Size reference
Source supported6 mm including wax egg sac
Adult female BA14011 reference; ovisac3 mm long, first instars~0.3 mm; these are different stages and structures. [D1]
EXHIBIT 224
Wathondara
Wathondara
Prehistoric insect
Wathondara was a Cretaceous scale insect whose amber fossil preserves a female, wax egg sac and young. [3]
TWO WAYS TO PICTURE THE PAST
Science & the silver screen
Compare the evidence with the familiar movie image. The illustrations are not to a shared scale.
01 / SOURCE-INFORMED RECONSTRUCTION
A life reconstruction from the evidence
Image unavailableIllustrative life reconstruction of Wathondara in a period-appropriate environment; coloration and missing anatomy are interpretations.The exhibit and its credited image source remain available.
An illustrative reconstruction. Compare its anatomy with the evidence and limitations in the dossier. [1]
Source-informed reconstruction. Appearance evidence [1]. Original illustration; missing anatomy, coloration and scenery include interpretation.
Fossils constrain this life reconstruction. Missing anatomy, coloration and the environmental scene include interpretation; the dossier explains the evidence limits.
02 / MOVIE-STYLE INTERPRETATION
A cinematic imagination
Image unavailableIllustrative living reconstruction of Wathondara; missing anatomy and exact colors remain uncertain.The exhibit and its credited image source remain available.
An illustrative reconstruction. Compare its anatomy with the evidence and limitations in the dossier. Lighting, coloration and scenery are artistic choices. This image does not document a fossil locality or behavior.
Original artwork · artistic interpretation.
Scientific view: source-informed reconstruction, credited paleoart or specimen-based imagery. Movie-style view: Original artistic interpretation. Reconstructions involve uncertainty.
PERIODLate Cretaceous (Cenomanian)[1]
DIETPlant sap feeding inferredEvidence and uncertainty in the dossier
TOTAL LENGTHSee the dossierEstimate scope matters
FOSSILS FOUNDMyanmar[1]
MEET THE ANIMAL
Meet Wathondara
Wathondara was a tiny scale insect from the Cretaceous forest recorded in Kachin amber in Myanmar. Amber forms from tree resin, which can trap small animals. The main fossil preserves an adult female together with eggs and newly hatched young. It is an insect in the ensign scale-insect family, rather than a dinosaur or a beetle. [D3]
Its wax covering made a shelter for the next generation. The female carried roughly 60eggs in a wax egg sac, and six young were preserved nearby. The researchers interpreted that shelter as protection from drying out and predators. This is unusually clear fossil evidence of brood care. It does not show that the insects lived in an ant-like colony or that several adults shared the work. [D2]
The described adult measures6 millimeters long including its egg sac. The tiny first-stage young measure about 0.3 millimeter, so those numbers must not be mixed into one adult size range. The amber piece weighs0.8 gram, but that is not the insect’s weight. Even with a rich fossil like this, the exact living host plant and the insect’s body mass remain unknown. [D1]
PREHISTORIC ANIMAL DOSSIER
A life in profile.
The animal, the evidence, and the questions still open.
Resin preserved reproductive evidence; the amber’s weight is not the insect’s body mass. [D1]
Profile scope: Genus — Wathondara; anchored to W. kotejai adult female BA14011, Kachin amber, Myanmar, about 99 million years old. [D1]
- Time
- Late Cretaceous (Cenomanian)
- Fossil locations in this exhibit
- Myanmar
How to read the evidence
Source supported identifies a description documented by the cited source. Inferred marks a reconstruction or functional estimate. Debated marks competing interpretations. Not established means the sources reviewed for this dossier do not support a firm conclusion; it does not mean a behavior never occurred.
A size reference is an estimate, not a population range. Nesting evidence does not by itself establish courtship, mate choice, or lifelong pairing.
