( " Turdus xanthorhynchus " ), and the African grey parrot ( " Psittacus erithacus " ).
17.
Fast growth allows the suspension feeders to access higher levels of the water column than their competitors, and to be large enough to resist displacement; species employing this response, such as the aptly named " Megabalanus ", can reach in length; other species may grow larger still ( " Austromegabalanus psittacus " ).
18.
Apart from differences in size, the two species are superficially similar, being green above, white below, and patterned with black transverse bands across the dorsal surface . " C . asellus " is commonly found in the aquarium trade while " C . psittacus " due to its size and more specialized requirements is not found as often.
19.
In addition to chimpanzees, seven other species were introduced to the island : Roan antelope ( " Hippotragus equinus " ) and rhinoceros ( " Diceros bicornis " ) both now extinct, Suni antelope ( " Neotragus moschatus " ), elephants ( Loxodonta africana ), twelve giraffes ( Giraffa camelopardalis ), 20 black-and-white colobus monkeys ( " Colobus guereza " ), and African grey parrots ( " Psittacus erithacus " ) confiscated from illegal trade; see.
20.
The African parrots, unlike their Neotropical cousins, are polyphyletic : " Agapornis " of Africa and Madagascar was found to be the sister group to " Loriculus " of Australasia and Indo-Malayasia and together they clustered with the Australasian " Loriinae ", " Cyclopsittacini " and " Melopsittacus " . " Poicephalus " and " Psittacus " from mainland Africa formed the sister group of the Neotropical " Arinae " and " Coracopsis " from Madagascar and adjacent islands may be the closest relative of " Psittrichas " from New Guinea.
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