Wai Lek pit (Eocene of Thailand)

Also known as Krabi Basin; Ban Wai lek

Where: Thailand (8.0° N, 99.1° E: paleocoordinates 6.0° N, 103.0° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Krabi Basin B2 Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

• from the "Main lignite seam (Formation B2)" which has "yielded almost all mammal remains known from Krabi" (Ducrocq et al. 2006)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lignite

Size classes: macrofossils, mesofossils

Collection methods: quarrying

Primary reference: J.-C. Rage, E. Buffetaut, H. Buffetaut-Tong, Y. Chaimanee, S. Ducrocq, J.-J. Jaeger, and V. Suteethorn. 1992. A colubrid snake in the late Eocene of Thailand: the oldest known Colubridae (Reptilia, Serpentes). Comptes Rendus de l’Académie des Sciences, Paris. Série 2 314:1085-1089 [J. Head/J. Head/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49078: authorized by Jason Head, entered by Jason Head on 07.04.2005, edited by John Alroy, Patricia Holroyd, Lars van den Hoek Ostende, Philip Mannion, Mark Uhen and Pauline Coster

Creative Commons license: CC BY (attribution)

Taxonomic list

• a large number of additional papers on mammals have not been entered yet
Reptilia
 Testudines - Panemydidae
? Emydidae indet.6 Rafinesque 1815 turtle
 Crocodylia - Alligatoridae
Allognathosuchus sp.6 Mook 1921 crocodilian
Krabisuchus siamogallicus10 Martin and Lauprasert 2010 crocodilian
Kr-C specimens
 Crocodylia -
cf. Eosuchus lerichei6 Dollo 1907 crocodilian
 Squamata - Boidae
Boidae indet.6 Gray 1825 boa
 Squamata - Colubridae
Colubridae indet. Oppel 1811 colubrid snake
Mammalia
 Primates - Amphipithecidae
Siamopithecus eocaenus2 Chaimanee et al. 1997 monkey
DMR TF 3634
 Primates - Tarsiidae
Tarsiidae indet.8 Gray 1825 tarsier
TF 3476; "omomyids cannot be ruled out"
 Primates - Ekgmowechashalidae
Gatanthropus sp.13 Ni et al. 2016 primate
TF 3475; originally entered as "Ampithecidae indet."
 Dermoptera -
Dermotherium major n. gen. n. sp.7
Dermotherium major n. gen. n. sp.7 Ducrocq et al. 1992 colugo
DMR TF 2580 - holotype
 Perissodactyla - Paraceratheriidae
"? Guixia cf. simplex" = Juxia1
"? Guixia cf. simplex" = Juxia1 odd-toed ungulate
TF 2657 and 2658
 Perissodactyla -
Siamolophus krabiense n. gen. n. sp.9
Siamolophus krabiense n. gen. n. sp.9 Ducrocq et al. 2006 odd-toed ungulate
 Carnivora - Miacidae
 Carnivora - Nimravidae
Nimravus cf. intermedius14 Filhol 1872 false sabre-tooth
Hoplophoneus sp.14 Cope 1874 false sabre-tooth
 Ungulata -
Egatochoerus jaegeri3 Ducrocq 1994 even-toed ungulate
DMR TF 2672, 2674, 2826 and 2827
Siamotherium krabiense6 Suteethorn et al. 1988 even-toed ungulate
 Ungulata - Anthracotheriidae
Anthracotherium chaimanei n. sp.4, "Anthracokeryx thailandicus n. sp." = Anthracotherium thailandicus4
Anthracotherium chaimanei n. sp.4 Ducrocq 1999 anthracothere
DMR TF 2636 - type
"Anthracokeryx thailandicus n. sp." = Anthracotherium thailandicus4 Ducrocq 1999 anthracothere
DMR TF 2638 - type
 Ungulata - Tragulidae
Archaeotragulus krabiensis n. gen. n. sp.11, Krabimeryx primitivus n. gen. n. sp.11
Archaeotragulus krabiensis n. gen. n. sp.11 Metais et al. 2001 chevrotain
Krabimeryx primitivus n. gen. n. sp.11 Metais et al. 2001 chevrotain
 Ungulata -
Krabitherium waileki12 Métais et al. 2007 ruminant