Two Trees Site (Miocene of Australia)

Also known as TT Site, Riversleigh

Where: Queensland, Australia (19.1° S, 138.7° E: paleocoordinates 28.0° S, 135.9° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Faunal Zone C zone, Middle Miocene (16.0 - 11.6 Ma)

• Two Trees Site is currently interpreted to be middle Miocene in age (Faunal Zone C), principally on the basis of its stratigraphic position near the top of the Gag Plateau sequence (Arena, 2004). However, the Two Trees LF may be considerably younger (Archer et al., 1997), possibly even as young as Pliocene (Scanlon et al., 2003).

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; bioturbated, fine-grained, red lithology not reported

Size classes: macrofossils, mesofossils

Collection methods: Queensland Museum collection (QMF)

•University of New South Wales (AR)

Primary reference: R. Pian, M. Archer, and S. J. Hand. 2013. A New, Giant Platypus, Obdurodon tharalkooschild, sp. nov. (Monotremata, Ornithorhynchidae), from the Riversleigh World Heritage Area, Australia. Journal of Vertebrate Paleontology 33(6):1255-1259 [M. Uhen/J. David/T. Liebrecht]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 151091: authorized by Mark Uhen, entered by Tyler Fabian on 21.09.2013, edited by Mark Uhen and Torsten Liebrecht

Creative Commons license: CC BY (attribution)

Taxonomic list

• Scanlon (2001) lists a palatine bone (AR 8905) and further material (isolated vertebrae, teeth and ribs: QMF 23069, AR 12810 and 12811) from the TT Site which he says is distinct from Morelia riversleighensis and designates as "Pythoninae indet., cf. Liasis sp. or Python reticulatus". Scanlon et al. (2003, p. 591) again mention the palatine bone but say that it rather represents Liasis dubudingala. Pian et al. (2013), however, list M. riversleighensis as associated taxon of Obdurodon tharalkooschild but give no further information on that issue. Hence, it is possible that M. riversleighensis listed by Pian et al. (2013) and the Pythoninae indet. mentioned by Scanlon (2001) and Scanlon et al. (2003) represent the same taxon.
Osteichthyes
 Dipnoi -
Dipnoi indet. lungfish
Mammalia
 Monotremata - Ornithorhynchidae
Obdurodon tharalkooschild n. sp. Pian et al. 2013 platypus
 Chiroptera -
Chiroptera indet. Blumenbach 1779 bat
 Chiroptera - Hipposideridae
Hipposideridae indet. Lydekker 1891 leaf-nosed bat
 Peramelemorphia - Peramelidae
Peramelidae indet. Gray 1825 bandicoot
 Dasyuromorphia - Dasyuridae
Dasyuridae indet. Goldfuss 1820 marsupial
 Diprotodontia - Macropodidae
Macropodidae indet. Gray 1821 kangaroo
 Diprotodontia -
Phalangeroidea indet. Thomas 1888 diprotodont marsupial
 Diprotodontia - Pseudocheiridae
Pseudocheiridae indet. Winge 1893 ringtail possum
Paljara tirarensae Woodburne et al. 1987 ringtail possum
Reptilia
 Testudines -
"Chelonia indet." = Testudines
"Chelonia indet." = Testudines Batsch 1788 turtle
 Squamata - Pythonidae
Morelia riversleighensis Smith and Plane 1985 python
see comments on taxonomic list
 Squamata - Elapidae
Hydrophiinae indet. Boié 1827 sea snake
described as two distinct but generically indeterminate taxa, differing in shape and size of the parietals (sp. 1, the larger one: QMF 23071; sp. 2: QMF 42694), the remaining material cannot be differentiated taxonomically: 24 vertebrae (QMF 42695 to 42697), and 6 ribs (QMF 42698), see Scanlon (2003)
Amphibia
 Salientia -
Anura indet. Fischer von Waldheim 1813 frog
Actinopteri
 Teleostei -
Teleostei indet. Müller 1846