Body mass
Not establishedNot established here
The paper’s0.8 g measurement concerns the amber piece, not the insect. [D1]
Diet
InferredPlant sap feeding inferred
Scale-insect comparison suggests sap feeding; the actual host plant is unidentified. [D3]
Habitat
InferredResin-producing woodland inferred
Kachin amber supplies burial context; a particular living tree or leaf host remains unidentified. [D2]
Movement
Source supportedLegged female; wingless
The adult has developed legs and no wings; activity and speed are not preserved. [D1]
Distinctive anatomy
Source supportedFlattened body and wax lobes
The female has segmented antennae and a dorsal wax covering with nine paired marginal lobes. [D1]
Reproduction & life together
Reproduction
Source supportedEgg sac and first instars preserved
About60eggs and six first-instar nymphs occur with the adult female and wax ovisac. [D1]
Courtship
Not establishedNot established here
The described female and brood provide no male or mating sequence. [D2]
Social behavior
Source supportedMaternal brood protection
A carried wax sac protected offspring; this does not demonstrate cooperative colony behavior. [D2]
Dossier research & sources
Sources and inspection notes for the claims in this profile.
- Brood care in a 100-million-year-old scale insecteLife; Wang et al., 2015 · Accessed 2026-10-06Original full article captured via EuropePMC and results/discussion inspected: BA14011, adult6×2 mm including ovisac,~60eggs0.3×0.2 mm, six first instars, wax formula, locality and98.8±0.6Ma matrix dating. Amber0.8 g is excluded from animal mass. · Inspected: page
- 100Millionen Jahre alte Schildlaus betrieb BrutpflegeUniversity of Bonn, 2015 · Accessed 2026-10-06Full institutional research-team release captured and inspected: female wax protection against desiccation/predators, preserved eggs/nymphs, comparative plant feeding and resin-to-leaf trapping hypothesis. Superlative earliest-ever claim is not repeated. · Inspected: page
- Female Insect Carrying Egg Sac Trapped in100Million Year Old AmberNanjing Institute of Geology and Palaeontology, CAS, 2015 · Accessed 2026-10-06Full institutional hosted research news captured and inspected; brood-care finding and comparative sap feeding. The page republishes news rather than constituting an independent experimental replication. · Inspected: page
- ITIS Report: Wathondara kotejaiIntegrated Taxonomic Information System; ScaleNet source, 2025 · Accessed 2026-10-06Actual taxonomic database body inspected: W. kotejai valid status, Ortheziidae placement and accepted genus; database update is not a new fossil behavior study. · Inspected: page
THE STORY IN THE FOSSILS
A wax shelter in ancient resin
A preserved brood can reveal more than an isolated adult. The wax shelter supports offspring protection, while the female’s mating behavior and any social colony remain unrecorded. [2]
A note on scale and time
The dossier identifies the scope of each reference estimate. A mount, an individual fossil and a species-wide adult range are different measurements. Comparison metrics remain unavailable where adult scope has not been established. Unknown does not mean zero.
Sources & editorial notes
Sources support the stated claims and scopes. Refer to the evidence notes for uncertainty.
- Brood care in a 100-million-year-old scale insecteLife; Wang et al., 2015 · Accessed 2026-10-06Original full article captured via EuropePMC and results/discussion inspected: BA14011, adult6×2 mm including ovisac,~60eggs0.3×0.2 mm, six first instars, wax formula, locality and98.8±0.6Ma matrix dating. Amber0.8 g is excluded from animal mass. · Inspected: page
- 100Millionen Jahre alte Schildlaus betrieb BrutpflegeUniversity of Bonn, 2015 · Accessed 2026-10-06Full institutional research-team release captured and inspected: female wax protection against desiccation/predators, preserved eggs/nymphs, comparative plant feeding and resin-to-leaf trapping hypothesis. Superlative earliest-ever claim is not repeated. · Inspected: page
- Female Insect Carrying Egg Sac Trapped in100Million Year Old AmberNanjing Institute of Geology and Palaeontology, CAS, 2015 · Accessed 2026-10-06Full institutional hosted research news captured and inspected; brood-care finding and comparative sap feeding. The page republishes news rather than constituting an independent experimental replication. · Inspected: page
- ITIS Report: Wathondara kotejaiIntegrated Taxonomic Information System; ScaleNet source, 2025 · Accessed 2026-10-06Actual taxonomic database body inspected: W. kotejai valid status, Ortheziidae placement and accepted genus; database update is not a new fossil behavior study. · Inspected: page
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