Comparative Larval Morphometric Analysis

We re-used parts of data of the head and stylet shape from Haug et al.^{19 (link)}. Specimens included are extant larvae of the groups Berothidae and Dilaridae as well as fossil larvae potentially representing the same two groups. Additionally, of two specimens depicted in Badano et al.^{58 (link)} the outlines of the head capsule and stylets were redrawn in Adobe Illustrator CS2. Finally, of one of the newly reported larvae the outline of head capsule and stylets were also redrawn and included into the data set. All these outline drawings were transformed into bitmap files and included into an Elliptic Fourier Analysis (EFA) performed with the software SHAPE^{81 (link)}, followed by a principal component analysis (PCA) (for details, see^{19 (link),82 (link)}).

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Haug J.T, & Haug C. (2022). 100 Million-year-old straight-jawed lacewing larvae with enormously inflated trunks represent the oldest cases of extreme physogastry in insects. Scientific Reports, 12, 12760.

Publication 2022

Illustrator CS2

Capsule Head Larvae

Corresponding Organization :

Other organizations : Ludwig-Maximilians-Universität München

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Variable analysis

independent variables

Data of the head and stylet shape from Haug et al.19
Outlines of the head capsule and stylets redrawn from Badano et al.58
Outlines of the head capsule and stylets of a newly reported larva

dependent variables

Elliptic Fourier Analysis (EFA) performed with the software SHAPE
Principal component analysis (PCA)

control variables

Specimens included are extant larvae of the groups Berothidae and Dilaridae as well as fossil larvae potentially representing the same two groups

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