Tilin amber (NIGP collection) (Cretaceous of Myanmar)

Where: Myanmar (21.7° N, 94.1° E: paleocoordinates 4.0° N, 94.2° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Kabaw Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• One tuff sample (M-1) was collected just above the amber-bearing layers for LA-(MC)-ICP MS U–Pb dating. Ten analyses provide the youngest age at 72.1 ± 0.3 Ma in weighted mean value (MSWD = 0.6; uncertainties are given at the 2σ level). Some ammonites were also found preserved in nodules of brown sandstone underlying the amber layer. They belong to Sphenodiscus sp. Sphenodiscidae probably originated in the African epicontinental seas during Campanian, with the oldest Sphenodiscus associated with Libycoceras in the Middle East, Nigeria, and Peru, indicating a late Campanian appearance. The first appearance of Sphenodiscus sp. in central Myanmar suggests a late Campanian to Maastrichtian age, providing a lower constraint for Tilin amber. Together with the radioisotopic age of 72.1 ± 0.3 Ma for the upper constraint, Tilin amber should be within the latest Campanian age.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; amber

Size class: macrofossils

Reposited in the NIGPAS

Primary reference: D. R. Zheng, S. C. Chang, V. Perrichot, S. Dutta, A. Rudra, L. Mu, R. S. Kelly, S. Li, Q. Zhang, J. Wong, J. Wang, H. Wang, Y. Fang, H. C. Zhang, and B. Wang. 2018. A Late Cretaceous amber biota from central Myanmar. Nature Communications 9(3170):1-6 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 195455: authorized by Matthew Clapham, entered by Matthew Clapham on 09.08.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hemiptera - Achilidae
Achilidae indet. achilid planthopper
NIGP 168505
 Psocodea - Lepidopsocidae
Lepidopsocidae indet. scaly-winged bark louse
NIGP 168506
 Dicondylia -
Blattaria indet. Latreille 1810 cockroach
NIGP 168507
 Mantodea -
Burmantis sp. Grimaldi 2003 mantis
NIGP 168508
 Hymenoptera - Formicidae
Dolichoderinae "indet. A" Forel 1878 ant
NIGP 168510
Dolichoderinae "indet. B" Forel 1878 ant
NIGP 168511, ?168513
Dolichoderinae "indet. C" Forel 1878 ant
NIGP 168512
? Ponerinae indet. Lepeletier de Saint-Fargeau 1835 ant
NIGP 168514
 Hymenoptera - Braconidae
Braconidae indet. Nees 1811 wasp
NIGP 168500
 Hymenoptera - Diapriidae
"Diapriidae indet." = Diapriinae
"Diapriidae indet." = Diapriinae Haliday 1833 wasp
NIGP 168501
 Hymenoptera - Scelionidae
Scelionidae indet. Thomson 1858 wasp
NIGP 168502
 Diptera - Chironomidae
Chironomidae indet. Macquart 1838 non biting midge
NIGP 168504
 Diptera - Ceratopogonidae
Protoculicoides sp. Boesel 1937 biting midge
NIGP 168503
 Neuroptera - Berothidae
Berothidae indet. Handlirsch 1906 beaded lacewing
NIGP 168505
unclassified
  -
Bryophyta indet.
NIGP 168509