Hypsodonty Index

Compute caller convention unworn crown height/buccolingual width hypsodonty and screen a comparison band; observed worn height is a different tool, and neither index establishes diet.

Description

Hypsodonty compares unworn crown height with a specified crown width.

Hypsodonty compares unworn crown height with a specified crown width. A worn crown belongs to a different measurement convention.

Compute caller convention unworn crown height/buccolingual width hypsodonty and screen a comparison band; observed worn height is a different tool, and neither index establishes diet.

When to use Hypsodonty Index

Use this tool to compute caller convention unworn crown height/buccolingual width hypsodonty and screen a comparison band; observed worn height is a different tool, and neither index establishes diet.

Prepare the fossil measurements or occurrence records and the chosen calibration parameters. Retain the stated coordinate, age and measurement conventions.

How to use Hypsodonty Index and understand its results

Prepare the fossil measurements or occurrence records and the chosen calibration parameters. Retain the stated coordinate, age and measurement conventions.
Enter unwornCrownHeightsMm, crownBuccolingualWidthsMm, callerIndexBounds using the field table and calculation rules, then run the tool.
Read perToothHypsodontyIndexes, withinCallerHypsodontyBandFlags. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
unwornCrownHeightsMm	Unworn crown heights mm	list of number	Required
crownBuccolingualWidthsMm	Crown buccolingual widths mm	list of number	Required
callerIndexBounds	Caller index bounds	list of number	Required

Align positive heights and widths with two ordered positive comparison bounds. Return ratios and inclusive band flags.^[1]

Paired lists must be nonempty and have equal lengths.

index = unworn crown height/buccolingual width

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
perToothHypsodontyIndexes	Per tooth hypsodonty indexes	list of number
withinCallerHypsodontyBandFlags	Within caller hypsodonty band flags	list of number

json

{
  "input": {
    "unwornCrownHeightsMm": [
      10,
      20
    ],
    "crownBuccolingualWidthsMm": [
      5,
      5
    ],
    "callerIndexBounds": [
      2,
      3
    ]
  },
  "output": {
    "perToothHypsodontyIndexes": [
      2,
      4
    ],
    "withinCallerHypsodontyBandFlags": [
      1,
      0
    ]
  }
}

Limitations and assumptions

The supplied convention and band do not establish diet.

Numbers and computed results must be finite; overflow produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Tooth Crown Height Wear Stage Rater: Screen measured relative tooth crown loss against caller wear bands on comparable unworn reference crowns; no embedded species ages, reconstructed wear history or diet diagnosis. For a complementary task, use Microwear Scratch-Pit Density Ratio Classifier: Measure surface-standardized scratch/pit densities and caller ratio band, requiring positive pit denominators; proxy class does not identify foods, habitual diet or ancestry.

References

Hypsodonty Index — tool.io

Similar or alternative tools

Tooth Crown Height Wear Stage Rater
Screen measured relative tooth crown loss against caller wear bands on comparable unworn reference crowns; no embedded species ages, reconstructed wear history or diet diagnosis.
Microwear Scratch-Pit Density Ratio Classifier
Measure surface-standardized scratch/pit densities and caller ratio band, requiring positive pit denominators; proxy class does not identify foods, habitual diet or ancestry.