Hylaeamys megacephalus (rodent)
Variant names: Oryzomys megacephalus

Mass: 57.8 g based on Camargo et al. 2015, Lescat et al. 2013, and Musser et al. 1998

Abundance: 3.52 to 16.08% (median 7.96%)

Latitudinal range: -18.3° to 2.3°

Habitats: tropical/subtropical dry broadleaf forest (2), tropical/subtropical moist broadleaf forest (3), tropical/subtropical savanna (4)

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Found in 9 samples

Brazil: Pinkaití Research Station (ground), Araguaia National Park (grasslands), Alta Floresta (Sherman traps), Emas National Park (live traps), Emas National Park (pitfall traps), Fazenda Santa Fé, Fazenda Lago Verde, Fazenda Aparecida

French Guiana: Trois-Sauts

Size measurements:
body mass56.8 gN = 16Camargo et al. 2015
body mass30 gN = 14Lescat et al. 2013
body mass51.9 gN = 13Musser et al. 1998
body mass74.2 gN = 9Musser et al. 1998
body mass59.2 gN = 21Musser et al. 1998
body mass71.3 gN = 27Musser et al. 1998
body mass66.1 gN = 10Musser et al. 1998
body mass63.8 gN = 12Musser et al. 1998
condyloincisive length28.23 mmN = 21Emmons and Patton 2005
♀ ear length20 mmN = 1Allen 1899
ear length21.92 mmN = 12Emmons and Patton 2005
♀ head and body length120 mmN = 1Allen 1899
♀ hind foot length28 mmN = 1Allen 1899
hind foot length28.08 mmN = 12Emmons and Patton 2005
♀ lower tooth row length5 mmN = 1Allen 1899
♀ skull width16 mmN = 1Allen 1899
skull width15.80 mmN = 20Emmons and Patton 2005
♀ tail length100 mmN = 1Allen 1899
tail length112.00 mmN = 12Emmons and Patton 2005
♀ total body length220 mmN = 1Allen 1899
total body length236.08 mmN = 12Emmons and Patton 2005
♀ upper tooth row length4.5 mmN = 1Allen 1899
upper tooth row length4.64 mmN = 21Emmons and Patton 2005

See also Hylaeamys, Hylaeamys acritus, Hylaeamys perenensis, Hylaeamys sp., Hylaeamys yunganus