Liang Bua, the type locality of Homo floresiensis, is a limestone cave located in the western part of the Indonesian island of Flores. The relatively continuous stratigraphic sequence of the site spans the past ∼190 kyr and contains ∼275,000 taxonomically identifiable vertebrate skeletal elements, ∼80% of which belong to murine rodent taxa (i.e., rats). Six described genera are present at Liang Bua (Papagomys, Spelaeomys, Hooijeromys, Komodomys, Paulamys, and Rattus), one of which, Hooijeromys, is newly recorded in the site deposits, being previously known only from Early to Middle Pleistocene sites in central Flores. Measurements of the proximal femur (n = 10,212) and distal humerus (n = 1186) indicate five murine body size classes ranging from small (mouse-sized) to giant (common rabbit-sized) are present. The proportions of these five classes across successive stratigraphic units reveal two major changes in murine body size distribution due to significant shifts in the abundances of more open habitat-adapted medium-sized murines versus more closed habitat-adapted smaller-sized ones. One of these changes suggests a modest increase in available open habitats occurred ∼3 ka, likely the result of anthropogenic changes to the landscape related to farming by modern human populations. The other and more significant change occurred ∼60 ka suggesting a rapid shift from more open habitats to more closed conditions at this time. The abrupt reduction of medium-sized murines, along with the disappearance of H. floresiensis, Stegodon florensis insularis (an extinct proboscidean), Varanus komodoensis (Komodo dragon), Leptoptilos robustus (giant marabou stork), and Trigonoceps sp. (vulture) at Liang Bua ∼60-50 ka, is likely the consequence of these animals preferring and tracking more open habitats to elsewhere on the island. If correct, then the precise timing and nature of the extinction of H. floresiensis and its contemporaries must await new discoveries at Liang Bua or other as yet unexcavated sites on Flores.
Keywords: Island southeast Asia; Rats; Zooarchaeology.
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The spatio-temporal distribution of archaeological and faunal finds at Liang Bua (Flores, Indonesia) in light of the revised chronology for Homo floresiensis.J Hum Evol. 2018 Nov;124:52-74. doi: 10.1016/j.jhevol.2018.07.001. Epub 2018 Aug 31. J Hum Evol. 2018. PMID: 30173885
Late Pleistocene songbirds of Liang Bua (Flores, Indonesia); the first fossil passerine fauna described from Wallacea.PeerJ. 2017 Aug 17;5:e3676. doi: 10.7717/peerj.3676. eCollection 2017. PeerJ. 2017. PMID: 28828271 Free PMC article.
The Liang Bua faunal remains: a 95k.yr. sequence from Flores, East Indonesia.J Hum Evol. 2009 Nov;57(5):527-37. doi: 10.1016/j.jhevol.2008.08.015. Epub 2008 Dec 6. J Hum Evol. 2009. PMID: 19058833
The size of scalable brain components in the human evolutionary lineage: with a comment on the paradox of Homo floresiensis.Homo. 2007;58(1):1-12. doi: 10.1016/j.jchb.2006.11.001. Epub 2007 Jan 22. Homo. 2007. PMID: 17240374 Review.
Flores hominid: new species or microcephalic dwarf?Anat Rec A Discov Mol Cell Evol Biol. 2006 Nov;288(11):1123-45. doi: 10.1002/ar.a.20389. Anat Rec A Discov Mol Cell Evol Biol. 2006. PMID: 17031806 Review.