Table 2.

**Table 2.** *Isoplectron* Hutton, 1896 and *Praecantrix* gen. nov. Summary of Bayesian model results for length of insect body and of hind tibia as a function of sex, geographical coordinates (easting, northing in New Zealand Geodetic Datum 2000 map grid) and elevation (m a.s.l.). All models run in JASP ver. 0.17.1. Species for which sample size is too small for statistics are omitted. CI stands for credible intervals; for covariates these are only reported where they are significant.
Species	Measurements (mm)	Sample size 1	Bayesian Linear Mixed Model Fixed factor: Sex Random factor: Location	Bayesian Linear Regression Factor: Sex Covariates: Easting, Northing, Elevation
1 For the number of males and females in each sample, refer to Table 1.
Isoplectron armatum armatum Hutton, 1896	Body	46	No sexual dimorphism 95% CI: - 0.34–0.93 mm	No effect of covariates
Isoplectron armatum armatum Hutton, 1896	Hind tibia	46	+ 2.5mm in ♂ 95% CI: 1.59–3.20 mm	No effect of covariates
Isoplectron armatum aciculatum Karny, 1937	Body	13	No sexual dimorphism 95% CI: -1.09– 0.99 mm	No effect of covariates
Isoplectron armatum aciculatum Karny, 1937	Hind tibia	13	+ 3.2mm in ♂ 95% CI: 1.01–5.35 mm	No effect of covariates
Isoplectron pallidum Richards, 1972	Body	23	No sexual dimorphism 95% CI: -1.54– 1.40 mm	+ 0.13 mm per 100 m elevation 95% CI: 0.00 mm– 0.60 mm
	Body	23	No sexual dimorphism 95% CI: -1.54– 1.40 mm	+ 0.99mm per 100 km south 95% CI: 0.00 mm– 2.96 mm
	Hind tibia	23	+ 1.2 mm in ♂ 95% CI: - 0.01–2.35 mm	+ 0.15 mm per 100 m elevation 95% CI: 0.00 mm– 0.60mm
Isoplectron serratum Richards, 1972	Body	27	+ 1.2 mm in ♀ 95% CI: 0.1–2.37 mm	No effect of covariates
Isoplectron serratum Richards, 1972	Hind tibia	27	+ 3.7 mm in ♂ 95% CI: 1.84–5.89 mm	No effect of covariates
Isoplectron ferratum sp. nov.	Body	18	No sexual dimorphism 95% CI: - 1.1–2.06 mm	No effect of covariates
Isoplectron ferratum sp. nov.	Hind tibia	18	No sexual dimorphism 95% CI: - 0.27–1.23 mm	No effect of covariates
Praecantrix silvatica gen. et sp. nov.	Body	23	+ 1.2 mm in ♀ 95% CI: 0.3–1.97 mm	No effect of covariates
Praecantrix silvatica gen. et sp. nov.	Hind tibia	23	+ 0.8 mm in ♀ 95% CI: 0.12–1.43 mm	No effect of covariates
Praecantrix saxicola gen. et sp. nov.	Body	10	+ 2.8 mm in ♀ 95% CI: 1.56–4.09 mm	Sample size too small
Praecantrix saxicola gen. et sp. nov.	Hind tibia	10	+ 1.8 mm in ♀ 95% CI: 0.06–3.42 mm	Sample size too small