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Insect morphometry is reproducible under average investigation standards.

Sándor Csősz1,2, Bernhard Seifert3, István Mikó4

  • 1MTA-ELTE-MTM Ecology Research Group Budapest Hungary.

Ecology and Evolution
|January 13, 2021
PubMed
Summary

This study demonstrates that consistent morphometric data collection protocols ensure reliable results in insect systematics. Morphometric studies on ants show high reproducibility, confirming their value for taxonomic research.

Keywords:
entomologymeasurement errormorphologyrepeatabilityspecies delimitationtaxonomy

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Area of Science:

  • Entomology
  • Systematics
  • Morphometrics

Background:

  • Morphometric research is increasingly applied across diverse organisms.
  • Its findings are often considered highly transferable, unlike discrete character interpretations.
  • Reliability of morphometric workflows in insect systematics requires focused investigation.

Purpose of the Study:

  • To assess the reproducibility of morphometric studies in ant systematics.
  • To evaluate data consistency when using a shared data collection protocol.
  • To determine the transferability of morphometric findings in taxonomic research.

Main Methods:

  • Eleven independent collaborators measured 21 continuous morphometric traits on the same ant specimens.
  • Intraclass correlation coefficients (ICC) were used to calculate repeatability and reproducibility.
  • Permutational multivariate analysis of variance (PERMANOVA) assessed gauger effects on species identity.

Main Results:

  • Average intraclass correlation coefficients (repeatability) ranged from 0.784 to 0.9897.
  • A significant correlation was found between repeatability and morphometric skill (p=0.016).
  • Intergauger agreement (reproducibility) varied (mean R=0.690), but all gaugers reached the same species-level conclusions; PERMANOVA showed no significant gauger effect (p=0.58).

Conclusions:

  • Morphometric studies are reproducible when standard protocols are followed.
  • Morphometric findings are widely transferable and remain a valuable data source for alpha taxonomy.
  • This validates the use of morphometrics in insect systematics and taxonomy.